Endress+Hauser CleanFit CPA 451, Operating Instructions Manual

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Maintenance CleanFit CPA 451
16 Hauser
5 Maintenance
#
Warning!
Risk of injury!
Before starting maintenance work on the assembly, make sure that the process line and
the tank are depressurised, empty and rinsed.
Move the assembly to the "Service" position.
5.1 Cleaning of the assembly
To ensure a reliable measurement, the assembly and the sensor must be cleaned at
regular intervals. The frequency and intensity of the cleaning operation depend on the
process medium.
All parts in contact with the medium, e.g. the sensor and the sensor holder, must be
cleaned at regular intervals. Remove the sensor
1
.
•
Remove light dirt using suitable cleaning agents (see chapter "Cleaning agents").
•
Remove severe fouling with a soft brush and a suitable cleaning agent.
•
Remove persistant fouling by soaking in a liquid cleaner and if neccessary by
cleaning with a soft brush.
!
Note!
Grease the outer sleeve to ensure the assembly moves in and out smoothly. Syntheso
Glep 1 (from Klüber) is a suitable grease. Also grease the area between the O-rings with
the aid of the lubricator nipple.
5.2 Cleaning of the sensor
You have to clean the sensor:
•
before every calibration
•
regularly during operation
•
before being returned for repair
You can remove and clean the sensor manually or perform cleaning in automatic
operation
2
via the rinse connection.
!
Note!
•
Do not use any abrasive cleaning agents. This can lead to irreparable damage of the
sensor.
•
After cleaning the sensor, rinse the rinse chamber of the assembly with copious
amounts of water. Otherwise, remaining residues of cleaning agent can corrupt
measurement.
•
If required, re-calibrate after cleaning.
1) in reverse sequence of operations to the installation procedure
2) with the corresponding assembly equipment only