19. Operation and Maintenance of Neon
®
pR
98
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. Operation and Maintenance of Neon
®
LF
19.1. Mode
Never carry out maintenance while the controller is set to automatic. Select either manual mode or
Hold.
In the manual mode only the controller is deactivated. All other functions such as the alarm relay and
the test functions are still active. This mode is ideally suited to test the wiring to your PLC and to check
the alarm functions.
With Hold, all alarm functions are deactivated. This mode is ideally suited to carry out maintenance
such as calibration without issuing an alarm. With Hold, the controller is deactivated, and all analog
and digital outputs are frozen to the last value, in case you are using these outputs as inputs for an
external control.
19.2. Maintenance of the measurement
Maintenance of the measurement comprises cleaning of the various components, regular testing of
safety features and gaskets, regular exchange of consumables.
Note
Maintenance intervals depend on the application, the installation, the accuracy
requirements etc.
Operation
Interval suggestion
Cleaning of sensors and assemblies
8 weeks
Cleaning of valves, filters, tubing etc.
8 weeks
Checking the gaskets
Weekly
Testing the safety features
2 weeks
Exchange of consumables
Six months / yearly
19.2.1. Cleaning of sensors
If the water contains substances that stick to the electrodes´ surfaces, they will affect the measurement,
since the measured value depends on the size of the active surface area. Make sure to remove such
coatings regularly.
Take care that the electrode surfaces are not damaged through mechanical or chemical cleaning.
Electrodes made of stainless steel get corroded by acids and lyes, and sensors with plastic body might
get damaged by organic solvents. To remove lime or hydroxides, use a mild acid such as citric acid
or vinegar or very diluted hydrochloric acid. To remove fat or grease, use a commercially available
dish detergent. Rinse thoroughly with water after cleaning and allow the measurement to settle after
reinstallation before restarting control.