59
INZ-TN2ZRE-E
(1) Perform zero calibration. For the calibration procedures, refer to “Item 6.8.1 Zero calibra-
tion.”
(2) Then, perform span calibration. For the calibration procedures, refer to “Item 6.8.2 Span cali-
bration.”
(3) Zero/span calibration should be carried out once a week, as required.
(1) Sampling gas ow and purge gas ow are as follows:
●
Sampling gas ow : 0.5L/min ± 0.2L/min
●
Purge gas ow : About 1L/min
(2) Check and maintenance should be carried out every day, as required.
Table 7.1 Maintenance and check table
Parts to be checked Phenomena Remedy
Daily check
Indication value Indication values are
lowered.
Indication values are
higherd.
(1) Dust is mixed in
sampling cell.
(1) Clean the sampling cell.
In addition, check sampling
devices, especially gas lter.
(2) Air is absorbed midway
in the sampling pipe.
(2) Find out cause of leak and
repair.
Sampling gas ow rate
(Purge gas ow is in-
cluded when purging).
Comes off from regu-
lated owing quantity
(0.3L/min to 0.7L/min).
Adjust by needle valve of ow
rater.
Weekly check
Zero point of gas
analyzer
It is deected from zero
point.
Zero adjustment
Span point of gas
analyzer
It is deected from
standard.
Span adjustment
Yearly check
Gas analyzer Regardless of any
phenomena
Overhaul
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