Sanyo MCO-19M Service Manual page 49

<Setting of CO2 density for standard gas calibration>
Setting of CO2 density for standard gas calibration (optional setting)
Setting range is 0.0%, 4.0~21.0%. (Factory default: 5.0%)
When you set "0.0", CO2 using by standard gas will not be calibrated.
Note) When you input a value lower than "4.0", CO2 density for standard gas calibration is automatically set in 4.0%.
When you input a value higher than "21.0", CO2 density for standard gas calibration is automatically set in 21.0%.
<Setting of O2 density for standard gas calibration>
Setting of O2 density for standard gas calibration (optional setting)
Setting range is 0.5~81.0%. (Factory default: 5.0%)
When you set a value between 18.0~22.0%, O2 using by standard gas will not be calibrated.
Note) When you input a value lower than "0.5", O2 density for standard gas calibration is automatically set in 0.5%.
When you input a value higher than "81.0", O2 density for standard gas calibration is automatically set in 81.0%.
Ex) When both CO2 and O2 are set in 5% in standard gas calibration;
0 In Top Screen, press MENU key and select "Tools".
1 Press ENTER key to display "Select Tools (1/2)".
Press down shift key ( ) to display "Select Tools (2/2)".
2 Select "Standard Gas Setting" in "Select Tools (2/2)" display.
3 Press MENU key and select "OK".
4 Press ENTER key and input "5.0" in the right side of "Std Gas Co2 Density" column in
"Standard Gas Setting" display.
5 Press ENTER key and input "5.0" in the right side of "Std Gas O2 Density" column in
"Standard Gas Setting" display.
6 Press MENU key and select "OK".
7 Press ENTER key to return to "Select Tools (1/2)" display.
Procedures
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MENU key
Tools
OK
OK