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8.11.1.2 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.
8.11.1.3 DELTA
This parameter relates to the second order nonlinearity of the sensor. The value
is set at the factory for best instrument accuracy.
8.11.1.4 BETA
This parameter relates to the higher order nonlinearity of the sensor below 0°C.
The value is set at the factory for best instrument accuracy.
8.11.2 Operating Parameters
The operating parameters menu is indicated by,
PAr
Operating parameters menu
Press “UP” to enter the menu. The operating parameters menu contains the
units scale selection set and cut-out reset mode setting.
8.11.2.1 Temperature Scale Units
The temperature scale units of the controller may be set by the user to degrees
Celsius (°C) or Fahrenheit (°F). The units will be used in displaying the well
temperature, set-point, proportional band, and cut-out set-point.
The temperature scale units selection is the first function in the operating pa
-
rameters menu.
Un= C
Scale units currently selected
Press “UP” or “DOWN” to change the units.
Un= F
New units selected
Press “SET” to accept the new selection and resume displaying the well
temperature.
8.11.2.2 Cut-out Reset Mode
The cut-out reset mode determines whether the cut-out resets automatically
when the well temperature drops to a safe value or must be manually reset by
the operator.
38 Hart Scientific
8 Controller Operation