Xylem IQ SensorNet ViSolid 700 IQ (SW) - Manual (Page 44)

What to do if ... ViSolid
®
700 IQ (SW)
6 - 2 ba76040e02 07/2013
Measured value
fluctuating heavily
Measured values too low
Measured values too
high
Cause Remedy
– There are bubbles of gas in the
medium in front of the
measurement windows
– Check the installation
position of the sensor (see
section 3.3 and section 3.4)
– Signal averaging time too short
for low values of total suspended
solids
– Inhomogeneous measuring
medium
– Increase signal averaging
time
Cause Remedy
– Measurement window dirty – Clean the measurement
window (see section 5.2)
Cause Remedy
– There are bubbles of gas in the
medium in front of the
measurement windows
– Check the installation
position of the sensor (see
section 3.3 and section 3.4)
– Light scattering on the walls – Check the installation
position of the sensor (see
section 3.3 and section 3.4)
– If necessary, compensate
for any effects that cannot
be cleared by calibration
– Measurement window dirty – Clean the measurement
window (see section 5.2)