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6.10
Controller Configuration
The controller has a number of configuration and operating options and calibra-
tion parameters that are programmable via the front panel. These are accessed
from the secondary menu after the cut-out set-point function by pressing
"SET". There are 5 sets of configuration parameters — probe parameters, oper-
ating parameters, serial interface parameters, IEEE-488 interface parameters,
and controller calibration parameters. The menus are selected using the "UP"
and "DOWN" keys and then pressing "SET".
6.11
Probe Parameters
The probe parameter menu is indicated by,
PrObE
Press "SET" to enter the menu. The probe parameters menu contains the pa-
rameters, R0, ALPHA, and DELTA, which characterize the resis-
tance-temperature relationship of the platinum control sensor. These parameters
may be adjusted to improve the accuracy of the calibrator. This procedure is ex-
plained in detail in Section .
The probe parameters are accessed by pressing "SET" after the name of
the parameter 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 parameter to
be skipped ignoring any changes that may have been made.
6.11.1
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.
6.11.2
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.
6.11.3
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.
6.12
Operating Parameters
The operating parameters menu is indicated by,
Probe parameters menu
6 Controller Operation
Controller Configuration
33
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