Single Gas Analyzer (SGA)
Operations Manual
Super Systems Inc.
Page 24 of 44
Page 24 of 51
Sensor Information
The Sensor Information page displays information on the following:
AVdd: This value is the supply voltage for the analog to digital converter that measures
the pellistor voltage. This value is typically about 5V.
Excitation Vdd: This value is the voltage seen across the pellistor bridge. This value
should be approximately 0.9V.
Pellistor Vdd: This value is the voltage present across the sensing pellistor. This voltage,
in air, should be approximately half the excitation voltage.
Gas Temperature: The temperature of the measured gas
Ambient Temperature: The ambient temperature where the sensor is located.
NOTE: The following options are intended primarily for SSi personnel to assist with
troubleshooting procedures.
Zero Vdc: (voltage direct current) A record of the zero vdc reading from the most recent
calibration.
Zero Gas Temperature: A record of the zero gas temperature reading from the most
recent calibration.
Span Vdc: (voltage direct current) A record of the span vdc reading from the most recent
calibration.
Span Gas Temperature: A record of the span gas temperature reading from the most
recent calibration.
Span Target %: A record of the span target % from the most recent calibration.
Note that each of these values is for diagnostic use only. Call SSi at (513) 772-0060 with
questions.
