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Air Heater System
Heater control
Clicking the Heater button at the bottom of the main waveform display in PC-sam opens
the main HEATER window. The window can be used to select which temperature
probe is to be used to control the heater (thermister or fiber optic), to enter the set point
control value (usually around 37 ºC) and to set the maximum heat output (0 – 100%).
Clicking on the Advanced button opens the ADVANCED HEATER window shown
below.
PC-SAM software provides three methods for operating the heater: on/off control, on/off
control with manual control of the duty factor and manual operation with manual control
th
of the duty factor. The 4
option listed PID control is under development.
Selecting on/off control produces continuous light from the" Heater Control" port of
either the ERT Control/Gating or Fiber Optic Temperature Module whenever the
measured temperature is less than the user defined set point. Conversely the light from
the "Heater Control" port is off whenever the measured temperature is greater than the
set point. This method can be useful with external controllers and certain water bath
heating systems. It will not provide control for the SAII Air Heater System.
Revision C, August 2013
6-3
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