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INZ-TN2ZRE-E
7. MAintEnAnCE
7.1 Daily check
(1) Zero calibration and span calibration
(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.
(2) Flow rate check
(1) Sampling gas flow and purge gas flow are as follows:
●
Sampling gas flow :
0.5L/min ± 0.2L/min
●
Purge gas flow
:
About 1L/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
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 filter.
(2) Air is absorbed midway
in the sampling pipe.
(2) Find out cause of leak and
repair.
Sampling gas flow rate
(Purge gas flow is in-
cluded when purging).
Comes off from regu-
lated flowing quantity
(0.3L/min to 0.7L/min).
Adjust by needle valve of flow
rater.
W
eekly check
Zero point of gas
analyzer
It is deflected from zero
point.
Zero adjustment
Span point of gas
analyzer
It is deflected from
standard.
Span adjustment
Yearly check
Gas analyzer
Regardless of any
phenomena
Overhaul
