EA001A Thermocouple Source / Measurement Adapter


Introduction

Temperature gradients and Thermal EMF's, which can be introduced by internally fitted thermocouple simulation methods, are one of the greatest sources of error when calibrating thermocouple meters.

For the ultimate in accuracy, Transmille has designed a dedicated source/measure external adapter. This keeps the electronics required to generate the low-level signals used for thermocouple simulation as close as possible to the measuring input of the thermometer, which also allows the signal to be as free from electrical noise as possible, while eliminating errors caused by heat generated by surrounding electronics.

Special care has been taken over the cold junction compensation measurement functionality, which is a common source of errors in thermocouple calibration. The cold junction compensation (CJC) sensor is mounted in the thermocouple plug itself. By measuring the cold junction at the instrument’s input, any type of thermocouple can be simulated without requiring the use of thermocouple compensation cables.

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