LF
Flashes
LF
and then displays the setting
LF= On
Current linefeed setting
Adjust the setting using “UP” or “DOWN” and pressing “SET”.
LF=OFF
New linefeed setting
6.13 Calibration Parameters
The operator of the instrument controller has access to a number of the calibration constants
namely R0, ALPHA, and DELTA. 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 instru-
ment. Access to these parameters is available to the user so that in the event that the controller
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 instrument manual.
CAUTION: DO NOT change the values of the instrument calibration constants from the
factory set values. The correct setting of these parameters is important to the safety and
proper operation of the instrument.
The calibration parameters menu is indicated by,
CAL
Calibration parameters menu
Press “SET” five times to enter the menu. The calibration parameters menu contains the param-
eters, R0, ALPHA, and DELTA, which characterize the resistance-temperature relationship of
the platinum control sensor. These parameters may be adjusted to improve the accuracy of the
calibrator.
The name of the parameter flashes on the display and then the value is displayed. The value of
the parameter may be changed using the “UP” and “DOWN” buttons. After the desired value is
reached press “SET” to set the parameter to the new value. Pressing “EXIT” causes the param-
eter to be skipped ignoring any changes that may have been made.
6.13.1 R0
This probe parameter refers to the resistance of the control probe at 0
°
C. The value of this
parameter is set at the factory for best instrument accuracy.
6.13.2 ALPHA
This probe parameter refers to the average sensitivity of the probe between 0 and 100
°
C. The
value of this parameter is set at the factory for best instrument accuracy.
6.13.3 DELTA
This probe parameter characterizes the curvature of the resistance-temperature relationship of
the sensor. The value of this parameter is set at the factory for best instrument accuracy.
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