The calibration history of the instrument will be displayed on the Calibration screen with both current
and previous correction details shown. Any previous user calibration can be re-applied by touching
‘APPLY’.
Calibration history
17.2 Calibration correction factor
Depending on how many calibration points are used, the
MP-800D
software performs the
following temperature adjustments:
❖
Single point calibration: linear curve forced through zero (
y
= a.
x
).
❖
Double point calibration: linear curve through the two points specified, not forced through
zero (
y
= a.
x
+ b).
❖
Triple point calibration: quadratic regression curve, not forced through zero (
y
= a.
x
2
+ b.
x
+c).
The temperature measured by the temperature sensor will be converted to the displayed temperature
by entering the raw value (
x
) into the function, with
y
being the resulting (calibrated) temperature that
the device eventually displays.
The ‘Correction’ value displayed on the calibration cards is the relative deviation between the
measured temperature and the calibrated temperature at 100°C. For example, when the calibration
curve outputs 99.8°C for a measured 100°C, the displayed correction value will be 0.998.
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