Omega Binding Machine CL526 User Manual

http://www.omega.com

e-mail: info@omega.com

CL526

Multifunction Indicator-Simulator

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INTRODUCTORY NOTE

A_TTENTION: T_{HIS MANUAL MUST BE REFERRED TO INSTRUMENTS WITH SERIAL NUMBER}005980 _ONWARDS

This publication contains operating instructions, as well as a description of the principles of operation, of

CL526 multifunction portable calibrator.

This information covers all models of the instrument, including the basic equipment and its options and

accessories.

This manual is a complete “USER GUIDE”, providing step-by-step instructions to operate the instrument in

each of its designed functions.

OMEGA has used the best care and efforts in preparing this book and believes the information in this

publication are accurate. The OMEGA products are subjected to continuous improvement, in order to pursue

the technological leadership; these improvements could require changes to the information of this book.

OMEGA reserves the right to change such information without notice.

No part of this document may be stored in a retrieval system, or transmitted in any form, electronic or

mechanical, without prior written permission of OMEGA Engeneering.

CL526 multifunction portable calibrator uses sophisticated analogic and digital technologies. Any

maintenance operation must be carried out by qualified personnel ONLY. We recommend to contact our

technicians for any support requirements.

The instrument is supplied by a Ni-MH rechargeable battery pack or by 100, 115, 230V 10% 50/60Hz line

supply using the special power supply module provided with the CL526 when the rechargeable battery is

ordered.

CL526 is fully tested in conformity with the directive n°89/336/CEE Electromagnetic Compatibility. OMEGA

shall not be liable in any event, technical and publishing error or omissions, for any incidental and

consequential damages, in connection with, or arising out of the use of this book.

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TABLE OF CONTENTS

GENERAL PERFORMANCE ............................................................................................................... 6

Specifications ...................................................................................................................................................7

Table of ranges and accuracy.....................................................................................................................9

1.1

1.2.1

GENERAL FEATURES...................................................................................................................... 10

Input and output flexibility...............................................................................................................................10

Self calibration................................................................................................................................................10

Keyboard........................................................................................................................................................10

Display............................................................................................................................................................10

Digital interface...............................................................................................................................................10

Scale factor function.......................................................................................................................................10

Square root function .......................................................................................................................................10

Average measurements .................................................................................................................................10

Simulation programs.......................................................................................................................................10

Case ..........................................................................................................................................................11

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

2.10

PHYSICAL DESCRIPTION ................................................................................................................ 12

FUNCTIONAL DESCRIPTION........................................................................................................... 13

Power supply..................................................................................................................................................13

Keyboard........................................................................................................................................................13

Input circuit.....................................................................................................................................................14

Microprocessor...............................................................................................................................................15

Firmware ........................................................................................................................................................15

Digital display .................................................................................................................................................15

Digital to analog converter..............................................................................................................................15

Battery charger. Operation from line source...................................................................................................16

Digital interface...............................................................................................................................................16

Resistance and Rtd measurements...........................................................................................................16

Resistance and Rtd simulation ..................................................................................................................17

Thermocouples input-output circuit............................................................................................................17

4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8

4.9

4.10

4.11

4.12

UNPACKING ...................................................................................................................................... 18

PRE-OPERATIONAL CHECK ........................................................................................................... 19

ELECTRICAL CONNECTIONS.......................................................................................................... 20

Wiring practice...............................................................................................................................................20

Thermocouple wires .......................................................................................................................................21

7.1

7.2

POWER SUPPLY ............................................................................................................................... 23

Rechargeable batteries ..................................................................................................................................23

Battery Charger ..............................................................................................................................................23

How to maximize the battery life.....................................................................................................................23

8.1

8.2

8.3

OPERATION & APPLICATIONS ....................................................................................................... 24

Power ON.......................................................................................................................................................24

Battery voltage indication ...............................................................................................................................24

Operating mode set up...................................................................................................................................24

IN - OUT mode selection ...........................................................................................................................25

Parameter or sensor selection...................................................................................................................25

Tecnical unit...............................................................................................................................................26

Decimal point position................................................................................................................................26

International Temperature Scale................................................................................................................26

Rj mode .....................................................................................................................................................26

Convert function.........................................................................................................................................26

Average readings.......................................................................................................................................27

IN-OUT data memories..............................................................................................................................27

Data memory configuration........................................................................................................................27

Data memory manual recall ..................................................................................................................28

Data memory automatic scanning.........................................................................................................28

Manual step advance.................................................................................................................................29

Automatic simulation cycle ........................................................................................................................29

9.1

9.2

9.3

9.3.1

9.3.2

9.3.3

9.3.4

9.3.5

9.3.6

9.3.7

9.3.8

9.3.9

9.3.9.1

9.3.9.2

9.3.9.3

9.3.9.4

9.3.10

9.3.10.1

9.3.10.2

9.3.11

9.3.12

9.3.13

Simulation cycle selection.....................................................................................................................29

Simulation cycle....................................................................................................................................31

Rj compensation mode check....................................................................................................................31

Scale factor program .................................................................................................................................32

Installation parameter procedure ...............................................................................................................34

Firmware version code - Serial number ................................................................................................34

9.3.13.1

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9.3.13.2

External Rj compensation.....................................................................................................................34

DIGITAL INTERFACE........................................................................................................................ 35

Digital interface data program mode...............................................................................................................35

Digital output wiring practice...........................................................................................................................35

TTL to RS 232 adapter...................................................................................................................................36

Communication protocol from CL526 to a PC ................................................................................................36

Computer request for CL526 settings.............................................................................................................40

Communication programs ..............................................................................................................................44

10.1

10.2

10.3

10.4

10.5

10.6

MAINTENANCE.................................................................................................................................. 46

Safety recommendations................................................................................................................................46

Faulty operating conditions.............................................................................................................................46

Protection fuses..............................................................................................................................................47

Storage...........................................................................................................................................................47

11.1

11.2

11.3

11.4

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GENERAL PERFORMANCE

A complete system for testing, measuring and calibrating built in a single, compact portable instrument. The portable

calibrator CL526 is a multifunction instrument designed to meet, in a modern and practical way, the needs of

instrumentation engineers, both in laboratory and field work.

Accurate, compact, rugged, easy to use; the ideal solution for measuring and simulating:

•

millivolts

volts

milliamperes (active and passive loop)

ohms

thermocouples

resistance thermometers

The CL526 has been developed using the most advanced microprocessor technology to provide high accuracy on

extended ranges and a powerful operating flexibility.

The modular firmware includes the algorithms of thermocouples and resistance thermometers in accordance with IEC,

DIN standards. IPTS68 and ITS90 linearization are memory stored and can be selected through the keyboard.

The simulation-measurement of resistance and temperature with resistance thermometer uses a special proprietary

active circuit.

An unique internal automatic Rj compensation system allows the CL526 to provide accurate input and output readings

over wide operating conditions, with a temperature range from -5°C to +50°C. Further, external compensation is

available with temperature adjustable from -50°C to +100°C.

The selection of operating functions is made on a polycarbonate thermoformed membrane keyboard which assures up to

one million operations per key.

Two thick film membrane “slidewires” are used to set the simulated signal value.

Measured and simulated values are indicated on a high quality LCD dot matrix display which provides good contrast

even in poor light conditions.

A menu-driven procedure allows for the generation of up to 60 memory stored values, or, for continuous or step ramp

values.

The instrument carries out mathematical functions for averaging unstable input signals and, in combination with scale

factor, square root calculation.

The case, made in shock-resistant ABS, is ergonomically designed for easy practical use.

The instrument is powered by four Ni-MH rechargeable batteries; an external battery charger is supplied as a standard

accessory.

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1.1

Specifications

•

IN/OUT parameters:

- mV, V, mA, Ω

- Tc type J, K, T, R, S, B, N, C, E, F, U, L, G, D

- Rtd type Pt100, Ni100 and Ni120

•

Reference junction compensation:

- automatic internal with Pt100 sensor from -5°C to +50°C;

- external with manual setting from -50°C to +100°C

•

Rj compensation drift:

± 0.015°C/°C

Rj compensation error:

±0.15°C

In/Out ranges:

see following tables

Resolution:

see following tables

Limits of error:

see following tables

Common mode rejection:

> 130 dB at 50/60 Hz

Normal mode rejection:

> 60 dB at 50/60 Hz

Temperature stability:

span

zero

± 0.005% of the reading/°C

± 0.2 µV /°C

•

Output impedance (emf output and Tc):

< 0.5 Ω with maximum current of 0.5 mA

Input impedance:

> 10 MΩ (> 1MΩ on 10 V range)

Source resistance effect:

1 µV error for 1000 Ω source resistance

Rtd and Ω simulation excitation current:

from 0.2 to 5 mA

Rtd and Ω measurement excitation current:

0.25 mA

Rtd cable compensation:

up to 100 Ω (each wire)

Shunt resistance (mA ranges):

38 Ω

Maximum resistance load:

1000 Ω ( 20mA )

Maximum input over voltage dc:

50 V (mV, V, Tc)

5 V (Rtd)

Display:

high contrast dot matrix LCD (7x5 dots per character -16 characters)

Engineering unit indications:

up to 4 characters shown directly on the display

Scale factor:

zero and span programmable within -10000 and +10000

Square root:

in combination with scale factor (display limits 0 and +2500)

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•

Calibration:

semi-automatic procedure

Power supply:

n. 4 Ni-MH batteries 1.25 V 1.2 A/h

Battery life:

4 hours with 20 mA simulation mode

12 hours on measuring mode

•

Recharge time:

10 hours with instrument switched -Off- (at 90%)

Battery voltage:

value indicated on the display

Program release identification:

release code on the display

Operating environment temperature range:

from -5°C to +50°C

Storage temperature range:

from -30°C to +60°C

Case:

ABS with internal metal coating

Dimensions:

120x60x230 mm

Weights:

net 1 Kg

gross with packing 2.5 Kg

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1.2.1

Table of ranges and accuracy

Sensor or

parameter

Total range

High accuracy

range

Resolution

Limit of error

Tc type J

Tc type K

Tc type T

Tc type R

Tc type S

Tc type B

Tc type C

Tc type G

Tc type D

Tc type U

Tc type L

Tc type N

Tc type E

Tc type F

-210 to +1200°C

-346 to +2192°F

-190 to +1200°C

-310 to +2192°F

0.1°C

0.1°F

± (0.02% of rdg +0.1°C)

± (0.02% of rdg +0.18°F)

-270 to +1370°C

-454 to +2498°F

-150 to 1300°C

-220 to 2372°F

0.1°C

0.1°F

± (0.02% of rdg +0.1°C)

±(0.02% of rdg +0.18°F)

-270 to +400°C

-454 to +752°F

-150 to 400°C

-202 to 752°F

0.1°C

0.1°F

± (0.02% of rdg +0.1°C)

±0.02% of rdg +0.18°F)

0 to +1760°C

32 to +3200°F

500 to 1700°C

932 to 3092°F

0.1°C

0.1°F

± (0.02% of rdg +0.3°C)

± (0.02% of rdg +0.154°F)

0 to +1760°C

32 to +3200°F

600 to 1760°C

1112 to 3200°F

0.1°C

0.1°F

± (0.02% of rdg +0.3°C)

± (0.02% of rdg +0.154°F)

200 to +1820°C

392 to +3308°F

1000 to 1820°C

1832 to 3308°F

0.1°C

0.1°F

±(0.02% of rdg +0.4°C)

± (0.02% of rdg +0.172°F)

0 to +2300°C

32 to +4172°F

1150 to 2300°C

2102 to 4172°F

0.1°C

0.1°F

± (0.02% of rdg +0.4°C)

± (0.02% of rdg +0.172°F)

0 to +2300°C

32 to +4172°F

300 to 2000°C

572 to 3632°F

0.1°C

1°F

± (0.02% of rdg +0.4°C)

± (0.02% of rdg +0.172°F)

0 to +2300°C

32 to +4172°F

300 to 2000°C

572 to 3632°F

0.1°C

0.1°F

± (0.02% of rdg +0.4°C)

± (0.02% of rdg +0..72°F)

-200 to +400°C

-328 to +752°F

-150 to +400°C

-238 to +752°F

0.1°C

0.1°F

±(0.02% of rdg +0.1°C)

± (0.02% of rdg +0.18°F)

-200 to +760°C

-328 to +1400°F

-200 to 760°C

-328 to 1400°F

0.1°C

0.1°F

± (0.02% of rdg +0.1°C)

± (0.02% of rdg +0.18°F)

0 to 1300°C

+32 to 2372°C

0 to 1300°C

32 to 2372

0.1°C

0.1°F

±(0.02% of rdg +0.1°C)

± (0.02% of rdg +0.18°F)

-270 to +1000°C

-454 to +1832°F

-200 to +1000°C

-328 to +1832°F

0.1°C

0.1°F

±(0.02% of rdg +0.1°C)

± (0.02% of rdg +0.18°F)

0 to 1400°C

0.1°C

±(0.02% of rdg +0.1°C)

32 to 2552°F

0.1°F

± (0.02% of rdg +0.18°F)

Pt 100 (IEC)

Pt100 (JIS)

Pt100 (US)

-200 to +850°C

-328 to +1562°F

-200 to +850°C

-328 to +1562°F

0.1°C

0.1°F

±(0.02% of rdg +0.1°C)

± (0.02% of rdg +0.18°F)

-200 to +600°C

-328 to +1562°F

-200 to +600°C

-328 to +1562°F

0.1°C

0.1°F

±(0.02% of rdg +0.1°C)

± (0.02% of rdg +0.18°F)

-200 to +850°C

0.1°C

±(0.02% of rdg +0.1°C)

-328 to +1562°F

0.1°F

± (0.02% of rdg +0.18°F)

Ni100

Ni120

-60 to +180°C

-76 to +356°F

0.1°C

0.1°F

±(0.02% of rdg +0.1°C)

± (0.02% of rdg +0.18°F)

0 to +150°C

0.1°C

±(0.02% of rdg +0.1°C)

32 to +302°F

0.1°F

± (0.02% of rdg +0.18°F)

-18.000 to +22.000

-10.00 to +100.00

-10.000 to +22.000

1 µV

± (0.01% of rdg +3µV)

-10.000 to +21.000

+21.00 to +53.00

+53.00 to +100.00

10 µV

± (0.01% of rdg +3µV)

± (0.01% of rdg +6µV)

0.0 to +1000.0

0.000 to +10.000

0.0 to +1000.0

0.000 to +10.000

100 µV

1 mV

± (0.01% of rdg +40µV)

± (0.02% of rdg +0.4mV)

0.000 to +21.000

1 µA

± (0.02% of rdg +0.5 µA)

Ω (IN)

Ω (OUT)

0.0 to 400.0 Ω

10 mΩ

± (0.02% of rdg +38mΩ)

± (0.03% of rdg +78mΩ)

Note:

•

Accuracy shown are based on tests at 23°C ±5°C for 360 days

All Input ranges: additional error ± 1 digit

Traceability chart to WECC or SIT available on request

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GENERAL FEATURES

2.1

Input and output flexibility

Advanced flexibility of performance has been achieved using microprocessor technology. Each instrument, through a

menu-driven procedure, allows measurement or simulation of mV, V, mA, Ω, or any normalized IEC, DIN and JIS

thermoelectric sensor J, K, T, R, S, B, C, U, L, N, E, F, G, D, Pt100, Ni100 and Ni120.

The microprocessor performs automatic polynomial linearization and cold junction compensation to assure high

accuracy. °C or °F selection can be made through a reconfiguration set-up.

2.2

Self calibration

The hardware-firmware design allows an automatic calibration of the instrument. A precision source (from 0 to 10V), a

0°C reference system, a standard resistor of 400Ω (±0.02% accuracy) and an ohmmeter are necessary. The calibration

procedure is protected by a security code.

2.3

Keyboard

A thermoformed metal-click tactile polycarbonate membrane keyboard, with a working life of one million operations per

key, seals the internal electronics from the surrounding environment.

Contact closure of membrane keys is acknowledged, as a coded signal, directly by the microprocessor. Two membrane

slidewires (patent pending) allow operator setting of the simulation value.

2.4

Display

The high contrast alphanumeric LCD display with dot matrix (7x5 dots per character-16 characters) allows easy readings,

even in poor light conditions, and simultaneously indicates the active function (measured or simulated), engineering unit

and type of sensor or signal.

2.5

Digital interface

A digital interface with TTL logic levels is available as standard for communication with external units.

A serial data port provides communication capability at a logic level of 0-5V (four wires: Tx, Rx, GND, Vcc).

A seven-pole cable, with mini DIN connector is supplied as a standard accessory, and a TTL to RS 232 adaptor is

available as an option.

2.6

Scale factor function

Easy menu-driven set-up to read or simulate electrical signal value in terms of engineering units. Four programmable

alphanumeric characters are available on the display to show the symbol of the parameter (i.e. mbar, %RH, %CO, etc.).

The display will indicate the scaled input/output value.

2.7

Square root function

Can be programmed during the set-up procedure (e.g. linear ranges only) to obtain direct readings of flow from a dP

transmitter signal. The display limits are 0 and +2500.

2.8

Average measurements

For the measurement of unstable input signals by a progressive averaging of a programmable number of conversions.

2.9

Simulation programs

Menu-driven set-up to generate:

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•

a continuous or step ramp output where the total time, the start point, the end point and the size of the step are

requested by the set-up procedure to run the program;

•

a manual repeat increment through keyboard;

an automatic sequence of up to 60 stored values (20 groups of 3 memories).

2.10

Case

The case is designed for easy hand held operation and transportation.

The body is injection moulded, shock-resistant ABS with internal metal coating .

A leather carrying case with shoulder strap is supplied with the instrument as a standard accessory.

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PHYSICAL DESCRIPTION

The CL526 portable calibrator consists of a rugged and compact case, a mother board with all base functions, a

daughter board for the auxiliary functions, a tactile membrane keyboard, an LCD display and a group of four nickel-

cadmium rechargeable batteries.

The internal surface of the case is metal coated to improve the characteristics of electrical noise shielding and thermal

equalization of all internal circuits.

The battery container is located on the lower part of the case, and is accessible through a cover fastened by a metal

screw.

The two halves of the case are joined together by four metal screws located on the back side.

The leather case, with shoulder strap, assures better protection of the instrument against mechanical knocks or

scratches.

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FUNCTIONAL DESCRIPTION

The CL526 portable calibrator block diagram is shown below.

External battery

charger

Ni-MH

Batteries

Reference

junction

Converters for

backligh

Power supply

Rj signals

Digital

interface

Display

D/A

(converter)

Microprocessor

Keyboard

Signal OUT

output signal

Comparator

and buffer

Gain Control

IN/OUT

Switch

IN/OUT terminals

•

power supply

microprocessor (central unit + memory)

input circuit

cold junction compensator (Rj)

LCD display

operative keyboard

digital to analog converter

4.1

Power supply

The instrument is powered, if not otherwise specified with the order, by four internal batteries that can be recharged

through an external charger module supplied as a standard accessory.

The internal batteries are Ni-MH rechargeable AA type with a nominal voltage of 1.25 V. The jumper “J1” (mounted on

the mother board), when soldered into the “B” position, allows the instrument to be powered by the four internal

rechargeable batteries or, if needed, directly from the power line. The voltage of the four batteries in series

(approximately 5V) is connected to the input of a hybrid circuit.

Pressing the <ON> key will provide the two levels of voltage for the circuitry of the instrument:

+ 5 V for logic and analog circuits

- 5 V for analog circuits

The second section, on the power supply circuit, is configured as a voltage multiplier generating for the final output stage,

a voltage of 24V dc. The above voltage levels are required to work with an external resistance of 1000Ω maximum when

in current simulation mode (20 mA - 20 V). During operative modes, other than current simulation a diode de-energizes

the hybrid circuit reducing the overall power consumption.

Recommendations and instructions to convert the instrument for a power supply with normal alkaline batteries are

described in par. 8.3.

4.2

Keyboard

The front panel is a tactile polycarbonate membrane keyboard, and has a working life of one million operations per key.

The contact closure of the membrane keyboard is acknowledged as a coded signal by the microprocessor that

recognizes the operators instructions.

Keys are interconnected on a 4x3 matrix; the microprocessor identifies directly the active key.

The values of the <L> and <L> keys (membrane slidewires) are acknowledged through the converters built in the

microprocessor chip.

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Power ON switch

OFF

Power OFF switch

IPTS68-ITS90

<L> <L>

Temperature Scale selection

Reference junction internal-external selection

Membrane slidewires to set the simulation value (to scroll the menu of input tables and

library of engineering characters).

Memory load

Parameter selection or decimal point position

Low limit setting of the simulation cycle

High limit setting of the simulation cycle

Step value setting of the simulation cycle

Simulation cycle mode selection

Soak time setting of the simulation cycle

Total time setting of the simulation cycle

In/Out memories

STORE

<←> <→>

START

END

STEP

MODE

SOAK

TIME

0, 1, 2

°C/°F

Technical unit selection

SELECT

AVERAGE

IN/OUT

CONVERT

AUTORAMP

PROGRAM X

BATTERY

ENTER

SHIFT

Parameter selection procedure

Average measurements

In/Out mode selection

Technical unit to equivalent electrical signal

Ramp program start

Scale factor program

Battery voltage indication

Memory load key

Key secondary function

LAMP

Display backlight switch (special - only on request)

4.3

Input circuit

The input circuit is based on an output buffer wired as an error amplifier. The input signal drives the negative channel ( - )

of the integrated circuit.

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The microprocessor recognizes if the D/A converter is generating a voltage signal higher or lower than the input signal

and gives correcting instructions to keep the input amplifier output on the nearest value to zero. In the above conditions

the microprocessor acknowledges the value of the input signal as equivalent to the setting of the digital to analog

converter.

Display

D/A

Ouput buffer / input amplifier

4.4

Microprocessor

The microprocessor handles all the logic functions of the instrument, performs the linearization for non linear

transducers, compensates for the reference junction temperature, drives the digital display and acknowledges all

operator instructions.

The heart of the circuit is a single-chip microcomputer that utilizes HCMOS technology to provide the low power

characteristics and high noise immunity of CMOS plus the high speed operation of HMOS.

The microcomputer provides highly sophisticated, on- chip peripheral functions including: 256 bytes of static RAM, an 8

channel analog to digital (A/D) converter (used to read the Rj value, the setting of the input comparator, the battery

package voltage and the value of the two membrane slidewires), a serial communication interface (SCI) subsystem, and

a serial peripheral interface (SPI) subsystem.

The microprocessor works with an 8-bit communication bus to the EPROM and EEPROM memories and is interfaced

with a decoder, a latch of address and an inverter-driver.

4.5

Firmware

The operating system firmware handles all logic instructions to the internal peripheral circuits and performs the

computation of the linearization equations.

The application system firmware is resident on the non-volatile memory (EEPROM) of the microprocessor chip. It is used

to store the installation parameters (autocalibration data, programs data, etc.)

4.6

Digital display

The digital display, mounted on an auxiliary board, uses high contrast LCD technology (STN liquid). Character

generation is made by a secondary dedicated microprocessor driven by two integrated circuits with signal input from the

bus of the main microprocessor.

The 16 characters are displayed with a 7x5 dot matrix. On request, CL526 can be equipped with a backlight device for

easy readings in poor light conditions.

4.7

Digital to analog converter

A 14-bit digital to analog device, driven directly by the microprocessor converts the digital value of the selected

parameter into an analog current output.

The current signal is converted into a voltage signal across a resistance strip network.

Two low thermal emf relays select one of the four available output points as a function of the selected range. The ranges

are:

-18

-0.2 to

+22 mV

+54 mV

+100,1 mV

+1001 mV

+10.010 V

Tc type R, S, B, T and the negative portion of all Tc’s

all other thermocouples

100 mV range and Rtd

1000 mV range and 0-20 mA range

10 V range

-2

-0.02 to

The above signal, through an output buffer, is sent to an integrated circuit that will generate the voltage or current

requested by the operator keyboard settings.

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1000 mV

µ P

D/A

x 1000 multipl.

100 mV

54 mV

22 mV

Keyboard

Out

4.8

Battery charger. Operation from line source

A_{TTENTION ONLY FOR USE WITH}N_I-MH B_ATTERIES.

The auxiliary module, supplied as a standard accessory, allows operation from 110-120 Vac or 220-240 Vac 50/60 Hz.

The calibrator, if needed, can be operated directly from a line source through the charger. The plastic case of the battery

charger incorporates the line voltage plug and a cable with connector for interconnection to the instrument. The charger

circuit is designed with an insulating transformer and a voltage stabilizer circuit.

The step-down transformer reduces the power line (110-120 Vac or 220-240 Vac nominal) to a value of 10 Vac. The

above voltage is full wave rectified, filtered and stabilized. The output voltage of 6,6 V is the ideal value to recharge the

internal Ni-MH batteries.

4.9

Digital interface

The digital interface circuit is essentially based on the serial communication interface subsystem (SCI) on the chip of the

microprocessor at 0 to +5V level.

An adaptor to convert TTL to RS 232 voltage levels can be obtained on request.

4.10

Resistance and Rtd measurements

The resistance thermometer (Rtd) is connected to terminals A-B-C in a 3-wire configuration (see figure on the next

page).

Two constant current generators are provided by the auxiliary module for supplying the Rtd.

The first half of “IC1” generates the negative current I = - 0.25 mA that flows from terminal B to terminal A through the

Rtd and line resistances RLA and RLB. I is kept constant by the microprocessor that controls the zero voltage level.

The second half of “IC 1”, with the associated resistors, generates the positive current I that flows from terminal C to

terminal B through line resistances RLC and RLB. Current I is kept exactly = 2 x I , so the resultant current I = I - I

flows through RLB. The input measured signal across terminals A and B is the algebraic sum of drop voltages across

Rtd and line resistances RLA and RLB. As drop voltages across RLA and RLB are exactly the same (providing that line

resistances RLA and RLB are equals), but with opposite poles, the resultant voltage across terminals A and B is

proportional to Rtd resistance variation, with no influence of line resistance.

The measured signal is then handled by the microprocessor that linearizes it and displays the corresponding value in

engineering units.

IA = - 0.25 mA

RLA

IC1/1

Rtd

IB = IC - IA = + 0.25 mA

RLB

IC = + 0.5 mA

IC1/2

RLC

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4.11

Resistance and Rtd simulation

CL526 portable calibrator is equipped with an electronic circuit for the active simulation of platinum and nickel resistance

thermometers and resistances.

It is based on the assumption that the instrument to be calibrated will supply the excitation current to the sensor; this

current must be between 0.2 and 5 mA ( typical working values ).

A lower value will generate an insufficient precision level and a higher current won’t permit the simulation of high

resistance values ( maximum voltage drop on the simulated resistance is 2 V ).

The excitation current must be applied to the pertinent terminals as indicated in par. 7.1 (simulation).

That current, flowing through resistance “ Ra“ (precision ± 0.01%) will generate a voltage drop that will be amplified and

sent to the D/A converter. The output amplifier will simulate the variation of the output resistance as a function of the

value set by the operator through the keyboard.

The connection between “+” and “-” terminals must be left open.

Ouput amplifier

Set

Out

µP

D/A

Instrument

to be

Ref

calibrated

Keyboard

Input amplifier

4.12

Thermocouples input-output circuit

A thermocouple, a temperature sensor, in its most common form consists of two wires of different composition, joined

together at one end. The two wires are joined together at two points which have different temperatures.

Tc wires

Reference Junction

emf

output

Copper wires

Measuring junction

The reference junction is also often, but less preferably, called the “cold” junction.

The temperature of the reference junction can be held constant or its variation electrically compensated in the

associated measuring instrumentation.

The second junction is the measuring junction (or “hot” junction).

A thermocouple is a practical tool for temperature sensing because it generates a measurable electrical signal.

The signal is proportional to the temperature difference between the measuring and reference junctions and is defined,

by means of tables, based on the International Practical Temperature Scales (IPTS68 or ITS90).

The portable calibrator CL526 has the reference junction located in the negative (black) terminal post. To improve

overall accuracy the terminals are designed with a very low thermal capacity.

Inside the body of the negative terminal is placed a thin film Pt100 resistance thermometer that dynamically measures,

with high accuracy, the temperature of the reference junction.

The microprocessor uses the above signal (Pt100) to adjust the input signal to compensate for the Rj temperature.

Reference junction compensation can be internal or external, depending upon the application requirements.

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UNPACKING

Remove the instrument from its packing case and remove any shipping ties, clamps, or packing materials.

Carefully follow any instructions given on any attached tags.

Inspect the instrument for scratches, dents, damage to case corner etc. which may have occurred during shipment.

If any mechanical damage is noted, report the damage to the shipping carrier and then notify OMEGA directly or its

nearest agent, and retain the damaged packaging for inspection.

A label, inside the battery container, indicates the serial number of the instrument.

Refer to this number for any inquiry for service, spare parts supply or application and technical support requirements.

OMEGA will keep a data base with all information regarding your instrument.

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PRE-OPERATIONAL CHECK

The CL526 portable calibrator is powered by four Ni-MH rechargeable batteries.

The external battery charger, supplied as standard, may be ordered for either 110/120 Vac or 220/240 Vac power

source. To modify the charger’s power voltage follow the instructions in par. 8.2.

Before using the instrument carefully verify the nominal voltage value of the charger; in case of modification do not

forget to correct the pertinent label.

The instrument should be used in environments where the temperature does not exceed the specified limits (from -5°C to

+50°C) and where the relative humidity is lower than 95%.

Out 1248.3°C Tc

In case of “low” battery condition (voltage lower than 4.6 V) the display will show the appropriate symbol. An empty

symbol means that the battery package has enough energy for about 30 minutes operation. A black symbol means that

batteries charge is below the minimum acceptable level: operation of the instrument is no longer possible. In this

condition the instrument batteries must be recharged.

WARNING

T_{HE INSTRUMENT IS SUPPLIED WITH}N_I-MH _{RECHARGEABLE BATTERIES}

DO NOT _{USE NORMAL ALKALINE BATTERIES}

A_{LKALINE BATTERIES}

WHEN CONNECTED TO A DC VOLTAGE SUPPLY UNDERTAKE AN OVERHEATING PROCESS WITH A RISK OF

EXPLOSION

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ELECTRICAL CONNECTIONS

Appropriate extension wires should be used between the thermocouple (or instrument under calibration) and the CL526

unless the thermocouple leads permit direct connection.

Make sure that both thermocouple and compensating cable are connected with the correct polarity.

If in doubt, the polarity of the compensating leads can be checked by connecting a length of lead to the indicator,

shorting the free ends of the wires together and noting that the indicator reading increases when the wires connection

is heated.

Color codes of compensating cables change in different countries. Check the appropriate table.

For Rtd connection use a cable of adequate gauge to lower the overall input resistance.

The use of a cable with a good resistance balance between conductors is also necessary.

Table A

Colour code & polarity for extension wires

Thermocouple

Wires

Colour

code

Chromel

( + ) Chromel

Purple

Constantan

( - ) Constantan

( + ) Iron

Red

Iron

White

Red

Constantan

( - )Constantan

Chromel

( + ) Chromel

Yellow

Alumel

( - )Alumel

( + ) Copper

( - ) Alloy 11

Red

Pt 13% Rh

Black

Red

Platinum

Pt 10% Rh

( + ) Copper

( - ) Alloy 11

( + ) Copper

Black

Red

Platinum

Copper

Blue

Red

Constantan

( - ) Constantan

( + ) Copper

Pt 6% Rh

Pt 30% Rh

( - ) Copper

( + ) Nicrosil

( - ) Nisil

Nicrosil

Orange

Red

Nisil

7.1

Wiring practice

Although the CL526 portable calibrator is designed to be insensitive to transients or noise, the following

recommendations should be followed to reduce ac pick up in the signal leads and to ensure good performance.

The input leads should not be run near ac line wiring, transformers and heating elements.

Input/output leads should, if possible, be twisted and shielded with the shield grounded at the end of the cable.

When shielded cables are used the shield must be connected to the positive terminal.

Above figure shows some examples of input/output wiring and connections.

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Examples of input /output wiring and connections

MEASURE CH1

SIMULATION CH1

Thermocouples, mV

mA Active loop

Thermocouples, mV

mA Active loop

+PS

+IN

+PS

+IN

-IN

RTD

mA Passive Loop

+PS

+IN

+PS

+IN

-IN

RTD

Rtd (2 wire)

+PS

+IN

+PS

+IN

-IN

RTD

Rtd ( 3 wire)

+PS

+IN

+PS

+IN

-IN

RTD

Rtd (4 wire)

NOT CONNECTED

+PS

+IN

+PS

+IN

-IN

RTD

7.2

Thermocouple wires

When making measurements where additional wires have to be connected to the thermocouple leads, care must be

exercised in selecting these wire types, not only where they are claimed to be of the same composition as the

thermocouple involved, but, also, of their "quality".

Performance results where high precision is required and in circumstances where some types of thermocouple wire

leads are added to the original installation should be reviewed carefully for the impact of the choice of the additional wire

leads.

The quality of thermocouple wire is established by the limit of error to be expected with its use.

There are three recognizable levels of quality:

- Special or Premium grade

- Standard grade

- Extension wire grade

The error limits determining the grade quality differ from thermocouple type to thermocouple type, reflecting the degree of

difficulty in maintaining the precise levels of purity of the metal used.

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The table below summarizes the error limits for Premium and Standard grades, while Extension grade wire is

characterized by limits of error exceeding those in the table.

Errors up to ±4°C may be experienced when using Extension grade thermocouple wire for J and K thermocouples.

Limit of Error of thermocouple wires

The range indicated is the temperature limit for the indicated errors Cold junction at 0 °C

Class 1

Class 2

Class 3

type T

0.5°C (-40 to +125°C)

0.004 . T (T >125°C)

-40 to +350°C

1.5°C (-40 to 375°C)

0.004.T (T >375°C)

-40 to 800°C

1.5°C (-40 to 375°C)

0.004.T (T >375°C)

-40 to 750°C

1°C (-40 to 133°C)

0.0075 . T (T >133 °C)

-40 to +350°C

2.5°C (-40 to 333 °C)

0.0075.T (T >333°C)

-40 to 900°C

2.5°C (-40 to 333 °C)

0.0075.T (T >333°C)

-40 to 750°C

1°C (-67 to 40°C)

0.015. T (T <-67°C)

-200 to 40°C

2.5°C (-167 to +40°C)

0.015.T (T <-167°C)

-200°C to 40°C

2.5°C (-167 to +40°C)

0.015.T (T <-167°C)

-----

T range

type E

T range

type J

T range

type K e N

1.5°C (-40 to 375°C)

0.004.T (T >375°C)

-40 to 1000°C

2.5°C (-40 to 333 °C)

0.0075.T (T >333°C)

-40 to 1200°C

2.5°C (-167 to +40°C)

0.015.T (T <-167°C)

-200°C to 40°C

T range

type R e S

1°C (0 to 1100°C)

1 + 0.003 (T-100)

(T >1100°C)

1.5°C (-40 to 600 °C)

0.0075.T (T >600°C)

4°C (600 to +800°C)

0.005.T (T>800°C)

T range

type B

0 to 1600°C

1.5°C (-40 to 600 °C)

0.0075.T (T >600°C)

----

1°C (0 to 1100°C)

1 + 0.003 (T-100)

(T >1100°C)

-----

4°C (600 to +800°C)

0.005.T (T>800°C)

T range

600 to 1700°C

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POWER SUPPLY

8.1

Rechargeable batteries

The CL526 portable calibrator is powered by four built-in rechargeable batteries. The instrument is shipped with an

average level of charge. After unpacking, a full charge of the batteries is recommended; connect the instrument to the

charger module (“OFF” condition) for a period of 10 hours minimum.

The Ni-MH rechargeable batteries do not suffer when used in cyclic operations.

Cyclic operation is understood as a method of operation by which the battery is continually charged and discharged.

Note that a battery, at its lower limit of discharge, risks a non uniform cell polarization: this condition makes it difficult to

recharge with the charger supplied.

Avoid leaving the instrument, with batteries totally or partially discharged, for a long time without recharging.

To charge the batteries use only the original supplied charging module. The module incorporates protection and current

limiting devices not normally found in other commercial chargers.

•

When the CL526 is connected to the battery charger module, by pressing keys <SHIFT> + <BATTERY> the

following indication will be displayed:

Battery: Line Op

If a numeric value appears, it indicates that the charger is probably faulty.

Replace the battery charger module; if the indication persists, contact OMEGA -Technical Assistance Dept.

WARNING:

AVOID _{USING ALKALINE BATTERIES ON AN INSTRUMENT SET FOR}N_I-MH _{RECHARGEABLE BATTERIES}

T_{HIS IS EXTREMELY DANGEROUS AS IT COULD CAUSE THE ALKALINE BATTERIES TO EXPLODE}

8.2

Battery Charger

The external battery charger is configured, before shipment, for a supply voltage of 110-120 Vac or 220- 240 Vac, upon

order specification. The nominal voltage value is indicated on the front label of the charger. Check for the correct input

voltage before connect it to the line.

8.3

How to maximize the battery life

Disconnect the ac mains supply when the battery is charged. Use the battery until it is completely discharged.

Leaving the ac mains supply plugged in will decrease the life of the battery.

Keeping the battery terminal clean will help maximize the operating time. Periodically wipe the positive and negative

terminals with a dry cloth.

Removing and replacing the batteries will ensure electrical contact. This should be done when using a battery that has

not been used for a long time.

Note that the operating time decreases at low temperatures.

A Ni-MH battery can be recharged about 500 times when used with the recommended instructions.

When replacing the Ni-MH batteries with a new set always replace simultaneously the four pieces.

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OPERATION & APPLICATIONS

9.1

Power ON

A_TTENTION

ALL VALUES IN THE FOLLOWING FIGURES ARE ONLY LISTED AS AN EXAMPLE

During set-up and load memory remember that the instructions of the manual related to key operation have the following

meaning:

Press the <A> key and keeping the pressure on the key, press then the <B> key.

Press in sequence, first the <A> key and then the <B> key.

•

To power the instrument press the <ON> key; the indication :

... CL526...

will appear for a few seconds.

•

The instrument runs an autodiagnostic routine for the self-checking of critical circuits and components.

A positive check will be shown with the indication

Test OK Ver 7.001

for about one second.

•

The number on the right side of the display indicates the version of the memory installed on the instrument.

The instrument is ready for measurement (IN mode) with the previously selected operating mode, as indicated below:

In 1280.6°C TcK:

Any faulty conditions that may be indicated are described in par. 8.9.

9.2

Battery voltage indication

•

To recall the battery voltage on the display press the <SHIFT> + <BATTERY> keys. The indication will be as

follows:

BAT 5.2 V IIII

•

The horizontal bar indicates the level of charge of the battery (each bar is equivalent to 25% of the full capacity)

The “low” limit of the battery voltage, for the correct operation of the instrument, is +4.6V.

Press any key to reset the operative mode.

During normal operating modes (measure or simulation), “low battery” condition will be shown as follows:

Out 1248.3°C

TcK:

The battery symbol indicates that the battery has enough energy for about 30 minutes operation.

A black symbol means that battery charge is below minimum: batteries must be recharged.

9.3

Operating mode set up

To select the required operating mode follow the procedures indicated below.

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9.3.1

IN - OUT mode selection

•

Press the <ON> key to power the instrument.

After diagnostic routine, the calibrator will be forced into the “IN” function with the active parameter previously

selected (i.e. with the indication of a measured value of +1032 °C with thermocouple type “K”).

In 1032.2°C TcK:

•

Open input terminals will cause a fluctuation of the reading up to “Underflow “ or “Overflow“ conditions.

To select the simulation mode press the <IN-OUT> key (the indication will be for example, relative to a simulated

value of 0 °C for a thermocouple type “K”).

Out

0.0°C TcK:

•

The output value can be programmed using the two membrane slidewires (<L> and <L> keys).

Keep the key pressed to cause a continuous variation of the simulated value; the speed of variation will change by

moving the pressure to the extremity of the keys.

•

By touching a point, near the two central zones, the value will increase or decrease by one single digit.

Press simultaneously <L> and <L> cursor slidewires to set the simulated value to zero.

9.3.2

Parameter or sensor selection

To select the electrical parameter or the sensor required by the application, in any measuring or simulation mode, follow

the procedure indicated below.

•

Switch the instrument -ON-

Press the <SELECT> key : the display will show one of the following menu pages:

Tc J K T U L N E

Tc R S B C F G D

Pt100 IEC JIS US

ni100 ni120 Ohm

mV V mA Xscaling

•

Press <L> or <L> cursor slidewire to select the appropriate page.

Select the required parameter or sensor, by moving left or right the flashing cursor with keys <!> or <"> (eg. to

activate the thermocouple type T choose the page and cursor position as indicated below).

Tc J K T U L N E

•

Press the <ENTER> key to memory load the selection; the instrument will return to the previous operative mode with

the new selected electrical signal or sensor.

By pressing the <SELECT> key, instead of <ENTER>, the instrument will not acknowledge any variation and return

to the previous parameter or sensor.

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9.3.3

Tecnical unit

•

To change the technical unit from °C to °F (or viceversa) follow the procedure indicated below:

Instrument operative in -Out- mode as follows:

Out

0.0°C TcK:

•

Switch the instrument -OFF-

Keep pressed the <SELECT> key and switch the instrument <ON> obtaining the following reading:

10.0°F TcK:

•

Use the same procedure to return in °C switching the instrument -Off-

Press the <SELECT> + <ON> key to read:

-12.0°C TcK:

9.3.4

Decimal point position

The decimal point position, to increase or decrease the resolution upon the application, is made by pressing keys <!> or

<">.

The instrument will automatically convert values in °C or °F from decimal to integer (and viceversa) when they are in the

range limits stated in par. 1.2.1.

On mV or V mode one of the following decimal point positions can be obtained:

0.000

0.0

0.00

0.000

Decimal conversion is not possible for the mA mode (always with three decimal points).

9.3.5

International Temperature Scale

The memory of the instrument stores both linearisations of the old International Practical Temperature Scale of 1968

(IPTS68) and the new International Temperature Scale of 1990 (ITS90).

The active linearisation is indicated on the right side of the display as follows:

IPTS 68

IPTS 90

•

The change from one scale to the other is possible directly from the keyboard:

Press <SHIFT> + <ITS> keys

9.3.6

Rj mode

The instrument can operate with an internal automatic cold junction (Rj) compensation or a remote programmable from -

50 to 100°C.

The active Rj compensation mode is indicated on the right side of the display as follows:

internal automatic

external programmable

•

To change the reference junction (Rj) compensation mode, press <SHIFT> + <Rj> keys.

9.3.7

Convert function

The "convert" function allows readings of the electrical signal equivalent to the technical unit indication. Can be used in

both -IN- or -OUT- mode for thermocouples, resistance thermometers and x scaling.

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•

To “convert” the type of indication, with the instrument operative in any of the above indicated modes, press <SHIFT>

+ <CONVERT> keys obtaining for example the following indications:

Out 100.0 °C TcK

Press <SHIFT> + <CONVERT> keys to obtain the equivalent mV indication:

Cvt 3.185

In 100.0 °C Pt

•

Press <SHIFT> + <CONVERT> keys to obtain:

Cvt 138.0

To return in technical unit indication press the <ENTER> key.

9.3.8

Average readings

The use of the “Average” function is advised with unstable input signals.

The average represents a progressive integration of the input signal.

•

To enable the “Average” mode press keys <SHIFT> + <AVERAGE>: the display will show:

Avg 128.6°C TcK :

•

To disable the “ Average “ function press again <SHIFT> + <AVERAGE> keys.

9.3.9

IN-OUT data memories

The availability of 60 slots of memory represents an important feature both either in simulation and/or in measurement

modes.

In the measurement mode it can be useful to store a number of input values pertinent to special test conditions.

In the simulation mode, the permanent availability of 60 calibration values can be useful, eg. during the calibration of the

scale of different recorders.

9.3.9.1

Data memory configuration

•

To store each memory slot press keys:

The following data is stored:

−

operative mode

measured or simulated value:

decimal point position (eg. 0.1°C or 1°C)

°C or °F technical unit

internal or external Rj mode

type of sensor or selected parameters: (eg thermocouple type)

International Temperature Scale (IPTS68 or ITS90)

60 memory slots are available.

Memory slots are split in 20 groups each of three memories for a total of 60 memories.

Each group is identified by a letter:

group A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T.

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To select the required group follow the procedure indicated below:

•

Press the <SELECT> key to obtain one of the menu pages

Press the <0> key to obtain the following indication:

Sel STO Group: A

•

Press the <L> or <L> key to select the required group number

Press the <0> key to confirm the selection and to return to the previously selected operative mode.

9.3.9.2

Data memory manual recall

To recall data memory values, select first the appropriate or required group number and press then the <0>, <1>, or <2>

key.

9.3.9.3

Data memory automatic scanning

The 60 stored items of data can be assigned, besides the group number, to a pre-programmed sequence.

The programmed sequence (a number of calibration points, or a number of data items to be supervised), includes a

linear sequence of memory starting from a "start" point and ending with a "end" point".

Memory for seven different pre-programmed sequences are available and the procedure is indicated below.

The numerical value and the parameter indicated below are an operative example eg. to memory load 5 calibration

points of a scale of a potentiometric recorder (temperature with a thermocouple type K).

1 = -50°C

2 = 0°C

3 = +100°C

4 = +200°C

5 = +500°C

As described in par. 8.6.9.1 memory store the calibration data as follows:

point 1 =

point 2 =

point 3 =

point 4 =

point 5 =

memory 0 - group A

memory 1 - group A

memory 2 - group A

memory 0 - group B

memory 1 - group B

The simulation program set-up procedure is now required.

•

Press the <SELECT> key to obtain one of the menu pages

Press the <1> key to obtain the following indication:

SEL Program # 1

•

Press the <L> an d <L> keys to enter the program number required (1 to 7)

Press the <1> key to confirm the selection of the program number and to return to the indication of one of the menu

pages

•

Press the <2> key to obtain the following indication:

Prog #1 from A1

•

Press the <L> an d <L> keys to select the "start" group/memory (eg. A1)

Press the <2> key to confirm the "start" point obtaining the following indication:

Prog #1

to A2

•

Press <s> and <t> keys to select the "end" group/memory (eg. A2)

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•

Press the <2> key to confirm the selection and to return to the menu page

Press the <AUTORAMP> key to obtain one of the following indications:

Sel : Program

•

Select with <L> and <L> keys the required "Sel:program" page

Press the <AUTORAMP> key to confirm the selection and to return to the menu page

Press the <SELECT> key to memory load the program and to return to the operative mode

9.3.9.4

Manual step advance

To run the program with manual step advance, press the <AUTORAMP> key obtaining the following indication (as per

example indicated at par. 8.6.9.3)

.A0

-50 TcK :

The symbol on the left of the display has the following meaning:

output

input

•

Press the <AUTORAMP> key to advance one step of the program. After the "end" point (n.5 in the example - B1) the

manual sequence will start again from the point 1.

•

To go back to the previous step press <ENTER> + <AUTORAMP> keys

Press the <L> or <L> or <SELECT> or <!> or <"> key to exit the program

9.3.10

Automatic simulation cycle

The instrument can be programmed for simulating two types of pre-programmed continuous or step ramp output.

By programming the incremental steps to its minimum value (0.1 or 1 degree resolution) the step ramp can be

assimilated to a continuous ramp.

Select first the technical unit (°C or °F), the type of thermocouple and then follow the procedure indicated below.

The procedure will consider a simulation in mV.

9.3.10.1 Simulation cycle selection

Two different automatic simulations identified as "Autoramp1" and "Autoramp 2" can be memory stored.

To select the required program press the <SELECT> key to obtain one of the menu pages.

•

Press the <AUTORAMP> key to obtain one of the following indications:

Sel : Autoramp 1

Sel : Autoramp 2

•

Press the <L> and <L> key to select the required Autoramp program

Press the <AUTORAMP> key to confirm the selection and to return to the menu page indication

Press the <SELECT> key to return to the operative mode

The automatic ramp cycle has the following behaviour

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End

Z step

Start

Time

Soak

Time Soak

•

To memory load the cycle parameters, follow the procedure indicated below

Select the required tecnical unit or electrical parameters

Select the required decimal point position

Press <SHIFT> + <TIME> keys to enter the cycle set-up procedure obtaining the following indication

Time 0h 0m 50s

related to the "time" in hours, minutes and seconds. The maximum setting is limited to 5 hours 33 minutes 20 seconds

(20.000 seconds)

•

Press the <START> key to obtain the following indication:

Start

0.0mV

•

Press the <L> and <L> cursors to set the "Start" level of the cycle

Press <ENTER>+<START> keys to memory store the new value

Press the <END> key to obtain the following indication:

End

100.0mV

•

Press <L> and <L> cursors to set the "end" level of the cycle

Press <ENTER>+<END> keys to memory store the new value

Press the <STEP> key to obtain the following indication:

Step

1.0mV

•

Press <L> and <L> cursors to set the size of each individual step. To have a continuous ramp set the minimum

possible value (e.g. = 0.1)

•

Press <ENTER>+<STEP> keys to memory store the new value

Press the <TIME> key to obtain the following indication:

Time 0h 0m 50s

•

Press <L> and <L> cursors to set the required ramp time - max. 5h-33m-20s (20000 seconds)

Press <ENTER>+<TIME> keys to memory store the new value

A setting of 0h-0m-00s allows a manual step advance each time the <AUTORAMP> key is pressed.

Press the <SOAK> key to read the following indication:

Soak 0h 0m 50s

•

Press <L> and <L> cursors to set the waiting time (or soak time). If the setting is 0h-0m-0s the waiting or soak time

is excluded

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•

Press <ENTER>+<SOAK> keys to memory store the new value

Press the <MODE> key to obtain one of the following indications:

Mode 1

Mode +

^ ramp

1 ramp

single cycle program

repeated cycling program

single cycle program

repeated rise ramp program.

•

Press the <L> or <L> key to select the required program type.

Press <ENTER> + <MODE> keys to memory store the new selection.

Press the <!> or <"> key to exit the set-up procedure.

9.3.10.2 Simulation cycle

•

Press the <SELECT> key to obtain one of the menu pages.

Press the <AUTORAMP> key to obtain one of the two following indications:

Sel : Autoramp 1

Sel : Autoramp 2

•

Press <L> or <L> key to select the required program.

Press the <AUTORAMP> to memory store the selection and to return to the menu page.

Press the <SELECT> key to return to the normal operative mode.

To run the automatic simulation cycle press the <AUTORAMP> key

The display indicates the actual cycle position as shown below:

Prg

18.0mV

•

On the repeated cycling to stop the program press <SHIFT> + <AUTORAMP> keys.

9.3.11

Rj compensation mode check

The internal/external reference junction compensation is only enabled for temperature measurement or simulation with

thermocouples.

•

During both simulation or measuring mode to check the type of reference junction mode previously installed press the

<SELECT> key to enter the type of sensor or parameter selection menu page.

•

Press the <IN/OUT> key to obtain the following indication:

RJ :

22.8°C int

The above reading indicates that the instrument is preset with an internal automatic reference junction compensation.

The temperature indication is the value measured by the precision thin film resistance thermometer placed inside the

In/Out terminal. If, instead of the code "int" the indication

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RJ :

0.0°C ext

is displayed, it means that an external reference junction compensation has been selected for a temperature of 0.0°C

(programmable from -50°C to +100°C).

The reference junction compensation mode can be reprogrammed as indicated in par. 8.5.6. The external reference

junction compensation value can be programmed as indicated in par. 8.5.13.2.

9.3.12

Scale factor program

The “scale factor” mode is a method to read or to simulate electrical signals values in terms of engineering units.

The example explains the procedure of installing the “scale factor” function for the calibration of a potentiometric recorder

with a scale from 0.0 mbar to 400.0 mbar corresponding to the required electrical linear input signal.

•

Press <SHIFT> + <PROGRAM X> keys to enter the "Scale Factor" set-up procedure. The display will indicate the low

end of the scale eg. in mbar.

LO:

0.0 Prog

•

Press one of the <!> or <"> keys if a decimal point shift is required.

Press the <L> or <L> keys to adjust to the required value.

Press the <ENTER> key to load in the memory the value and to advance the program one step: the display will

indicate the full scale value of the technical unit (eg. mbar).

HI:

400.0 Prog

•

Press the <L> or <L> keys to adjust the full scale value.

Press the <ENTER> key to load in the memory the value: the display will indicate one of the menu pages as follows:

Type : 0-1000 mV

Type : 0-100 mV

Type : 0-10 V

Type :

1-5 V

Type : 0-400

Type : 4-20 mA

Type : 0-20 mA

•

Select, through <L> or <L> keys, the required page and

press the <ENTER> key to memory load the needed parameter. The display will indicate one of the two following

pages:

Mode :

Linear

Square

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•

Press the <L> or <L> key to select the required page.

Press the <ENTER> key to memory load the selection.

The program will advance to the next step with the indication :

WORD:

or from a previous set-up eg.

WORD:

mbar

This procedure allows the setting of four alphanumeric characters as a symbol of the measured or simulated parameter.

Library of ch aract ers

....

7 8 O P g

....

! 6 9 N Q f i

" 5 : M R e j

# 4 ; L S d K

$ 3 < k T c l

% 2 = J U b m

& 1 > I V a n

' 0 ? H W \ o

( / @ G X _ P

) . A F Y ^ q

* - B E Z ] r

. .

.. ..

+ , C D [

•

By pressing keys <!> or <"> the needed character, identified by being underlined, will be activated.

Press <L> or <L> keys to scroll the internal library of characters and symbols and select the pertinent one. (i.e. by

a proper setting you can obtain words as indicated below)

WORD:

% RH

psi

hPa

If the application does not require a dedicated symbol, but the display of the electrical parameter (i.e. mV, mA, Ω), recall

on the display the four blank spaces.

WORD:

_ _ _ _

•

With a random display indication remember that the four blank spaces will be settable, through single digit setting, by

pressing the <L> key on its higher side, for a few seconds.

•

Press the <ENTER> key to load in the memory the symbol.

The “scale factor” mode will be activated as follows:

Press the <SELECT> key to obtain one of the menu pages.

Move the flashing cursor to the “X scaling” position

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•

Press the <ENTER> key to memory load the selection

The display will indicate the scaled input/output value.

Out

105.8 mbar

9.3.13

Installation parameter procedure

•

To enter this procedure press the <ENTER> + <ON> keys

The display will indicate as shown below (the indicated numerical value is only an example).

CAL? 65388 N=0

•

To exit from the procedure, in any of the following steps switch the instrument -Off-.

9.3.13.1 Firmware version code - Serial number

From the above step of the procedure it is possible to view the software version code .

•

Press the <IN/OUT> key to obtain the following indication:

Ver2.000 # 65535

The reading on the display indicates that the instrument is equipped with a memory release code 2.000.

The above information is extremely useful to understand the update status of the instrument and to simplify information

exchange with OMEGA engineers during repair or service operations.

The second number on the right side of the display is the Serial Number of the instrument.

•

Press any key to exit the procedure with the following indication:

CAL? 65388 N=0

•

Switch the instrument -OFF- to end the procedure.

9.3.13.2 External Rj compensation

To enter the External Rj compensation set-up start with the instrument switched -Off- and press <ENTER> + <ON> keys

to obtain the following indication:

CAL? 65388 N=0

•

Press the <AUTORAMP> key to obtain:

RJ :

0.0°C ext

•

Set, with <L> and <L> keys, the temperature of the external Rj compensation (adjustable from -50°C to +100°C).

Press the <AUTORAMP> key to memory load the new temperature value of reference junction compensation.

To end this procedure switch the instrument -Off-

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DIGITAL INTERFACE

The CL526 portable calibrator is equipped with a digital interface. The interface circuit is essentially based on the serial

communication interface subsystem (SCI) on the chip of the microprocessor. The output voltage levels are TTL at 0 to +5

An optional adaptor to convert the voltage level from 0 to +5V to RS232 levels can be supplied on request. This adaptor

is required to interface the CL526 with a Personal Computer.

10.1

Digital interface data program mode

•

To enter the procedure, press the <ENTER> + <ON> keys. The display will indicate:

CAL? 65388 N=0

•

To enter the program mode press the <2> key;

Baud Rate 19200

The numerical value of the “baud rate” can be one of the following : 19200, 9600, 4800, 2400, 1200, 600, 300

•

Select, with the <L> or <L> key the “baud rate” used by the receiver unit and transmission lines.

Press the <2> key to memory load the baud rate.

The display will indicate:

ID-Name :

The number represents the address code assigned to the instrument.

Press the <L> or <L> key to select a number from 00 to 99.

Press the <2> key to memory load the programmed value.

The display will return to the original indication:

•

CAL? 65388 N=0

•

To exit the procedure press the <OFF> key.

10.2

Digital output wiring practice

The wiring to the digital output signals is made through a mini DIN connector mounted on the lower end of the case.

The pertinent connections are indicated below.

ground

5 V

Female miniDIN connector

(case mounted - external view)

For easy interconnections a miniDIN connector with cable (cat. EE420123) con be supplied on request. The conductors

color codes can change with different supplier; please check before using.

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6 5 4

1 2

Front view

LINDY

brown

red

green

gray

purple

blue

orange

yellow

CINCH

black

green

blue

pin 1 :

pin 2 :

pin 3 :

pin 4 :

pin 5 :

pin 6 :

pin 7 :

pin 8 :

gray

yellow

white

red

brown

10.3

TTL to RS 232 adapter

The cat. BB530001 TTL to RS232 adaptor consists of a cable to which are connected a male mini DIN connector (for the

CL526) and a DB 25 connector, that contains the electrical circuitry (for the PC).

The basic circuit and connections are as follows:

TTL to RS 232 converter

+ 5 V

10 µF, 16 V

IBM - PC

10 µF, 16 V

CL526

16 10

Rx IBM

Tx IBM

Ground

IBM

ICL 232

TSC 232

+ 5 V

10 µF, 16 V

Mini-Din

10.4

Communication protocol from CL526 to a PC

The exchange of information when a CL526 is interconnected with a PC are as follows:

COMPUTER REQUEST

Computer

CL526

Tx IDNAME

Rx IDNAME

Tx IDNAME

Proceed if name acknoledged

If not, do not answer

Tx Instruction

Rx Instruction

Tx Instruction

Tx char

Rx DATA 1

Rx char

Tx DATA 1

Tx char

Rx DATA 2

Rx char

Tx DATA 2

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Tx char

Rx DATA 3

Rx char

Tx DATA 3

Tx char

Rx DATA 4

Rx char

Tx DATA 4

Tx char

Rx CHKSUM

Rx char

Tx CHKSUM

IDNAME, Instruction, DATA 1, DATA 2, DATA 3, DATA 4 and CHKSUM are 8-bit values (1 byte)

Notes

Instruct DATA 1

DATA 2

DATA 3

DATA 4

Actual value

24 display(actual) lin(actual)

Val Hi(actual)

Val Lo(actual)

STO 0 Group A 164

STO 0 Group A 165

STO 1 Group A 165

STO 1 Group A 166

STO 2 Group A 166

STO 2 Group A 167

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group B 168

STO 0 Group B 169

STO 1 Group B 169

STO 1 Group B 170

STO 2 Group B 170

STO 2 Group B 171

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group C 172

STO 0 Group C 173

STO 1 Group C 173

STO 1 Group C 174

STO 2 Group C 174

STO 2 Group C 175

Display (0)

Display( 1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group D 176

STO 0 Group D 177

STO 1 Group D 177

STO 1 Group D 178

STO 2 Group D 178

STO 2 Group D 179

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group E 180

STO 0 Group E 181

STO 1 Group E 181

STO 1 Group E 182

STO 2 Group E 182

STO 2 Group E 183

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group F 184

STO 0 Group F 185

STO 1 Group F 185

STO 1 Group F 186

STO 2 Group F 186

STO 2 Group F 187

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group G 188

STO 0 Group G 189

STO 1 Group G 189

STO 1 Group G 190

STO 2 Group G 190

STO 2 Group G 191

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group H 192

STO 0 Group H 193

STO 1 Group H 193

STO 1 Group H 194

Display (0)

Display (1)

Lin (0)

Lin (1)

Value Hi (0)

Value Hi (1)

Value Lo (0)

Value Lo (1)

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STO 2 Group H 194

STO 2 Group H 195

Display (2)

Lin (2)

Value Hi (2)

Value Lo (2)

STO 0 Group I 196

STO 0 Group I 197

STO 1 Group I 197

STO 1 Group I 198

STO 2 Group I 198

STO 2 Group I 199

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group J 200

STO 0 Group J 201

STO 1 Group J 201

STO 1 Group J 202

STO 2 Group J 202

STO 2 Group J 203

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group K 204

STO 0 Group K 205

STO 1 Group K 205

STO 1 Group K 206

STO 2 Group K 206

STO 2 Group K 207

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group L 208

STO 0 Group L 209

STO 1 Group L 209

STO 1 Group L 210

STO 2 Group L 210

STO 2 Group L 211

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group M 212

STO 0 Group M 213

STO 1 Group M 213

STO 1 Group M 214

STO 2 Group M 214

STO 2 Group M 215

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group N 216

STO 0 Group N 217

STO 1 Group N 217

STO 1 Group N 218

STO 2 Group N 21£

STO 2 Group N 219

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group O 220

STO 0 Group O 221

STO 1 Group O 221

STO 1 Group O 222

STO 2 Group O 222

STO 2 Group O 223

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group P 224

STO 0 Group P 225

STO 1 Group P 225

STO 1 Group P 226

STO 2 Group P 226

STO 2 Group P 227

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group Q 228

STO 0 Group Q 229

STO 1 Group Q 229

STO 1 Group Q 230

STO 2 Group Q 230

STO 2 Group Q 231

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group R 232

STO 0 Group R 233

STO 1 Group R 233

STO 1 Group R 234

Display (0)

Display (1)

Lin (0)

Lin (1)

Value Hi (0)

Value Hi (1)

Value Lo (0)

Value Lo (1)

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STO 2 Group R 234

STO 2 Group R 235

Display (2)

Lin (2)

Value Hi (2)

Value Lo (2)

STO 0 Group S 236

STO 0 Group S 237

STO 1 Group S 237

STO 1 Group S 238

STO 2 Group S 238

STO 2 Group S 239

Display (0)

Display (1)

Display (2)

Lin (0)

Lin (1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

STO 0 Group T 240

STO 0 Group T 241

STO 1 Group T 241

STO 1 Group T 242

STO 2 Group T 242

STO 2 Group T 243

Display (0)

Display(1)

Display (2)

Lin (0)

Lin(1)

Lin (2)

Value Hi (0)

Value Hi (1)

Value Hi (2)

Value Lo (0)

Value Lo (1)

Value Lo (2)

RAMP 1

128

129

130

131

Time Hi (1)

Stop Hi (1)

Lin (1)

Time Lo (1)

Stop Lo (1)

Display (1)

Mode (1)

Start Hi (1)

Step Hi (1)

Soak Hi (1)

Start Lo (1)

Step Lo (1)

Soak Lo (1)

RAMP 2

132

133

134

135

Time Hi (2)

Stop Hi (2)

Lin (2)

Time Lo (2)

Stop Lo (2)

Display (2)

Mode (2)

Start Hi (2)

Step Hi (2)

Soak Hi (2)

Start Lo (2)

Step Lo (2)

Soak Lo (2)

X SCALING

136

137

138

139

LOX Hi

Decimal point

CHAR 2

LOX Lo

Type X

CHAR 3

HiX Hi

Mode X

CHAR 4

HiX Lo

CHAR 1

VARIE

141

248

STO group

Program

Ramp

Vbat

PROGRAM

244

245

246

247

From (Prog 1) to (Prog 1)

From (Prog 3) to (Prog 3)

From (Prog 5) to (Prog 5)

From (Prog 7) to (Prog 7)

From (Prog 2) to (Prog 2)

From (Prog 4) to (Prog 4)

From (Prog 6) to (Prog 6)

display (name).AND.10hex=

display (name).AND.8 =

= Rj int

= Rj ext

10hex

= ITS68

= ITS90

display (name).AND.07hex =

= 1.9999

= 19.999

= 199.99

= 1999.9

= 19999

display (name.AND.40hex =

display (name).AND.20hex =

lin (name)

= °C

= °F

40hex

= IN

= OUT

20hex

= Tc J

= Tc K

= Tc T

= Tc U

= Tc L

= Tc N

= Tc E

= Tc R

= Tc S

= Tc B

= Tc C

= Tc F

= Tc G

= Tc D

= Pt100 (.385)

= Pt100 (.3916 JIS)

= Pt100 (.3910 OIML)

= Ni100

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= Ni120

= OHM

= 22 mV

= 100 mV

= 1000 mV

= 10 V

= 20 mA

= X scaling

Lin (name).AND.80hex =

= value OK

= error

80hex

if line (name).AND.80hex = 80hex

corresponding "Value Lo"

= under

= over

= error 7

= error 2

= error 6

= error 0

if line (name).AND.80hex = 0

value (name) = 2nd complement (16 bit) Value Hi (name).256 + Value Lo (name)

Mode =

= one ramp dual slope

= multi ramp dual slope

= one step one slope

= multi ramp one slope

Type X

= 0 - 100 mV

= 0 - 1000 mV

= 4 - 20 mA

= 0 - 400 _

= 1 - 5 V

= 0 - 10 V

Mode X

= linear

= square

STO Group selected

= A

= B

= C

...

= ...

n (max. 19)

= n (max. T)

Program

...

= Program 1

= Program 2

= ...

n (max. 7)

= n (max. Program 7)

Ramp

= Autoramp 1

= Autoramp 2

= Program

From........To........

= STO 0 Group A

= STO 1 Group A

= STO 2 Group A

= STO 0 Group B

= ...

...

n (max. 59)

= STO n Group n (max. STO 2 Group T)

Volt Vbat

= (Vbat x 2) / 51

CHKSUM ( checksum ) = DATA1 + DATA2 + DATA3 + DATA4).AND. FF

The above is useful to verify the integrity of transmitted and received data

The minimum time-out of the CL526 is 5 seconds.

10.5

Computer request for CL526 settings

Computer

CL526

Tx IDNAME

Rx IDNAME

Tx IDNAME

Proceed if name acknoledged

If not, do not answer

Tx Instruction

Rx Instruction

Tx Instruction

Tx DATA 1

Rx char

Rx DATA 1

Tx char

Tx DATA 2

Rx char

Rx DATA 2

Tx char

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Tx DATA 3

Rx char

Rx DATA 3

Tx char

Tx DATA 4

Rx char

Rx DATA 4

Tx char

Tx CHKSUM

Rx char

Rx CHKSUM

Tx char

The CL526 receives and verifies CHKSUM; when not valid, it does not accept the transmitted data

Each PC instruction for operative mode request must be followed by the CHECSUM recalculation Instruction 47 (with the

pertinent A and B values) as per the table below

Notes

Set In

Set display

Set value

Start ramp

Instr

DATA 1

Lin (actual)

Display (actual)

Value Hi (Out)

DATA 2

Value Lo (Out)

DATA 3

DATA 4

---------

TIME RAMP 1

START RAMP 1 127

127

Time Hi

Start Hi

Stop Hi

Step Hi

Lin

Time Lo

Start Lo

Stop Lo

Step Lo

Display

Soak Lo

Mode

STOP RAMP 1

STEP RAMP 1

Lin/Dis RAMP 1

SOAK RAMP 1

MODE RAMP 1

127

Soak Hi

TIME RAMP 2

START RAMP 2 127

127

Time Hi

Start Hi

Stop Hi

Step Hi

Lin

Time Lo

Start Lo

Stop Lo

Step Lo

Display

Soak Lo

Mode

STOP RAMP 2

STEP RAMP 2

Lin/Dis RAMP 2

SOAK RAMP 2

MODE RAMP 2

127

Soak Hi

LoX

HiX

DP/TYPE

MODE/Char 1

Char 1/Char 2

Char 3/Char 4

127

LoX Hi

HiX Lo

MODE

Char 1

Char 3

LoX Hi

HiX Lo

TYPE

Char 1

Char 2

Char 4

Dis/Lin STO 0 #A 127

Value STO 0 #A 127

Dis/Lin STO1 #A 127

Value STO 1 #A 127

Dis/Lin STO 2 #A 127

Value STO 2 #A 127

146

148

150

152

154

156

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

144

Dis/Lin STO 0 #B 127

Value STO 0 #B 127

Dis/Lin STO1 #B 127

Value STO 1 #B 127

Dis/Lin STO 2 #B 127

Value STO 2 #B 127

162

164

166

168

170

172

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

160

Dis/Lin STO 0 #C 127

Value STO 0 #C 127

Dis/Lin STO 1 #C 127

Value STO 1 #C 127

Dis/Lin STO 2 #C 127

Value STO 2 #C 127

178

180

182

184

186

188

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

176

Dis/Lin STO 0 #D 127

Value STO 0 #D 127

Dis/Lin STO 1 #D 127

Value STO 1 #D 127

194

196

198

200

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

192

Value Hi (1) Value Lo (1)

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Dis/Lin STO 2 #D 127

Value STO 2 #D 127

202

204

Display (2) Lin

Value Hi (2) Value Lo (2)

192

Dis/Lin STO 0 #E 127

Value STO 0 #E 127

Dis/Lin STO 1 #E 127

Value STO 1 #E 127

Dis/Lin STO 2 #E 127

Value STO 2 #E 127

210

212

214

216

218

220

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

208

Dis/Lin STO 0 #F 127

Value STO 0 #F 127

Dis/Lin STO 1 #F 127

Value STO 1 #F 127

Dis/Lin STO 2 #F 127

Value STO 2 #F 127

226

228

230

232

234

236

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

224

Dis/Lin STO 0 ## 127

Value STO 0 ## 127

Dis/Lin STO 1 ## 127

Value STO 1 ## 127

Dis/Lin STO 2 ## 127

Value STO 2 ## 127

242

244

246

248

250

252

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

240

Dis/Lin STO 0 #H 127

Value STO 0 #H 127

Dis/Lin STO 1 #H 127

Value STO 1 #H 127

Dis/Lin STO 2 #H 127

Value STO 2 #H 127

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

Dis/Lin STO 0 #I 127

Value STO 0 #I 127

Dis/Lin STO 1 #I 127

Value STO 1 #I 127

Dis/Lin STO 2 #I 127

Value STO 2 #I 127

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

Dis/Lin STO 0 #J 127

Value STO 0 #J 127

Dis/Lin STO 1 #J 127

Value STO 1 #J 127

Dis/Lin STO 2 #J 127

Value STO 2 #J 127

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

Dis/Lin STO 0 #K 127

Value STO 0 #K 127

Dis/Lin STO 1 #K 127

Value STO 1 #K 127

Dis/Lin STO 2 #K 127

Value STO 2 #K 127

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

Dis/Lin STO 0 #L 127

Value STO 0 #L 127

Dis/Lin STO 1 #L 127

Value STO 1 #L 127

Dis/Lin STO 2 #L 127

Value STO 2 #L 127

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

Dis/Lin STO 0 #M 127

Value STO 0 #M 127

Dis/Lin STO 1 #M 127

Value STO 1 #M 127

Dis/Lin STO 2 #M 127

Value STO 2 #M 127

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

Dis/Lin STO 0 #N 127

Value STO 0 #N 127

Dis/Lin STO 1 #N 127

Value STO 1 #N 127

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

100

102

104

Value Hi (1) Value Lo (1)

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Dis/Lin STO 2 #N 127

Value STO 2 #N 127

106

108

Display (2) Lin

Value Hi (2) Value Lo (2)

Dis/Lin STO 0 #O 127

Value STO 0 #O 127

Dis/Lin STO 1 #O 127

Value STO 1 #O 127

Dis/Lin STO 2 #O 127

Value STO 2 #O 127

114

116

118

120

122

124

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

112

Dis/Lin STO 0 #P 127

Value STO 0 #P 127

Dis/Lin STO 1 #P 127

Value STO 1 #P 127

Dis/Lin STO 2 #P 127

Value STO 2 #P 127

130

132

134

136

138

140

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

128

Dis/Lin STO 0 #Q 127

Value STO 0 #Q 127

Dis/Lin STO 1 #Q 127

Value STO 1 #Q 127

Dis/Lin STO 2 #Q 127

Value STO 2 #Q 127

146

148

150

152

154

156

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

144

Dis/Lin STO 0 #R 127

Value STO 0 #R 127

Dis/Lin STO 1 #R 127

Value STO 1 #R 127

Dis/Lin STO 2 #R 127

Value STO 2 #R 127

162

164

166

168

170

172

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

160

Dis/Lin STO 0 #S 127

Value STO 0 #S 127

Dis/Lin STO 1 #S 127

Value STO 1 #S 127

Dis/Lin STO 2 #S 127

Value STO 2 #S 127

178

180

182

184

186

188

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

176

Dis/Lin STO 0 #T 127

Value STO 0 #T 127

Dis/Lin STO 1 #T 127

Value STO 1 #T 127

Dis/Lin STO 2 #T 127

Value STO 2 #T 127

194

196

198

200

202

204

Display (0) Lin

Value Hi (0) Value Lo (0)

Dispaly (1) Lin

Value Hi (1) Value Lo (1)

Display (2) Lin

Value Hi (2) Value Lo (2)

192

Notes

Instr DATA 1

DATA 2

DATA 3

DATA 4

CHKSUM recalc. 47

-----------

From/To PROG 1 127

From/To PROG 2 127

From/To PROG 3 127

From/To PROG 4 127

From/To PROG 5 127

From/To PROG 6 127

From/To PROG 7 127

210

212

214

216

218

220

222

From

208

PROGRAM

RAMP

SELECT GROUP 74

PROGRAM

RAMP

Group

-----------

The computer must split a 16 bit word into 2 words of 8 bit as follows

Value Hi ( .... )

Higher 8 bit

Value Lo ( .... )

Lower 8 bit

CHKSUM =

(DATA1 + DATA2 + DATA 3 + DATA 4) .AND.7F

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10.6

Communication programs

In this paragraph are illustrated two examples of communication programs between the CL526 and an IBM or IBM

compatible PC.

Example A: (data transfer from CL526 to PC)

Set IDNAME=1 and BAUD RATE=9600 on CL526 (see chapter 8.6). Connect CL526 through adapter BB530001 (TTL-

RS232 converter), to personal computer communication port COM1.

Set CL526 in mA measurement (IN). Run the program and you will see on the computer screen the actual reading value

(once).

Example B: (PC instructions to CL526)

Set IDNAME=1 and BAUD RATE=9600 on CL526 (see chapter 8.6). Connect CL526 through adapter BB530001 (TTL-

RS232 converter), to personal computer communication port COM1.

Set the CL526 for current OUT mode; run the program and CL526 will be set automatically to 20mA.

Example A:

1Ø CHAR = Ø

2Ø IDNAME = 1

3Ø INSTRUCTION = 24

35 OPEN "COM1: 96ØØ, N,8,1,CD,CS,DS,RS" FOR RANDOM AS # 1

4Ø PRINT #1, CHR$ (IDNAME);:REM TRANSMIT IDNAME TO CL526

5Ø WHILE LOC (1) = Ø: WEND: REM WAIT RECEIVING IDNAME FROM CL526

6Ø IDNAME = ASC (INPUT$ (1, 1)): REM READ RECEIVED IDNAME FROM CL526

7Ø PRINT #1, CHR$ (INSTRUCTION);

8Ø WHILE LOC (1) = Ø: WEND

9Ø INSTRUCTION = ASC (INPUT$ (1, 1))

1ØØ PRINT #1, CHR$ (CHAR);

11Ø WHILE LOC (1) = Ø: WEND

12Ø DATA 1 = ASC (INPUT$ (1, 1))

13Ø PRINT #1, CHR$ (CHAR);

14Ø WHILE LOC (1) = Ø: WEND

15Ø DATA 2 = ASC (INPUT$ (1, 1))

16Ø PRINT #1, CHR$ (CHAR);

17Ø WHILE LOC (1) = Ø: WEND

18Ø DATA 3 = ASC (INPUT$ (1, 1))

19Ø PRINT #1, CHR$ (CHAR);

2ØØ WHILE LOC (1) = Ø: WEND

21Ø DATA 4 = ASC (INPUT$ (1, 1))

22Ø PRINT #1, CHR$ (CHAR);

231Ø WHILE LOC (1) = Ø: WEND

24Ø CHKSUM = ASC (INPUT$ (1, 1))

25Ø IF CHKSUM <> ((DATA1 + DATA2 + DATA3 + DATA4) AND &HFF) THEN PRINT "Error": END

26Ø VALUE = DATA3 * 256 + DATA4

27Ø IF VALUE > 32767 THEN VALUE =VALUE - 65536: REM 2'S COMPLEMENT

28Ø PRINT "VALUE: " ; VALUE / 1ØØ

29Ø END

Example B:

1Ø CHAR = Ø

2Ø IDNAME = 1

3Ø INSTRUCTION = 27

4Ø VALUE = 2ØØØ

5Ø VALUE$ = HEX$ (VALUE)

55 WHILE LEN (VALUE$)<4: VALUE$ ="Ø"+VALUE$: WEND

6Ø IF LEN (VALUE$) > 4 THEN VALUE$ =RIGHT$ (VALUE$,4)

65 DATA1 = VAL ("&H" + LEFT$ (VALUE$, 2))

7Ø DATA2 = VAL ("&H" +RIGHT$ (VALUE$, 2))

75 DATA3 = Ø

8Ø DATA4 = Ø

9Ø CHKSUM = (DATA1 + DATA2 + DATA3 + DATA4) AND &H7F

1ØØ REM MEMORY RELEASE PREVIOUS 4.xx1 (Example 4.ØØØ, 4.2ØØ) MUST USE

11Ø REM NEXT LINE INSTEAD LINE 9Ø OR PROGRAM DOES'NT WORK

12Ø REM CHKSUM =(DATA1 + DATA2 + DATA3 + DATA4) AND &HFF

13Ø OPEN "COM1: 96ØØ,N,8,1,CD,CS,DS,RS" FOR RANDOM AS #1

14Ø PRINT #1, CHR$ (IDNAME) ; : REM TRANSMIT IDNAME TO CL526

15Ø WHILE LOC (1) = Ø: WEND: REM WAIT RECEIVING IDNAME FROM CL526

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16Ø IDNAME = ASC (INPUT$ (1 , 1)): REM READ RECEIVED IDNAME FROM CL526

17Ø PRINT #1, CHR$ (INSTRUCTION) ;

18Ø WHILE LOC (1) = Ø : WEND

19Ø INSTRUCTION = ASC (INPUT$ (1 , 1))

2ØØ PRINT #1, CHR$ (DATA1) ;

21Ø WHILE LOC (1) = Ø : WEND

22Ø CHAR = ASC (INPUT$ (1 , 1))

23Ø PRINT #1, CHR$ (DATA2) ;

24Ø WHILE LOC (1) = Ø : WEND

25Ø CHAR = ASC (INPUT$ (1 , 1))

26Ø PRINT #1, CHR$ (DATA3) ;

27Ø WHILE LOC (1) = Ø : WEND

28Ø CHAR = ASC (INPUT$ (1 , 1))

29Ø PRINT #1, CHR$ (DATA4) ;

3ØØ WHILE LOC (1) = Ø : WEND

31Ø CHAR = ASC (INPUT$ (1 , 1))

32Ø PRINT #1, CHR$ (CHKSUM) ;

33Ø WHILE LOC (1) = Ø : WEND

34Ø CHAR = ASC (INPUT$ (1 , 1))

35Ø PRINT "Trasmitted."

39Ø END

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MAINTENANCE

The CL526 portable calibrator has been factory tested and calibrated before shipment.

The calibration should be verified and re-adjusted if the instrument is showing an error exceeding the declared

specifications or when a critical active or passive component is replaced (either at component level or at board level).

OMEGA will supply, on request, a technical reference manual, with all instructions and recommendations for service and

calibration. OMEGA engineers will give prompt support for any requests of assistance.

11.1

Safety recommendations

Primary elements (i.e. thermocouples, resistance thermometers, etc.) are normally linked to electrical potentials equal or

near to the ground potential. However, in some applications, there may be present a common mode voltage to earth.

Check for voltage between input terminals and ground, as this voltage can be transmitted to other devices connected to

the calibrator.

11.2

Faulty operating conditions

During start up, measuring and simulation modes, faulty conditions of the instrument will be announced, with coded

messages as follows:

Indicates a possible loss of data on “AUTORAMP” program or

on the manual memories.

Error Checksum 1

Error Checksum 2

Error Checksum 3

Error Checksum 4

Error Checksum 5

Error Checksum 6

Error Checksum 7

!!! ERROR 9 !!!

Indicates a possible loss of data on “PROGRAM X”.

Indicates a possible loss of data on “AUTORAMP”, “PROGRAM

X” and/or on the manual memories.

Indicates a possible loss of calibration data.

Indicates

possible loss of calibration data, and/or

“AUTORAMP” data and/or on the manual memories

Indicates a possible loss of calibration data, and/or “PROGRAM

X”data.

Indicates

possible loss of calibration data, and/or

“AUTORAMP” data, “Xscaling” and from the three manual

memories

Indicates a data writing on the EEPROM memory not verified.

When the above error codes are indicated repeat the set-up of the application parameters and/or autoramp data and/or

In-Out memories.

Indicates “underflow” conditions

- UNDER -

Indicates “overflow” conditions

+ OVER +

Indicates an environment temperature (in correspondence with

<IN/OUT> terminals) exceeding the stated limits

ERROR 2

Indicates that the load is exceeding the stated limits.

When in mA “OUT” function, the external load must not exceed

1000 Ω.

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When in mV or Tc “OUT” function the current flow must not

exceed 0.5 mA.

ERROR 6

ERROR 7

Indicates a possible error during scale factor computation.

The above indicated faulty conditions can be announced both during the autodiagnostic routine or in measure or

simulation modes.

If the faulty condition is critical for the type of application, it is recommended to re-run the pertinent set up procedure.

11.3

Protection fuses

The CL526 unit, is protected against overvoltage and overcurrent inputs, by thermal fuses. When they activate, you

should disconnect the electrical connections from the unit and switch the instrument off for about 2 minutes. The thermal

fuses will be automatically restored and you can resume your work.

11.4

Storage

If the instrument is left unused for a long time, it is recommended to remove the batteries.

Store the instrument in the original package, at a temperature from -30°C to +60°C, with R.H. less than 90%.

If the instrument has been unused for a month check the battery voltage, and charge the Ni-MH batteries for at least 12

hours.

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INDEX

Automatic simulation cycle; 29

Average measurements; 10

Average readings; 27

Keyboard; 10; 13

MAINTENANCE; 46

Manual step advance; 29

Microprocessor; 15

Battery Charger; 23

Battery charger. Operation from line source; 16

Battery voltage indication; 24

Operating mode set up; 24

OPERATION & APPLICATIONS; 24

Case; 11

Communication programs; 44

Communication protocol from CL526 to a PC; 36

Computer request for CL526 settings; 40

CONTENTS; 4

Parameter or sensor selection; 25

PHYSICAL DESCRIPTION; 12

Power ON; 24

Convert function; 26

Power supply; 13

POWER SUPPLY; 23

PRE-OPERATIONAL CHECK; 19

Protection fuses; 47

D/A converter; 15

Data memory automatic scanning; 28

Data memory configuration; 27

Data memory manual recall; 28

Decimal point position; 26

Digital display; 15

Digital interface; 10; 16; 35

Digital interface data program mode; 35

Digital output wiring practice; 35

Display; 10

Rechargeable batteries; 23

Resistance and Rtd measurements; 16

Resistance and Rtd simulation; 17

Rj compensation mode check; 31

Rj mode; 26

Safety recommendations; 46

Scale factor function; 10

Scale factor program; 32

Self calibration; 10

ELECTRICAL CONNECTIONS; 20

Simulation cycle; 31

Faulty operating conditions; 46

Firmware; 15

Firmware version code - Serial number; 34

FUNCTIONAL DESCRIPTION; 13

Simulation cycle selection; 29

Simulation programs; 10

Specifications; 7

Square root function; 10

Storage; 47

GENERAL FEATURES; 10

GENERAL PERFORMANCE; 6

Table of ranges and accuracies; 9

Tecnical unit; 26

Thermocouple wires; 21

Thermocouples input-output circuit; 17

TTL to RS 232 adaptor; 36

IN - OUT mode selection; 25

Increase the life of the battery; 23

INDEX; 48

IN-OUT data memories; 27

Input and output flexibility; 10

Input circuit; 14

UNPACKING; 18

Installation parameter procedure; 34

International Temperature Scale; 26

INTRODUCTORY NOTE; 3

Wiring practice; 20

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WARRANTY/ DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13

months from date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal one (1)

year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum

coverage on each product.

If the unit should malfunction, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department

will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA,

if the unit is found to be defective it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to

defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing,

operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit

shows evidence of having been tampered with or shows evidence of being damaged as a result of excessive corrosion;

or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions

outside of OMEGA’s control. Components which wear are not warranted, including but not limited to contact points,

fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products However, OMEGA neither assumes

responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its

products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only

that the parts manufactured by it will be as specified and free of defects. OMEGA MAKES NO OTHER WAR-

RANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSEO OR IMPUED, EXCEPT THAT OF

TITLE, AND ALL IMPLIED WARRANTlES INCLUDING ANY WARRANTY OF MERCHANTABIUTY AND RTNESS

FOR A PARTlCULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATlON OF LIABILITY: The remedies of

purchaser set forth herein ate exclusive and the total liability of OMEGA with respect to this order, whether

based on contract, warranty, negligence. Indemnification, strict liability or otherwise, shall not exceed the

purchase price of the component upon which liability is based. In no event shall OMEGA be liable for

consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a ”Basic Component”

under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on

humans. Should any Product(s) be used in or with any nuclear installation or activity, medical application, used on

humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY/DISCLAIMER

language, and additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage

whatsoever arising out of the use of the Product(s) in such a manner.

RETURN REQUESTS / INQ UIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING

ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM

OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR

number should then be marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in

transit.

FOR WARRANTY RETURNS, please has the

following information available BEFORE contacting

OMEGA:

FOR NON-WARRANTY REPAIRS, consult OMEGA for

current repair charges. Have the following information

available BEFORE contacting OMEGA:

1. P.O. number under which the product was

PURCHASED,

1. P.O. number to cover the COST of the repair,

2. Model and serial number of product, and

2. Model and serial number of the product under

warranty, and

3. Repair instructions and/or specific problems relative to

the product.

3. Repair instructions and/or specific problems

relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the

latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.

translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without prior written consent of OMEGA

ENGINEERING, INC.

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Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

TEMPERATURE

! Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies

! Wire: Thermocouple, RTD & Thermistor

! Calibrators & Ice Point References

! Recorders, Controllers & Process Monitors

! Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

! Transducers & Strain Gauges

! Load Cells & Pressure Gauges

! Displacement Transducers

! Instrumentation & Accessories

FLOW/LEVEL

! Rotameters, Gas Mass Flowmeters & Flow Computers

! Air Velocity Indicators

! Turbine/Paddlewheel Systems

! Totalizers & Batch Controllers

pH/CONDUCTIVITY

! pH Electrodes, Testers & Accessories

! Benchtop/Laboratory Meters

! Controllers, Calibrators, Simulators & Pumps

! Industrial pH & Conductivity Equipment

DATA ACQUISITION

! Data Acquisition & Engineering Software

! Communications-Based Acquisition Systems

! Plug-in Cards for Apple, IBM & Compatibles

! Datalogging Systems

! Recorders, Printers & Plotters

HEATERS

! Heating Cable

! Cartridge & Strip Heaters

! Immersion & Band Heaters

! Flexible Heaters

! Laboratory Heaters

ENVIRONMENTAL MONITORING AND CONTROL

! Metering & Control Instrumentation

! Refractometers

! Pumps & Tubing

! Air, Soil & Water Monitors

! Industrial Water & Wastewater Treatment

! pH, Conductivity & Dissolved Oxygen Instruments

M-3254/1003

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