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CALIBRATION
O
calibration
2
[Zero setting]
Zero setting should be done when CO
(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
3. Press the CAL key once again.
4. The third digit on the CO
5. Press the CAL key once again.
6. The third digit of the O
7. Set 20.0 with the
8. The unit automatically reverts to the display mode.
[Span setting]
Span setting should be done under stable condition of temperature, humidity, CO
1. Press the CAL key for about 5 seconds.
2. The third digit of the temperature indicator flashes, and the other indicators go out.
3. Press the CAL key once again.
4. The third digit of the CO
5. Press the CAL key once again.
6. The third digit of the O
7. Set the present correct O
8. The unit will automatically revert to the display mode.
[Example]
If the O
density is 5.0% and a measured value is 4.8%.
2
1. Set the indication to 4.8 using step 7, then press the ENT key.
2. The unit will automatically revert to the display mode.
Note:
・The calibration is applicable when the set value and present value are less than 15% or more than 25%
O
density.
2
・The separate calibration is needed as the low density (less than 15%) and high density (more than 25%)
has the span calibrating value respectively.
・Always carry out the CO
and O
2
2
density indicator flashes, and the temperature indicator goes out.
2
indicator flashes, and the other indicators go out.
2
key and
key, then press the ENT key.
indicator flashes, and the other indicators go out.
2
indicator flashes, and the other indicators go out.
2
density with the
2
calibration after O
calibrating ( [ZERO],[SPAN] ).
2
2
/N
has not been injected yet and the stable condition
2
density indicator goes out.
2
key and
key, then press the ENT key.
94
and O
density.
2
2
38
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