On the other hand, dictionaries are pretty generic. All of the definitions may not apply to each application. In metrology, I'm sticking with 3. Falls into determining accuracy and bias.
Who says you can't calibrate a steel rule!
- Thread starter bobdoering
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On the other hand, dictionaries are pretty generic. All of the definitions may not apply to each application. In metrology, I'm sticking with 3. Falls into determining accuracy and bias.
No, the thread is more about "can" than "should". If you are required by contract to calibrate gages that impact the quality of your product, you "can".
True, they can be "adjusted" (smaller). But unless you are using quality level TCE, they will have new values - not adjusted back to their original nominal.You can calibrate gauge blocks. You just have to have the right tools.
Isn't the BIPM the last word in international Metrology?
The vocabulary of metrology they post ( https://www.bipm.org/utils/common/documents/jcgm/JCGM_200_2012.pdf )
Which says:
2.39 (6.11) calibration operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a measurement result from an indication
NOTE 1 A calibration may be expressed by a statement, calibration function, calibration diagram, calibration curve, or calibration table. In some cases, it may consist of an additive or multiplicative correction of the indication with associated measurement uncertainty.
NOTE 2 Calibration should not be confused with adjustment of a measuring system, often mistakenly called “self-calibration”, nor with verification of calibration.
NOTE 3 Often, the first step alone in the above definition is perceived as being calibration.
The vocabulary of metrology they post ( https://www.bipm.org/utils/common/documents/jcgm/JCGM_200_2012.pdf )
Which says:
2.39 (6.11) calibration operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a measurement result from an indication
NOTE 1 A calibration may be expressed by a statement, calibration function, calibration diagram, calibration curve, or calibration table. In some cases, it may consist of an additive or multiplicative correction of the indication with associated measurement uncertainty.
NOTE 2 Calibration should not be confused with adjustment of a measuring system, often mistakenly called “self-calibration”, nor with verification of calibration.
NOTE 3 Often, the first step alone in the above definition is perceived as being calibration.
I've got a gage block stretcher I can sell you.. It does get them a little hot though..True, they can be "adjusted" (smaller). But unless you are using quality level TCE, they will have new values - not adjusted back to their original nominal.
Just a dollop of weld and a regrind. Close enough. (Doesn't work on ceramic blocks!)
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