6.15
Calibration Parameters
The user has access to a number of the instrument calibration constants namely
CTO, C0, and CG. These values are set at the factory and must not be altered.
The correct values are important to the accuracy and proper and safe operation
of the calibrator. Access to these parameters is available to the user only so that
in the event that the controller’s memory fails the user may restore these values
to the factory settings. The user should have a list of these constants and their
settings with the manual.
The calibration parameters menu is indicated by,
CAL
Calibration parameters menu
Press “SET” five times to enter the menu.
6.15.1
CTO
Parameter CTO sets the calibration of the over-temperature cut-out. This is not
adjustable by software but is adjusted with an internal potentiometer.
6.15.2
CO and CG
These parameters calibrate the accuracy of the temperature set-point. These are
programmed at the factory when the instrument is calibrated. Do not alter the
value of these parameters. If the user desires to calibrate the instrument for im-
proved accuracy, calibrate R0 and ALPHA according to the procedure given in
Section .
6.15.3
SCO
This parameter is used at the factory for testing purposes and SHOULD NOT
be altered by the user.
9116A Furnace
User’s Guide
38
