Internal UV Ozone Photometer Page 9-7Following are descriptions of the items that may be found in thePhotometer section of the Ozone Calibration Status screen:Measured Ozone The Measured Ozone presents the averageozone measured by the Photometer.Lamp Temp The Control and Monitor values of thePhotometer lamp temperature is presentedhere.Lamp Current This is a unit-less number, between 0and 5, that is proportional to thecurrent applied to and measured from thePhotometer's UV lamp.Detector Voltage This is the voltage that is presentedto the 2010D's A/D converter aftersignal conditioning the detector'soutput. The voltage displayed hereshould never approach zero or fiveVolts.Detector Count The detector count is the value that isactually used in the Photometer equationon Page 2. It is a unit-less value thatis derived by applying the DetectorOffset and Gain Parameters to theDetector Voltage.Sample Temperature This is the temperature of the samplegas in the measurement tube as measuredby the Photometer's temperature sensor.This is used to compensate the ozonevalue for temperature variations.Sample Pressure This is the pressure in the measurementtube as measured by the Photometer'spressure sensor. This is used tocompensate the ozone value for pressurevariations.
