Proof Testing · Functional Safety Play Book

Proof Testing

Hi All,

I am currently writing a proof test procedure for a High-High Temperature SIF. The sensor is 3-wire RTD.

After carrying out all the proof testing checks, I have included for an RTD Calibration check to be carried out at the end, using a decade box or loop calibration device e.g. Fluke 754). Reason being, I wanted to ensure the loop was functioning correctly still after disconnecting sensor wires etc, during the proof test.

However, my Client has requested this to be removed from the Proof Test as this is done as part of other existing maintenance routines.

Just want to get anyone's thoughts on this, as to whether it is overkill to include an RTD check, and I should simply just ask the user to check the RTD is within it's prescribed calibration date?

Any opinions on this would be appreciated!

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