Download 2000 User Guide - Xitron Technologies

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2000I & 2000M Instrument’s User Guide, Revision B
The 2000M and 2000MN instruments simulate the thermocouple system by computing the hot and reference junction-E.M.F. voltages from the N.I.S.T. tables
with linear interpolation. The output level is set to the difference between these
two levels (VHOT -VREF). Thus single thermocouple (uncompensated) systems can
be simulated by setting the cold junction simulation temperature to 0ºC using the
“Passive CJ” mode.
Select the “Active CJC” mode of operation in the 2000M or 2000MN instrument,
and connect the equipment being calibrated to the rear panel connector using the
correct thermocouple wire (verify polarity). The instrument will automatically
measure and compensate for any ambient temperature at the actual junction between the connecting thermocouple and the CJC #80-BARS.

To set up thermocouple simulation:
1.
2.
3.
Select the thermocouple type: B, E, J, K, N, R, S or T;
Choose active or passive cold junction compensation;
Enter the required hot junction simulation temperature in either ºC or ºF
units.
Note: In cases where an external reference junction exists, and this junction has a
known temperature with an accuracy of better than 0.1ºC, the 2000M or 2000MN
should be operated in the PASSIVE CJC mode.
Measuring Thermocouple Outputs
The 2000M or 2000MN also offers thermocouple measurement capabilities. You
can calibrate both the receiver and the thermocouple itself.

To measure a thermocouple output:
1. Select the desired thermocouple type and cold junction compensation method.
2. Connect the thermocouple to the 2000M or 2000MN instrument.
3. Select the “Standby” state.
4. Select the Measure mode of operation.