Sierra Monitor Corporation 5100-06-IT - Manual (Page 30)

Model 5100-XX-IT Toxic Gas Sensor Module
Page: 26
 5100-03-IT Oxygen Deficiency
It is recommended to use fresh Air as the calibration source for the Oxygen detector. If the area is
known to be safe with adequate air flow, you may use the surrounding Air to set the instrument span at
20.9 %. If the condition of the environment is unknown, then the customer may use a cylinder of Zero
Air as the span gas. Please note that the Oxygen concentration contained in Zero Air cylinders may
have anywhere from 20.0 to 21.0 % Oxygen as it is not a precise standard.
To calibrate the Oxygen sensor module, place the module into the calibration mode using the
magnetic wand. Press the Mode key until CALIB is displayed. Press Enter to begin. Select
Calibration value to be 20.9%. Press Enter to confirm. Apply span gas or use the surrounding Air
then press Enter to complete procedure.
 5100-88-IT Carbon Dioxide
The CO
2
transmitter also has a span only calibration adjustment. There is no zero adjustment or
requirement to apply Zero gas. To calibrate the CO
2
detector, place the module into the calibration
mode using the magnetic wand. Press the Mode key until CALIB is displayed. Press Enter to begin.
Select calibration value, typical 2500 ppm, and press Enter to confirm. Apply span gas for at least 3
minutes or until stable. Press Enter to complete procedure.
NOTE
The Analog output values to be transmitted during the calibration procedure are
selected in the maintenance configuration. Normal 20.9% value provides 17.3 mA.