Omega Products TX82B User Manual

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APPROVED

⁄8 DIN Economical Two-Wire, Loop-Powered Process Indicator Liquid Crystal Display

TX82B Series

Starts at

160

⻬ FM Intrinsic

Safety Certification

⻬ Powered by 1 to 5 mA,

4 to 20 mA or 10 to 50 mA Signal

⻬ 2.5 Maximum

Voltage Drop

⻬ Display to ±1999, ±19,990

or ±199,900

⻬ 12.7 mm (0.5") LCD ⻬ 100 to 2000 Count

Span Adjust

⻬ 2000-Count Zero

Suppression or Elevation

⻬ Short

⁄8 DIN Case

⻬ Simple 2-Wire Hook-Up ⻬ Safe Plug-in Screw-

Clamp Connector

Options

⻬ -40 to 85°C (-40 to 185°F)

Operating Temperature

⻬ NEMA 4 Splash-Proof

Lens Cover

TX82B is a 1⁄8 DIN-sized 2-wire current-loop indicator that is powered directly by 1 to 5 mA, 4 to 20 mA or 10 to 50 mA process signals, with no need for external power connections. This reduces field wiring costs and provides immunity from most electrical noise encountered in process-control environments. The 2-wire electrical hookup is easy via a plug-in screwclamp connector, which is standard.

Panel Punches

Available, Visit

omega.com/

panelpunches

Readout of Process Variables

The TX82B provides extensive zero and span adjustment capability for direct readout in percent or in engineering units for process variables such as pressure, flow, temperature, or level. A 12.7 mm (0.50") high LCD display provides 31⁄2 active digits for readout to ±1999, 2 jumper-selectable dummy right-hand zeros for display to ±19,990 or ±199,900, and 5 jumper-selectable decimal points. With the dummy zeros, the TX82B can thus be used to display the weight of heavy trucks in pounds or the volume of large tanks in gallons.

Easy to Configure and Calibrate

Both span and zero are finetuned with precision 15-turn potentiometers accessible behind the lens. Coarse zero and span steps as well as the dummy right-hand zero are selected by opening the case and changing push-on jumpers.

Intrinsic Safety Certification

FM intrinsic safety certification is standard. Intrinsic safety certification allows the TX83A to be used in worst-case hazardous environments with no need for an explosion-proof housing, provided

TX82B, $160, shown smaller than actual size.

that an intrinsic safety barrier is used to limit the voltage and current that may be introduced in the hazardous environment.

FM certification (USA) is for class I, II, III, division 1, groups A, B, C, D, E, F, G. The FM certification number is 2Y4A4.AX (3610).

Built for Industrial Environments

The TX82B is housed in a splashresistant case and requires a depth of less than 100 mm (3.9") behind the panel. A splash-proof lens cover which meets NEMA 4 requirements is optional. Electrical connections are via a 3-pole male header connector on the circuit board and a mating plug-in socket connector with screw clamps, which accommodate wire sizes of 0.5 to

2.5 mm (26 to 16 AWG). These supplied connectors provide easy and reliable electrical connections and meet UL and IEC-348 safety requirements.

Specifications

Signal Input Signal: 1 to 5 mA, 4 to 20 mA or

10 to 50 mA (jumper-selectable)

Linear Range: 0.3 to 50 mA Protection: Up to 200 mA forward,

1000 mA reverse current; forward voltage drop, max 2.5V

N-17

Input Resistance: 50 Ω @ 1 to 5 mA,

199900

4 to 20 mA

transmitter

Control room

receiver

4 to 20 mA loop

Extended Warranty

Program

12.5 Ω @ 4 to 20 mA, 5 Ω @ 10 to 50 mA Zero Adjust: -2000 to +2000 counts in

4 jumper- selectable ranges plus fine adjustment 00

Span Adjust: 100 to 2000 counts with fine adjustment

NMR: 46 dB, 50/60 Hz CMR (Meter to Case): 120 dB, DC to 60 Hz CMV (Meter to Case): 300 Vac

Accuracy at 25°C

Maximum Error: ±0.1% of rdg ±1 count Zero Tempco: ±0.1 count/°C typical,

±0.3 count/°C max Span Tempco: ±0.005% of span/°C

typical, ±0.015% of span/°C max

Analog-to-Digital Conversion

Technique: Dual-slope, average-value Polarity: Automatic Integration Period: 100 ms Read Rate: 2.5/s

Mechanical

Case:1⁄8 DIN Panel Cutout: 45 H x 92 mm W

(1.77 x 3.62")

Bezel Dimensions:

(1.89 x 3.79 x 0.31")

Depth Behind Bezel: 100 mm (3.94") Case Material: 94V-0 UL-rated

polycarbonate

Weight: 128 g (4.5 oz) Circuit Board Connector:

Three-pole male header

Cable Connector (Standard):

Mating plug-in socket with screw-clamps for wire sizes

0.5 to 2.5 mm

Connector Safety Ratings:

UL and IEC-348

48 H x 96 W x 8 mm T

(26-16 AWG)

Environmental

Operating Temperature (Standard):

0 to 55°C (32 to 122°F)

Operating Temperature, Optional:

-40 to 85°C (-40 to 185°F) Relative Humidity: 95% at 40°C

(non-condensing)

Display

Type: 7-segment LCD Height: 12.7 mm (0.50") Symbols: -1.8.8.8.0.0 (3

digits plus 2 jumper-selectable dummy right-hand zeros)

Decimal Points: 5 positions, jumper-selectable

Overrange Indication: 3 leastsignificant active digits blank

⁄2 active

A TX82B process-loop indicator may be added to an existing 1 to 5 mA, 4 to 20 mA or 10 to 50 mA installation to provide a local readout scaled in percent or engineering units. No power wiring is required, since the meter is powered directly by the current loop.

AVAILABLE FOR FAST DELIVERY!

To Order (Specify Model Number)

Model No. Price Description TX82B $160 Current loop indicator TX82B-ET 195 Current loop indicator with extended

ambient range of -40 to 85°C (-40 to 185°F)

Ordering Additional Suffix Cost Description

-FS $45 Custom configuration and calibration

Accessories

Model No. Price Description SPC18 $30 NEMA 4 splash proof lens cover SPC4 30 NEMA 4 heavy-duty splash proof lens cover

with screw clamp

Comes complete with operator’s manual.

Ordering Examples: TX82B, current loop indicator, $160. OCW-3, OMEGCARESMextends standard 1-year warranty to a total of 4 years ($37),

$160 + 37 = $197.

program is available for models shown on

OMEGACARE

this page. OMEGACARESMcovers parts,

labor, and equivalent loaners. Ask your

sales representative for full details when

extended warranty

placing an order.

Please see page N-46 for TX1500 Series isolated 2-wire, 4 to 20 mA transmitters.

N-18

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