Omega Products TX83A User Manual

Two-Wire, Process-Loop Indicator

Extended Warranty

Program

SM



F M

APPROVED

Optional NEMA 4X/7 Housing

⻬ FM Intrinsic

⻬ Powered by 1 to 5,

⻬ 2.5V Max Voltage Drop
⻬ 8.9 mm (0.35") LCD
⻬ 2000-Count Zero

⻬ 100 to 2000 Count

⻬ Selectable Dummy

⻬ -40 to 85°C Operation
⻬ Compact, 74 mm (2.9")

⻬
⻬ Shock Resistant to 55 g

The TX83A is a 2-wire current-loop
indicator that is powered directly by
a 1 to 5 mA, 4 to 20 mA or 10 to
50 mA process loop signal. No
separate power supply connections
are required. This reduces overall
hardware and field wiring costs and
provides immunity from most
electrical noise encountered in
process control environments. The
electronics are isolated from the case.

Readout of Process Variables

The TX83A provides extensive zero
and span adjustment capability, so
that it can read out directly in
percent or in engineering units for
process variables such as pressure,

TX83A Series

Starts at

$

335

Safety Certification

4 to 20 or 10 to
50 mA Signal

Suppression or Elevation

Span Adjust

Right-Hand Zero

Dia Diecast Housing
Waterproof to 35 kPa (5 psi)

Options

⻬1⁄2 EMT Conduit Fitting

1

⻬

⁄2 NPT Pipe Fitting

⻬ Relay-Track Mounting

Adaptors

⻬ External Explosion-

Proof Housing

⻬ Relay-Track Mounting

TX83A, $335, with EPW3-ATEX
NEMA 4X/7 enclosure, $162.

TX83A, $335.

EPW3-ATEX
housing, $162.

flow, temperature, or level. Its liquid
crystal display provides 31⁄2 active
digits, a selectable dummy right-hand
zero, and 4 programmable decimal
points.

Easy to Configure and Calibrate

Both span and zero are fine-tuned
with precision multi-turn potentiometers.
These are accessible through holes
in the diecast cover, which are
normally sealed with fluorosilicone
plugs.

Designed for Harsh Environments

All versions of the TX83A are rated
for operation from -40 to 85°C
(-40 to 185°F) with specified
accuracy. The case is made of
diecast metal and is waterproof to
35 kPa (5 psi). The electronics are
firmly connected to the case top, so
that the meter can withstand high
vibration and shock.

Intrinsic Safety Certification

Intrinsic safety certification allows the
TX83A to be used in worst-case
hazardous environments with no

M-113

TX83A, $335.

TX84, $355.

All shown smaller

than actual size.

need for an explosion-proof
housing, provided 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 5X2AO.AX (3610).

Explosion-Proof Housing Options

Two external NEMA 7
proof and NEMA 4X
sand-cast, copper-free aluminum
enclosures with corrosion resistance
“safety-blue” polyester powder­coating for use in hazardous
locations. FM, UL, cUL certification:
class I, groups B, C, D; class II,
groups E, F, G; and class III, Type 4X.

Option EPW3 is a single-height
enclosure for one TX83A loop­powered indicator. Option EPW2 is
a double-height enclosure for a
TX83A loop-powered indicator on
top and a TX1500 series isolated
2-wire 4 to 20 mA transmitter on the
bottom for indicating transmitter
applications. Available with 2 female

1

⁄2 NPT pipe fittings, all required
internal mounting hardware, and
mounting flanges for a wall or bulkhead.

OMEGACARESMextended
warranty program is available
for models shown on this
page. Ask your sales
representative for full details
when placing an order.
OMEGACARE
labor and equivalent loaners.

explosion-

waterproof,

SM

covers parts,

Z

S

4-20mA

transmitter

Control room

receiver

4-20mA loop

Specifications

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: 200 mA forward,

1000 mA reverse

Forward Voltage Drop, Max:

2.5 V up to 50 mA
Input Resistance: 50 Ω at 1 to 5 mA,

12.5 Ω at 4 to 20 mA, 5 Ω at 10 to 50 mA
Zero Adjust: –2000 to 2000 counts

(4 jumper- selectable ranges
plus fine adjustment)

Span Adjust: 0 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): 700 Vp
RFI Susceptibility: Less than ±0.5%

of span with conduit fitting or external
explosion-proof housing in 10V/m field
strength at 27 or 440 MHz

Accuracy at 25°C

Maximum Error:

±0.1% of span ±1 count 00 zero tempco
±0.1 count/°C typical,
±0.2 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

Display

Type: 7-segment LCD
Height: 8.9 mm (0.35")
Symbols: -1.8.8.8.0 (3

plus jumper-selectable dummy right­hand zero)

Decimal Points: 4 positions,
jumper-selectable

Overrange: 3 least-significant active
digits blank

Environmental

Operating Temperature:

-40 to 85°C (-40 to 185°F)
Vibration: 1.52 mm (0.06") double-

amplitude cycled at 10 to 80 Hz

Shock: 55 g half-sine, 9 to 13 ms duration
Waterproof Pressure: 35 kPa max (5 psi)

Mechanical

Weight: 14 oz (400 g)
Diameter: 74 mm (2.9")
Height, Including Barrier:

48 mm (1.9")

Electrical Connections:

TX83A: 3-terminal barrier strip with

#6 screws

1

TX84:

⁄2 NPT male pipe fitting
with two 0.3 meter #18 stranded
wires

TX84-2:

1

⁄2" EMT male conduit fitting
with two 0.3 meter #18 stranded
wires

Mounting Methods

TX83A:

• Surface mount with 4 #6 rear-entry
screws from backside of bulkhead

• Snap mount into 63.5 mm
(2.50") relay track

• Surface mount with two #8
front-entry screws
Requires MAT1 adaptor plate

1

⁄2 active digits

• Snap mount into 69.9 mm (2.75")
or 76.2 mm (3.00") relay track
Requires MAT1 adaptor plate.

• Snap mount into DIN relay track
Requires MDT1 rail clamp

• Push mount into explosion proof

The TX83A process-loop indicator may be
added to an existing 4 to 20 mA or
10 to 50 mA installation. No additional
wiring is required, since the meter is
powered directly by the current loop.

housing EPW3-ATEX

AVAILABLE FOR FAST DELIVERY!

To Order (Specify Model Number)

Model No. Price Configuration
TX83A $335 Flat surface or relay track mounting
TX84 355 NPT pipe mounting
TX84-2 355 EMT conduit mounting

Mounting Options (TX83A Only)

Order Add’l.
Suffix Price Description

-MAT1 $10 Adaptor plate for

surface mount or

69.9 mm relay track

-MDT1 15 Rail clamp for

DIN relay track

Accessories

Model No. Price Description
MXS1 $12 Spring retainers for TX83A in explosion

proof housing EPW3

MXS2 12 Spring retainers for TX83A in explosion

proof housing EPW2

EPW3-ATEX 162 NEMA 4 and NEMA 7 rated environmental enclosure

with window, single height; includes MXS1 hardware
(supplied with Demko/ATEX certificate)

EPW2-ATEX 179 NEMA 4 and NEMA 7 rated environmental enclosure

with window, double height for TX83A and TX1500
series transmitter; includes MXS1 and MXS2 hardware
(supplied with Demko/ATEX certificate)

Comes complete with operator’s manual.

Ordering Examples: TX84 current loop-indicator with NPT pipe mounting, $355.
OCW-3 OMEGACARESMextends standard 1-year warranty to a total of 4 years ($86),

$355 + 86 = $441.

M-114

Options

Order Add’l.
Suffix Price Description

-FS $45 Custom

configuration and
calibration

M