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FERITSCOPE® DMP30
Calibration
6. Did you deactivate the lock function in step 2.?
- Yes: Reactivate the lock function: 69.
Function is activated:
- No: Continue with step 7.
7. Exit the calibration menu: , the name has now been changed.
9.10 Checking the precision of a calibration
The Check Calibration function checks during a control measurement whether the
mean value of the control measurement matches the nominal value of the used cal-
ibration standard within the measurement uncertainty (in accordance with ISO/IEC
Guide 98-3).
Important to know
The Check Calibration function allows you to check the calibration state of the
selected calibration and the measurement accuracy of the measurement sys-
tem. The result of the check applies only to the calibration selected.
The check must be performed under the same conditions applied for the cali-
bration procedure, at the same temperature, using the same calibration set for
example.
The precision of the calibration is limited by the measurement uncertainty of
the calibration standard. The measurement uncertainty of the calibration must
not be smaller than the measurement uncertainty of the calibration standard
used. To improve the calibration precision, you must use calibration standards
with smaller measurement uncertainties for the calibration procedure.
The determined measurement uncertainty applies only to a small range around
the nominal value of the calibration standard for which the control measure-
ment was performed.
If you wish to determine the measurement uncertainty for a measurement
range, perform control measurements on two calibration standards that limit
the measurement range. You can determine the measurement uncertainty for
this measurement range through a linear interpolation of the two measure-
ment uncertainties of the control measurements on the two calibration stan-
dards.
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