CE 4
Maintenance and cleaning
Hauser
17
7
Maintenance and cleaning
The intervals when the sensors need to be monitored and cleaned are mainly
dependent on the features of the medium that is to be measured. It is therefore
recommended that during the initial time after commissioning that the sensors are
regularly monitored for soiling. This will then make it easier to set sensible maintenance
intervals.
!
Note!
Please take note of chapter 7 "Maintenance" in the ASP-Station 2000 operating manual.
7.1
Manual cleaning of the measurement system
When the measurement station has been operational for longer time periods it is
possible that the internal pipework system becomesdirty. This cannot be removed by
the self cleaning function of the unit. Therefore, depending on the application it may be
necessary to run a complete pipework cleaning sequence at least every 3 to 6 months.
1.
Switch the pump off (motor starter in the swing frame).
2.
Open the outflow valve.
3.
Open the overthrow nuts on the sensors.
4.
Carefully remove the sensors - avoid contact with them!
5.
Open the inflow and outflow connection to the pipework system. Check the
condition of the jubilee clips and hoses for reuse.
6.
Loosen the fixing clamps and remove the pipework system.
7.
Loosen the screwed fitting on the pipework. These can be very tight so use a pipe
clamp (oil filter spanner) to loosen them.
8.
Clean all pipe elements using bottle brush and water jet.
9.
Rebuild all elements, hand tighten all overthrow nuts. Make sure that everything fits
perfectly if necessary use grease suitable for PVC!
10. Switch the pump on (motor starter in the swing frame).
7.2
Sensor control and cleaning
1.
Switch the pump off (motor starter in the swing frame).
2.
Open the outflow valve (PVC).
3.
Open the overthrow nuts on the sensors.
4.
Carefully remove the sensor holders, avoid contact with them!
5.
Clean the sensors carefully using sponge and potable water.
6.
Clean the holders and overthrow nut threads.
7.
Replace sensor holder. Take note of the position of the turbidity sensor! (key pin).
8.
Hand tighten all overthrow nuts. Make sure that everything fits perfectly. If
necessary use grease suitable for PVC!
9.
Close the outflow valve (PVC).
10. Switch the pump on (motor starter in the swing frame).
11. Observe the measured values. Are all measurements indicating plausible values?
If not the sensors should be recalibrated. The calibration procedure is described in
the respective individual operating instructions (section 5 in the ring binder).
