Omega TX82B User Manual

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OMEGA

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User’s Guide

TX82B

Panel Mounted

Current Loop Indicator

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OMEGAnet® On-Line Service

www.omega.com

Internet e-mail

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Servicing North America:

USA: One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford CT 06907-0047

TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar
Laval (Quebec) H7L 5A1
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA
Customer Service: 1-800-622-2378 / 1-800-622-BEST
Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

Mexico and TEL: (001)800-TC-OMEGA® FAX: [phone]
Latin America: En Español: [phone]-7803

e-mail: [e-mail]

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Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands
TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Frystatska 184, 733 01 Karviná
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

France: 11, rue Jacques Cartier, 78280 Guyancourt
TEL: [phone] FAX: [phone]
Toll Free in France: 0800 466 342

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany
TEL: [phone] FAX: [phone]
Toll Free in Germany: 0800 639 7678
e-mail: [e-mail]

United Kingdom: One Omega Drive

ISO 9002 Certified River Bend Technology Centre

Northbank, Irlam Manchester M44 5BD United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in England: 0800 488 488
e-mail: [e-mail]

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TABLE OF CONTENTS

1.0 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.1 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2.2 Accuracy at 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.3 Analog-To-Digital Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.4 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.5 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.6 Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.0 MECHANICAL ASSEMBLY AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.1 Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.2 Intrinsic Safety Parameters for FM (Factory Mutual) . . . . . . . . . . . . . . . . . . . . . 4

3.3 Installation/Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4.0 SIGNAL INPUT CONNECTIONS (P3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5.0 CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

5.1 Standard Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

5.2 Field Configuration Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6.0 CUSTOMER CONFIGURATION AND CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . .9

6.1 Formula . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6.2 Configuration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6.3 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6.4 Factory-Setup Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7.0 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

ILLUSTRATIONS

Figure 3-1 Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 3-2 DIN Case Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 5-1 Main Board Jumper Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 7-1 Wiring Diagram for TX82B Usage for FM (Factory Mutual) . . . . . . . . . . . 11

i

UNPACKING INSTRUCTIONS

Remove the Packing List and verify that you have received all equipment,
including the following:

QTY DESCRIPTION

1 Current Loop Meter Indicator with all applicable connnectors attached.

1 Owner's Manual

1 Factory Setup Label

If you have any questions about the shipment, use the phone number for the
Customer Service Department nearest you.

When you receive the shipment, inspect the container and equipment for signs of
damage. Note any evidence of rough handling in transit. Immediately report any
damage to the shipping agent.

The carrier will not honor damage claims unless all
shipping material is saved for inspection. After
examining and removing contents, save packing
material and carton in the event reshipment is
necessary.

ii

1

1.0 GENERAL INFORMATION

Model TX82B two-wire current-loop indicator accepts 1-5 mA, 4-20 mA, or 10-50
mA process signals and digitally displays the process variable in percentage or
engineering units of such measurements as pressure, flow, temperature and level.
No separate power supply or power connections are required, since the TX82B
obtains operating power directly from the current loop with a voltage drop of less
than 2.5 V. It can tolerate current overdrives up to 200 mA forward and 1000 mA
reverse.

The compact TX82B circuit is mounted in a black polycarbonate case with the
standard 1/8 DIN panel-mount bezel and a depth of less than 110 mm (4.33 in).
Five 12.7 mm (0.5 in) high liquid crystal 7-segment digits are used to display
±1999 active counts plus one or two dummy right-hand zeros.

The TX82B displays from -1999 to 1999 counts with the option of one or two
dummy right-hand “0” digits. Zero suppression or elevation capability exceeds
full scale. Program jumpers are used to scale the readout for percentage or
engineering-unit display. Both zero and span are fine-tuned with multiturn
potentiometers accessible through the display board, requiring lens removal for
readjustment.

When removed from its case, the TX82B can be programmed with gas-tight
jumpers for three input ranges (1-5, 4-20 or 10-50 mA), four coarse zero ranges,
four decimal-point locations and the dummy right-hand zeros. Two additional
jumpers are provided to reverse the span slope so that increasing the input can
cause a reading decrease; thus a 4-20 mA input can be programmed to produce
a 2000 to -18000 reading when one dummy right-hand zero is also used.

2

2.0 SPECIFICATIONS

2.1 INPUT

Current 1-5 mA, 4-20 mA or 10-50 mA

Protection 200 mA max forward and 1000 mA max

reverse

Voltage Drop 2.5 V max forward and 1.2 V max reverse

Span Range 100 to 2000 counts continuous adjustment

with a multiturn potentiometer

Zero Range The multiturn zero potentiometer can displace

the displayed reading by ±500 counts from the
center of each of the four overlapping zero
ranges, provided that the resultant is within the
±1999 count display capability.

Span Slope Positive or Negative

Normal Mode Rejection

at 50/60 Hz 46 dB minimum

2.2 ACCURACY AT 25°C

Maximum error ±0.1% R ±1 count

Zero tempco ±0.1 ct/K typ, ±0.3 ct/K max

Span tempco ±0.005%S/K typ, ±0.015%S/K max

2.3 CONVERSION

Technique Dual-slope, average value with autozero

correction

Polarity Determined automatically at the end of input

integration period

Input integration period 100 milliseconds (nominal value)

Reading rate 2.5/second