Maintenance
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© Lutz-Jesco GmbH 2020
BA-42840-02-V03
Water sampling station
EASYPRO COMPACT
Operating instructions
11 Maintenance
Products by Lutz-Jesco are manufactured to the highest quality standards
and have a long service life. However, some parts are subject to opera-
tional wear. This means that regular visual inspections are necessary to
ensure a long operating life. Regular maintenance will protect the device
from operation interruptions.
DANGER!
Mortal danger from electric shock!
Live parts can inflict fatal injuries.
ð
Before carrying out any maintenance work, always disconnect the
device from the power supply.
ð
Secure the system to prevent it from being switched on by
accident.
WARNING!
Increased risk of accidents due to insufficient qualifica-
tion of personnel!
The system and its accessories may only be installed, operated and
maintained by personnel with sufficient qualifications. Insufficient
qualification will increase the risk of accidents.
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Ensure that all action is taken only by personnel with sufficient and
corresponding qualifications.
11.1 Maintenance intervals
The device require regular maintenance to prevent errors. This table gives
you an overview of maintenance work and the intervals at which you
must carry it out. The next few sections contain instructions for carrying
out this work.
Interval
Maintenance
daily
n
Visual inspection of all components
Weekly
n
Check measured values
n
Recalibrate sensor inputs if necessary
n
Visual inspection of the sample water filter
n
If necessary, cleaning of the sample water filter
Monthly
n
Touchscreen function test
n
Calibrating the measured values
Annually
n
Checking the button cell
n
Cleaning the valves
n
Replacing the measuring cells
n
Replacing the sample water filter
n
Cleaning of water guiding components
n
Seal replacement
Tab. 30: Maintenance intervals
11.2 Measuring cells
PLEASE NOTE
Note the service life of the measuring cells
The service life of the measuring cells is approx. 12 to 15 months,
whereby the storage time must be taken into account at 50 %. If the
service life is exceeded, this may distort measurement results.
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Note the printed date of manufacture and replace obsolete
measuring cells in good time.
The service life of the single-rod measuring cells depends on the operat-
ing conditions and the water properties (e.g. corrosiveness, grease etc.).
The counter electrode of the disinfection measuring cell can have a ser-
vice life of up to several years, depending on the corrosiveness and the
abrasiveness of the water. It must only be replaced when heavy signs of
wear appear.
The following features indicated used pH single-rod measuring
cells:
n
The pH single-rod measuring cell takes an extraordinarily long time
during the pH 6.8 adjustment process to reach the value of the buffer
solution.
n
The deviation of the pH single-rod measuring cell is too wide; the pH
6.8 adjustment is not possible.
n
The white potassium chloride salt rings in the pH single-rod measur-
ing cell are exhausted or discoloured.
11.3 Flow controller
The flow controller is fitted with a switching function via a reed switch. To
check the switch function, check the electrical conductivity of the reed
switch. The reed switch and the float must be located at the level of the
marking. If the switch function is not working properly, the reed switch
can be displaced in the compression fitting to perform fine tuning.
11.4 Cleaning the sample water filter
Perform the following work steps:
1.
Close the shut-off taps of the water sampling station.
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No more water is transported, the float in the flow meter will sink to
the bottom.
2.
Unscrew the transparent cover of the sample water filter.
3.
Clean the filter sieve thoroughly. Then rinse it with clear water.
4.
Re-insert the filter sieve.
5.
Screw the cover back on. Ensure the connection here is tight.
ü
The sample water filter has been cleaned successfully.
