PrimaX® IR
29
Maintenance
GB
(1)
Remove the environmental or flow cap.
Fig. 19
Remove Environmental Guard
(2)
Place an opaque object (piece of paper, two fingers, etc.) between the light source window and
the mirror to completely obscure the light path for two to three seconds (see Fig. 20).
If the opaque object is left in the light path for longer than 10 seconds, an Obscuration fault
will be set on the mA output (see chapter 4.1).
The device enters the Cleaning Mode for 5 minutes.
Fig. 20
Light path obscuration
WARNING!
The sensor will not respond to the presence of gas in cleaning mode.
Ensure that the environment is free of combustible gases before starting the cleaning procedure.
•
The analog current output will be set to the Cleaning Mode value (see chapter 4) during this time.
•
If monitoring the HART signal, the Cleaning Status bit will be set.
