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Maintenance/inspection item
Contamination of membrane filter
Electronic gas cooler
Temperature controller for NO
2
/NO converter
Procedure
Replace the filter paper if it has blackened (see (3) in 10.5).
If contamination occurs rapidly, then check the pre-stage filters of the
gas extractor ((1) in 10.5), conditioner filter ((2) in 10.5), etc.
Check the fan rotation.
Check that the controlled temperature is approx. 220°C (200°C in case
of NO/CO analyzer).
Note) Bubbling will be eliminated when a pressure control valve is equipped.
Prescribed flow rate value should be checked in the piping system diagram separately presented.
Sample gas
Fastening nut
Conditioner filter
Aspirator
Upper chamber
Water
injection
O-ring (G65)
Wing bolt
Electronic
gas cooler
Bypass
Pressure
control valve
or
Capillary
Lower chamber
Slight bubbling
(Bubbling is eliminated when
the unit is provided with
pressure control valve.)
Drain and exhaust
Exhaust after analysis
To analyzer
Air
aspiration
pipe
H1: Sample negative pressure
H2: Good when longer than 100mm.
Be careful when within 50 to 100mm.
Check extractor filter piping when
shorter than 50mm.
Capillary
H1
H2
Fig. 10-1 Conditioner