Transmille's EA001/EA001A has been designed to minimise typical errors associated with calibration of thermocouple meters that are ignored by other designs.
By making the thermocouple option external, the low voltage output (in the order of 0mV to 100mV, with accuracies in the microvolt level required for accurate simulation) is away from any heat generating components in the calibrator therefore reducing any localised thermal EMF effects.
The inclusion of a Thermocouple plug removes the need to find compensation cables of the correct type, which is a considerable source of error. If the wrong type of compensation cable (for example, when simulating a K type thermocouple, a J type compensating cable) is used there will be a significant error introduced through use of the wrong cable.
Finally, a temperature measurement is conducted at the connection with the UUT, in the thermocouple plug itself. This is measuring the cold junction as close to the internal measurement of the UUT as possible, removing localised differences in temperature.
For further information on the design of our thermocouple option, please view our YouTube video HERE.