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5.3.3 Adjusting moisture interference (Targeted for NO
ers of special specifications)
Since the compact type gas analyzer performs measurements, using specific wave range of infrared ray,
moisture wavelength over the entire wave range interferes with the measurement, thus causing reading
error.
To reduce the effect, corrective operation is required.
The moisture interference adjustment function is added to NO
overlap in large area.
(1) Adjusting moisture interference (Auto adjustment ALL mode)
1) Select <Maintenance Mode> → <6. Interference>, referring to "4.3.6."
To clear moisture correction value already entered,
2) Move the cursor to <RESET> using the
3) Press the
4) Press the
To adjust the new correction value, perform reference zero/span calibration as follows.
5) Directly feed dry N2 or dry Air gas into the sample gas inlet at the rate of 0.5 L/min.
(Adjust the flow rate so that the flow checker ball comes to the center.)
6) Select <Dry N
Caution on operation
• Directly feed dry zero gas and dry span gas to perform reference zero/span calibration.
• Select a gas for zero calibration mode in Dry N
7) Perform zero calibration
8) Perform span calibration of NO
Then, to feed moisture interference gas (H
9) Perform bubbling to humidify N
through the 2°C dehumidifier (electron cooler).
10) Return to <Maintenance Mode> → <6. Interfer-
ence>, and then select <All>.
11) When the interference reading stabilizes in about
3 minutes, press the
12) The reading becomes "0" and "correction value"
is input.
Moisture interference adjustment has now been completed.
key, and the cursor moves to <RESET>.
key again, and the moisture correction value is changed to "0."
> in <Zero Cal.> mode, and then select <ON> for NO
2
and SO
X
gas. Feed the bubbled N
2
key twice.
and SO
X
key.
setting.
2
analyzers.
2
O, saturated at 2°C)
2
gas from the calibration gas inlet
2
- 64 -
and SO
analyz-
X
2
analyzers, whose wave ranges
2
and SO
only.
X
2
Correction
value
INZ-TN2ZSVS-E
Interference
reading
<ON>
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