Fluke Air Compressor 7350 User Manual

RUSKA 7350  
High Pressure Gas Controller/Calibrator  
Users Manual  
PN 3952249  
November 2010  
© 2010 Fluke Corporation. All rights reserved. Printed in USA. Specifications are subject to change without notice.  
All product names are trademarks of their respective companies.  
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Table of Contents  
Chapter  
Title  
Page  
1
General Information ............................................................................ 1-1  
Introduction........................................................................................................ 1-1  
General Information........................................................................................... 1-1  
How to Contact Fluke........................................................................................ 1-1  
Safety Information ............................................................................................. 1-2  
Safety Summary ............................................................................................ 1-2  
Keep Away from Live Circuits ..................................................................... 1-2  
Do Not Service or Adjust Alone.................................................................... 1-2  
Resuscitation.................................................................................................. 1-2  
Electrostatic Discharge Sensitive Parts ......................................................... 1-2  
Compressed Air............................................................................................. 1-2  
Personal Protective Equipment...................................................................... 1-2  
Inert Gases..................................................................................................... 1-2  
AC Main Plug, Switch, and Power Cord....................................................... 1-2  
Symbols Used in this Manual ............................................................................ 1-3  
Features.............................................................................................................. 1-3  
Mercury-Free................................................................................................. 1-3  
NIST Traceability.......................................................................................... 1-3  
Power Supply................................................................................................. 1-3  
Measure While Control ................................................................................. 1-3  
Friendly Display ............................................................................................ 1-3  
Adjustable Pressure Display.......................................................................... 1-3  
Ease of Operation .......................................................................................... 1-4  
Easily Programmable..................................................................................... 1-4  
Attractive Desktop Packaging ....................................................................... 1-4  
Power-On Self Test ....................................................................................... 1-4  
Ease of Calibration ........................................................................................ 1-4  
Automatic Zero Adjust.................................................................................. 1-4  
Automatic Head Correction........................................................................... 1-4  
Choice of Medium......................................................................................... 1-4  
Choice of Display Units ................................................................................ 1-4  
Communications Interface............................................................................. 1-4  
Standard Equipment & Options......................................................................... 1-5  
i
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RUSKA 7350  
Users Manual  
2
Theory of Operation ............................................................................ 2-1  
Introduction........................................................................................................ 2-1  
Power Supply..................................................................................................... 2-1  
Electronics Section ............................................................................................ 2-1  
Back Plane Board .......................................................................................... 2-1  
Microprocessor Board ................................................................................... 2-1  
IEEE-488 Interface........................................................................................ 2-3  
Front Panel..................................................................................................... 2-3  
Motor Controller............................................................................................ 2-3  
76xx Interface Board ..................................................................................... 2-4  
Pneumatic Module............................................................................................. 2-4  
Pneumatic Pump............................................................................................ 2-4  
Gearmotor...................................................................................................... 2-4  
System Valve................................................................................................. 2-4  
Electronics Regulator .................................................................................... 2-5  
Dome Regulator............................................................................................. 2-5  
System Transducer ........................................................................................ 2-5  
Test Port ........................................................................................................ 2-5  
Drive Air-Supply Port ................................................................................... 2-5  
Gas Supply Port............................................................................................. 2-5  
3
Installation ........................................................................................... 3-1  
Introduction........................................................................................................ 3-1  
Unpacking the RUSKA 7350............................................................................. 3-1  
Cautions ............................................................................................................. 3-2  
Powering Up the RUSKA 7350......................................................................... 3-2  
Pneumatic Connections...................................................................................... 3-2  
Drive Air Supply Port.................................................................................... 3-2  
Test Port ........................................................................................................ 3-2  
Gas Supply Port............................................................................................. 3-2  
4
Local Operation................................................................................... 4-1  
Local Operation ................................................................................................. 4-1  
Numeric Keypad............................................................................................ 4-1  
Function Keys................................................................................................ 4-1  
Rotary Knob .................................................................................................. 4-1  
Cancel, Previous............................................................................................ 4-2  
Tutorial .............................................................................................................. 4-3  
Selecting Language ....................................................................................... 4-5  
Selecting Mode of Operation......................................................................... 4-5  
Tare Mode................................................................................................. 4-5  
Triple Range (Optional) ............................................................................ 4-6  
Main Menu......................................................................................................... 4-6  
Controlling Pressure .......................................................................................... 4-6  
Setting the Pressure Set-Point ....................................................................... 4-6  
Entering/Exiting Control Mode..................................................................... 4-7  
Vent.................................................................................................................... 4-7  
Step/Jog.............................................................................................................. 4-7  
Stepping......................................................................................................... 4-7  
Setting Step Size............................................................................................ 4-7  
Jogging .......................................................................................................... 4-7  
Menu.................................................................................................................. 4-8  
Menu | Setup.................................................................................................. 4-8  
Menu | Setup — Limits ............................................................................. 4-9  
ii  
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Contents (continued)  
Menu | Setup — User................................................................................ 4-11  
Menu | Setup — Units............................................................................... 4-13  
Menu | Setup — Remote ........................................................................... 4-15  
Menu | Setup — System............................................................................ 4-15  
Menu | Calibrate ............................................................................................ 4-16  
Calibration Password ................................................................................ 4-16  
Menu | Program — Storing A Sequence in Memory..................................... 4-17  
Preparing to Program ................................................................................ 4-17  
Entering a New Program........................................................................... 4-18  
Automatically Generating a Program........................................................ 4-20  
Changing the Name of a Program............................................................. 4-21  
Changing an Existing Program ................................................................. 4-21  
Changing the Configuration Stored with a Program................................. 4-22  
Running a Program ................................................................................... 4-23  
Menu | Test.................................................................................................... 4-24  
Menu | Test — Sweep Test ....................................................................... 4-24  
Menu | Test — Self Test ........................................................................... 4-25  
Menu | Test — Remote Test ..................................................................... 4-25  
Menu | Test — Shop1................................................................................ 4-26  
Menu | Display............................................................................................... 4-27  
Menu | Display — Blank............................................................................... 4-27  
5
Remote Operation ............................................................................... 5-1  
Remote Operation.............................................................................................. 5-1  
Capabilities ........................................................................................................ 5-1  
IEEE-488....................................................................................................... 5-1  
RS-232........................................................................................................... 5-2  
Remote/Local Operation.................................................................................... 5-2  
Configuration..................................................................................................... 5-3  
Device Messages................................................................................................ 5-3  
SCPI Command Format ................................................................................ 5-3  
SCPI Response Format.................................................................................. 5-3  
ANSI/IEEE 488.2-1987 Command Summary............................................... 5-4  
SCPI Command Summary ............................................................................ 5-4  
Example SCPI Commands ............................................................................ 5-6  
SCPI Status Registers.................................................................................... 5-7  
6005 Interface Panel Emulation......................................................................... 5-8  
Serial Operation ................................................................................................. 5-9  
6
Maintenance......................................................................................... 6-1  
Introduction........................................................................................................ 6-1  
Observing the RUSKA 7350’s Full Scale Rating.............................................. 6-1  
Observing the Software Version Number.......................................................... 6-1  
Preventive Maintenance..................................................................................... 6-1  
Initiating the RUSKA 7350’s Self Test......................................................... 6-1  
Removing the RUSKA 7350’s Cover ........................................................... 6-1  
Processor Battery ............................................................................................... 6-2  
Calibration ......................................................................................................... 6-2  
Calibration Instructions — Single Sensor ..................................................... 6-3  
Preparation..................................................................................................... 6-3  
Storing the Coefficients................................................................................. 6-4  
Editing the Calibration Coefficients.............................................................. 6-5  
Zeroing .......................................................................................................... 6-5  
RUSKA 7350 Pump Lubrication....................................................................... 6-6  
iii  
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RUSKA 7350  
Users Manual  
Approved Lubrications.................................................................................. 6-6  
Frequency of Lubrication .............................................................................. 6-6  
Lubrication Procedure ................................................................................... 6-6  
Fuse.................................................................................................................... 6-6  
Cleaning............................................................................................................. 6-6  
7
Preparation for Storage and Shipment.............................................. 7-1  
Disconnection Instructions................................................................................. 7-1  
Packing Instructions........................................................................................... 7-1  
Shipping Instructions ......................................................................................... 7-3  
Appendices  
A Summary of Specifications ......................................................................... A-1  
B
Summary of Error Messages ....................................................................... B-1  
iv  
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List of Tables  
Table  
Title  
Page  
1-1. Symbols.................................................................................................................. 1-3  
1-2. RUSKA 7350 - Options List.................................................................................. 1-5  
2-1. Conversion Factors................................................................................................. 2-3  
3-1. General Specification and Parameters.................................................................... 3-1  
v
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RUSKA 7350  
Users Manual  
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List of Figures  
Figure  
Title  
Page  
2-1. RUSKA 7350 Block Diagram................................................................................ 2-2  
2-2. Pneumatic Diagram................................................................................................ 2-4  
4-1. RUSKA 7350 Front Panel...................................................................................... 4-1  
4-2. Menu Tree.............................................................................................................. 4-2  
4-3. Main Menu............................................................................................................. 4-3  
4-4. Units - Menu .......................................................................................................... 4-3  
4-5. Main Menu - Entering Pressure ............................................................................. 4-4  
4-6. Main Menu - Control Mode ................................................................................... 4-5  
4-7. Main Menu............................................................................................................. 4-6  
4-8. Menu ...................................................................................................................... 4-8  
4-9. Menu | Setup | Menu .............................................................................................. 4-8  
4-10. Menu | Setup | Limits - Menu................................................................................. 4-9  
4-11. Menu | Setup | User - Menu.................................................................................... 4-11  
4-12. Menu | Setup | Units - Menu .................................................................................. 4-13  
4-14. Menu | Setup | Remote - Menu............................................................................... 4-15  
4-15. Menu | Setup | System - Menu ............................................................................... 4-15  
4-16. Menu | Program - Menu ......................................................................................... 4-18  
4-17. Menu | Program | Edit - Menu................................................................................ 4-19  
4-18. Menu | Program | Edit | Auto - Menu..................................................................... 4-20  
4-19. Menu | Program | Edit | Name - Menu.................................................................... 4-21  
4-20. Menu | Program | Edit - Menu................................................................................ 4-22  
4-21. Menu | Program | Config - Menu ........................................................................... 4-23  
4-22. Menu | Program | Run - Menu................................................................................ 4-23  
4-23. Menu | Test - Menu................................................................................................ 4-24  
4-24. Menu | Test | Sweep - Menu................................................................................... 4-25  
4-25. Menu | Test | Remote - GPIB Menu....................................................................... 4-26  
4-25. Menu | Test | Remote | Serial 1 - Menu.................................................................. 4-26  
4-26. Menu | Test | Shop1 - Menu ................................................................................... 4-26  
4-27. Menu | Display - Menu........................................................................................... 4-27  
7-1. Packing the Calibrator............................................................................................ 7-3  
vii  
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RUSKA 7350  
Users Manual  
viii  
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Chapter 1  
General Information  
Introduction  
This manual contains operation and routine and preventive maintenance instructions for  
the RUSKA 7350 High Pressure Gas Controller/Calibrator manufactured by Fluke. This  
portion of the manual provides general information about the RUSKA 7350 and presents  
its features and options.  
General Information  
The RUSKA 7350 uses transducers to provide the precise measurement of pressure.  
During normal operation, the RUSKA 7350 performs in either measure mode or  
control mode.  
In control mode, the RUSKA 7350 simultaneously measures and controls pressure.  
Control mode is commonly used in the calibration and testing of pressure gauges,  
transducers, pressure switches, and production pressure instruments.  
In Measure mode the RUSKA 7350 measures pressure. Typically, measure mode finds  
applications in research laboratories, testing of gauges and transducers.  
How to Contact Fluke  
To order accessories, receive operating assistance, or get the location of the nearest Fluke  
distributor or Service Center, call:  
Technical Support USA: 1-800-99-FLUKE (1-800-993-5853)  
Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853)  
Canada: 1-800-36-FLUKE (1-800-363-5853)  
Europe: +31-402-675-200  
China: +86-400-810-3435  
Japan: +81-3-3434-0181  
Singapore: +65-738-5655  
Anywhere in the world: +1-425-446-5500  
Or, visit Fluke's website at www.fluke.com.  
To register your product, visit http://register.fluke.com.  
To view, print, or download the latest manual supplement, visit  
1-1  
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RUSKA 7350  
Users Manual  
Safety Information  
Safety Summary  
The following are general safety precautions that are not related to any specific  
procedures and do not appear elsewhere in this publication. These are recommended  
precautions that personnel must understand and apply during equipment operation and  
maintenance to ensure safety and health and protection of property.  
Keep Away from Live Circuits  
Operating personnel must at all times observe safety regulations. Do not replace  
components or make adjustments inside the equipment with the voltage supply connected.  
Under certain conditions, dangerous potentials may exist when the power control is in the  
off position due to charges retained by capacitors. To avoid injuries, always remove  
power from, discharge, and ground a circuit before touching it.  
Do Not Service or Adjust Alone  
Do not attempt internal service or adjustment unless another person capable of rendering  
aid and resuscitation is present.  
Resuscitation  
Personnel working with or near dangerous voltages shall be familiar with modern  
methods of resuscitation. Such information may be obtained from your local American  
Medical Association.  
Electrostatic Discharge Sensitive Parts  
W Caution  
Electrostatic discharge sensitive (ESDS) is applied to low  
power, solid-state parts which could be damaged or destroyed  
when exposed to discharges of static electricity. Maintenance  
personnel are often not aware that an ESDS part has been  
damaged or destroyed because electrostatic discharges at  
levels less than 4,000 volts cannot be seen, felt or heard.  
Compressed Air  
Use of compressed air can create an environment of propelled foreign matter. Pressure  
system safety precautions apply to all ranges of pressure. Care must be taken during  
testing to ensure that all pneumatic connections are properly and tightly made prior to  
applying pressure. Personnel must wear eye protection to prevent injury.  
Personal Protective Equipment  
Wear eye protection approved for the materials and tools being used.  
Inert Gases  
Operation of pressure equipment may be accompanied by the discharge of inert gases to  
the atmosphere. The result is a reduction of oxygen concentration. Therefore, it is  
mandatory that all exhaust gases be vented outside the work area.  
W Warning  
If the equipment is used in a manner not specified by the  
manufacturer, the protection provided by the equipment may be  
impaired.  
AC Main Plug, Switch, and Power Cord  
The AC main plug, switch and power cord shall remain readily accessible for operation.  
1-2  
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General Information  
Symbols Used in this Manual  
1
Symbols Used in this Manual  
In this manual, a Warning identifies conditions and actions that pose a hazard to the user.  
A Caution identifies conditions and actions that may damage High Pressure Gas  
Controller/Calibrator.  
Symbols used on the High Pressure Gas Controller/Calibrator and in this manual are  
explained in Table 1-1.  
Table 1-1. Symbols  
Symbol  
B
Description  
AC (Alternating Current)  
J
Earth Ground  
W
X
Important Information: refer to manual  
Shock Hazard  
Do not dispose of this product as unsorted  
municipal waste. Go to Fluke’s website for  
recycling information.  
~
This equipment meets the requirements of all  
relevant European safety directives. The  
equipment carries the CE mark  
P
Features  
The following features are available on all RUSKA 7350s.  
Mercury-Free  
All components in the RUSKA 7350 are mercury-free.  
NIST Traceability  
All RUSKA 7350s are calibrated per ANSI/NCSL Z-540-1-1994 using RUSKA  
deadweight gauges that are directly traceable to the National Institute of Standards and  
Technology (NIST). All instruments are provided with a NVLAP accredited calibration  
certificate.  
Power Supply  
The RUSKA 7350s are either 100 – 120VAC, 1PH, 50/60 HZ or 220 – 240VAC, 1PH,  
50/60 HZ.  
Measure While Control  
The RUSKA 7350 simultaneously digitally displays the commanded pressure, the actual  
pressure, and the difference between the two. A bar graph indicates how close the actual  
pressure is to the commanded pressure, as well as how close the commanded pressure is  
to the RUSKA 7350’s full scale pressure.  
Friendly Display  
The RUSKA 7350’s color active matrix TFT display combines a bright, low-glare  
readout with a wide viewing angle. During normal operation, the measured pressure is  
easily visible from a distance of 10 feet (3 meters).  
Adjustable Pressure Display  
The pressure display may be adjusted to show one decimal greater than or less than the  
default resolution.  
1-3  
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RUSKA 7350  
Users Manual  
Ease of Operation  
An intuitive, menu-driven interface makes the RUSKA 7350 easy to use. Frequently  
used selections, such as the units of measure, are stored in memory each time the  
RUSKA 7350 powers up.  
Easily Programmable  
The RUSKA 7350’s powerful microprocessor provides the basis for smart electronics.  
With a few simple keystrokes, the user set limits on the system pressure, create unique  
units of measure, program a test sequence, and more.  
Attractive Desktop Packaging  
A sturdy aluminum case houses all of the RUSKA 7350’s pneumatics, electronics, and  
user controls. With the optional rack mount kit, this standard 19" EIA chassis fits easily  
into a rack mount system.  
Power-On Self Test  
Upon power-up, the RUSKA 7350 quickly tests its hardware and software. After the  
RUSKA 7350 completes this test, the user can select more extensive self-tests for the  
pneumatics and electronics.  
Ease of Calibration  
A four-point calibration can be performed either remotely or entirely from the front panel.  
No disassembly is required, and there are no potentiometers to tune.  
Automatic Zero Adjust  
At the user’s request, the RUSKA 7350’s software automatically performs the zero  
adjustment, with no potentiometers to tune.  
Automatic Head Correction  
The RUSKA 7350 automatically corrects for head pressure between the RUSKA 7350  
and the device under test (DUT), taking into account the density of the test gas.  
Choice of Medium  
The Pneumatic RUSKA 7350 can be used with any dry, clean nitrogen as the pressure  
medium.  
Choice of Display Units  
Standard units include inches of mercury at 0 °C and 60 °C, kiloPascals, bars, pounds per  
square inch, inches of water at 4 °C, 20 °C, and 25 °C, kilograms per square centimeter,  
millimeters of mercury, centimeters of mercury at 0 °C, and centimeters of water at 4 °C.  
Altitude and airspeed units include feet, meters, knots, and kilometers/hour. In addition to  
these predefined units, four user-defined units are programmable.  
Communications Interface  
The RUSKA 7350 includes standard RS-232 serial and IEEE-488 interfaces. The user’s  
computer communicates with the RUSKA 7350 through the Standard Commands for  
Programmable Instruments (SCPI) protocol. The RUSKA 7350 can also be configured to  
accept existing software written for the RUSKA Series 6000 DPG.  
1-4  
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General Information  
Standard Equipment & Options  
1
Standard Equipment & Options  
A standard pneumatic RUSKA 7350 comes with this manual, a power cord, a grease gun  
and grease. The standard pneumatic RUSKA 7350 is fully functional, but the following  
options are also available.  
IEEE-488 Interface: All models of the RUSKA 7350 have an IEEE-488 (GPIB) card. The  
user’s computer communicates with the RUSKA 7350 through the Standard Commands  
for Programmable Instruments (SCPI) protocol. In addition, software written for the  
Series 7000 CALIBRATOR and Series 6000 DPG is fully compatible with the  
RUSKA 7350.  
Additional Power Cords: Additional power cords are available for most countries of the  
world.  
Table 1-2. RUSKA 7350 - Options List  
Option  
Communication Software  
Part Number  
Contact Fluke  
User’s Manual  
3952249  
284174  
769422  
782771  
3898323  
658641  
2135249  
Power Cord, USA and Canada  
Power Cord, Central Europe  
Power Cord, India  
Power Cord, Japan  
Power Cord, Australia/New Zealand  
Battery  
1-5  
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Chapter 2  
Theory of Operation  
Introduction  
The RUSKA 7350’s power supply, electronics, pneumatics, and sensor combine to form  
a complete, stand-alone, measure and control instrument. This portion of the manual  
breaks the RUSKA 7350 down into its component modules (Figure 2-1) and provides a  
general discussion of each.  
Power Supply  
The RUSKA 7350 is set up as either a 120 – 130 VAC, 50/60 Hz or 220 – 240 VAC,  
50/60 Hz single phase as required by customer. Check label next to power supply inlet.  
Electronics Section  
The RUSKA 7350’s electronics section consists of the Back Plane Board, the  
Microprocessor Board, the 76XX Interface Board, the Option Board, the IEEE interface,  
and the Front Panel consisting of display and key pad.  
Back Plane Board  
The Microprocessor Board, the 76XX Interface Board, the Option Board, and the IEEE  
Board plugs into the Back Plane Board.  
The four voltages produced by the Power Supply are distributed to the Back Plane Board,  
where they are conditioned to produce four additional voltages of +5 VDC, -5 VDC,  
+12 VDC, and -12 VDC for analog use. The resulting seven DC voltages are then used  
either directly or indirectly throughout the entire RUSKA 7350.  
Microprocessor Board  
All of the RUSKA 7350’s software resides in nonvolatile, programmable, read-only  
memory (Flash EPROM) on the Microprocessor Board, which plugs directly into the  
Control Board. This software contains all of the instructions that operate the  
RUSKA 7350, as well as the conversion factors that the RUSKA 7350 uses to translate  
the detected pressure into the units selected by the user. These factors are given in  
Table 2-1.  
Data that is subject to change after the RUSKA 7350 leaves the factory is held in  
electrically erasable, programmable, read-only memory (EEPROM) on this Board.  
This includes the current units of measure, the coefficients from the zeroing process,  
the current pressure medium, and the conversion factors for the four user-defined units  
of measure.  
When the RUSKA 7350 powers up, its software is loaded into random access memory  
(RAM), which is also on the Microprocessor Board. At the same time, the values stored  
in EEPROM on the Board are restored to memory.  
2-1  
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RUSKA 7350  
Users Manual  
Another important component on the Microprocessor Board is the lithium battery, which  
continuously updates the RUSKA 7350’s date and time, even when the unit is powered  
down.  
The Sensors, Front Panel, the pump expansion and compression limit switches  
communicate with this board through cables. The Processor Board also supports the  
RS-232 serial interface, which allows the user’s computer to communicate with the  
RUSKA 7350.  
TEST PORT  
AIR  
Pneumatic Section  
SENSORS  
PUMP  
AIR REGULATOR  
GEAR MOTOR  
Electronic Section  
MOTOR  
CONTROLLER  
76XX INTERFACE  
BOARD  
MICROPROCESSOR  
BOARD  
DISPLAY/  
KEY PAD  
PANEL  
DC POWER  
SUPPLY  
BACK PLANE  
BOARD  
IEEE CARD  
OPTION  
BOARD  
AC POWER  
POWER SUPPLY  
gld01.eps  
Figure 2-1. RUSKA 7350 Block Diagram  
2-2  
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Theory of Operation  
Electronics Section  
2
Table 2-1. Conversion Factors  
Symbol  
Description  
inches of mercury (0 °C)  
inches of mercury (60 °C)  
kiloPascals  
Conversion Factor  
inHg  
inHg  
kPa  
bar  
= kPa x 0.2952998  
= kPa x 0.296134  
= kPa x 1.0  
bars  
= kPa x 0.01  
psi  
pounds per inch2  
= kPa x 0.1450377  
= kPa x 10.19744  
= kPa x 4.014742  
= kPa x 4.021898  
= kPa x 4.024108  
= kPa x 0.0101972  
= kPa x 7.500605  
= kPa x 0.7500605  
per NASA TN D-822  
= knots x 1.852  
cmH2O  
inH2O  
inH2O  
inH2O  
kg/cm2  
mmHg  
cmHg  
knots  
km/hr  
feet  
centimeters of water (4 °C)  
inches of water (4 °C)  
inches of water (20 °C)  
inches of water (25 °C)  
kilograms per cm2  
millimeters of mercury (0 °C)  
centimeters of mercury (0 °C)  
airspeed knots  
kilometers per hour  
feet of altitude  
per MIL-STD-859A  
per MIL-STD-859A  
= kPa x User defined  
= kPa x User defined  
= kPa x 1000.0  
meters  
user1  
user2  
Pa  
meters of altitude  
user defined  
user defined  
user defined (Pascals)  
user defined (percent of full scale)  
%FS  
IEEE-488 Interface  
The RUSKA 7350’s IEEE-488 (GPIB) Interface Card, which plugs directly into the  
Back Plane Board, provides the RUSKA 7350 with an IEEE-488 Interface. This interface  
allows the user to automate the measurement and control processes.  
Front Panel  
The Microprocessor Board interprets all input from the Front Panel. The Front Panel  
contains the active matrix TFT color display, rotary knob and rubberized keys used to  
operate the RUSKA 7350.  
Motor Controller  
This motor controller controls the speed of the motor driving the pump in the pneumatic  
section of the 7350. The motor controller receives its analog signal (+/-10VDC) from the  
76XX Interface Board and in turn runs the motor at variable speed. The controller can be  
configured with jumpers for either 115 VAC or 230 VAC power supply.  
2-3  
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RUSKA 7350  
Users Manual  
76xx Interface Board  
This board interfaces and conditions the pump position signal. The board interfaces  
these signals between the electronic and pneumatic module. This board also provides  
a 0 – 10 VDC signal to 0 – 100 psi electronic pneumatic regulators and the motor  
controller.  
Pneumatic Module  
The pneumatic section shown in Figure 2-2 houses components that control and  
accurately measure pneumatic pressure.  
TRANSDUCER  
RELIEF  
VALVE  
SUPPLY  
PORT  
TEST  
PORT  
AIR SUPPLY  
110 PSI  
AIR-OPERATED  
VALVE  
RELIEF  
VALVE  
ELECTRONIC  
REGULATOR  
PNEUMATIC  
PUMP  
SOLENOID  
VALVE  
VARIABLE  
SPEED  
GEARMOTOR  
gld02.eps  
Figure 2-2. Pneumatic Diagram  
Pneumatic Pump  
The pneumatic pump is a positive displacement pump that precisely varies the system  
pressure by compressing and expanding system gas. The pump is driven by a variable  
speed gear-motor. The pump has a position sensor that tracks the position of the pump  
plunger. It has two travel limit switches at each end of its stroke.  
Gearmotor  
The variable-speed gear motor drives the pneumatic pump. The gear box on the motor  
reduces the motor speed.  
System Valve  
The system valve isolates the pump and system from the gas supply regulators. It is a  
high pressure air-operated valve. This valve has a diaphragm operator that requires a  
minimum of 60 psi of air pressure to close the valve. The air is supplied to this valve  
through a three-way normally-open solenoid valve.  
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Theory of Operation  
Pneumatic Module  
2
Electronics Regulator  
The electronics regulator supplies a 0 – 100 psi air signal for the dome regulator.  
The electronics regulator is driven by a 0 – 10 VDC signal from the interface board.  
Dome Regulator  
The dome regulators, which are self-relieving, “rough” in the commanded pressure.  
The precise pressure is then achieved by the pump after closing the system valve.  
System Transducer  
The system transducer accurately measures (accuracy is specified as purchased,  
0.01% minimum) the controlled pressure. This transducer should be calibrated at  
a regular interval to maintain its stated accuracy.  
Test Port  
The device under test is connected to this port. This port is a 1/8 NPT female.  
Drive Air-Supply Port  
The supply air is connected to the drive-air supply port. The supply air should be  
100 – 110 psi (7 – 7.5 bar). The pneumatic side is protected by a relief valve set at  
120 psi. (8.3 bar). This port is a 1/4 NPT female connection.  
Gas Supply Port  
The clean, dry gas supply is connected to this port. The gas pressure should be 10%  
above the full scale pressure of the controller. This port is a 1/8 NPT female connection.  
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RUSKA 7350  
Users Manual  
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Chapter 3  
Installation  
Introduction  
This portion of the manual discusses initial installation for the RUSKA 7350. Installing  
the RUSKA 7350 is a relatively simple process of unpacking the RUSKA 7350,  
powering it up, and then using the front panel to configure the system.  
Unpacking the RUSKA 7350  
Carefully unpack all components, checking for obvious signs of damage. In addition to  
any nonstandard items ordered with the RUSKA 7350, the shipment should contain at  
least the following items:  
RUSKA 7350  
power cord, and this user’s manual  
grease gun and grease  
If necessary, report any shipping damage to the freight agency. Remove masking tape,  
strings, and packing materials from all components. If possible, save the packing  
materials for future use.  
Finally, install the Calibrator in a location that meets the requirements listed in Table 3-1.  
Note  
The RUSKA 7350 should not be subjected to mechanical shocks during  
installation or use. It should be mounted on a rigid bench or in a sturdy  
19 inch rack. Although the zeroing process will compensate for a slightly  
unlevel mounting; the RUSKA 7350 should be mounted to within 5º of level.  
Table 3-1. General Specification and Parameters  
Parameter  
Operating Humidity Range  
Operating Temperature Range  
Storage Humidity Range  
Storage Temperature  
Power Requirements  
Value  
5% to 95% RH  
Model  
all  
5 °C to 50 °C  
None1  
all  
all  
all  
-20 °C to 70°C  
100 – 120 VAC or 220 – 240 VAC all  
30 minutes all  
Warm Up Period  
3-1  
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RUSKA 7350  
Users Manual  
W Caution  
If there is any condensation, the RUSKA 7350 must be  
thoroughly dried before power is applied.  
Cautions  
The following cautions should be heeded at all times to insure safe operation of the  
RUSKA 7350.  
WX Warning  
Never operate the unit with the cover removed. The power  
supply has internal voltages near 400 volts.  
Never apply more than 110% of the unit’s full scale pressure range to the test port. Never  
try to control while a pressure source is connected to the test port.  
Avoid thermal and mechanical shock to the instrument. This will affect performance and  
require re-zeroing.  
Powering Up the RUSKA 7350  
1. First, plug the power cord supplied with the RUSKA 7350 into the power connector  
on the RUSKA 7350’s back panel.  
Note  
Grounding for the RUSKA 7350 is provided through the power cord.  
2. Next, plug the power cord into a receptacle rated for either 100 – 120 VAC  
or 220 – 240 VAC (check name plate). If a different power cord is necessary for your  
receptacle, consult Table 1-1 for available power cords.  
3. Finally, turn on the RUSKA 7350 by flipping the POWER switch on the back panel.  
The MEASURE screen will appear on the color display, and the front panel will be  
fully operational.  
Pneumatic Connections  
Pneumatic connection to the RUSKA 7350 is straightforward. The following sections  
discuss each port.  
Drive Air Supply Port  
The air supply port must be connected to a well regulated source of dry shop air.  
Air supply should be 100 – 110 psi (7 – 7.5 bar). Supply port is a 1/4 NPT female  
connection.  
Test Port  
The test port is designed to control a wide range of volumes. Any leaks on the test port  
will cause measurement errors. For best results, a volume of approximately 3 in3 (50 cc)  
is recommended. The test port is 1/8 NPT female.  
Gas Supply Port  
The gas supply port should be connected to a clean, dry gas supply with a pressure of  
110% of full scale pressure. The port is 1/8 NPT female.  
3-2  
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Chapter 4  
Local Operation  
Local Operation  
This section of the manual describes operation of the Calibrator using the front panel.  
The local interface (front panel) consists of a color TFT display, a rotary knob and a set  
of keys. The display shows the system status and menu options. The keys are grouped  
according to function.  
gld03.bmp  
Figure 4-1. RUSKA 7350 Front Panel  
Numeric Keypad  
This includes the number keys, the decimal point [.], and the change sign key [-]. The  
UNITS key changes between units of measure, MODE changes between modes of  
operation such as gauge and absolute, MEASURE is used to place the unit into measure  
mode. CLEAR key will clear the numeric entry field. The ENTER key accepts the  
entered number or confirms a command.  
Function Keys  
These are the six keys that run vertically beside the display. The label shown in the  
display beside each key identifies their function. These functions will change based on  
which screen you are operating. For ease of communication, throughout the manual we  
refer to these keys as [F1] through [F6]. We consider the top key to be F1 and the  
bottom F6.  
Rotary Knob  
The rotary knob selects a field for editing and is used for small pressure changes  
(pressure jog) at the main menu.  
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RUSKA 7350  
Users Manual  
Cancel, Previous  
These keys are used to stop, undo, or exit the current operation. The CANCEL key  
returns all edited fields on the current entry screen to their original values. It also stops  
the current program sequence or calibration process. The PREVIOUS key exits the  
current menu and returns to the previous menu.  
Figure 4-2 is a menu tree showing the relationship between all the menus in the system.  
Refer to it for selections available under the menu. To move to a lower menu, press the  
function key with the correct label. To move towards the Main Menu, press the  
PREVIOUS key. In the Main Menu screen, the [F2] key places the unit in Control mode,  
ENTER must be pressed to actually enter the Control mode. The [F3] key places the unit  
in Vent mode. This opens the test port to atmosphere and rapidly reduces the pressure,  
ENTER is required to confirm the operation. The [F5] key places the unit either the step  
or the jog mode and the rotary knob is then used to set the control set-point by the correct  
step or jog amount. To go to one of the menus, press the [F6] key.  
gld32.eps  
Figure 4-2. Menu Tree  
4-2  
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Local Operation  
Tutorial  
4
Tutorial  
To begin the tutorial, first verify that the Calibrator is powered-up and that the pneumatic  
connections have been completed. The Calibrator should display a screen similar to the  
one shown below. (The right hand side of the display should show the options). At power  
up, there may be errors relating to the default settings. If an error message is displayed in  
red at the bottom of the screen, press [F6], then press PREVIOUS. If multiple errors exist,  
you will need to press the [F6] key multiple times to clear all of the errors.  
gld04.bmp  
Figure 4-3. Main Menu  
Figure 4-3 shows the Main Menu. It is at the top level of the menu tree (see Figure 4-2)  
and all descriptions in this manual start from this point. The double sized numbers in the  
top center of the display shows the current measured pressure (0.00 psi diff). The upper  
left corner shows the current mode of the Calibrator (MEASURE, CONTROL or VENT).  
The right side of the screen shows a bar graph displaying the current pressure relative to a  
user-configurable full-scale value. Below the pressure is the pressure control set-point;  
below this is the difference between the set-point and the actual value. Below this is a  
numeric scratchpad for entering a new set-point value. The highlighted label on the right  
hand side of the screen displays the current assignments of the function keys [F1] through  
[F6] that are located beside the display.  
1. Change the pressure units. The units are changed by selecting the UNITS key on  
the keypad.  
gld05.bmp & gld06.bmp  
Figure 4-4. Units - Menu  
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RUSKA 7350  
Users Manual  
2. Use the rotary knob located to the right of the display to move the highlight bar to the  
desired unit.  
Note  
The highlighted curser initially shows the current unit of measure. When  
the rotary knob is moved, the current unit remains highlighted in a gray  
color, and the new unit is highlighted in a light blue color.  
3. When the unit desired is highlighted, press the ENTER key on the far right side of  
the front panel, under the numeric keypad. The display will return to the Main screen  
with the current units.  
The second part of this tutorial uses the Calibrator to generate pressure. The pressure  
supply must be connected and the test port must be connected to a closed volume, in  
accordance with Chapter 3, Pneumatic Connections section.  
4. From the Main Menu, use the numeric keypad to enter the starting pressure. The  
pressure is entered in the units set in the previous exercise. As the pressure is entered,  
each digit will be displayed in the numeric scratchpad (the highlighted box in the  
lower section of the display). If a mistake is made, press the CLEAR key (found in  
the numeric keypad), and the numeric scratchpad will be cleared.  
gld07.bmp  
Figure 4-5. Main Menu - Entering Pressure  
5. When the entry is correct, press the ENTER key. The scratchpad will be cleared and  
the value will appear as the new set-point.  
6. Now that the starting pressure is entered, enter Control mode. Press Control [F2].  
The CONTROL label will be highlight, and the message “Press Enter to Confirm”  
will appear below the scratch pad. Notice that the upper left corner still shows  
MEASURE. The Calibrator stays in Measure mode until the change is confirmed.  
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Local Operation  
Tutorial  
4
gld08.bmp  
Figure 4-6. Main Menu - Control Mode  
7. Press ENTER to confirm the mode change. The upper left corner will change to  
CONTROL, and the pressure will start moving towards the set-point.  
8. After the pressure is stabilized, assure that the word Step is highlighted in the  
Step/Jog [F5]. The Step/Jog [F5] key toggles between Step and Jog, to switch  
between these modes, press the function key 5 [F5]. In addition to using the keypad  
to enter a pressure set-point, you can also use the step function. Using the rotary knob,  
rotate the knob clock-wise to increase the set-point, or counter clock-wise to decrease  
the controller set-point. The scratchpad will be updated with a new set-point. The  
step size defaults to 10% of full scale. This step size is user defined and can be  
changed in the Menu | Setup | User menu.  
9. Press ENTER to accept the new set-point. The Calibrator will move to the new  
set-point.  
10. Press Measure key which is located in the key-pad. The Calibrator will change to  
Measure mode. No confirmation is necessary to leave Control mode.  
Selecting Language  
The RUSKA 7350 Calibrator can operate in a variety of different languages. To select a  
different language, press the Mode key two times MODE, MODE. The current language  
will be highlighted. Use the rotary knob to highlight a new language and hit the ENTER  
key to select that language.  
Selecting Mode of Operation  
The RUSKA 7350 Calibrator normally operates in Absolute mode but also supports Tare  
mode for calibration of Gauge mode sensors. As an option for increasing accuracy by  
limiting range, the RUSKA 7350 Calibrator may be ordered with Triple Ranging.  
Tare Mode  
Press the Mode key then press Tare [F3] to turn on Tare mode. The current pressure  
reading will be stored as the tare offset and the pressure reading will be zeroed. Press  
Tare [F3] again to turn off Tare mode.  
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RUSKA 7350  
Users Manual  
Triple Range (Optional)  
When Triple Ranging is enabled the currently selected range will be displayed below the  
current pressure. To change to a different range make sure the pressure is below 100 psi  
(700 kPa). Then press the Mode key and then press Range [F5] until the correct range  
is displayed. If the current pressure range is exceeded the range will automatically change  
to the highest range until manually changed.  
Main Menu  
The Main Menu displays the measured pressure in double-sized numbers. Below the  
pressure reading is the current unit of measure and mode (Tare or Absolute). The Main  
Menu can always be reached by repeatedly pressing PREVIOUS. The RUSKA 7350 is  
designed such that all of the commonly used functions are accessible by a direct key on  
the key pad or from a top level function key. Less commonly used set-up type functions  
are accessible through the menu function key.  
gld09.bmp  
Figure 4-7. Main Menu  
Controlling Pressure  
The Control [F2] function key is used to place the Calibrator into the Control Mode. A  
pressure set-point should be entered into the Calibrator prior to placing the unit into the  
control mode. This is to assure that the operator is aware of the set-point valve prior to  
entering into the control mode.  
Setting the Pressure Set-Point  
The pressure set-point is the destination of the pressure control algorithm. It should be set  
before entering Control mode. The pressure set-point is set to zero at power-up or  
whenever a pressure error occurs.  
1. The pressure set-point is set from the Main Menu. (Press PREVIOUS until the Main  
Menu appears.)  
2. Use the numeric keypad to enter the new pressure set-point in the current pressure  
units.  
3. Press ENTER to accept the entry or press CLEAR to clear the numeric scratchpad.  
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Local Operation  
Vent  
4
Note  
The set-point can also be changed using either the Step or the Jog function.  
Please see Chapter 4, Step/Jog.  
Entering/Exiting Control Mode  
1. The Control mode is set from the Main Menu. (Press PREVIOUS until the Main  
Menu appears.)  
2. Press CONTROL [F2] to enter Control mode. ENTER must be pressed to confirm  
entry into Control mode.  
3. Press MEASURE key found in the keypad to exit Control mode. No confirmation is  
necessary.  
Vent  
The Vent [F3] function is used to rapidly vent the pressure in the system to atmosphere.  
Step/Jog  
In addition to entering the pressure set-point through the key-pad, the pressure set-point  
can be changed using either the step or the jog functions. The Step function is used  
primarily when the operator is taking pressure steps in equal pressure increments. The  
size of the pressure step is user defined. The Jog function is most often used when  
calibrating mechanical gauges such as a dial gauge and the operator wishes to change the  
pressure until the mechanical gauge indicates a cardinal point. The operator can then read  
the higher resolution Calibrator to determine the actual pressure value when the  
mechanical gauge is indicating a cardinal point. The Step/Jog [F5] key toggles between  
Step and Jog, to switch between these modes, press the function key 5 [F5].  
Stepping  
Assure that the word Step is highlighted in the Step/Jog [F5]. Using the rotary knob,  
rotate the knob clock-wise to increase the set-point, or counter clock-wise to decrease the  
controller set-point. The scratchpad will be updated to a new set-point. The step size  
defaults to 10% of full scale. Press ENTER to accept the new set-point.  
Setting Step Size  
From the Main Menu, press Menu [F6] Setup [F2 User [F2]. Using the rotary knob,  
move the cursor to highlight Step Size. Enter the desired step size in the current pressure  
units and press ENTER.  
Jogging  
Assure that the word Jog is highlighted in the Step/Jog [F5]. From the Main Menu, the  
pressure set-point can be modified by rotating the rotary knob clockwise to increase  
pressure and counterclockwise to decrease pressure. Each increment or decrement will  
change the pressure in the least significant digit. Continually rotating the rotary knob, the  
pressure will continue to change until the rotation is stopped.  
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RUSKA 7350  
Users Manual  
Menu  
The menu key is used to access the less commonly accessed configuration type functions.  
This accesses the Setup, Calibration, Program, Test and Display functions.  
gld10.bmp  
Figure 4-8. Menu  
Menu | Setup  
Setup is used to configure the system. It includes setting all of the limits, user parameters,  
user-defined units of measure, remote interface and system setup.  
gld11.bmp  
Figure 4-9. Menu | Setup | Menu  
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Local Operation  
Menu  
4
Menu | Setup — Limits  
The Menu | Setup | Limits menu is used to setup all of the limits in the system. The  
pressure limits can be used to protect the device-under-test (DUT) from overpressure.  
gld12.bmp  
Figure 4-10. Menu | Setup | Limits - Menu  
High Limit  
High limit is the user-defined Maximum pressure limit. This is often set just over the  
full-scale pressure of the device under test (DUT) in order to protect the DUT. The  
Calibrator will then prevent the pressure from exceeding the high limit. If the user enters  
a value greater than the user defined limit, the unit will not accept the value and it will  
generate an error code informing the user that they have entered a set-point that is greater  
than the high pressure limit. In control mode, if for any reason the pressure exceeds the  
user defined limit, it will change into the measure mode and again display an error  
message to the operator informing them of the error that occurred.  
This value can be edited using the rotary knob to highlight the High Limit. Then enter the  
new value using the keypad. This will show up in the scratch pad on the lower portion of  
the screen. Press the Enter key and the value for the high limit will be updated to the  
value that was typed into the scratchpad.  
Low Limit  
User defined Minimum pressure limit. This is the same as the high limit except it is to  
protect the DUT from low pressure limits.  
Auto Vent  
User defined maximum pressure that the Calibrator can reach prior to venting the test  
port to atmosphere.  
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RUSKA 7350  
Users Manual  
Control Band  
There are two common pressure control approaches that are available with the  
RUSKA 7350 Calibrator. One of the most common control styles is an Active controller  
where the controller remains operative and holds the pressure at a commanded set-point.  
This allows the system to hold the pressure at a set-point within the control stability  
specification (See Appendix A). In addition to possible leaks in a system, following a  
pressure step, the pressure in the system changes due to temperature effects. When  
operating an Active control system, the controller continuously monitors any pressure  
variances in the system and compensates for these effects to hold the pressure at the  
set-point. The benefit of the Active control is that it can maintain the pressure at the  
commanded set-point even when there are slight leaks in the system or the system is not  
thermally stable.  
The second approach is to control the pressure in the system to a set-point and then to  
shut-off the Active controller. We describe this as a Passive control mode. Following a  
pressure step and the controller becomes passive, the pressure will continue to change in  
the system due to thermal effects. However these thermal effects will stabilize over time.  
Once the system has thermally stabilized, pressure measurements can be made in the  
system without any “pressure noise” injected into the system as a result of having an  
Active controller in the system. The result would be that the controller would not add any  
additional uncertainty to the pressure measurement since it would be inactive during the  
measurement process. For this method, pressure will not be at a cardinal set-point.  
When the Control Off Band and Control On Band are set to zero, the Calibrator operates  
in the Active control mode. Setting a Control On and Off Band, places the Calibrator in  
the Passive control mode.  
The Control On and Off Band provides a tolerance around the pressure set-point in the  
current unit of measurement. The Controller will control the pressure to the commanded  
set-point. Once the actual pressure is within the user defined +/- Control Off Band  
tolerance, the controller will shut off. The pressure will remain at this level, only  
changing by the thermal influences or leaks in the system. The controller will remain off  
until it reaches the +/- Control On Band limit. The controller will then re-activate and  
control the pressure back to the Control Off Band tolerance. This mode of operation  
removes any added uncertainty in the measurement system due to the controller since the  
controller is Passive during the high accuracy pressure measurements.  
As an example, if a 100 psi (690 kPa) full scale Calibrator was set-up with the Control  
Off Band at 0.001 psi (0.007 kPa) and the Control On Band set to 0.005 psi (0.035 kPa).  
This would place the Calibrator in a Passive control mode. If the Calibrator was placed  
into the control mode with a pressure set-point of 10 psi (69 kPa), it would control up to  
the 10 psi (69 kPa) value. Once it reached a pressure of 9.999 psi (68.993 kPa) the active  
control would turn off. Due to the thermal effects caused by pressurizing the system, the  
pressure will start reducing in the system. Once the pressure reaches 9.995 psi  
(68.965 kPa) the active controller would automatically turn on and control the pressure  
back to 9.999 psi (68.993 kPa) and then turn off. After a few cycles, the system will  
thermally stabilize and the pressure will hold between the Control On and Control Off  
Bands.  
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Local Operation  
Menu  
4
Slew Rate  
User defined maximum pressure rate of change. The Calibrator is designed to control  
with minimum overshoot into a wide variety of external volumes at its highest slew rate.  
Therefore, in most applications it is recommended that the slew rate be set at its  
maximum rate value. This provides the highest speed control without jeopardizing  
overshoot or control stability properties. The only application where the operator may  
wish to slow down the slew rate (control speed) is in applications where the device under  
test could be damaged by high rate of pressure change. The Calibrator control algorithm  
tries to limit the rate of pressure change to the slew rate. On Calibrator’s will full scale  
pressures ranges less than 10 psi (70 kPa), it is common to reduce the slew rate to less  
than 25% of full scale to improve on control overshoot characteristics.  
Slew Limit  
The slew limit is used by the system to assure that the slew rate is not exceeded. If the  
slew rate is exceeded, the Calibrator will change from the control mode to the measure  
mode and it will generate an error message to the operator.  
Access  
The test access password allows the user to protect access to Calibrator configuration and  
programs. If the test access password is set to any number other than zero (factory  
default), it is required before the user is allowed to change the limits, control parameters  
or programs.  
Note  
It is recommended that the access password be recorded and filed in a  
secure location.  
Menu | Setup — User  
The Menu | Setup | User menu is used to setup all of the user specific configurations.  
This includes setting the control step size, range of bar-graph, pressure gas head, display  
pressure filter, display resolution digits, and audible key click.  
gld13.bmp  
Figure 4-11. Menu | Setup | User - Menu  
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RUSKA 7350  
Users Manual  
Step Size  
In addition to entering the pressure set-point by the key-pad, the pressure set-point can be  
changed using the step function. The step function is used primarily when the operator is  
taking pressure steps in equal pressure increments. The size of the pressure step is user  
defined. From the Main Menu, press Menu [F6], Setup [F2], and then User [F2]. Using  
the rotary knob, move the cursor to highlight Step Size. Enter the desired step size in the  
current pressure units and press ENTER.  
Bar Graph Maximum  
The bar graph on the Main Menu screen can be scaled to match the device under test by  
setting the full scale value of the bar graph.  
Ready Tolerance  
A Ready indication is generated when in control mode and the measured pressure is  
reading within this ready tolerance value. When running an internal program, the ready  
indicator is shown when the measured pressure is within the tolerance stored in the  
program.  
Gas Head Pressure Correction  
The term “head height” refers to the vertical distance between the sensing element in the  
device under test and the Calibrator’s pressure reference plane. Once the user inputs the  
head height and selects air or nitrogen, the Calibrator automatically corrects for head  
pressure.  
1. The Pressure Reference Line on the Calibrator is defined as the bottom of the color  
display where the display and the front panel join. This provides the reference plane  
against which the device under test (DUT) pressure is measured.  
2. Determine the vertical distance between the Calibrator Pressure Reference Line and  
the reference plane of the device under test.  
3. Press the Unit key found in the keypad and press in/mm [F1] to select either inches  
(in) or millimeters (mm) for the head height entry.  
4. The head height is set from the Menu | Setup | User. From the Main Menu (press  
PREVIOUS until the Main Menu appears), press Menu [F6 Setup [F2] User [F2].  
5. Press Medium [F3] to select either “Air” or “Nitrogen”. The selected units will be  
highlighted.  
6. Press Position [F4] to select if the position of the Device Under Test is either  
“Above” or “Below” the 7350. The selected units will be highlighted and appear in  
the Gas Head description.  
7. Use the rotary knob to highlight the label “Gas Head”.  
8. Use the numeric keypad to enter the height in the selected unit.  
9. Press ENTER to accept the entry.  
Atmosphere  
The nominal barometric pressure value for the location that the Calibrator is utilized  
should be entered for atmosphere. On tare mode instruments, this number is used to  
calculate the density of the test port pressure medium and to correct for head pressure  
variances between the reference port of the Calibrator and the DUT.  
4-12  
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Local Operation  
Menu  
4
Pressure Filter  
The Pressure Filter is used to adjust the degree to which the front display pressure value  
is filtered. A value of four (4), is the default value. As the value increases, the filtering  
level increases, however, the display update rate reduces. Typical filter values would  
range between 1 to 10.  
Changing the Number of Decimals  
Each unit has a default number of decimal places used for pressure display. This may be  
adjusted up or down by one decimal place.  
1. The decimal digits are set from the Menu | Setup | User. From the Main Menu (press  
PREVIOUS until the Main Menu appears), Menu [F6 Setup [F2] User [F2].  
2. Turn the rotary knob until the label “Display digits” is highlighted.  
3. Turn the rotary knob further until the desired number of digits from the default  
resolution is highlighted (-1, 0, +1), and then press the ENTER key to select.  
Key Click  
The Calibrator can be configured to emit a “clicking” sound each time a key is pressed.  
1. The key “click” is set from the Menu | Setup | User. From the Main Menu (press  
PREVIOUS until the Main Menu appears), press Menu [F6 Setup [F2] User [F2].  
2. Turn the rotary knob to highlight “Key click” and then highlight either On or Off.  
3. Press the ENTER key to select.  
Menu | Setup — Units  
In addition to the standard units of measure provided by the Calibrator, four user-defined  
units are available. To create a user-defined unit, the user enters a name that is one to ten  
characters long and a conversion factor that is a multiple of kiloPascals (kPa).  
For example, using the information from Table 2-1, the conversion factor for millitorr or  
one micron of mercury at 0 °C is calculated as follows.  
1000 mTorr  
1 Torr  
1 Torr  
1 mmHg 0°C  
0.1450377 psi  
1 kPa  
mTorr = kPa x  
x
x
x
1 mmHg 0°C 0.0193377 psi  
thus the conversion factor simplifies to mTorr = kPa x 7500.6180  
gld14.bmp  
Figure 4-12. Menu | Setup | Units - Menu  
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Users Manual  
1. The pressure units are defined from the Menu | Units | Define. From the Main Menu  
(press PREVIOUS until the Main Menu appears) press Menu [F6 Setup [F2]  
Units [F3].  
2. Use the rotary knob to highlight the desired user-defined unit, and then select the Edit  
Name [F1] function key.  
3. The following sequence is used to change the name of the selected unit.  
a. Use the < [F4] or > [F5] key to highlight the desired character in the matrix.  
b. Use the rotary knob to change the character.  
c. Repeat steps a and b until the desired name is entered. Press the Clear key to  
start over.  
d. Press the Done [F6] key when the name change is completed.  
gld15.bmp  
Figure 4-13. Menu | Setup | Units | Edit Name - Menu  
4. Use the rotary knob to highlight the desired user-defined unit that has just been  
renamed.  
5. Use the numeric keypad to enter the conversion factor and press ENTER to accept.  
6. Press PREVIOUS three times to return to the Main Menu. The new unit definition  
may now be selected using the Units key.  
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Local Operation  
Menu  
4
Menu | Setup — Remote  
The Menu | Setup | Remote screen is where the remote communication interface  
is set-up.  
gld16.bmp  
Figure 4-14. Menu | Setup | Remote - Menu  
GPIB Address  
Sets the IEEE-488 interface address.  
Protocol  
The Protocol defines which protocol should be used by the remote interface. The options  
are Standard Communication for Programmable Instruments (SCPI) which is the standard  
interface, 6000 to emulate the Series 6000 pressure controller, and 510 to emulate the  
Model 510 pressure controller. When using the SCPI interface, the RUSKA 7350 will  
emulate the 7010 and 7215 series controllers.  
Serial Interface Set-Up  
The operator can set-up the Baud Rate, Data Bits, Parity, and Stop Bits for the Serial  
Interface.  
Menu | Setup — System  
The System Menu identifies the Software release version that is being operated in the  
Calibrator. It also stores and allows the operator to edit the Date and Time.  
gld17.bmp  
Figure 4-15. Menu | Setup | System - Menu  
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Users Manual  
Date/Time  
The Calibrator’s system clock is continuously updated. If the date or time requires editing,  
the following applies;  
1. The date and time are set from the Setup | System | Menu. From the Main Menu  
(press PREVIOUS until the Main Menu appears), press Menu [F6] | Setup [F2] |  
System [F5].  
2. To set the system date, turn the rotary knob until Date is highlighted. Use the numeric  
keypad to enter the current four-digit year, month, and day (yyyymmdd). All digits  
must be entered. Press ENTER to accept.  
3. To set the system time, turn the rotary knob until Time is highlighted. Use the  
numeric keypad to enter the current hour, minute, and second (hhmmss). All digits  
must be entered. Press ENTER to accept.  
Reset  
The Reset [F1] command is used to re-boot the Calibrator.  
To reset the system, from the Main Menu (press PREVIOUS until the Main Menu  
appears), press Menu [F6] | Setup [F2] | System [F5] | Reset [F1].  
Menu | Calibrate  
The Menu | Calibrate command is used to perform the calibrations on all of the sensors  
utilized by the Calibrator. The RUSKA 7350 can be completely calibrated using the front  
panel interface. It does not require any external computer or software in order to perform  
a successful calibration. It also has the capability of being calibrated remotely through  
either the RS232 or IEEE-488 interface. The RUSKA 7350 will guide the operator  
through a menu driven calibration procedure identifying the pressures that should be  
supplied by a standard. Following the calibration procedure, the RUSKA 7350 calculates  
and saves its own coefficients. The calibration coefficients are date stamped so the user  
can easily identify the last time the instrument went through a full calibration, when the  
coefficients were last edited or when the Calibrator was re-zeroed.  
The calibration section in the RUSKA 7350 can be password protected to prevent any  
unauthorized entry into the calibration section of the system. Please refer to Chapter 6,  
Maintenance, of the manual for more detailed information regarding the calibration of the  
RUSKA 7350.  
Calibration Password  
The calibration password allows the user to protect access to Calibrator calibration  
constants and the calibration procedure. If the calibration password is set to any number  
other than zero, it is required before the user is allowed to calibrate the Calibrator or  
manually change the calibration constants.  
Note  
It is recommended that the access password be recorded and filed in a  
secure location.  
1. The calibration password is set from the Calibration Menu. From the Main Menu  
(press PREVIOUS until the Main Menu appears), press Menu [F6] | Calibrate [F3] |  
Menu | Calibrate | Edit.  
2. Press the Access [F4] key. If there is a password in the system other than 0, then you  
must enter the current valid password into the RUSKA 7350 before it will allow you  
to modify the password.  
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Local Operation  
Menu  
4
3. Use the numeric keypad to enter the new calibration password. Setting the calibration  
password to zero allows free access to Calibrator calibration and constants. Press  
ENTER.  
4. Press Yes [F4] to acknowledge changing the calibration password. Press No [F5] to  
reject changing the calibration password.  
Menu | Program — Storing A Sequence in Memory  
Consider an exercise that requires the Calibrator to start at 30 psi, increase to 50 psi, then  
decrease to 20 psi. Test sequences like this may be stored in the Calibrator’s memory as a  
program.  
One benefit of storing a sequence in memory is that the user does not have to command  
each pressure separately every time a multipoint test or calibration routine is performed.  
Another benefit is that the user can specify a tolerance for each set-point pressure. Once  
a tolerance is set, the dwell timer will start counting down instead of waiting until the  
pressure is at the exact set-point to start the dwell timer. This gives the user a time  
advantage compared to manual mode operation and provides a degree of automation  
without the use of an external computer.  
Note  
The Calibrator can store up to 1,000 program steps that may be divided  
among a maximum of 20 named programs.  
Preparing to Program  
Before entering a test sequence, consider the items discussed below.  
Program Name  
Valid program names range from one to eight characters in length and can include  
numbers, upper case letters, and the /, %, and # symbols. For example, Exer#14 and %FS  
test are both valid names.  
Configuration  
Since a program will depend on the current setup of the Calibrator (the current  
configuration is stored with the program) the user should set the units, limits, control  
parameters, etc., to the desired values before creating a program.  
Number of Set-points  
Before entering the sequence, the user should determine the number of upscale and  
downscale set-points required to complete the exercise.  
Set-point Pressure and Tolerance  
Each set-point in the program requires both a pressure and a tolerance, in the current units  
of measure. For example, one set-point might require a tolerance as low as 0.05 psi  
(0.35 kPa), whereas another set-point in the same program could be satisfied with a  
tolerance as high as 5 psi (0.35 kPa).  
Dwell Time  
Once the pressure is within the specified tolerance, the Calibrator starts a timer that runs  
for a user-defined number of seconds. This is referred to as dwell time. As long as this  
timer is running, the Calibrator will remain at the designated set-point unless the max  
time (see below) elapses. When the dwell time expires, the Calibrator will proceed to the  
next step. Typically the dwell time should be set to a value less than the max time.  
Usually dwell time has a value of a few seconds, but a value of 0 can be used to create a  
pause in the program. When the dwell time is set to zero, the Calibrator switches to  
manual control once it is within the tolerance value of the set-point pressure. The user  
must then press a key on the front panel to continue the program.  
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Users Manual  
MaxTime  
The max time is the maximum time in seconds including the dwell time that the  
Calibrator can spend on one step of the program. After the max time elapses, the  
Calibrator will automatically proceed to the next set-point in the program, even if the  
current set-point has not been achieved. Thus, the max time selection limits the amount of  
time that the Calibrator can spend on any one set-point. Typically the max time should be  
set to a value greater than the dwell time. If the max time is set to zero, the Calibrator will  
attempt to achieve the set-point indefinitely (i.e. the max time function is disabled).  
Mode of Entry  
If the upscale portion of the desired pressure step sequence and the downscale portion of  
the sequence both have the same highest and lowest set-points and consist of evenly  
spaced steps, the <Auto> option can be used to automatically generate the program.  
However, if any part of the sequence includes unevenly spaced steps, or the starting and  
ending set-points are not the same, each step must be programmed individually. In the  
example given at the beginning of the section Menu | Program – Storing a Sequence in  
Memory, each step must be programmed individually since the starting set-point is 30 psi  
and the ending set-point is 20 psi.  
Detailed instructions for entering these items are given in the sections that follow.  
Entering a New Program  
To program the Calibrator, use the keys on the front panel to change values on the  
Calibrator’s program editing screen. Instructions for entering each step of a new program  
are included below.  
1. Ensure that the units, limits, and control parameters have been set to the desired  
values.  
2. The program is entered from the Program Menu. From the Main Menu (press  
PREVIOUS until the Main Menu appears), press Menu [F6] | Program [F4].  
gld18.bmp  
Figure 4-16. Menu | Program - Menu  
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Local Operation  
Menu  
4
3. Use the rotary knob to highlight “new”.  
4. Press Edit [F4]. Since “new” was highlighted, the Calibrator will create a new  
program and give a default name of NAMEnn, where nn is a two digit number. The  
Program editing screen will appear, displaying the first step.  
gld19.bmp  
Figure 4-17. Menu | Program | Edit - Menu  
5. Using the numeric keypad, enter the values for Pressure, Tolerance, Dwell time, and  
Max time, pressing ENTER after each value. The rotary knob may be used to skip  
fields.  
6. At the 0 step, enter the next pressure and the Calibrator will automatically insert a  
new pressure step.  
7. Repeat steps 5 and 6 until the test sequence is complete. The Tolerance, Dwell time  
and Max time will default to the value programmed in the first program step, and  
only need to be changed if a different value is desired for a particular step.  
8. It is often suggested that the last point in a calibration program is to vent the pressure  
to atmosphere. This can be achieved by selecting the VENT function key as the  
pressure set point.  
Note  
You can use the vent as a set-point at any point in the program. The dwell  
and max time function with vent just as they would at a controlled set-point.  
9. When all steps have been entered, press PREVIOUS to return to the Named  
programs screen. See section, Chapter 4, Changing the Name of a Program, section  
for creating a user-defined program name.  
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Users Manual  
Automatically Generating a Program  
For the Calibrator to automatically generate a program, the user must input the first  
set-point pressure, the last set-point pressure, and the number of steps in between, as well  
as the dwell time, max time and tolerance common to all set-points.  
1. Ensure that the units, limits, and control parameters are set to their desired values.  
2. The program is entered from the Program Menu. From the Main Menu (press  
PREVIOUS until the Main Menu appears), press Menu [F6] | Program [F4].  
3. Use the rotary knob to highlight “new”. If these steps are used on an existing  
program, all program steps will be deleted and replaced with the automatically  
generated program.  
4. Press Edit [F4]. Since “new” was highlighted, the Calibrator will create a new  
program and give a default name of NAMEnn where nn is a two digit number. The  
Program editing screen will appear, displaying the first step.  
5. Press Auto [F3].  
gld20.bmp  
Figure 4-18. Menu | Program | Edit | Auto - Menu  
6. Using the numeric keypad, enter the values for Start, Stop, Tolerance, Dwell time,  
Max time, number of pressure Points up, and number of pressure Points down,  
pressing ENTER after each value. The rotary knob may be used to skip fields.  
7. Press Program [F1]. The program will be generated and the display will show the  
first step.  
8. Press the Name [F6] key to edit the name of the program. See next section, Chapter 4,  
Changing the Name of a Program, for creating a user-defined program name.  
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Local Operation  
Menu  
4
Changing the Name of a Program  
1. The name of an existing program is changed from the Program Menu. From the Main  
Menu (press PREVIOUS until the Main Menu appears), press Menu [F6] |  
Program [F4]. In addition to changing the name of an existing program, a new  
program may be initiated by selecting new and performing the same steps as outlined  
to change the name of a program.  
2. Use the rotary knob to highlight the current name. (For a new program name,  
select “new”.)  
3. Press Edit [F4]. The program editing screen will appear, displaying the first step.  
4. Press Name [F6].  
gld21.bmp  
Figure 4-19. Menu | Program | Edit | Name - Menu  
5. Use the < [F4] and > [F5] keys to highlight a character.  
6. Turn the rotary knob to select the character from the character set.  
7. To correct a mistake, press Clear [F4] and return to step 5.  
8. Repeat steps 5 and 6 until the name is complete.  
9. Press Done [F6] to store the contents of the scratchpad as the new name of the  
program.  
Changing an Existing Program  
Instructions for changing an existing sequence are given below. Both manually and  
automatically generated programs may be edited.  
1. Programs are changed from the Program Menu. From the Main Menu (press  
PREVIOUS until the Main Menu appears), press Menu [F6] | Program [F4].  
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Users Manual  
2. Use the rotary knob to highlight the name of the program.  
3. Press Edit [F4]. The program editing screen will appear as a table showing all of the  
steps.  
gld22.bmp  
Figure 4-20. Menu | Program | Edit - Menu  
4. The rotary knob can be used to move through the program and highlight the value  
you wish to edit. Use the keyboard to enter a new value. This value will show up in  
the scratch pad located at the bottom of the window. Press Enter to accept the  
edited value.  
5. To add a step to the program, first move to the step after the new step. For example,  
to insert a step between steps 3 and 4, move to step 4. Press Insert [F4].  
6. To delete a step in the program, first move to the step to be deleted, then press  
Delete [F5].  
7. When all changes have been made, press PREVIOUS to return to the Named  
Programs screen. The Calibrator automatically saves the changes that were made in  
the program.  
Changing the Configuration Stored with a Program  
1. Programs are configured from the Program Menu. From the Main Menu (press  
PREVIOUS until the Main Menu appears), press Menu [F6] | Program [F4].  
2. Use the rotary knob to highlight the name of the program.  
3. Press Config [F3]. The configuration screen will appear.  
4. Press Recall [F2]. The Calibrator will be set to the configuration stored with the  
program.  
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Local Operation  
Menu  
4
gld23.bmp  
Figure 4-21. Menu | Program | Config - Menu  
5. Press PREVIOUS until the Main Menu appears.  
6. Press Setup [F2] | Limits [F1]. Change the desired parameters using the normal  
procedures.  
7. Return to the Main Menu by pressing PREVIOUS three times.  
8. Press Menu [F6] | Program [F4].  
9. Use the rotary knob to highlight the name of the program.  
10. Press Config [F3] | Save [F1]. The configuration of the Calibrator will be changed to  
the current settings and stored in the program’s configuration.  
Running a Program  
1. Programs are run from the Program Menu. From the Main Menu (press PREVIOUS  
until the Main Menu appears), press Menu [F6] | Program [F4].  
2. Use the rotary knob to highlight the name of the program.  
3. Press Run [F1]. The program run screen will appear. “Stop” will be highlighted,  
showing that the program is not currently running.  
gld24.bmp  
Figure 4-22. Menu | Program | Run - Menu  
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4. Press Run [F2]. The configuration of the Calibrator stored with the program is  
restored, the pressure set-point is set to the pressure value in the first step, and the  
Calibrator is placed in Control mode. “Run” will now be highlighted and the program  
will proceed through its steps.  
5. To pause the program, press Pause [F3]. “Pause” will now be highlighted and the  
Calibrator will continue controlling to the current set-point. The Calibrator will  
maintain control of the current set-point until further instructions from the operator.  
Press Continue [F4] to resume the program.  
6. To stop the program, press Stop [F5]. The program will stop running but the  
Calibrator will continue controlling to the current set-point.  
Menu | Test  
The Menu | Test section of the system is used to perform a number of the diagnostic and  
tuning functions that are available with the RUSKA 7350.  
gld25.bmp  
Figure 4-23. Menu | Test - Menu  
Menu | Test — Sweep Test  
The sweep function can be used to automatically exercise the elastic sensing element of  
the device under test prior to performing a calibration. For the Calibrator to perform the  
sweep test, input the high and low set-point pressures, the pressure control tolerance, the  
dwell time at set-point, and the number of cycles to perform.  
1. Ensure that the units, limits, and control parameters are set to their desired values.  
2. The sweep test is entered from the Sweep Test Menu. From the Main Menu, (press  
PREVIOUS until the Main Menu appears), press Menu [F6], then Test [F5], and then  
Sweep [F2].  
3. Enter the high and low pressure points, the control tolerance, dwell time, and the  
number of cycles.  
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Local Operation  
Menu  
4
gld26.bmp  
Figure 4-24. Menu | Test | Sweep - Menu  
4. Press Run [F2] to initiate the test.  
5. To pause the program, press Pause [F3]. Pause will now be highlighted and the  
Calibrator will continue controlling to the current set-point. The Calibrator will  
maintain control of the current set-point until further instructions from the user. Press  
Continue [F4] to resume the program.  
6. To stop the program, press Stop [F5]. The program will stop running but the  
Calibrator will continue controlling to the current set-point.  
Menu | Test — Self Test  
The Calibrator can perform electrical and pneumatic self test to assist in trouble shooting  
potential problems. Please refer to Chapter 6, Maintenance, for more details.  
Note  
In order to perform a pneumatic self test, the supply port must be connected  
to a properly set supply pressure and the test port not open to atmosphere.  
For absolute units, a vacuum supply must also be connected to the  
exhaust port.  
Menu | Test — Remote Test  
The Menu | Test | Remote section of the system is used to perform a number of the  
diagnostic functions on the remote interface. It can be used to display the transmitted and  
received messages that are sent across the interface. This can be a powerful tool to assist  
in identifying the source of communication problems.  
The Menu | Test | Remote menu displays information from the IEEE-488 interface.  
Pressing the Serial 1 [F2] or Serial 2 [F3] keys will display information from the  
serial ports.  
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gld27.bmp & gld28.bmp  
Figure 4-25. Menu | Test | Remote - GPIB Menu & Menu | Test | Remote | Serial 1 - Menu  
Menu | Test — Shop1  
The Menu | Test | Shop1 menu of the system is used to display the current status of the  
various valve positions in the system. This menu is primarily used for diagnostics and  
will be discussed further in Chapter 6, Maintenance.  
gld29.bmp  
Figure 4-26. Menu | Test | Shop1 - Menu  
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Local Operation  
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4
Menu | Display  
The Menu | Display is used to conveniently monitor most of the sensor output parameters.  
It is primarily used for troubleshooting.  
gld30.bmp  
Figure 4-27. Menu | Display - Menu  
Menu | Display — Blank  
This is used as a screen saver in the RUSKA 7350.  
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Chapter 5  
Remote Operation  
Remote Operation  
The RUSKA 7350 can be operated remotely by a computer. Three interfaces are  
supported; IEEE-488, RS-232, and RS-485. All three interfaces support Standard  
Commands for Programmable Instruments (SCPI).  
The IEEE-488 interface additionally supports emulation of a Single Channel Interface  
Panel (Models 6005-701 and 6005-761). The IEEE-488 interface conforms to the  
following standards.  
ANSI/IEEE Std 488.1-1987  
ANSI/IEEE Std 488.2-1987  
SCPI 1991.0  
IEEE Standard Digital Interface for Programmable  
Instrumentation  
IEEE Standard Codes, Formats, Protocols, and Common  
Commands  
Standard Commands for Programmable Instruments  
Capabilities  
IEEE-488  
The following identification codes define the interface capabilities of the RUSKA 7350.  
Their meaning is described in the IEEE-488 standard.  
SH1  
AH1  
T5  
Source Handshake, Complete Capability  
Acceptor Handshake, Complete Capability  
Talker  
L3  
Listener  
SR1  
RL1  
PP0  
DC1  
DT0  
C0  
Service Request, Complete Capability  
Remote-Local, Complete Capability  
Parallel Poll, No Capability  
Device Clear, Complete Capability  
Device Trigger, No Capability  
Controller, No Capability  
The optional IEEE-488 interface is installed next to the processor board. The interface is  
identified by the IEEE-488 standard connector on the back panel of the unit.  
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Note  
Do not change any jumpers or switch settings on the IEEE-488 interface  
board. The IEEE-488 address is set by the Menu Setup Remote screen.  
RS-232  
The RS-232 interface supports standard serial operation from a computer to a single  
RUSKA 7350. RS-232 supports the IEEE-488.2 and SCPI commands. The RUSKA 7350  
allows the following port setups.  
Baud Rate:  
Data Bits:  
Parity:  
1200, 2400, 9600, or 19200  
7 or 8  
Even, Odd, or None  
1 or 2  
Stop Bits  
Handshaking  
XON/XOFF  
The RS-232 connection is a DB-9P connector found on the back panel of the RUSKA  
7350. It is located on the processor board directly above the DB-25S connector. The  
following pins are used; all other pins are reserved.  
Pin #  
Direction  
In  
Signal  
RXD  
TXD  
GND  
RTS  
2
3
5
7
Receive Data  
Transmit Data  
Ground  
Out  
——  
Out  
Request to Send  
Remote/Local Operation  
In local mode, the RUSKA 7350 is operated manually through the front panel. Chapter 4,  
Local Operation, covers local operation. The RUSKA 7350 always powers up in the local  
mode. In remote mode, the RUSKA 7350 is operated by a computer connected to an  
interface. Most functions that can be performed in local mode can also be performed  
remotely.  
Remote mode does not automatically disable local operation. The remote interface may  
be active while local operations are being done. In cases where full remote control is  
required the following methods may be used.  
1. Issue a Local Lockout (LLO) interface message via the IEEE-488 interface.  
The RUSKA 7350 will disable the local keyboard until the Go To Local (GTL)  
interface message is received or the REN (Remote Enable) line is unasserted. This  
method cannot be used on the serial interfaces.  
2. Issue the SCPI command “SYSTEM:KLOCK O” to lock the local keyboard.  
The RUSKA 7350 will disable the local keyboard until the command  
“SYSTEM:KLOCK OFF” is received.  
3. Issue the SCPI command “DISPLAY:ENABLE OFF” or “DISPLAY:TEXT  
<string>”. These commands will disable the local display in addition to locking the  
keyboard. The command “DISPLAY:ENABLE ON” will restore the local display  
and keyboard operation.  
Local operation may also be restored by powering the RUSKA 7350 off and back on.  
5-2  
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Remote Operation  
Configuration  
5
Configuration  
The remote interface is configured using the local interface before the remote is  
connected. The parameters needed varies with the interface used.  
IEEE-488  
RS-232  
RS-485  
Address, Protocol  
Baud Rate, Data Bits, Parity, Stop Bits  
Address, Baud Rate, Data Bits, Parity, Stop Bits  
To configure the remote interface follow these steps:  
1. The remote interface is configured from the Setup Remote Menu. From the Main  
Menu (press Prev. until the Main Menu appears) press Menu [F6] Setup [F2]  
Remote [F4].  
2. Use the knob to highlight the desired parameter.  
3. Use the numeric keypad to enter the address. The ENTER key must be pressed to  
change any parameter.  
4. Repeat steps 2 and 3 to set all parameters needed.  
Device Messages  
SCPI Command Format  
SCPI mnemonics have two forms: long and short. The short form is all in capital letters.  
The long form is the entire mnemonic. Commands may use either the short form or the  
entire long form. No other forms are accepted. SCPI ignores case: uppercase and  
lowercase are equivalent.  
A SCPI command is made by following the command tree as presented in the command  
summary. Each level adds a mnemonic to the command separated by colons. Mnemonics  
enclosed in square brackets are optional and may be omitted.  
Some mnemonics are followed by an optional numeric suffix. If omitted, the suffix  
defaults to 1.  
Multiple commands may be placed in a single message separated by semicolons. Each  
command starts at the same level of tree where the last command stopped unless the  
command starts with a colon. The first command in a message and any commands  
starting with a colon start of the root of the command tree. IEEE 488.2 commands may  
occur between SCPI commands without affecting the tree level.  
Command parameters are separated from the command name by one or more spaces.  
Multiple parameters are separated by commas. SCPI accepts numeric parameters with  
optional sign, decimal point, and exponent. OFF is equivalent to zero and ON is  
equivalent to one. Floating point numbers are rounded to the nearest integer for  
commands accepting integer values only.  
A message is terminated by a Line Feed (hexadecimal 0A). Carriage Returns, Tabs, and  
other control characters are ignored.  
SCPI Response Format  
Only commands ending in a question mark have responses. Multiple values from a single  
command are separated by commas. Responses from different commands in the same  
message are separated by semi-colons. The response message is terminated by a Line  
Feed (hexadecimal 0A).  
Integer responses are returned as one or more digits. Boolean values (ON and OFF values)  
are always returned as numbers with zero for OFF and one for ON. Floating point values  
are returned in the format “+d.ddddddddE+dd”.  
5-3  
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RUSKA 7350  
Users Manual  
ANSI/IEEE 488.2-1987 Command Summary  
*CLS  
*ESE?  
*ESE <number>  
*ESR?  
*IDN?  
Clear Status  
Event Status Enable Query  
Event Status Enable  
Event Status Register  
Identification  
*OPC?  
*OPC  
*RST  
Operation Complete Query (Returns 1)  
Operation Complete  
Reset  
*SRE?  
*SRE <number>  
*STB?  
Service Request Enable Query  
Service Request Enable  
Status Byte Query  
*TST?  
*WAI  
Self-Test Query  
Wait (No operation)  
SCPI Command Summary  
The current value associated with a SCPI command may be read by appending a question  
mark to the command. For example CALC:LIM:UPP? will return the current upper  
pressure limit.  
MEASure  
[:PRESsure]?  
:POSITION?  
returns current pressure reading  
returns pump position (%)  
CALCulate  
:LIMit  
:LOWer <number>  
get/set low pressure limit  
get/set slew rate limit  
get/set high pressure limit  
get/set auto-vent limit  
:SLEW <number>  
:UPPer <number>  
:VENT <number>  
:TARE  
:VALue <number>  
:STATe ON/OFF  
CALibration  
get/set tare value  
set tare using current pressure  
[:PRESsure]  
:Data  
:POINts ?  
:VALue<n>?  
:VALue<n> <number>  
number of calibration constants  
returns cal constants label, value  
set calibration constant  
:CALibration  
:POINts?  
:VALue?  
:VALue<n> <number>  
:ZERO  
number of calibration points  
Nominal calibration point  
perform calibration point  
performs zero calibration  
sets zero value  
enter zero calibration mode  
returns status for cal, press, temp, ref  
start zero calibration  
:VALUE <number>  
:INITiate  
:INITiate?  
:RUN  
:STOP  
abort zero calibration  
:POSition  
:DATA <number>, <number>  
:DATA?  
sets C0, C1 position  
reads C0, C1  
:VALue <number>  
:VALue 2 <number>  
sets first calibration point  
sets second calibration point  
5-4  
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Remote Operation  
Device Messages  
5
:MODE?  
:MODE ON¦OFF¦1¦0  
calibration edit enabled?  
enable calibration edit  
(Cal. button required)  
DISP  
:ENABle ON¦OFF¦1¦0  
:TEXT <string>  
:BGRaph <number>  
turns front panel display on/off  
displays message on front panel  
sets bar graph maximum  
OUTPut  
:STATe ON¦OFF¦1¦0  
:STATe?  
:MODE MEASure¦CONTrol¦VENT  
:MODE?  
off=MEASure, on=CONTrol  
returns 0=Measure or 1=Control  
sets mode  
returns mode string  
PROGram  
:CATalog?  
returns list of defined programs  
[SELected]  
:DEFine <program block>  
Define program  
press1, toler1, dwell1, max1, press2,  
toler2, ..  
:DEFine?  
read program definition  
:DELete  
[:SELected]  
:ALL  
:NAME <program name>  
:STATe RUN|PAUSe|STOP|CONTinue  
deletes current program  
deletes all programs  
select current program  
set program state  
:STATe?  
:CONFigure  
:RECall  
`
read program state  
restore saved configuration  
save current configuration  
:SAVE  
SENSE  
[:PRESSure]  
[:RESolution] <number>  
:AUTO <boolean>|ONCE  
:MODE?  
set pressure display resolution  
return to default resolution  
returns ABSOLUTE or TARE  
:RANGE  
[:UPPer]  
returns RUSKA 7350 full scale value in  
returns 0  
units  
:LOWer  
:REFerence  
[:HEIGht] <number>  
:SGRavity <numbers>  
[SOURCE]  
[:PRESsure]  
[:LEVel]  
[:IMMediate]  
[:AMPLitude] <number>  
[:AMPLitude]?  
set head height  
set specific gravity  
sets pressure setpoint  
read pressure setpoint  
set source parameter set  
specifies output tolerance  
set slew rate  
:MODE FIXed|LIST  
:TOLerance <number>  
:SLEW <number>  
:CONTrol <number>  
set control band  
5-5  
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RUSKA 7350  
Users Manual  
:LIST  
:PRESsure <number> [,<number>]  
:POINts?  
:DWELl <number> [,<number>]  
:POINts?  
:TOLerance <number> [,<number>]  
:POINts?  
:DIRection UP|DOWN  
:COUNt <number>  
set list of pressure values  
returns number of points defined  
specifies dwell times  
returns number of dwell times  
specifies tolerances  
returns number of tolerances  
direction to go through list  
number of times to go through list  
STATus  
:OPERation  
[:EVENT]?  
read/clear operation event register  
read operation condition register  
set operation enable mask  
:CONDition?  
:ENABle <number>  
:QUEStionable  
[:EVENT]?  
:CONDition?  
:ENABle <number>  
:PRESet  
read/clear questionable event register  
read questionable condition register  
set questionable enable mask  
reset condition flags  
SYSTem  
:DATE <year>,<month>,<day>  
:ERRor?  
set system date  
returns <error#,”descr;info”>  
or 0,”No Error”  
:KLOCk ON|OFF|1|0  
:TIME <hour>,<minute>,<second>  
:VERSion?  
lock keyboard  
set system time  
returns 1991.0  
:LANGuage “6000”|”SCPI”  
:PRESet  
set interface protocol to 6000 or SCPI  
reset system  
TEST  
:ELECtronic?  
UNIT  
perform electronic self-test  
:DEFine<n> <name>,<number>  
:LENGth MM|IN  
[:PRESsure] <unit name>  
define a unit  
set length units for head height  
set pressure units  
Example SCPI Commands  
To request the current pressure reading, all of the following commands are equivalent:  
:MEASURE:PRESSURE?  
:measure:pressure?  
:MeAsUrE:pReSsUrE?  
:meas:pres?  
:measure?  
:meas?  
MEAS?  
To set the control pressure setpoint to 50, all of the following commands are equivalent:  
SOURCE:PRESSURE:LEVEL:IMMEDIATE:AMPLITUDE 50  
SOUR:PRES:LEV:IMM:AMPL 50.0  
PRESSURE +50  
PRES 50  
5-6  
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Remote Operation  
Device Messages  
5
SCPI Status Registers  
Status Byte Register (STB), Service Request Enable Register (SRE)  
Bit 7 Operation Status Summary. Set when an event enabled in OPER:ENABLE  
occurs.  
Bit 5 EBS - Event status bit. Set when an event enabled in ESE occurs.  
Bit 4 MAV - Message Available. Set when a response is ready to be sent.  
Bit 3 Questionable Status Summary. Set when an event enabled in  
QUES:ENABLE occurs.  
Bit 2 Error/Event Queue Not Empty.  
Bit 1 Always 0.  
Bit 0 Always 0.  
Standard Event Status Register (ESR), Standard Event Status Enable Register (ESE)  
Bit 7 Power-on. set at power-up.  
Bit 6 User request. Always 0.  
Bit 5 Command Error. Error in command syntax.  
Bit 4 Execution Error. Error in command execution.  
Bit 3 Device Dependent Error. Device error independent of commands.  
Bit 2 Query Error. Output queue empty when request received.  
Bit 1 Request Control. Always 0.  
Bit 0 Operation Complete. Set for *OPC command.  
Operation Status (OPER:EVENT, OPER:CONDITION, OPER:ENABLE)  
Bit 0 Calibrating. Currently performing a calibration.  
Bit 1 Settling. Waiting for control to stabilize.  
Bit 2 Ranging. Always 0.  
Bit 3 Sweeping. Always 0.  
Bit 4 Measuring. The instument is actively measuring. Always 1.  
Bit 5 Waiting for Trigger. Always 0.  
Bit 7 Correcting. Currently performing a correction. Always 0.  
Bit 8 Self-test in progress.  
Bit 9 Always 0.  
Bit 10 Always 0.  
Bit 11 Always 0.  
Bit 12 Always 0.  
Bit 13 Instrument Summary bit. Always 0.  
Bit 14 Program Running.  
Bit 15 0.  
5-7  
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RUSKA 7350  
Users Manual  
Questionable Status (QUES:EVENT, QUES:CONDITION, QUES:ENABLE)  
Bit 0 Voltage is questionable. Set when supply voltages are not within 5%.  
Bit 1 Current is questionable. Always 0.  
Bit 2 Time is questionable. Set when the clock has not been set.  
Bit 3. Temperature is questionable. Set when the oven temperature is not within range.  
Bit 5. Phase is questionable. Always 0.  
Bit 6 Modulation is questionable. Always 0.  
Bit 7 Calibration is questionable. Set when the unit has not been calibrated.  
Bit 8 Pressure is questionable. Set when the pressure is overranged.  
Bit 9 Always 0.  
Bit 10 Always 0.  
Bit 11 Always 0.  
Bit 12 Always 0.  
Bit 13 Instument Summary bit. Always 0.  
Bit 14 Command Warning. Set whenever a command ignores a parameter.  
Bit 15. 0.  
6005 Interface Panel Emulation  
The RUSKA 7350 may be configured to emulate the IEEE-488 command set of the  
RUSKA Single Channel Interface Panel (Models 6005-701 and 6005-761). See the  
Interface Panel manual for a description of the protocol. The RUSKA 7350 emulation has  
the following differences:  
1. The RUSKA 7350 is always in remote mode (Byte 0, Bit 2)  
2. All TI strip outputs read as OFF (zero) and must be written as OFF.  
3. No special functions are implemented.  
4. Any message written to the RUSKA 7350 which starts with a colon as the first  
character is interpreted as a SCPI command.  
To change from SCPI to Interface Panel Emulation via the remote interface, send the  
following message:  
:SYSTem:LANGuage “6000”  
To change from Interface Panel Emulation to SCPI via the remote interface, send the  
following message:  
:SYSTem:LANGuage “SCPI”  
5-8  
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Remote Operation  
Serial Operation  
5
Serial Operation  
The RS-232 and RS-485 ports accept the same SCPI commands as the IEEE-488 port.  
The commands can be terminated by a carriage return (hexadecimal 0D) or a line feed  
(hexadecimal 0A). The responses are always terminated by a carriage return followed by  
a line feed.  
The serial ports also support XON/XOFF. When the XOFF (hexadecimal 13) command  
is received, the RUSKA 7350 will stop transmitting. Transmission is restarted when the  
XON (hexadecimal 11) command is received.  
When only one unit is attached, the Control-C (hexadecimal 03) command will clear the  
transmit and receive buffers and disable addressing. When addressing is disabled, the unit  
will respond to commands without being addressed.  
When more than one unit is attached via the RS-485 multi-drop interface, an address  
sequence must be sent. The Data Link Escape (hexadecimal 10) command is sent  
followed by the address byte (hexadecimal 20 + unit address). This sequence will enable  
the address unit and disable all others. The Clear (hexadecimal 14) command may be  
used to clear the transmit and receive buffers without disabling addressing.  
5-9  
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RUSKA 7350  
Users Manual  
5-10  
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Chapter 6  
Maintenance  
Introduction  
Very little maintenance is normally required for the RUSKA 7350. The following  
sections discuss some of the suggested procedures.  
Observing the RUSKA 7350’s Full Scale Rating  
Instructions for observing the RUSKA 7350’s full scale rating are given below.  
1. If necessary, press PREV. several times to return the display to the main screen.  
2. Select Menu/Cal. The RUSKA 7350’s full scale pressure rating (FS:) will appear on  
the screen, in the current units of measure.  
3. Press PREV. to return to the previous screen.  
Observing the Software Version Number  
Follow the steps below to observe the RUSKA 7350’s software version number.  
1. If necessary, press PREV. several times to return the display to the Main Menu.  
2. Select Menu Setup System. The software version number will appear on the screen.  
3. Press PREV. to return to the previous screen.  
Preventive Maintenance  
Although the RUSKA 7350 is designed to be nearly maintenance free, occasional  
preventive maintenance is required to keep the RUSKA 7350’s performance optimal.  
Initiating the RUSKA 7350’s Self Test  
To test the RUSKA 7350’s hardware, software, and pneumatics, follow the steps below.  
1. If necessary, press PREV. several times to return the display to the Main Menu.  
2. Select Menu Test Self Electrical. The electronics self test will run and display the  
results.  
Removing the RUSKA 7350’s Cover  
The RUSKA 7350 should be kept clean and completely assembled at all times. Operating  
the RUSKA 7350 without its cover affects the RUSKA 7350’s thermal gradients and  
therefore reduces accuracy. If it becomes necessary to remove the RUSKA 7350’s cover,  
follow the instructions below.  
6-1  
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RUSKA 7350  
Users Manual  
WX Warning  
The RUSKA 7350 should only be opened by qualified  
electrical/mechanical service technicians. Lethal voltages are  
present and exposed in the power supply and display.  
1. Turn off the RUSKA 7350 and disconnect the power cord from the power supply.  
2. Locate the 14 screws on back and side and two screws on top of cover that secure the  
cover to the chassis.  
3. Unscrew these screws.  
4. Remove the cover.  
5. Replace the cover before resuming operation.  
Processor Battery  
The processor board uses a lithium battery to maintain time and date information. This  
battery has a varying life. If the instrument is left on 24 hours a day, it will last 5-10 years.  
If the instrument is stored, it will last one year. It is recommended to replace it every year.  
To do this, follow the instructions below:  
1. Remove cover, see Chapter 6, Removing the RUSKA 7350’s Cover section.  
2. Remove the cover of electronic chassis located at the front right corner.  
3. Remove processor card by removing one screw and rocking upward.  
4. Remove battery, a round silver object, by carefully pulling on battery while  
holding card.  
5. Plug in new battery (part no. 4-725).  
6. Reassemble in reverse order.  
7. The time and date may have to be re-entered. See subsection Chapter 4, Date/ Time  
section.  
Calibration  
To keep the RUSKA 7350 operating within its specified accuracy (Appendix A), the  
calibration procedure described below must be performed every year. Use appropriate  
DWG, such as Model 2475.  
Note  
The calibration procedure automatically generates coefficients which are  
stored in memory on the RUSKA 7350’s Control Board (Chapter 2). If  
these constants are “lost” for any reason, the calibration procedure must  
be performed, regardless of the last calibration date. If the calibration  
coefficients are known, they may be restored to the RUSKA 7350 at any  
time by “editing the coefficients” (See Chapter 6, Editing the Coefficients  
section.)  
6-2  
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Maintenance  
Calibration  
6
Calibration Instructions — Single Sensor  
To calibrate the RUSKA 7350, the user simply connects a calibration standard to the  
Calibrator’s Test port then follows the 4-step calibration procedure on the Callibrator’s  
display. The calibration procedures is a menu driven procedure that steps the user through  
the pressures that are required to calibrate each pressure range that is included in the  
Calibrator. The user generates the defined pressures utilizing an adequate standard to  
calibration the RUSKA 7350. The pressure steps will vary based on the pressure range  
and number of sub ranges that are included with the RUSKA 7350. Typically, for a single  
range instrument, the operator would be prompted to generate Atmosphere, 50%, 100%,  
and 50% of the Calibrator’s full scale operating range of a sensor (See Chapter 6,  
Observing the RUSKA 7350’s Full scale Rating). No disassembly is required and there  
are no potentiometers to tune.  
Note  
The uncertainty of the final calibration must include the uncertainty of the  
standard being used.  
Preparation  
Verify that the calibration standard is connected to the TEST PORT.  
Verify that the RUSKA 7350 has been at stable operating temperature for at  
least two hours  
Verify that the RUSKA 7350 is in Measure mode (See Chapter 4, Local  
Operation).  
Verify and set the head pressure to zero in Menu Setup User.  
(Triple range only) Verify the range to be calibrated is selected. To change press  
the Mode Range [F5].  
If desired, change the RUSKA 7350’s units of measure (See Chapter 4) to match  
those of the calibration standard.  
To go to the Calibration screen, select MENU/CAL.  
To begin the calibration process, press MENU CALIBRATE CALIBRATE. If the  
calibration access code is enables, enter it at the prompt. The Calibration, Step 1, screen  
will appear.  
Note  
To exit the calibration procedure before the calibration coefficients have  
been changed, press CANCEL any time during the procedure.  
Step 1  
Step 2  
1. To begin Step 1 of the calibration process, select Step 1. Enter the actual pressure  
applied and press ok.  
2. Wait until the zero procedure completes. When the 7350 completes Step 1, the  
Calibration, Step 2, screen will appear.  
1. To begin Step 2, use the calibration standard to Apply the mid-point pressure  
requested by the RUSKA 7350. As pressure is to be applied into the Test Port, the  
Measured pressure on the RUSKA 7350’s screen will change accordingly.  
2. When the Measured pressure stabilizes, use the RUSKA 7350’s numeric keypad and  
OK to enter the actual pressure applied by the calibration standard. Do not enter the  
Measured pressure reported by the RUSKA 7350. If necessary, use the CLEAR key  
to correct a mistake in the edit field. If the actual pressure applied is acceptable, the  
Calibration, Step 3, screen will appear.  
6-3  
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RUSKA 7350  
Users Manual  
Note  
If the actual pressure is outside of the tolerance for the requested mid-point  
pressure, Error –222 Data out of range will occur. Acknowledge this error  
by selecting OK, then re-enter the actual pressure, repeating Step 2,  
number 1, if necessary.  
Step 3  
1. To begin Step 3, use the calibration standard to Apply the high-point pressure  
requested by the 7350. The Measured pressure on the RUSKA 7350’s screen will  
change accordingly.  
2. When the Measured pressure stabilizes, use the RUSKA 7350’s numeric keypad and  
OK to enter the actual pressure reported by the calibration standard. Do not enter the  
Measured pressure reported by the RUSKA 7350. If necessary, use the CLEAR key  
to correct a mistake in the edit field. If the actual pressure applied is acceptable, the  
Calibration, Step 4, screen will appear.  
Note  
If the actual pressure applied is outside of the tolerance for the requested  
high-point pressure, Error –222 Data out of range will occur.  
Acknowledge this error by selecting OK, then re-enter the actual pressure,  
repeating Step 3, number1, if necessary.  
Step 4  
1. To begin Step 4, use the calibration standard to Apply the mid-point pressure  
requested by the RUSKA 7350. As pressure is to be applied into the Test Port, the  
Measured pressure on the RUSKA 7350’s screen will change accordingly.  
2. When the Measured pressure stabilizes, use the RUSKA 7350’s numeric keypad and  
OK to enter the actual pressure applied by the calibration standard. Do not enter the  
Measured pressure reported by the RUSKA 7350. If necessary, use the CLEAR key to  
correct a mistake in the edit field. If the actual pressure applied is acceptable, the  
Calibration complete screen will appear.  
Storing the Coefficients  
Note  
In addition to saving the calibration coefficients to the RUSKA 7350’s  
memory, the user is advised to separately record the calibration coefficients  
and store this “backup” in a safe place.  
Step 5  
Step 6  
Calibration is complete. To exit the calibration procedure without storing the calibration  
coefficients in memory, press CANCEL. To store the calibration coefficients in memory,  
select DONE.  
Press PREV. to return to the main screen.  
Once the calibration procedure is complete, the user is advised to record several pressure  
readings. If there are any significant errors at these points, then an error was probably  
made in generating one of the calibration pressures, and the calibration procedure should  
be repeated.  
6-4  
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Maintenance  
Calibration  
6
Editing the Calibration Coefficients  
If the RUSKA 7350’s memory is erased but the calibration coefficients are known, the  
user can restore the coefficients to the RUSKA 7350 by following the directions below.  
W Caution  
Never randomly adjust the calibration coefficients. Only  
qualified personnel with valid backup data should be allowed to  
edit the coefficients. If the backup coefficients are questionable,  
perform the calibration procedure in its entirety.  
1. Verify that the RUSKA 7350 is in Measure mode (Chapter 4, Local Operation).  
2. To go to the Calibration screen, select MENU CALIBRATE.  
3. To edit the calibration coefficients, press the EDIT KEY. If the calibration access  
code is enabled, enter it at the prompt.  
Note  
To exit the calibration procedure before the calibration coefficients have  
been changed, press CANCEL any time during the procedure.  
4. Use the arrow keys to highlight the coefficient.  
5. Use the numeric keypad and ENTER key to enter a new value. To correct a mistake  
in the edit field, use the CLEAR key.  
6. Repeat steps 4 and 5 until all four coefficients are correct.  
Note  
In addition to saving the calibration coefficients to the RUSKA 7350’s  
memory, the user is advised to separately record the calibration coefficients  
and store this “backup” in a safe place.  
7. To exit the editing procedure without storing the calibration coefficients in memory,  
press CANCEL. To store the calibration coefficients in memory, select OK.  
8. Press PREV. to return to the main screen.  
Once the calibration coefficients are input, the user is advised to record several pressure  
readings. If there are any significant errors at these points, then the calibration procedure  
should be performed.  
Zeroing  
The zero procedure may be performed by itself without requiring a full calibration.  
Verify ABS Mode.  
Verify that the RUSKA 7350’s test port is open to atmosphere.  
Verify that the RUSKA 7350 has been at stable operating temperature for  
at least 30 minutes.  
Verify that the RUSKA 7350 is in Measure mode.  
1. Enter the calibration screen by selecting MENU CALIBRATE.  
2. Select ZERO. The CAL button should not be pressed. If the CAL button is pressed,  
a full calibration will be selected.  
3. Use the numeric keypad to enter the atmospheric pressure at the test port. Press OK  
when the measured pressure is stable.  
4. Wait until the zero procedure completes. When the RUSKA 7350 completes the  
procedure, it will return to the CAL screen.  
6-5  
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RUSKA 7350  
Users Manual  
RUSKA 7350 Pump Lubrication  
W Caution  
The threaded portion of the RUSKA 7350 pump spindle requires  
periodic lubrication. Failure to lubricate the pump spindle can  
cause premature failure of the pump spindle and nut resulting  
in permanent pump damage.  
Approved Lubrications  
Jet Lube AP-5 Grease (part number 45-342)  
Jet Lube MP-50 Moly-paste  
Frequency of Lubrication  
The frequency of lubrication is dependant upon the frequency of instrument use. On a  
highly utilized system, the pump must be lubricated every other week. Also the pump  
should be lubricated any time that the pump shows signs of loss of lubrication along the  
face of the pump threads.  
If a pump position error occurs, along with checking the condition of the pump and pump  
over-travel limit switches, please check the pump lubrication. An inadequately lubricated  
pump can sometimes be the cause of pump-position error detection by the system  
software.  
Lubrication Procedure  
The threaded portion of the pump plunger requires periodic lubrication. The pump may  
be lubricated by either injecting the lubricant through the grease fitting located on the left  
side of the instrument or by applying the grease directly to the threads of the pump  
plunger. Either way, the power to the system should be removed when applying the  
lubrication to the pump.  
When applying grease directly to the pump, extend the pump plunger such that the  
majority of the threads are exposed. Using the lubrication provided with the system, or  
one of the lubrications noted in the approved lubrication list, disperse a generous amount  
of lubrication all along the threaded portion of the pump plunger.  
W Caution  
Only the lubrication defined on the approved lubrication list  
above can be used. Substituting this lubrication can cause  
permanent damage to the pumping mechanism.  
Fuse  
The main fuse is a 6 AMP, 250V type 3AB-Slow blow (part number 3926870).  
Cleaning  
When necessary, clean externally using a damp lint-free cloth and mild liquid detergent.  
6-6  
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Chapter 7  
Preparation for Storage and Shipment  
Disconnection Instructions  
W Caution  
The procedures given in this Chapter must be strictly adhered  
to in order to prevent damage to the instrument. Failure to  
follow these procedures will likely result in damage to the  
RUSKA 7350 during shipment. This damage is not covered by  
the carrier’s insurance.  
1. Relieve all pneumatic pressure from the RUSKA 7350.  
2. Turn the RUSKA 7350 power switch to the off position.  
3. Disconnect the power cable from the RUSKA 7350 power receptacle.  
4. Disconnect all pneumatic lines and fittings from the RUSKA 7350’s back panel.  
5. Plug all ports.  
Packing Instructions  
The instructions below must be strictly followed in order to prevent damage to the  
instrument.  
The main principle behind a successful shipment is that of minimizing shocks. This is  
accomplished by cradling the device within two boxes such that the RUSKA 7350 is  
restrained but still has resilience. The two most successful materials for this purpose are  
rubber foam and flexible polyurethane foams.  
W Caution  
Styrofoam, poured “foam in place” mixtures, and other rigid  
foams are not suitable.  
Even polyfoam or rubber foam should be cut into strips so that it will not present a large  
rigid surface to the RUSKA 7350.  
Fluke has found that corrugated cardboard boxes provide the best packing. The boxes  
sometimes arrive damaged, but the contents are usually intact. A minimum of 3 inches of  
foam with at least an N95 impact rating should separate the inner surface of the inner box  
and any portion of the RUSKA 7350. The same is true for the inner and outer box.  
W Caution  
Wood or metal boxes do not absorb shock when dropped and;  
therefore, are not recommended.  
7-1  
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7350  
Users Manual  
If the original packing and shipping materials were retained, use them for packing the  
RUSKA 7350. If the RUSKA 7350 is being packed for long-term storage (more than 30  
days), place a desiccant bag inside the unit. In general, prepare the RUSKA 7350 for  
shipment as follows.  
1. Fluke has an RMA procedure in place. Please contact the Customer Service Center to  
obtain an RMA number prior to returning any equipment to Fluke. Have the  
following information available when contacting Fluke:  
the part number,  
the serial number,  
the purchase order number,  
the billing and ship to address, and  
the buyer’s name and telephone number.  
This information plus the RMA number must be attached to the unit when it is shipped to  
Fluke Calibration. There will be a minimal charge for inspection and/or evaluation of  
returned goods.  
2. Enclose the RUSKA 7350 in plastic or any good water barrier material. Anti-static  
material is advisable.  
3. Interior Carton (size 30 x 30 x 30 inches): Cover bottom and sides with no less than  
3 inches of polyfoam. Use four strips 4" to 6" wide and 50" to 60" long. Arrange  
strips to cross each other inside carton. Cover sides and top, completely filling entire  
carton. Tape carton closed.  
4. The Exterior Carton must be a double wall of corrugated or fiberboard box. Use four  
3 x 3 x 84 inch strips of polyfoam crossing each other inside the carton. Place interior  
carton inside, making sure exterior carton is completely filled. Do not close the  
carton yet.  
5. Inside the exterior carton, include the following:  
a. Statement of the problem or service needed. Be specific. Include the name and  
telephone number of a knowledgeable technician for consultation.  
b. The part number, serial number, return address, and purchase order number.  
6. Seal the carton, using gummed tape.  
7. Address the carton to:  
FLUKE CALIBRATION  
10311 WESTPARK DRIVE  
HOUSTON, TX 77042  
USA  
8. Label the carton with the following labels: THIS SIDE UP, HANDLE WITH  
CARE, DO NOT DROP, and FRAGILE.  
7-2  
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Preparation for Storage and Shipment  
Shipping Instructions  
7
gld31.bmp  
Figure 7-1. Packing the Calibrator  
Shipping Instructions  
Fluke recommends using air freight for transportation. Surface transportation subjects the  
shipment to more frequent handling and much more intense shock.  
Again, it is essential that the procedures mentioned in the packing instructions are strictly  
adhered to in order to prevent any shipping and handling damage to the instrument.  
7-3  
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7350  
Users Manual  
7-4  
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Appendix A  
Summary of Specifications  
Accuracy  
Specifications of pressure transducer instrumentation can be divided into three categories:  
Input Specifications, General Specifications, and Performance Specifications. Each of  
these categories in turn consists of parameters which are usually specified by minimum  
and/or maximum numeric limits. Almost all of these parameters can have an effect on  
what is generally referred to as the instrument’s “accuracy.” Therefore, the accuracy of  
pressure instrumentation can be varied either beneficially or detrimentally by controlling  
the Input Specifications, operating within the General Specifications, or knowing the  
actual Performance Specifications.  
For example, if Input Specifications have not been met for the line voltage, the unit may  
not have a catastrophic failure, but errors may be present in the transducer measurement.  
As another example, if the requirement for the Pressure Source Flow Capacity has not  
been met, the RUSKA 7350 may not be able to achieve a final steady state controlled  
pressure within the settling time specification. Finally, if the RUSKA 7350 is  
commanded to a pressure outside of the Applicable Control Pressure Range, the  
nonlinearity in the pressure output may be greater than that specified.  
Performance Specifications give the user the most flexibility and control over his  
“accuracy claims.” The term accuracy is defined by ISA-S37.1 as either the ratio of the  
error to the full-scale output (%FS) or the ratio of the error to the reading (%RDG). Note  
that the definition of accuracy is not the summation of some or even all of the possible  
error source maximum limits.  
The true accuracy of an instrument is relative to the actual error introduced by the  
calibration transfer standard plus the actual error not eliminated from the instrument’s  
indicated output. Therefore, an instrument’s accuracy can be manipulated by introducing  
more or less actual error through the choice of a calibration standard; or its accuracy can  
be varied by the elimination of actual errors inherent in the instrument. For example, if an  
instrument has a known error due to being used in an attitude, or tilt, the %FS zero shift  
error can be eliminated by re-zeroing the instrument in the tilted position. Even %RDG  
sensitivity shifts can be eliminated mathematically or by controlling the attitude of the  
instrument during its calibration.  
A-1  
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RUSKA 7350  
Users Manual  
The key to eliminating an error is knowing its source and type along with its polarity and  
magnitude. Generally, the source is simple to detect and is represented by the specific  
parameter. The type is usually a function of the instrument’s design and manufacturing  
process. Within a given instrument, an error can be either random or systematic, as well  
as random or systematic within the instrument’s population. The user is free to consult  
Fluke for recommended methods of minimizing error source contributions.  
In summation, total error can and should be managed by the control of the three general  
error sources: Input Specifications, which includes the user’s chosen calibration standards;  
General Specifications, which includes the user’s chosen processes; and Performance  
Specifications, which includes the user’s chosen applications for the instrumentation. The  
parameters and value limits listed in the following specifications indicate the product  
line’s general acceptance limits and are not a report of any unit’s specific error  
contribution. Any parameter exceeding the specified limits should be considered in need  
of maintenance.  
Specifications  
Pressure Ranges  
0-6000, 0-10,000 psia  
0.01% FS  
Accuracy  
Resolution  
0.001% FS or better  
Typically 0.0075% FS  
Control Stability  
Control Response  
20 – 90 seconds controlling into a 15 cu. in. volume  
depending on full scale range and increment step size  
Control Range  
Control Volume  
Overshoot  
300 – 3000, 600 – 6000, 1000 – 10,000 psia  
3 in3 (50cc) to 35 in3 (570cc) all ranges  
0.01% of Full Scale  
Overpressure Protection  
Connections  
Relief valve set at 110% FS  
Supply Pressure port: 1/8 NPT  
Test port: 1/8 NPT  
Drive Air Supply: 1/4 NPT  
Display  
Color active matrix TFT display  
Pressure Medium  
Clean, dry, non-corrosive gas with a dew point of -40 °C  
and a particulate size <100 microns.  
(test and control gas)  
Gas Consumption  
Pressure Supply  
Zero at commanded pressure with a leak tight system  
110 to 120 psi gas pressure for controller circuit. Test gas  
supply to be 110% higher than full scale pressure (may  
require an external booster system).  
Recommended  
1 year  
Recalibration Interval  
Communications  
Dimensions  
Standard: RS-232 and IEEE-488  
19" W x 24" D x 17" H  
(49 x 61 x 43 cm)  
Weight  
120 lbs  
A-2  
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Summary of Specifications  
Accuracy  
A
Electrical Power  
100 – 120 VAC or 22 – 240 VAC, 50/60 HZ, single  
phase, 600 VA MAX (Separate part numbers for 115VAC  
and 230 VAC) Fuse 6AT-250V  
Humidity  
5 to 95% noncondensing  
Temperature  
Operating: 5 °C to 50 °C (40 °F to 122 °F)  
Storage: -20 °C to 70 °C (-4 °F to 158 °F)  
Ingress Protection  
EMC  
IP 20, Indoor use, Altitude <2000m  
EN 61326  
Electrical Safety  
Pressure Safety  
EN 61010  
Pressure equipment directive — class:  
Sound Engineering Practice (SEP)  
A-3  
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RUSKA 7350  
Users Manual  
A-4  
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Appendix B  
Summary of Error Messages  
Summary of Error Messages  
Negative error numbers are from the Standard Commands for Programmable Instruments  
(Version 1991.0).  
Table B-1. Summary of Error Messages  
Value  
0
Description and Corrective Action  
No Error.  
-103  
-104  
Invalid Separator. Check punctuation in the SCPI command.  
Data Type. The type of parameter data is incorrect. Check for numeric versus string  
data.  
-109  
-110  
-113  
-114  
-201  
Missing Parameter. No valid parameter was found for the SCPI command.  
Command Header. The command name is not valid.  
Command Unknown. The command specified does not exist.  
Header Suffix. The numeric suffix for the command name is out of range.  
Remote Required. Remote command conflicted with local interface. Return local  
interface to main Menu.  
-221  
-222  
Settings Conflict. The command could not be executed due to the current state of  
the Calibrator. Some commands cannot be executed while a program, self-test, or  
calibration is in progress.  
Out of Range. The value is not within the valid range. For pressures, check your  
high and low limits.  
-281  
-282  
-284  
Cannot create program. Program memory is full.  
Illegal Program Name. The name specified is not valid or does not exist.  
Program Currently Running. The command cannot be executed while a program is  
running.  
-285  
Program Syntax Error. The syntax of the program definition is not correct.  
B-1  
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RUSKA 7350  
Users Manual  
Value  
Description and Corrective Action  
-286  
Program Runtime Error. An error occurred while running the program. Usually the  
setpoint is out of range.  
-313  
-315  
Calibration Data Lost. The calibration data has been lost and the unit must be  
recalibrated.  
Configuration Data Lost. The configuration data has been lost. Check all parameters  
to be sure that they are correct.  
-330  
-350  
-400  
500  
501  
502  
503  
521  
538  
543  
Self Test failed. See display for more information.  
Queue Overflow. The error queue was full and messages were lost.  
Query Error. A read request was received when there was nothing to read.  
Controller Malfunction. Internal control failure.  
High Limit Exceeded. The pressure was greater than the high limit.  
Low Limit Exceeded. The pressure was less than the low limit.  
Slew Limit Exceeded. The pressure changed faster than the slew limit allowed.  
Pressure Overrange. The pressure reading is outside the range of the RUSKA 7350.  
Auto vent. The Vent Limit was exceeded and the instrument entered Vent Mode.  
Supply Pressure. The instrument is attempting to increase pressure and the  
pressure is not responding. Check main pressure supply, shop air supply, and for  
leaks.  
600  
602  
706  
707  
Factory Data Lost. Internal factory constants have been lost. Contact Fluke for more  
information.  
Model Changed. Firmware has been downloaded that is not correct. Download the  
correct firmware.  
Pump position failure. The position sensor is not detecting movement in the pump  
after the pump has been commanded to move.  
Range Switch. The current range can only be changed when the pressure reading is  
below 100 psi (700 kPa).  
B-2  
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