Omega Crib Toy DP3001 User Manual

User’s Guide  
®
DP3001  
DIGITAL PANEL VOLTMETER  
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TABLE OF CONTENTS  
SAFETY CONSIDERATIONS ......................................................................................... iii  
1.0 GENERAL INFORMATION ........................................................................................ 1  
2.0 SPECIFICATIONS..................................................................................................... 1  
2.1 Analog Input ......................................................................................................... 1  
2.2 Reference Input for 3-Wire Ratio.......................................................................... 1  
2.3 Noise Rejection .................................................................................................... 1  
2.4 Accuracy at 25°C.................................................................................................. 2  
2.5 Digital Inputs......................................................................................................... 2  
2.6 Analog-to-Digital Conversion................................................................................ 2  
2.7 Display.................................................................................................................. 2  
2.8 Power ................................................................................................................... 2  
2.9 Environmental ...................................................................................................... 2  
2.10 Mechanical ........................................................................................................... 3  
3.0 MECHANICAL ASSEMBLY & INSTALLATION.......................................................... 3  
3.1 Case Dimensions ................................................................................................. 3  
3.2 Panel Mounting .................................................................................................... 4  
4.0 POWER & SIGNAL .................................................................................................... 5  
4.1 Changing Operating Voltage................................................................................ 5  
4.2 Power and Signal Connections ............................................................................ 5  
4.3  
Main Board Pin Assignments ............................................................................... 6  
4.4 Signal Inputs......................................................................................................... 8  
5.0 CONFIGURATION .................................................................................................... 9  
5.1  
Decimal Point Selection ....................................................................................... 9  
5.2 Voltage Range Selection.................................................................................... 10  
6.0 CALIBRATION.......................................................................................................... 11  
7.0 DRAWINGS.............................................................................................................. 12  
8.0 DUAL-SLOPE CONVERSION.................................................................................. 13  
i
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LIST OF FIGURES:  
Figure 3.1 DIN Case Dimensions.................................................................................. 4  
Figure 3.2 Exploded View.............................................................................................. 5  
Figure 4.1 Side View of Transformer............................................................................. 6  
Figure 4.2 Rear Terminal Hookups ............................................................................... 7  
Figure 5.1 Display Board Jumper Locations................................................................ 10  
Figure 5.2 Main Board Jumper Locations.................................................................... 11  
Figure 5.3 Solder Switch Locations............................................................................. 12  
Figure 7.1 Assembly Diagram, Main and Display Board............................................. 13  
Figure 8.1 Dual-slope Conversion Diagram ................................................................ 14  
ii  
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SAFETY CONSIDERATIONS  
This device is marked with the international Caution symbol. It is important to read  
this manual before installing or commissioning this device as it contains important  
information relating to Safety and EMC (Electromagnetic Compatibility).  
Unpacking & Inspection  
Unpack the instrument and inspect for obvious shipping damage. Do not attempt to  
operate the unit if damage is found.  
This instrument is a panel mount device protected in accordance with Class I of EN  
61010 (115/230 AC power connections). Installation of this instrument should be done by  
Qualified personnel. In order to ensure safe operation, the following instructions should  
be followed.  
This instrument has no power-on switch. An external switch or circuit-breaker shall be  
included in the building installation as a disconnecting device. It shall be marked to  
indicate this function, and it shall be in close proximity to the equipment within easy reach  
of the operator. The switch or circuit-breaker shall not interrupt the Protective Conductor  
(Earth wire), and it shall meet the relevant requirements of IEC 947-1 and IEC 947-3  
(International Electrotechnical Commission). The switch shall not be incorporated in the  
mains supply cord.  
Furthermore, to provide protection against excessive energy being drawn from the mains  
supply in case of a fault in the equipment, an over-current protection device shall be  
installed.  
The Protective Conductor must be connected for safety reasons. Check that the  
power cable has the proper Earth wire, and it is properly connected. It is not  
safe to operate this unit without the Protective Conductor Terminal connected.  
Do not exceed voltage rating on the label located on the top of the  
instrument housing.  
Always disconnect power before changing signal and power connections.  
Do not use this instrument on a work bench without its case for safety  
reasons.  
Do not operate this instrument in flammable or explosive atmospheres.  
Do not expose this instrument to rain or moisture.  
Unit mounting should allow for adequate ventilation to ensure instrument  
does not exceed operating temperature rating.  
Use electrical wires with adequate size to handle mechanical strain and  
power requirements. Install without exposing bare wire outside the connector  
to minimize electrical shock hazards.  
EMC Considerations  
Whenever EMC is an issue, always use shielded cables.  
Never run signal and power wires in the same conduit.  
Use signal wire connections with twisted-pair cables.  
Install Ferrite Bead(s) on signal wires close to the instrument if  
EMC problems persist.  
iii  
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1.0  
GENERAL INFORMATION  
This voltmeter is a 4 1/2 digit panel meter for applications which require  
a compact, quality DC voltmeter. This model uses dual-slope conversion.  
Additionally, it provides automatic zeroing before each reading and does so with  
a minimum of parts for increased reliability.  
The voltmeter has a resolution of 1 part in 19999 counts. By using an external  
DC voltage reference, any of the given ranges can be configured for 3-wire  
(common ground) ratio measurement with readout from 0 to 1.9999.  
Standard features include selectable decimal point location, display hold, test and  
blanking. Each model contains the required circuitry for full range selection and  
easy configuration.  
2.0  
SPECIFICATIONS  
2.1  
ANALOG INPUT  
Model  
Range  
Resolution  
Maximum input  
Input resistance  
Bias current  
-3  
1.9999 Vdc  
0.1 mV  
250 V rms, 350 Vp 250 V rms, 1000 Vp 250 V rms,1000 Vp  
-4  
19.999 Vdc  
1 mV  
-5  
199.99 Vdc  
10 mV  
1 Gohm  
10 pA  
1 Mohm  
1 pA  
1 Mohm  
1 pA  
Configuration  
Zero  
Span adjustment  
differential  
automatic  
5%  
2.2  
2.3  
REFERENCE INPUT FOR 3-WIRE RATIO  
Analog input range  
Reference voltage  
Load on reference  
Accuracy  
2 Vdc, 20 Vdc, 200 Vdc  
+0.5 to +2.0 V  
80 ohm (std), 100 Mohm (opt)  
99.95%  
NOISE REJECTION  
NMR, sig hi to sig lo  
56 dB at 50/60 Hz  
CMR, sig lo to ana gnd  
CMV, sig lo to ana gnd  
CMR, ac gnd to ana gnd  
CMV, ac gnd to ana gnd  
86 dB from DC to 60 Hz  
1.0 Vdc  
120 dB from DC to 60 Hz  
2100 Vp per HV test, 354 Vp per IEC 348 spacing  
1
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2.4  
ACCURACY AT 25°C  
Maximum error  
0.01% of reading 2 counts  
0.01% of reading/°C  
1 second  
Span tempco  
Step response  
Warm-up to rated accuracy  
10 minutes  
2.5 DIGITAL INPUTS Positive true referenced to DIG GND  
Input  
HOLD  
Logical 0  
0 to 0.8 V  
0 to 0.6 V  
Logical 1  
Sink  
Source  
10 µA  
20 µA  
20 µA  
2.8 to 5.0 V 0.1 mA  
2.0 to 5.0 V 1.3 mA  
2.0 to 5.0 V 1.3 mA  
LAMP TEST  
DISPLAY BLANKING 0 to 0.6 V  
2.6  
2.7  
ANALOG-TO-DIGITAL CONVERSION  
Technique  
Input integration period  
Read rate  
Dual-slope, average-value  
100 milliseconds  
2.5/second  
DISPLAY  
Digit type  
7 segments, 14.2 mm (0.56 in) height  
-1.8.8.8.8  
Symbols  
Decimal Points  
4 positions, programmable internally or  
at the rear connector  
Overrange indication  
4 least-significant digits flash  
2.8  
2.9  
POWER  
Standard AC power voltage  
AC frequency range  
Optional DC power voltage  
Power consumption  
115 or 230 Vac 15%  
49 to 440 Hz  
9-32 or 26-56 Vdc, isolated to 300 Vp  
2.4 W  
Output voltages  
+4.7 Vdc 5% at 10 mA max  
-4.6 Vdc 5% at 10 mA max  
ENVIRONMENTAL  
Operating temperature  
Storage temperature  
Relative humidity  
0 to +60°C  
-40 to +85°C  
95% RH to +40°C (non-condensing)  
2
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2.10  
MECHANICAL  
Bezel  
96 x 48 x 5.1 mm (3.78 x 1.89 x 0.20 in)  
104 mm (4.09 in)  
Depth behind bezel  
(with connector)  
Panel cutout  
Weight  
92 x 45 mm (3.62 x 1.77 in)  
400 g (14 oz)  
Case material  
D1 connector option  
(non-CE)  
D4 connector option  
(CE)  
94V-0 UL-rated polycarbonate  
PCB edge connector with a double row of  
18-pins, 3.96 mm (0.156 in) spacing between pins  
Barrier terminal strip with six #6 screw  
connections for signal and power (removes  
these inputs from D1)  
3.0  
MECHANICAL ASSEMBLY AND INSTALLATION  
3.1  
CASE DIMENSIONS  
Figure 3.1 DIN Case Dimensions  
3
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TAB  
I.D. LABEL  
CASE, TOP  
SLIDE SCREW (2)  
SLIDE CLAMP (2)  
PARALLEL BCD  
OUTPUT BOARD  
(F2N OPTION)  
SLIDE RETAINER (2)  
TERMINAL  
BLOCK  
COVER  
SIGNAL INPUT  
POWER INPUT  
LENS  
MAIN BOARD  
SPAN ADJUST  
CASE, BOTTOM  
Figure 3.2 Exploded View  
3.2  
PANEL MOUNTING  
1. Remove main board connector J1, if installed. Loosen the two clamp screws  
(with a #8 Phillips screwdriver) on the rear of case and rotate the slide  
clamps. Push the two slide retainers toward the rear of the unit and remove  
them.  
2. Working from the front of the panel, insert the meter into the panel cutout  
(refer to case dimensions shown below).  
3. Push the slide retainers onto the case to fit tightly against the panel rear.  
Rotate slide clamps back into original position and tighten clamp screws just  
enough to hold the case in place. Never over-tighten clamp screws.  
4. Reinstall any connectors and snap on the terminal block cover.  
4
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4.0  
POWER AND SIGNAL  
AC versions of the voltmeter are factory-set for 115 Vac in the USA and 230 Vac in  
Europe (using C1 option) 15% operation. DC versions are preset for 9-32 Vdc or  
26-56 Vdc operation. It is not possible to change the meter from 9-32 Vdc to  
26-56 Vdc or vice versa. Different static inverters are installed by the factory.  
Refer to Safety Considerations prior to connecting power.  
CHANGING OPERATING VOLTAGE  
4.1  
Remove power lines from the meter, then remove the meter from the case.  
Input  
Jumper Installation  
Remove W8 and W9 on the transformer  
Install W4 on the printed circuit board  
Remove W8 and W9 on the transformer  
Install W4 on the printed circuit board  
230 Vac 15% (Option C1)  
115 Vac 15% (Standard)  
Figure 4.1  
Side View of Transformer  
4.2  
POWER AND SIGNAL CONNECTIONS  
Use shielded, twisted cable for the input signal, with the shield terminated to analog  
ground at the connector. Both analog and digital ground are internally connected and  
should not be connected externally. For proper grounding, connect the low signal to  
SIG LO (signal low).  
A jumper at S3-A (Figure 5-2 Main Board) ties SIG LO to ANA GND (analog  
ground) internally.The common for digital inputs/outputs is connected to DIG GND  
(digital ground).This allows current to flow only in the digital ground and prevents IR  
drop in the analog ground that would be misread as a signal. A small voltage may  
exist between analog and digital grounds on connector J1.  
5
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(D4)  
(D1)  
Figure 4.2  
Rear Terminal Hookups  
Model  
Power  
Signal  
A
2
C
1
2
3
2
C
High  
Low  
Earth Ground  
High  
Low  
Earth Ground  
+ DC  
- DC (return)  
17  
16  
T
6
5
High  
Low  
Analog Ground  
High  
Low  
Analog Ground  
High  
Low  
Analog Ground  
High  
Low  
D1 Connector  
D4 Connector  
D1 Connector  
D4 Connector  
AC  
4
17  
16  
T
6
5
DC  
2
3
+ DC  
- DC (return)  
4
Analog Ground  
Wire Color for AC Power  
USA  
Other  
(High)  
Black  
White  
Green  
Brown  
Blue  
(Low)  
(Ground)  
Green  
6
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4.3  
MAIN BOARD PIN ASSIGNMENTS (J1 Card Edge)  
Left to right, looking at rear of case  
P1 Connection  
Standard  
A
Spare (E16)  
1
No connection  
B
No connection  
2
Spare (E18)  
C
D
Spare (E19)  
No connection  
No connection  
No connection  
3
4
E
Spare (E43)  
5
No connection  
F
1999.9 (DP4)  
6
Spare (E24)  
H
199.99 (DP3)  
7
Spare (E23)  
J
19.999 (DP2)  
8
Spare (E22)  
K
1.9999 (DP1)  
9
Spare (E25)  
L
Decimal point select  
Spare (E26)  
Spare (E27)  
–4.6 Vdc power output  
Spare (E29)  
+4.7 Vdc power output  
– Excitation voltage  
+ Reference voltage  
LAMP TEST (lights display segments)  
+ Excitation voltage  
Digital ground  
10  
M
11  
N
12  
P
13  
R
14  
S
15  
HOLD (holds last display reading)  
Analog Ground  
T
16  
U
17  
V
Spare (E32)  
BLANKING (blanks 4 least-significant digits)  
Spare (E34)  
Oscillator (100 kHz output)  
No connection  
18  
7
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4.4  
SIGNAL INPUTS  
RATIO: The reference input allows an external voltage to be used as the  
reference source for conversion. In this mode, the meter reads the ratio of the  
signal voltage to the reference voltage rather than the true value of the input.  
Signal Voltage  
Reference Voltage  
Reading in Counts =  
x 10000  
On the 20 V and 200 V ranges, the signal voltage must be scaled by 1/10 and  
1/100, respectively. For all ranges, the standard reference input impedance ratio  
is 80 ohm. For 100 Mohm, open solder switch F on the main board (Figure 5.3).  
The reference voltage must be between the limits specified, +0.5 to +2.0 V, and  
must be positive with respect to analog ground.  
HOLD: When high (or open), the A/D will free-run with equally spaced  
measurement cycles every 40,002 clock pulses. If taken low, the converter will  
complete the full measurement cycle and then hold this reading as long as HOLD  
is low. A positive pulse (greater than 300 ns) will now initiate a new measurement  
cycle, beginning with between 9,001 and 10,001 counts of auto-zero time. If the  
pulse terminates before the full measurement cycle (40,002 counts) is complete,  
it will not be recognized and the converter will simply complete the present  
measurement. An external indication that a full measurement cycle has been  
completed is that the first strobe pulse will occur 101 counts after the end of  
this cycle. Thus, if HOLD has been low for at least 101 counts, the converter is  
holding and ready to start a new measurement when pulsed high.  
BLANKING: The display may be blanked by grounding the BLANKING input.  
The blanking input must be open for normal display operation. The polarity sign  
and decimal points are not blanked, but they will flash if the displayed reading  
exceeds 19999 counts.  
8
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5.0  
CONFIGURATION  
Select the desired configurations from the following charts. Install jumpers and  
open/close solder switches as indicated. Remove all push-on jumpers not used.  
5.1  
DECIMAL POINT SELECTION  
Figure 5.1 Display Board Jumper Locations  
Alternate decimal point configuration  
Decimal Point  
S1  
using main board connector J1.  
1.9999  
19.999  
199.99  
1999.9  
A
B
C
D
Connect K to L  
Connect J to L  
Connect H to L  
Connect F to L  
9
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5.2  
VOLTAGE RANGE SELECTION  
Figure 5.2 Main Board Jumper Locations  
Solder Switches*  
Push-on Jumpers Wire Jumper  
Input  
Configuration  
2 Vdc  
20 Vdc  
200 Vdc  
Open  
J, L  
J, L  
Close  
H, I, K  
H, I, K  
H, I, K  
S2  
S4  
W10  
Install  
Remove  
Remove  
-
-
A
A
B
C
J, L  
*Refer to Figure 5.3.  
S3-A is used for signal connections. Refer to Section 4 for more information.  
10  
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Figure 5.3 Solder Switch Locations  
Solder switch F is used for reference input impedance ratio.  
Refer to Section 4 for more information.  
6.0  
CALIBRATION  
This unit was factory-calibrated with a precision voltage source. Frequent  
calibration is not necessary due to the stability and internal accuracy. If calibration  
is needed, use the following procedure.  
1. Remove the front lens. Insert a blade screwdriver under the notch at the  
bottom of the lens and gently pry it off.  
2. Short the input signal connections and verify that the display reads zero.  
3. Apply an input voltage equal to 95% of the high end of the range selected.  
4. At the front panel, adjust the Span potentiometer (shown in Figure 3.2) until  
the display reads 19000 1 count.  
11  
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7.0 DRAWINGS  
Figure 7.1  
Assembly Diagram, Main and Display Board  
12  
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8.0  
DUAL-SLOPE CONVERSION  
At the beginning of a conversion, the voltage across C is zero. The signal is  
int  
then applied to the integrator and the voltage across C rises by the formula:  
int  
T1  
E
= Esig R C  
Cint  
int int  
At the end of a fixed period of 10000 counts, T1, the counters are reset to 00000.  
The signal input is turned off and a stable reference voltage of the opposite  
polarity is now applied to the input. Since the reference voltage is constant, the  
slope, in volts/sec, during this second period, T2, is constant and independent of  
input signal levels. The time required to discharge the capacitor back to zero volts  
is then proportional to the signal voltage. The relationship between the signal  
integration time, T1, and the reference integration time, T2, can be expressed by  
the formula:  
E
T2 = E T1  
sig  
ref  
After the clock is stopped by the capacitor voltage reaching zero, a third period,  
T3, allows the circuit to auto-zero the integrator and comparator for the next  
reading. A low level on the HOLD input prevents the reset pulse from starting the  
counters.  
Figure 8.1  
Dual-slope Conversion Diagram  
13  
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NOTES  
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NOTES  
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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 one (1) year  
from the date of purchase. In addition to OMEGA’s standard warranty period, OMEGA Engineering will extend the warranty period  
for one (1) additional year if the warranty card enclosed with each instrument is returned to OMEGA.  
If the unit malfunctions, 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 having been 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 WARRANTIES  
OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL  
IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR  
PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are  
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 hu-  
mans. 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/INQUIRIES  
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 OME-  
GA’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 have 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. Purchase Order number under which the product was  
PURCHASED,  
1. Purchase Order 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.  
© Copyright 2012 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,  
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior  
written consent of OMEGA ENGINEERING, INC.  
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are Trademarks of OMEGA ENGINEERING, INC.  
PATENT NOTICE: This product is covered by one or more of the following patents: U.S. Pat. No. Des. 336,895; 5,274,577/  
CANADA 2052599; 2052600 / ITALY 1249456; 1250938 / FRANCE BREVET No. 91 12756 / SPAIN 2039150; 2048066 /  
UK PATENT No. GB2 249 837; GB2 248 954 / GERMANY DE 41 34398 C2. Other US and International Patents pending or  
applied for.  
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Where Do I Find Everything I Need for  
Process Measurement and Control?  
OMEGA…Of Course!  
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TEMPERATURE  
Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies  
Wire: Thermocouple, RTD & Thermistor  
Calibrators & Ice Point References  
Recorders, Controllers & Process Monitors  
Infrared Pyrometers  
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PRESSURE, STRAIN AND FORCE  
Transducers & Strain Gauges  
Load Cells & Pressure Gauges  
Displacement Transducers  
Instrumentation & Accessories  
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FLOW/LEVEL  
Rotameters, Gas Mass Flowmeters & Flow Computers  
Air Velocity Indicators  
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Turbine/Paddlewheel Systems  
Totalizers & Batch Controllers  
pH/CONDUCTIVITY  
pH Electrodes, Testers & Accessories  
Benchtop/Laboratory Meters  
Controllers, Calibrators, Simulators & Pumps  
Industrial pH & Conductivity Equipment  
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DATA ACQUISITION  
Data Acquisition & Engineering Software  
Communications-Based Acquisition Systems  
Plug-in Cards for Apple, IBM & Compatibles  
Datalogging Systems  
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Recorders, Printers & Plotters  
HEATERS  
Heating Cable  
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Cartridge & Strip Heaters  
Immersion & Band Heaters  
Flexible Heaters  
Laboratory Heaters  
ENVIRONMENTAL  
MONITORING AND CONTROL  
Metering & Control Instrumentation  
Refractometers  
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Pumps & Tubing  
Air, Soil & Water Monitors  
Industrial Water & Wastewater Treatment  
pH, Conductivity & Dissolved Oxygen Instruments  
M5280/1112  
11119ML-99J  
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