TRU Model 937

High capacity thermocouple reference unit

TRU Model 937

High capacity thermocouple reference unit

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The TRU 937 (Temperature Reference Unit) supplies a stable and accurate 0°C or elevated Reference Temperatures between 45°C and 70°C. It is a self-contained all solid state unit using peltier technology which provides maintenance free operation.

The TRU 937 features rapid cool down from high ambient temperatures and is stable within 10 minutes from switch on.

An alarm will be activated should the reference temperatures deviate by more than the user definable span. Thermocouple Reference Junctions are located in a reference block and connected to their marked input and output terminals in an isothermal enclosure. The uniform temperature throughout the enclosure ensures that no thermoelectric EMFs are generated at the terminals.

One advantage of the TRU 937 is that the user need not be concerned with the supply and installation of reference junctions since it is only necessary to connect the thermocouple compensation cables to the input terminals and the measuring instrument to the output terminals of the TRU 937.

There are two models, the TRU 937/50 with up to 50 junctions with a single terminal cover door, and the TRU 397/100 which has doors on the front and rear, as shown in the photograph.

Technical Feature Value
Operating Temperature 0°C (or 45° to 70°C)
Ambient Range 2°C to 65°C
Stability ±0.03°C, errors introduced by thermocouple loading can be removed by adjusting controller offset.
Stabilising Time 10 minutes from 44°C
Capacity Up to 100 Double Junction Channels
Input/Output Connections Klippon Terminals, type 1.5 AKZ
Alarm facilities Non-latching relay rated 5 Amps 240V
Power 100 Watts typical 100-130 or 208-240 VAC 50/60Hz
Dimensions Height 265mm Width 253mm Depth TRU 937/100 - 312mm. Depth TRU 937/50 - 230mm.
Weight TRU 937/100 - 11kg TRU 937/50 - 8kg
Accessories 935-14-55 - Platinum Resistance Thermometer suits Block B2: Includes UKAS calibration at 0.01°C. 935-17-33 - Fan Filter-recommended for high dust environments.
How to order TRU Model 937 - Normally uniquely specified for each order. Please discuss your exact requirements with us before ordering.

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