Co 2 /O 2 Zero Calibration - Sanyo MCO-19M Service Manual

CO /O
2 2
Prior to commence calibration
Make sure chamber temperature should be stabilized, CO
45 ±2 , setting CO
Make sure there should not be left CO
* Note) When you re-commence CO
there should not be left CO
Procedure
1. Call Select Tools (1/2) screen to display Temp/CO2/O2 Calibration.
2. Turn the VR3 around CN15 on the main PCB or measure the voltages both ends of R63 to make
CO sensor reference cell voltage CO2 Zero to 4.00V±0.03V.
2
3. Turn the VR2 around CN3 on the main PCB or measure the voltages both ends of R40 to make
CO sensor gas cell voltage CO2 Span to 4.00V±0.03V.
2
4. Input 0.0% by pressing digit shift key and numerical value shift key and "0.1"% besides right to
the "CO2 Zero" being turned to black. (See the picture below)
5. Press MENU to call MENU display. Select OK and press ENTER key.
zero calibration
density should be 0.0% and setting O
2
in the chamber.
2
calibration, outer door should be opened and make sure
2
in the chamber.
2
sensor BOX temperature should be
2
density should be 20.0%.
2
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