Amphenol Kaye CTR-40, User Manual, Page: 76 / 84

10 Calibration Procedure
65
If R0 and ALPHA were previously set for 100.000 and 0.0038500 respectively
and the data for t
L
, t
H
, err
L
, and err
H
were as given above then the new values
R0
′
and ALPHA
′
would be computed as 110.116 and 0.0038302 respectively.
Program the new values R0 and ALPHA into the controller. Check the calibra-
tion by setting the temperature to t
L
and t
H
and measuring the errors again. If
desired, the calibration procedure may be repeated again to further improve the
accuracy.
10.4 Calibration Example
The bath is to be used between 25°C 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 R0 and ALPHA are 100.000 and 0.0038500 respectively. The calibra-
tion points are chosen to be 30.00 and 80.00°C. The measured bath
temperatures are 29.843 and 79.914°C respectively. Refer to Figure 8 for ap-
plying equations to the example data and computing the new probe constants.