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5. INSPECTION AND MAINTENANCE
5.1 Daily inspection (Be sure to perform daily.)
Name of unit
Flow rate
(1)
Flow checker
check
Needle valve
Reading
(2)
Display unit
check
In addition to daily inspections, perform periodic inspections.
Item of maintenance and inspection
Zero/span calibration
Check of gas aspirator
(2)
(1)
Inspection
Check that the flow rate falls within the specified
range.
If not:
1) Check that the internal capillary is not clogged
with dust, etc.
2) Replace membrane filter. See "5.3.6 Replacing
filter paper of membrane filter."
3) Check air-tightness and repair as required. See
"5.4.1 Airtight test."
4) Replace the diaphragm of the pump by referring
to section 5.3.7 (Replacing the diaphragm).
When reading is lower than normal:
1) Check air-tightness and repair as required.
See "5.4.1 Airtight test."
2) Clean within the sample cell of the analyzer
unit. See "5.3.8 Cleaning measurement cell."
5.2 Periodic inspection
Perform zero/span calibration.
See "3.2 Zero/span calibration."
1) When the flow rate does not increase to the specified value
2) Periodic replacement
Replace the diaphragm.
See "5.3.7 Replacing diaphragm."
Judgment criteria
Maintenance and inspection procedure
- 62 -
Judgment criteria
The ball is kept at the
center of the yellow
zone.
(0.5L/min±0.1L/min)
The reading is normal.
Interval
Once/
5 days
Once/year
INZ-TN2ZSVS-E
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