Troubleshooting
43
© Lutz-Jesco GmbH 2020
Subject to technical changes.
200116
BA-42840-02-V03
Water sampling station
EASYPRO COMPACT
Operating instructions
12 Troubleshooting
See below for information about how to rectify faults on the device or the system. If you cannot eliminate the fault, please consult with the manufacturer
on further measures or return the device for repair.
Fault
Possible causes
Measures for resolution
Balls in the disinfection
measuring cell rotate too
weakly or float does not
float
Water inflow pressure too low
n
Lay sample water pipe with larger cross-section
n
Installation of a sample water pump
Sample water filter soiled
Clean or replace the filter sieve.
The float floats but the reed
switch does not switch upon
connection.
Harmonisation between the float and reed
switch is incorrect.
Calibrate reed switch
Reed contact defective
Replace reed contact
Display fluctuates during
the excess chlorine
measurement of the
connected measurement
amplifier
Fluctuating pH value influences the chlorine
measurement
Stabilise the pH value in the water
(e.g. optimise control path, controller parameters)
“Sample water shortage”
display on the measurement
device.
Reed switch in the flow control defective
Replace reed switch
Inflow tap (Fig. 1 “Water sampling station
EASYPRO COMPACT” on page 8, pos. 8)
closed.
Open the inflow tap (Fig. 1 “Water sampling station EASYPRO
COMPACT” on page 8, pos. 8).
Sample water flow dirty
Check the visible parts and filter (Fig. 1 “Water sampling station
EASYPRO COMPACT” on page 8, pos. 9) for soiling and clean if
necessary.
Measured value fluctuates
constantly
Loose measurement cable connections
Check measurement cable; re-attach if necessary
Measurement is very slow
Diaphragm blocked
Clean electrode
Insufficient swelling layer on the glass
membrane.
Douse electrode in 3-molar KCI solution
Electrode becoming obsolete
Replace electrode
Buffer solution becoming obsolete
Check expiration date
The measurement deviates
or is unstable
pH value measuring cell defective
Clean measuring cell
Diaphragm is dry and/or soiled
Check correct installation; check correct calibration
The display deviates by a
constant value
External potential in the system
Remove external potential
pH value measuring cell not correctly
installed
Check correct installation; check correct calibration
TOPAX
®
MC
controller
constantly displays pH value
"7.00".
Short circuit
Check measuring cell for damage and replace if necessary
No reaction to pH buffer
solution
Measuring cell not correctly installed
Check correct installation; check correct calibration
Measuring cell defective
Check measuring cell for damage and replace if necessary
Value for "free chlorine"
fluctuates heavily
pH-value instability
Check pH value measurement
Tab. 31: Troubleshooting
EASYPRO COMPACT
water sampling station
