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CALIBRATION SOLUTIONS
Thermocouple Reference Unit
-20 to 70°C
g
Rack Mounted Ambient Referencing System
g
Large Capacity
g
Approved for Power Station Use
The function of this reference unit differs from other rack
mounted 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.
Isorac Model 844
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). 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 prior to order.
Note:
Rack Mounted Ambient Temperature Referencing System.
19” Rack Mounting.
Large capacity up to 100 Thermocouples.
Approved for Power Station Use.
Model no. 844
Reference Temperature Effectively 0°C
Temperature Gradient ±0.1°C between Junctions
Stability ±0.05°C per 1000 Hours
Ambient Range -20°C to +70°C
Accuracy ±0.1°C per 15°C ambient span
Stabilisation Time 10 mins
Thermocouple Capacity 0 to 100 channels
double junction referencing
Power 10 Watts typical
100-130 or 208-240 VAC 50/60Hz
Low level D.C.
Consumption 6VA typical
Passive Option Available
Dimensions
Up to 50 channels Height 255mm
Width 483mm
Depth 312mm
Weight 17.2kg
50 to 100 channels Height 309mm
Width 483mm
Depth 312mm
Weight 20.4kg
Numerous special versions are available and can be
supplied either in their existing form or modified to customers
requirements.
How to order
Model 844
Isoracs are normally uniquely specified for each order.
Please discuss your exact requirements with us before ordering.
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