Sanyo MCO-19M, Service Manual

Page: 12 / 187

- 9 -
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.
䣖 䣧 䣯 䣲 䢱 䣅 䣑 䢴 䢱 䣑 䢴 䣅 䣣 䣮 䣫 䣤 䣴 䣣 䣶 䣫 䣱 䣰 䢪 䢳 䢱 䢴 䢫
䣒 䣘 䣘 䣱 䣮 䣶
䣖 䣧 䣯 䣲 䣕 䣲 䣣 䣰 䢲 䢰 䢲 䤑䣅 䢵 䢹 䢰 䢲 䤑䣅 䢲 䢰 䢷 䤑䣅
䣅 䣑 䢴 䣜 䣧 䣴 䣱 䢲 䢰 䢲 䢧 䢲 䢰 䢲 䢧 䢶 䢰 䢲 䢲 䣘 䢷 䢲 䢲
䣅 䣑 䢴 䣕 䣲 䣣 䣰 䢶 䢰 䢲 䢲 䣘 䢹 䢲 䢲
䣑 䢴 䣜 䣧 䣴 䣱 䢴 䢲 䢰 䢸 䢧 䢴 䢲 䢰 䢸 䢧 䢷 䢲 䢲
䣑 䢴 䣕 䣲 䣣 䣰 䢴 䢳 䢻 䣯 䣘 䢷 䢲 䢲
䣖 䣧 䣯 䣲 䢱 䣅 䣑 䢴 䢱 䣑 䢴 䣅 䣣 䣮 䣫 䣤 䣴 䣣 䣶 䣫 䣱 䣰 䢪 䢴 䢱 䢴 䢫
䣘 䣱 䣮 䣶
䣅 䣑 䢴 䣔 䣧 䣨 䢶 䢰 䢲 䢲 䣘
䣅 䣑 䢴 䣉 䣣 䣵 䢶 䢰 䢲 䢲 䣘
䣑 䢴 䣉 䣣 䣵 䢴 䢳 䢻 䣯 䣘