Sanyo MCO-5M - CO 2 Calibration

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CALIBRATION
CO
2
calibration
Carry out the O
2
calibration first when the calibrations both for CO
2
and O
2
are necessary.
[Zero setting]
Zero setting should be done when CO
2
and O
2
/N
2
has not been injected yet and the stable condition
(about 8 hours) of temperature/humidity inside the unit has been attained.
1. Press the CAL key for 5 seconds.
2. The third digit on the temperature indicator flashes, and the CO
2
density indicator goes out.
3. Press the CAL key once again.
4. The third digit on the CO
2
density indicator flashes, and the temperature indicator goes out.
5. Set 00.0 with the key and key, then press the ENT key.
6. The unit automatically reverts to the display mode.
[Span setting]
Span setting should be done under stable condition of temperature, humidity, and CO
2
density.
1. Press the CAL key for about 5 seconds.
2. The third digit on the temperature indicator flashes, and the CO
2
density indicator goes out.
3. Press the CAL key once again.
4. The third digit on the CO
2
density indicator flashes, and the temperature indicator goes out.
5. Set the present correct CO
2
density with the key and key, then press the ENT key.
6. The unit automatically reverts to the display mode.
Note:
This calibration is available when the present correct CO
2
density is 2% or more.
[Example]
For an internal CO
2
density of 5.0% (setting) and a measured value of 4.5%.
1. Press the CAL key for about 5 seconds.
2. The third digit on the temperature indicator flashes, and the CO
2
density indicator goes out.
3. Press the CAL key once again.
4. The third digit on the CO
2
density indicator flashes, and the temperature indicator goes out.
5. Set the present correct CO
2
density (4.5%) with the key and key, then press the ENT key.
6. The unit automatically reverts to the display mode.