YSI VisoTurb 700 IQ - Manual (Page 37)

VisoTurb
®
700 IQ (SW) What to do if ...
6 - 1 ba76039e01 01/2012
6 What to do if ...
The sensor
automatically switches
itself on and off
periodically after
commissioning
Mechanical damage to
the sensor
Display of OFL
Display of "----"
Measured value
fluctuating heavily
Measured values too low
Cause Remedy
– The available power is
sufficient for the initialization of
the sensor, but not for the
operation of the cleaning
system. As soon as this is
switched on, communication
with the controller is
interrupted.
– Install another power supply
module as close as possible
to the VisoTurb
®
700 IQ (SW)
Cause Remedy
– Return the sensor
Cause Remedy
– Measuring range exceeded – See log book
Cause Remedy
– Measured value invalid – See log book
Cause Remedy
– Gas bubbles in the medium are
in front of the sapphire disc
– Check the installation position
of the sensor (see section 3.2
and section 3.3)
– Signal averaging time too short
for low values of turbidity
– Increase signal averaging
time
Cause Remedy
– Sapphire disc polluted – Clean sapphire disc (see
section 5.2)