Martel Electronics DMC1400 - Manual (Page 26)

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2. Enter the RTD custom setup main menu, and select [SET
CUSTOM].
3. Using the keypad, enter the values that the calibrator prompts
for: minimum temperature, maximum temperature, R0, and
the values for each of the temperature coefficients.
The custom function uses the Calendar-Van Dusen equation for
outputting and measuring custom RTDs. The coefficient C is only
used for temperatures below 0°C. Only A and B coefficients are
needed for the range above 0°C, so coefficient C should be set
to 0. The R0 is the resistance of the probe at 0°C. The
coefficients for PT385, PT3926, and PT3616 are shown in Table 4
below.
Table 4. RTD Coefficients
RTD Range(°C) R0 Coefficient A Coefficient B Coefficient C
PT385 -260 - 0 100 3.9083x10-3 -5.775x10-7 -4.183x10-12
PT385 0 - 630 100 3.9083x10-3 -5.775x10-7 ---
PT3926 Below 0 100 3.9848x10-3 -5.87x10-7 -4x10-12
PT3926 Above 0 100 3.9848x10-3 -5.87x10-7 ---
PT3916 Below 0 100 3.9692x10-3 -5.8495x10-7 -4.2325x10-12
PT3916 Above 0 100 3.9692x10-3 -5.8495x10-7 ---
5. Using Isolated Measure Modes (Upper
Display)
5.1 Measuring volts and mA
Use the following steps to measure the voltage or current output of a
transmitter.
1. Select the upper display from the Main Menu.
2. Select the desired primary parameter to be measured. Connect
the leads to the isolated inputs of the calibrator, as in Figure 16.
Figure 16. Isolated Input Connection