Calibration Example - Fluke 7011 User Manual

10 Bath Calibration

Calibration Example

If for example DO and DG were previously set for -25.229 and 186.9740 re-
spectively and the data for t , t , err , and err were as given above then the
L H L H
new values DO' and DG' would be computed as -24.627 and 185.728 respec-
tively. Program the new values DO and DG into the controller. The new con-
stants will be used the next time the bath temperature is set. Check the
calibration by setting the temperature to t and t and measuring the errors
L H
again. If desired the calibration procedure may be repeated again to further im-
prove the accuracy.
10.4 Calibration Example
The bath is to be used between 25 and 75°C and it is desired to calibrate the
bath as accurately as possible for operation within this range. The current val-
ues for DO and DG are -25.229 and 186.974 respectively. The calibration
points are chosen to be 25.00 and 75.00°C. The measured bath temperatures are
24.869 and 74.901°C respectively. Refer to Figure 9 for applying equations to
the example data and computing the new probe constants.
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