VERDER CARBOLITE GERO HZS 12/900 Installation, Operation And Maintenance Instructions page 50

5.0 2132 Controller
The controller is calibrated for life at manufacture against known reference sources, but
there may be sensor errors or other system errors. User calibration allows
compensation for such errors and this controller allows for a user 2-point calibration.
This setting is password protected to avoid accidental alteration.
Page to iP, scroll to CAL.P and use up
correct password is entered, the display shows PASS. Scroll to CAL and use up
down to observe the setting FACt (factory values, as manufactured) or USEr (user
values). Change to USEr.
NOTE: before checking the calibration of the controller, or of the complete system,
remember to reset the controller to factory calibration values by setting the CAL.P
parameter to FACt.
To enter a user calibration, scroll to each of the following parameters in turn and set the
desired values.
Pnt.L low temperature for which an offset is to be entered
OFS.L offset value for the low temperature
Pnt.H high temperature for which an offset is to be entered
OFS.H offset value for the high temperature
Example: the controller reads 3 °C low at 400 °C and 5 °C low at 1000 °C. The
parameter values should be Pnt.L=400, OFS.L=3, Pnt.H=1000, OFS.H=5.
Negative or positive values can be entered: if the controller is reading high, negative
offsets would be appropriate.
Fig 4 gives a graphical representation of the 2-point calibration.
50
to alter the password. The password is 3. If the
Fig 4 - 2-Point Calibration
or