GREEN INSTRUMENTS G4130 NOX/O2, Руководство пользователя, Страница: 24 / 32

G4130 NO
x
/O
2
Analyzing System
23
6.4 Diffusion Probe
The probe filter element is normally cleaned by back-flushing. The period be-
tween back-flushings depends on the actual flue gas condition and how dirty the
filter gets.
Regular back-flushing will normally keep the filter clean. However, a slow re-
sponse to NO
X
/O
2
changes in the flue gases indicates that the probe filter may be
contaminated. In that case, manual cleaning of the probe is required.
Warning
The analyzer must be turned off and the air supply must be disconnect-
ed before you start working with the probe.
If you remove the probe while there is exhaust gas in the stack, there is
a risk that hot exhaust gas will come out of probe hole.
The probe and the sensor are hot and can cause severe burning of per-
sonnel if not handled with care.
Figure 6-2: Maintenance of the diffusion probe
– changing the filter
Sensor & filter flange
Filter
Probe flange
Sensor ECU