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Environmental Referencing Unit
Ideal for Systems with wide Swings in Ambient Operating Range
The Perfect System for Aircraft Engine Test Stands

• Waterproof Cased Ambient Temperature
• Thermocouple Referencing System
• Large Capacity up to 100 Thermocouples
• Wide Ambient Range
• Approved for Power Station Use
• Rack Mounted Ambient Temperature Referencing System
• 19" Rack Mounting

The function of this reference unit 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 or 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 device produces an output proportional to the difference between the reservoir temperature and the reference temperature (usually 0°C).

Units are housed in robust weatherproof enclosure. Easy access to terminal rails and block assembly is via a lockable front door.