887 Frosty One Channel Thermocouple Referencing Unit
- Thermocouple Compensator.
The Frosty Single Channel Thermocouple Referencing Unit is an accurate and low-cost device which
compensates a single thermocouple for the output EMF variations caused by the fluctuations in reference
junction temperature.
Thermocouple tables give the voltage versus temperature variation with the cold junction at 0°C.
This unit senses the temperature difference between ambient and 0°C and generates an electrical voltage
to cancel out the resultant error, thus providing the equivalent of a 0°C reference bath.
Thermocouple Compensator
| Model | Description |
|---|---|
| 887 | Frosty One Channel Thermocouple Referencing Unit |
The unit is powered by a small Alkaline battery. A unique feature is a miniature voltage stabilizer
to eliminate the voltage variations which are one of the most common causes of error in electronic
thermocouple compensators, (the output of a dry cell varies with age, the amount of current which has been
drawn from it and ambient temperature).
This stabilizer, coupled with the thermal integration of the temperature sensitive element, makes the unit
an outstandingly accurate device.
The unit is manufactured to the highest standards and after assembly each unit is calibrated to ensure
conformance with the relevant thermocouple table.
A wide range of thermocouple types are available.
| Model | 887 |
| Referencing Temp | 0°C (others by arrangement) |
| Operating Temp | 0 to 40°C |
| Accuracy | ±0.1°C at 20°C
plus ±0.02°C per degree
above or below 20°C (see graph) |
| Output Impedance | Less than 200 ohms |
| Battery | AAA 1.5V |
| Supply Current | Less than 0.5mA |
| Variations | Periodic checking
of the battery and replacing when its voltage is 1.36 Volts or less, will ensure negligible error |
| Compensation Type | K, T, J, E, U, N |
| Stability | Typically 0.2% p.a. |
| Dimensions | 25mm x 50mm x 100mm (HxWxD) |
| Weight | 0.2 lbs (107g) |