WIKA Pascal 100 - Manual (Page 84)

6 Commissioning, operation
84 WIKA Operating Instruction, Pascal 100 and Pascal 100/IS
GB
6.10.3 Example 3 – Calibration of four wires RTD’s
A 4-wire RTD can be calibrated by using the method of comparison, connecting it to the input (IN
A) as a DUT (Device Under Test) and comparing it with a reference RTD connected to the other
input (IN B) as REF (Reference),
In this way the two measures can be compared, the calculated error is reported on the calibration
report.
The figure below shows the connection of the calibrator
Figure 108 – 4 wires thermoresistance calibration example
Comparison method
Reference RTD DUT RTD
Thermostat (Liquid Bath
– Dry Block)