Nagman METCAL 1200 Manual page 13

3.Input for RTD, TC, mA and Voltage Test
RTD : The RTD Input Connection details are shown below :
2 Wire Use terminals BC for 2 wire with A, B and C, D to be short
3 Wire Use terminals A, B, C for 3 wire with C, D to be short
4 Wire Directly insert to A, B, C, D.
Thermocouple : For all TC, B for Positive (+) and C for
Negative (-)
mA
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NAG/IM/Metcal 1200/01/22