2-6 Microphone Calibration CAL200 Manual
If the CAL200 is being used to calibrate several instruments,
then the history of calibration adjustments can usually
pinpoint which instrument is drifting. If all the measurement
instruments are drifting in the same direction by an amount
you consider significant, the CAL200 should be recertified.
If several instruments and several calibrators are in use, then
the history of calibration adjustments would precisely
pinpoint any problem pieces of equipment. Furthermore, it is
probably satisfactory to recalibrate only one of the
calibrators each year.
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