Measurement uncertainity is not mentioned in the calibration certificate

[arpitha]

Hi,

I am student doing my masters in quality management and i have a subject on calibration.

I would like to understand what should be done if measurement uncertainity is not mentioned in the calibration certificate?

Regards

[Gert Sorensen]

Originally Posted by arpitha

Hi,

I am student doing my masters in quality management and i have a subject on calibration.

I would like to understand what should be done if measurement uncertainity is not mentioned in the calibration certificate?

Regards

Is it instruments that you are calibrating, or instruments that you are having calibrated externally? What kind of instruments are you talking about?

[Hershal]

Arpitha,

First is to determine whether your location (which is not listed) offically recognizes what is known as the 4:1 ratio, and whether you are asking with respect to ISO/IEC 17025. If you are asking with respect to ISO/IEC 17025, then under clause 5.10.4 either uncertainty or an "accepted metrological standard" must be referenced. The 4:1 is an accepted metrological standard.

If 4:1 is referenced you do have the right to ask the calibration provider for proof of the 4:1 for that calibration. They won't like it.

If 4:1 is not officially recognized where you are, then the uncertainty needs to be there, or your calibration is NOT traceable.....the VIM requires an unbroken chain of comparisons to National or international standards, and stated uncertainties at each step, in order to be a traceable calibration.

Hope this helps.

Hershal

[Jim Wynne]

Originally Posted by arpitha

Hi,

I am student doing my masters in quality management and i have a subject on calibration.

I would like to understand what should be done if measurement uncertainity is not mentioned in the calibration certificate?

Regards

You should talk to the calibration service supplier and ask why MU information was not provided.

[cyberjyothi]

actually they are not provided any uncertainty results reg masters they are used and with the regular calibration certificate

If we insist them on to get uncertainty naa they will surely provide