4 Operation
CleanFit P CPA 471
18
Hauser
4.2
Operating the CPA 471 in manual mode
»Measurement« process
•
Release stop bolt lock catch.
•
Introduce electrode and lifting tube completely in process.
•
In this position, arrest electrode holder with stop bolt lock to prevent lifting tube from
retracting unintentionally.
#
Warning!
Risk of injury! If the lifting tube is not arrested in the measurement position, the process
pressure may exit uncontrolled and endanger the operator.
»Maintenance« process
•
Release stop bolt lock catch.
•
Pull lifting tube completely in assembly (»Maintenance« position, see Fig. 3.8)
•
Arrest electrode holder in this position with the stop bolt lock.
•
Carry out maintenance work (see Chapter 5)
4.3
CPA 471 in pneumatic mode
Operating the pneumatic version depends on the control fitted. Refer to the control
operating manual for instructions.
It is not possible to lock pneumatic assembly in »Measurement« position. The
pneumatic system maintains the back-pressure to the process pressure.
"
Caution!
•
During maintenance work (e.g. installing and removing electrode), lock the assembly
in maintenance position using the stop bolt lock.
•
During the automatic rinsing process, do not arrest the lifting tube with the stop bolt
lock, otherwise the assembly can no longer move automatically to the measurement
position.
•
If a maintenance switch is fitted on the measuring transmitter, set it to »Maintenance«
or »Service«.
