Calibration Interval

by Arun
(India)

I have a pressure gauge initially calibrated on 20.05.2019, next calibration should be 6 months with +/-15 days i.e 20.11.2019 +/-30days.
So I calibrate it on 02.12.2019. What should be next due date? Is it 02.06.2020 or should i consider initial date as 20.05.2020.

Because the auditor pointed that the gauge is calibrated after 20.05.2019 but still within +/-15 days, if often it is calibrated after the date, the calibration will be shifted to next month every time.

Please advise

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Address this Calibration Issue
by: Robert (administrator)

Start with reviewing your over-arching calibration system documentation. Your documentation should address these issues. If it does not, then revise your system so that it does.

Our Calibration Manual can help you with this.

The due date must be the last available date to complete the calibration. The + 15 days tolerance does not work as it provides no notification to the user not to use the tool. You could state a due date with -30 days tolerance for the calibration of the tool.

The next calibration due date can be based on the date you calibrate or on previous the due date. Again, the details of this method needs to be documented in your over-arching calibration manual.

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