Martel Electronics MC1000 - Manual (Page 15)

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I. Measuring Resistance (RTDs)
When measuring resistance (ohms) there are 3
choices when using the MC1000; 2-wire, 3-
wire, and 4-wire. While 4-wire offers the highest
accuracy, most industrial RTDs are a balance 3-
wire. Figure 9. shows how to hook up the
MC1000 for the 3 types of measurements.
1. Choose the desired RTD/ohms range by first
pressing the “TC/RTD” key to get into the
RTD mode. Then use the “Range” key to
select the desired range within the RTD
mode.
H. Measuring Temperature Using a
Thermocouple
Figure 8.
G. Sourcing a Thermocouple Signal
TC wire must be used to achieve an accurate
calibration.
Figure 7.
Note: For best accuracy allow a 10 minute
warm-up period after the MC1000 is turned on.