Omega Products TRCIII User Manual

ice point™ Calibration
Reference Chamber

High Precision—Uses Freezing
Water to Maintain 0°C (32°F)

TRCIII

Optional

U A 0°C (32°F)

Thermoelectric
“Refrigerator”

U Eliminates Old

Fashioned
“Ice Bath”

U For Versatile Use

in the Factory,
Laboratory,

Use Up to

6 Probes at

One Time

with TRCIII

Instrument Shop

U Calibration of All

Temperature Instruments
and Sensors

U Rugged Outer Case for

Safe Portability

U Accepts Up to 6 Probes
U Available in 120 or

220 Vac Models

U NIST Traceable

Calibration Available

U Companion Dry Block

Probe Calibrator
Available (Model
CL900/950)

The TRCIII ice pointTM Calibration
Reference Chamber relies on the
equilibrium of ice and distilled,
deionized water at atmospheric
pressure to maintain 6 reference
wells at precisely 0°C (32°F). The
wells extend into a sealed cylindrical
chamber containing the distilled,
deionized water. The outer walls
of the chambers are cooled by
thermo-electric cooling elements.
The increase in volume produced by
the creation of ice crystals within the

TRCIII

cell is sensed by the expansion of a
bellows, which operates a microswitch
and controls the cooling elements.
The alternate freezing and thawing
of the ice accurately maintains a
0°C (32°F) environment around the
reference wells.

The automatic operational features
of this instrument eliminate the need
for frequent attention, required of
common ice baths. On/off cycling
of a pilot light indicates proper
operation of the unit at ice point
temperature.

Any combination of thermocouples
may be used with this instrument by
simply inserting the reference probes
in the reference wells. Calibration of
other types of temperature sensors
at 0°C (32°F) may also be performed.

When accurate temperature
measurements are required, the
TRCIII ice pointTM Chamber delivers
the precision you need. The reference
wells are maintained at 0°C (32°F)
to within ±0.1°C and a stability
of ±0.04°C for constant ambient.
Continuous cycling operation
maintains constant equilibrium
conditions within the cell, eliminating
the slow drift often experienced
in common ice baths as melting

K

TRCIII ice point™ shown with companion
CL950 dry block probe calibrator.
See omega.com for details.

occurs. TRP reference probes, used
with the TRCIII, provide a junction
from thermocouple alloys to copper
wire, at the probe tip. When inserted
into the TRCIII, TRP probes enable
the change from thermocouple alloy
to copper at 0°C (32°F), for accurate
cold junction compensation.

K-12

Thermocouple
TRP Features

U Made with Special

Limits of Error Material

U All Standard

Calibrations Available

U Comes Complete with

Mating Connectors

U Can Be Ordered with

12, 24 or 36" Leads

TRP Applications

Thermocouple leads

Connectors

TRP Applications

Copper leads

Series TRP Reference Probes
up to six can be used at
the same time

Model TRCIII

–

Sturdy handle for easy portability.

Specifications

Reference Wells: 6 wells, 5⁄32" ID, 33⁄4"

deep; wells are thermally and electrically
grounded to each other; accepts
probes

Reference Temperature: 0°C
Accuracy: ±0.1°C or better
Stability: ±0.04°C for constant ambient
Environmental Ambient: 2 to 32°C

(35 to 90°F)
Power Required: 115/220 V, 60 Hz,

100 Watts
Stabilization Time: 2 or 3 hours

depending on ambient temperature
and thermal load

Dimensions:
305 H x 159 W x 322 mm D
(12.0 x 6.25 x 12.7")

Weight: 9.5 kg (21 lb)

Extended Warranty

Program

SM

OMEGACARE

is available for models shown on this page.

Ask your sales representative for full details

when placing an order. OMEGACARE

covers parts, labor and equivalent loaners.

extended warranty program

1

⁄8" OD

SM

SM

Working
Thermocouple
under test in a
known temperature
environment

White-coded
Copper-Copper

Supplied with male
and female
color-coded
thermocouple
connectors

connectors

TRP-T shown with additional wires attached to mating connectors.

Unit must not be allowed to

freeze or damage will result.

Caution:

Thermocouple TRPs

Thermocouple Material Type
Model No. + ­ TRP-K CHROMEGA

®

ALOMEGA

®

TRP-T Copper Constantan
TRP-E CHROMEGA
TRP-J Iron
TRP-S Platinum

®

Constantan
Constantan

Platinum 10% Rh

TRP-R Platinum Platinum 13% Rh
TRP-B Platinum 30% Rh Platinum 6% Rh
TRP-C W 5% Re W 26% Re
TRP-D W 3% Re W 25% Re

For thermocouple Types J, K, T, E, standard length is 12". For 24" or 36" long leads add
suffix “-24” or “-36” to model number, for an additional cost.

For thermocouple Types R, S, B, C, G, D, standard length is 6". Add appropriate suffix for
each additional 6", for an additional cost.

To Order Visit omega.com/trciii for Pricing and Details

Model No. Description
TRCIII ice point™ reference 120 Vac operation

TRCIII-220 ice point™ reference 220 Vac operation
CAL-3 NIST-traceable calibration

Comes complete with operator’s manual, mineral oil and power cord 1.8 m (6').
Ordering Example: TRCIII, ice point™ reference cell, TRP-K, TRP-J, TRP-T, TRP-E,

Type J, K, T and E temperature reference probes.
OCW-3, OMEGACARESM extends standard 1-year warranty to a total of 4 years.

K-13