19. Operation and Maintenance of Neon
®
pR
99
Dr. A. Kuntze
I
Gutes Wasser mit System
Robert-Bosch-Str. 7a
40668 Meerbusch
+49 (0) 2150-7066-0 / Fax -60
www.kuntze.com
19.2.2. Cleaning of assemblies, filters, etc.
An important part of maintenance is the cleaning of all parts that come in contact with the water.
Besides the sensors, this includes assemblies, pipes and tubes, filters, flow meters, cocks, valves etc.
Coatings, deposits, and biofilm can adulterate the measurement, impede the water flow and at worst
even damage the sensor.
Attention
We recommend to use only water and perhaps a soft brush for cleaning.
Many synthetic materials are affected by acids or organic solvents!
19.2.3. Checking the gaskets
Especially in pressurized applications all gaskets and sealing rings must be checked regularly and
replaced at needs. Make sure to use only spare parts consistent with your application and your
equipment. Check the proper placement before reapplying pressure!
19.2.4. Testing the safety features
Regularly test all safety features, especially when using control functions. Check the function of water
level or flow sensors and verify that the controller is automatically shut down in a low-water situation.
Simulate such an event by impeding the water flow temporarily or by lifting the level sensor out of the
water. Switching of the level sensor or loss of the flow signal has to lead to the text message “low
water” or “level” or “ext. controller stop” according to settings, and to an automatic controller stop.
Regularly test the function of the alarm relay and ensure that in case of an alarm, the instrument issues
the alarm and the connected control center registers the alarm correctly. With the aid of the test menu,
such test is easily accomplished.
Note
In the Hold mode, the alarm function is deactivated.
19.2.5. Exchange of consumables
Wearing parts in conductivity measurements are the seals. The sensors do not contain liquids and the
electrodes are made from materials that do not age, expect through rough treatment such as abrasive
cleaning or corrosion, and are therefore not considered wearing parts. Treatment-caused changes are
apparent in the info list of calibration menu – if the measurement required regular recalibration and the
C value results show a downward or upward trend, an exchange of the sensor will be necessary in the
near future.
If you have to exchange a sensor, make sure that the new sensor fits your application and requirements
and the instrument settings. Mind that you might have to calibrate after changing the sensor. Calibration
will probably also be necessary if you exchange an instrument.
Note
Cables also tend to wear out, especially if they are frequently unplugged.
Find more information in the “ Trouble-Shooting”
