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ProMinent
®
7
Troubleshooting
IMPORTANT
It is possible for water to escape and spray arround. Take appropriate measures,
if necessary.
Failure:
the float does not show the correct flow rate or has become stuck
Reason:
dirt in the water in the in-line probe housing module
Remedy:
clean the module and the float using a cloth and test tube brush, or other similar
item, and, if necessary, insert a filter
IMPORTANT
Do not use chemical cleaning agents! They may attack the DGMa!
Reason:
the in-line probe housing module is not completely straight
Remedy:
install the in-line probe housing module so that it is vertical
Failure:
the flow sensor contact does not open
Reason:
the reed contact has jammed because the electrical voltage was too high
(even if only for a short period)
Remedy:
reduce the voltage using a protective resistor and replace the flow sensor
Failure:
the reading produced by a pH or redox sensor is unstable. It cannot be calibrated.
Reason:
a potential equaliser pin has not been connected although the measurement and
control system has been prepared for it.
Remedy:
connect a potential equaliser pin (use an equipotential plug)
Reason:
the measurement and control system has not been prepared for measurement with
a potential equaliser pin (e.g. there is no jumper in the system)
Remedy:
prepare the measurement and control system for this type of measurement
(e.g. jumper two terminals in the system)
Reason:
the measurement and control system has not been prepared for measurement
without a potential equaliser pin (e.g. terminals 9 and 10 in the DULCOMETER
have not been jumpered)
Remedy:
prepare the measurement and control system for this type of measurement
(e.g. connect a jumper in the system)
Reason:
the sensor is dirty, defective or requires regeneration
Remedy:
clean, replace or regenerate the sensor (please refer to the sensor operating manual)
Failure:
there is air in the in-line probe housing
Reason:
the in-line probe housing has been installed incorrectly
Remedy:
install the in-line probe housing correctly (please refer to the "Installation" section)
Open the stop valves fully and increase the flow rate to a maximum of 100 l/h until
the air is forced out of the in-line probe housing
Failure:
the sampling tap does not release any water
Reason:
positive suction pressure in the in-line probe housing
Remedy:
install the in-line probe housing correctly (please refer to the "Installation" section)
Failure:
the flow changes over a few hours
Reason:
the module admission pressure is not constant
Remedy:
check the function of the pump in front of the in-line probe housing.
Check that the pump has been installed correctly.
Troubleshooting
®
D1C
Page 29
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