YOKOGAWA IR400 series, User Manual

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<7.MAINTENANCE>
7-1
IM 11G02N01-01E
7. MAINTENANCE
7.1 Daily check
(1) Zero calibration and span calibration
1. Perform zero calibration. For the calibration procedures, refer to “Item 6.9.1 Zero calibration”.
2. Then, perform span calibration. For the calibration procedures, refer to “Item 6.9.2 Span
calibration”.
3. Zero calibration and span calibration should be carried out once a week, as required.
(2) Flow rate check
1. Sampling gas flow and purge gas flow are as follows:
• Sampling gas flow: 0.5 ± 0.2 L/min
• Purge gas flow: About 1 L/min
2. Check and maintenance should be carried out every day, as required.
7.2 Daily check and maintenance procedures
Table 7.1 Maintenance and check table
Parts to be checked Phenomena Causes Remedy
Daily
check
Indication value Indication values are
lower.
Indication values are
higher.
(1) Dust is mixed in
sampling cell
(1) Clean the sampling cell.
In addition, check sampling
devices, especially gas filter.
(2) Air is absorbed midway
in the sampling pipe.
(2) Find out cause of leak and
repair.
Purge gas flow is
included when purging
gas in sample gas flow
rate.
Standard flow is beyond
the specified flow rate of
0.5 L/min, 0.3 to 0.7 L/
min.
Adjust be needle valve of flow
rater.
W
eekly check
Zero point of gas
analyzer
It is deflected. Adjust.
Span point of gas
analyzer
It is deflected. Adjust.
Yearly check
Gas analyzer Regardless of any
phenomena
Overhaul.