7102
User’s Guide
30
R0
This probe parameter refers to the resistance of the control probe at 0 °C (32 °F). The value of this
parameter is set at the factory for best instrument accuracy.
ALPHA
This probe parameter refers to the average sensitivity of the probe between 0 °C (32 °F) and 100 °C
(212 °F). The value of this parameter is set at the factory for best instrument accuracy.
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.
C0 and CG
These parameters calibrate the accuracy of the bath set-point. These are programmed at the factory
when the bath is calibrated. Do not alter the value of these parameters. If it is necessary to calibrate the
bath for improved accuracy, then calibrate R0 and ALPHA according to the procedure in Calibration.
rCAL
Do not adjust this parameter. It is for factory use only.
Digital Communication Interface
The calibrator can communicate with and can be controlled by other equipment through the digital
serial interface. This allows the user to set the set-point temperature, monitor the temperature, and
access any of the other controller functions, all with remote communications equipment.
Communications commands are summarized in Figure 7.
Figure 7. Serial Cable Wiring
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