Cleanfit CPA871
Maintenance
Hauser
51
8.2.2
Cleaning the assembly
L
WARNING
Risk of injury if medium escapes
‣
Before each maintenance task, ensure that the process pipe is empty and rinsed.
‣
Move the assembly to service position.
‣
The assembly may contain residual medium; please rinse thoroughly before commencing
work.
L
WARNING
Loss of proper functionality.
‣
Do not open or disassemble the drive.
‣
Only the O-ring on the base of the retraction pipe should be renewed during maintenance.
‣
Clean and lubricate the retraction pipe regularly.
For stable and safe measurements:
1. Clean the assembly and sensor regularly. The frequency and intensity of the cleaning
depend on the medium.
2. Use isopropyl alcohol to clean metal parts, but not the O-rings.
Manually operated assembly
All parts in contact with the medium, such as the sensor and the sensor guide, must be
cleaned regularly.
1. Remove the sensor in the logically reverse sequence to the mounting procedure.
2. Remove light dirt and fouling with suitable cleaning solutions. (→ 49
3. Remove heavy soiling using a soft brush and a suitable cleaning agent.
4. For very persistent dirt, soak the parts in a cleaning solution. Then clean the parts with
a brush.
A typical example of a cleaning interval would be 6 months in the case of drinking water.
Pneumatically controlled assembly
Regular, pneumatically controlled cleaning is recommended using the rinse water connection
and the appropriate equipment.
1. Take apart parts that are in contact with the medium.
2. Clean parts that are in contact with the medium.
3. Clean metal parts with isopropyl alcohol. Do not use isopropyl alcohol to clean the O-
rings.
8.2.3
Cleaning the sensor
→ Documentation of the connected sensor
1. Always clean ORP electrodes mechanically and with water.
