Maintenance/inspection item | Procedure |
|
|
Contamination of membrane filter | Replace the filter paper if it has blackened (see (3) in 10.5). |
| If contamination occurs rapidly, then check the |
| gas extractor ((1) in 10.5), conditioner filter ((2) in 10.5), etc. |
|
|
Electronic gas cooler | Check the fan rotation. |
|
|
Temperature controller for NO2/NO converter | 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.
Conditioner filter |
|
| |
Fastening nut | Wing bolt |
| |
Sample gas |
|
To analyzer
Water injection
Air aspiration pipe
H1
Aspirator
Upper chamber
Electronic gas cooler
H2
Capillary
or
Pressure
control valve
Bypass
Capillary
Lower chamber
Exhaust after analysis
Drain and exhaust
Slight bubbling
(Bubbling is eliminated when the unit is provided with pressure control valve.)
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.
Fig. 10-1 Conditioner
– 27 –
