5
Operation
The flow sensor has been factory-tested before delivery. It is ready to use as soon as it has
been mounted and the electrical leads connected.
When it is in use, one LED in the connector lights up as long as there is a continuous flow of
fluid through the measuring unit.
IMPORTANT! Comply with the permissible limits!
The flow sensor must only be operated within the permitted limits (
ta").
6
Problems and returns
If the flow sensor is not operating perfectly, first check the electrical components while the
unit is operating.
This work may only be done by a qualified electrician.
Problems:
The following table details what problems you can solve yourself and how to solve them.
Problems
Possible cause
Remedy
The LED on the flow sensor is
lit but the values displayed are
wrong.
Faulty connection between the
flow sensor and the analysing
unit.
Check the connection and replace
the cable or connector if neces-
sary.
The LED display does not illu-
minate during operation (there
is definitely media flow).
Damaged wiring between sensor
and circuit board.
Send the meter to the manufac-
turer for repair.
The sensor is defective.
The preamplifier is defective.
Check preamplifier and replace if
necessary.
Failure of the supply voltage.
Check supply cable and fuses.
Measuring unit is blocked.
Switch off the volume sensor
immediately!
The volume sensor can be dis-
mounted and cleaned (
"Clean-
ing").
Leakage, escaping medium
Leaking o-ring in housing.
Check the compatibility of the
seal, consult the manufacturer if
necessary and install a new o-ring
(only with VZ 2 AL) or let install by
manufacturer.
