Is there a rule of thumb to follow when choosing a calibrator?
Is there a rule of thumb to follow when choosing a calibrator?
(OP)
Is there a specific accuracy or other specification one should strive for?
For instance, if calibrating a DMM how much more accurate must the calibration meter be?
Windo
For instance, if calibrating a DMM how much more accurate must the calibration meter be?
Windo





RE: Is there a rule of thumb to follow when choosing a calibrator?
The closer you get to require device accuracies comparable to NIST calibration limits, the lower the TAR that you can achieve.
TTFN
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RE: Is there a rule of thumb to follow when choosing a calibrator?
If you use a TUR of 10:1 you tend to ignore the uncertainty in the calibrator completely. At 4:1 you may then want to consider "guard banding". there are some excellent articles on the web on this subject. Google "TUR" and "guard band".