Sanyo MCO-19M - Control Panel and Keypad Operations; Understanding the Control Panel Interface

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㻌 CO
2
/O
2
zero calibration 㻌
㻌
Prior to commence calibration
zMake sure chamber temperature should be stabilized, CO
2
sensor BOX temperature should be
45䉝±2䉝, setting CO
2
density should be 0.0% and setting O
2
density should be 20.0%.
zMake sure there should not be left CO
2
in the chamber.
* Note) When you re-commence CO
2
calibration, outer door should be opened and make sure
there should not be left CO
2
in the chamber.
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
2
sensor reference cell voltage
䠄
CO2 Zero
䠅
to 4.00V±0.03V.
3. Turn the VR2 around CN3 on the main PCB or measure the voltages both ends of R40 to make
CO
2
sensor gas cell voltage
䠄
CO2 Span
䠅
to 4.00V±0.03V.
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.
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