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9103
User's Guide
Calibration Parameters
The operator of the Product controller has access to a number of the calibration constants: R0, ALPHA,
DELTA, and BETA. 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 Product. Access to these parameters is
available to the user only so that in the event that the controller memory fails the user can restore these
values to the factory settings. These constants and their settings are included on the calibration
certificate that was included with the instrument.
Do not change the values of the Product calibration constants from the factory set
values. The correct setting of these parameters is important to the safety, proper
operation, and performance of the Product.
The calibration parameters menu is indicated by:
CAL
Push SET five times to enter the menu.
The calibration parameters R0, ALPHA, DELTA, and BETA characterize the resistance-temperature
relationship of the platinum control sensor. These parameters can be adjusted to improve the accuracy
of the Product
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 Product accuracy.
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.
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 Product accuracy.
BETA
This probe parameter characterizes the low temperatures. The value of this parameter is set at the
factory for best instrument accuracy.
Digital Communication Interface
This Product can communicate with and be controlled by other equipment through the digital serial
interface.
With a digital interface, the Product can be connected to a computer or other equipment. This allows
the user to set the set-point temperature, monitor the temperature, and access any of the other
controller functions, all using remote communications equipment. Communications commands are
summarized in Table 2.
Calibration parameters menu
W
Caution
18
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