Routine Maintenance
Version 1.1
– Revision Jan 2019 – Part nr.: 02156
22
6.3
Sensor
Warning
The analyzer must be turned off and the air supply must be disconnect-
ed before you start changing the sensor.
If you remove the sensor while there is exhaust gas in the stack, there is
a risk that hot exhaust gas will come out of the sensor house.
The probe and the sensor are hot and can cause severe burning of per-
sonnel if not handled with care.
To change the sensor, please go through the following steps:
Turn off the analyzer and disconnect the air supply.
Unscrew the nuts and remove the blue cover plate of the probe.
To disconnect the sensor electronic control unit (ECU) press the small
button on the plug at the end of the cable to the ECU and pull out the plug.
To dismount the ECU, loosen the two nuts on the back of the mounting
plate.
Use a spanner to loosen the sensor. Then insert a new sensor into the
sensor house.
Mount the ECU back on the mounting plate and reconnect the cable to the
ECU.
Close the blue cover plate of the probe
Figure 6-1: Diffusion probe
Bolts for sensor electronic control unit (ECU)
Sensor electronic
control unit (ECU)