8.11.1.2 ALPHA
This probe parameterrefers to the averagesensitivity of the probe between 0
and 100°C. The valueof 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 factoryf or best instrument accuracy.
8.11.1.4 BETA
This parameter relates to the higher order nonlinearity of the sensor below 0°C.
The valueis set at the factory for best instrument accuracy.
8.11.2 Operating Parameters
The operating parameters menu isindicated by,
PAr Operating parameters menu
Press “UP” to enter the menu. The operating parameters menu contains the
unitsscale selection set and cut-out reset mode setting.
8.11.2.1 TemperatureScale Units
The temperaturescale 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 newselection and resume displaying the well
temperature.
8.11.2.2 Cut-out Reset Mode
The cut-outreset mode determines whether the cut-out resets automatically
when the well temperaturedrops to a safe value or must be manually reset by
the operator.
38 HartScientific
8Controller Operation