Wika Pascal 100 Manuale Utente Scaricare il pdf (Pagina 84)

6 Commissioning, operation

84 WIKA Operating Instruction, Pascal 100 and Pascal 100/IS

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)

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Wika Pascal 100 Manuale Utente Pagina 84