Fluke 754 - RTD Measure, Four-Wire

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Calibration Manual
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Table 14. Temperature Source Verification (Type-K Thermocouple, ITS-90)
UUT
Output
Nominal DC mV
Minimum
1-Year
Maximum
1-Year
Minimum
2-Year
Maximum
2-Year
-180 °C -5.5504 -5.5616 -5.539 -5.5653 -5.5353
0 °C 0.0000 -0.0197 0.0197 -0.0237 0.0237
1300 °C 52.4103 52.3928 52.4277 52.3893 52.4312
RTD Measure, Four-Wire
Note
It is necessary to use a separate verification procedure for the three-wire
RTD measure function because it uses different circuits. The two-wire RTD
measure circuit is tested during the Ohms Measure procedure. If a 5522A is
not available, replace it with a variable resistance source such as a general
resistance RTD-100 RTD simulator and a DMM to measure the variable
resistance source for accuracy. Use the resistance equivalents shown in
Table 15.
To verify the four-wire RTD Measure function:
1. Connect the UUT to the 5522A as shown in Figure 11. Use a four-wire
connection and four-wire compensation.
2. Set the UUT to the RTD measure function, Pt100 (385), ITS-90 scale, and four-
wire termination.
3. Set the 5522A to RTD, Pt100 (385) at -180 °C, ITS-90 scale, and comp four-
wire.
4. Set the 5522A to [Operate].
5. See if the value shown on the UUT is in the range shown in the applicable
column in Table 15.
6. Continue through the test points.
7. When you complete the test, set the 5522A to STANDBY.