Hi everyone,
Firstly, I would like to thank all the contributors to this forum for your posts which had been a great source of ideas and solutions to the problems that I encounter at work.
Recently, we had a customer audit and they had pointed a problem with our internal calibration method.
The following had been stated in our calibration master list (please refer attachment):-
Equipment name: Tanita Digital Scale KD200
Range of use: 2g ~ 600g
Process characteristic variation: 5g
Calibration acceptance tolerance: +/-1.67g
The auditor pointed out that for a weighing scale with smallest scale division of 1g, the stated calibration acceptance tolerance was too large and she asked us why did we set such a tolerance.
I was unable to provide an answer to the auditor but I told her that I would review all the tolerance and see if it is suitable for that equipment but I know nothing about calibration.
The guy who was in-charge of the calibration had left my company a few months before and I have no one to turn to for answers.
I would really appreciate if anyone could clarify what the below terms means and how they relate to each other:-
a) range of use
b) process characteristic variation
c) calibration acceptance tolerance
Thank you.
Firstly, I would like to thank all the contributors to this forum for your posts which had been a great source of ideas and solutions to the problems that I encounter at work.
Recently, we had a customer audit and they had pointed a problem with our internal calibration method.
The following had been stated in our calibration master list (please refer attachment):-
Equipment name: Tanita Digital Scale KD200
Range of use: 2g ~ 600g
Process characteristic variation: 5g
Calibration acceptance tolerance: +/-1.67g
The auditor pointed out that for a weighing scale with smallest scale division of 1g, the stated calibration acceptance tolerance was too large and she asked us why did we set such a tolerance.
I was unable to provide an answer to the auditor but I told her that I would review all the tolerance and see if it is suitable for that equipment but I know nothing about calibration.
The guy who was in-charge of the calibration had left my company a few months before and I have no one to turn to for answers.
I would really appreciate if anyone could clarify what the below terms means and how they relate to each other:-
a) range of use
b) process characteristic variation
c) calibration acceptance tolerance
Thank you.