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HYDRO’pH
®
,
HYDR’ORP
®
,
HYDRO’pH Duo
®
and
HYDRO’pH/ORP
®
instructions
10
Failures and remedies
Failures and possible causes
NOTE:
In case of malfunction on the external sensors, contact your after
sales service.
Failure
Cause
Remède
The displays do not light up
after switching on. No lights are
on.
Primary power supply faulty
Check the fuse of the primary
power supply.
Check the power cable.
When powering, sensor (s) do
not measure (s) or displayed
values are crazy.
Cable sensors offline
Faulty sensor
Check the sensor cable
Check the BNC connector
Change the sensor
The sensor shows a maximum
value at all times.
Sensor cable cut
Faulty sensor
Check your connections or
replace the faulty sensor
Continuing instability of the
measurement sensor.
Worn or defective sensor
Presence of air in the filtration
External interference
Change the sensor.
Check the priming of filtration.
Unable to calibrate the sensor.
Poor electrode or unstable
measurement
Change the electrode and check
the priming of filtration.
Disturbed and unstable control.
Incorrect parameters setting
Check the program settings.
Check the behaviour of the site
and adjust the control parameters.
Proportioning devices do not
assay.
Controller safekeeping
Check the errors displayed.
Check the operating limit
exceeded.