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Thermocouple Reference, Model 842 Ambient TC Referencing System
Isotech, Model 842 Ambient Thermocouple Referencing System
Environmental Referencing Unit
Ideal for Systems with Wide Swings in Ambient Operating Range
The Perfect System for Aircraft Engine Test Stands
  • Waterproof Cased
  • Thermocouple Referencing System
  • Large Capacity: Up to 100 Thermocouples
  • Approved for power station use
  • Rack-mounted ambient temperature referencing system
  • 19" rack mount

Product Code: 842 ISOBOX

   Product Description    Specifications
The function of this thermocouple reference device differs from other cased systems in that the temperature of the metal block in which the thermocouple and copper leads are inserted actually varies with ambient temperature. A separate output signal is produced, which is proportional to the difference between the environmental temperature and the actual reference temperature. The output signal can be fed directly into a computer/data logger to give accurate compensation over a large ambient range. A thermal reservoir, heavily insulated, contains the reference junction probes. The reservoir temperature slowly follows the ambient temperature; an electrical compensation device is thermally integrated with the reservoir and thus senses the reservoir temperature. The thermocouple reference device produces an output proportional to the difference between the reservoir temperature and the reference temperature (usually 0°C).

This is the signal the computer/data logger uses to compensate for the temperature of the reference probes junctions.

The output signal can be in the form of a DC mV output, 4-20 mA, or from a platinum resistance thermometer.
Please discuss with us prior to order.

This thermocouple reference device is housed in robust weatherproof enclosures to IP66, incorporating bottom gland plate. Fixing lugs for wall mounting are provided. Easy access to terminal rails and block assembly is via a lockable, hinged-front door.

Model 842 Isobox Datasheet