wtw inoLab Multi 9620 IDS User Manual

inoLab
®
Multi 9620 IDS What to do if...
ba77173e04 12/2017 129
15.5 Turbidity
Implausible turbidity
values
Error message,
OFL
Measured values too
low
Measured values too
high
Cause Remedy
– There are gas bubbles (e.g. air
bubbles) in front of the measure-
ment window
– Remove the gas bubbles,
e.g.
by immersing the sensor at
an angle
– Incorrect calibration,e.g.:
– Unsuitable calibration stan-
dard solutions (e.g. too old)
– Unsuitable calibration envi-
ronment (e.g. gas bubbles,
reflection, light)
– Check the calibration
– Minimum depth of immersion not
observed
– Heed the minimum depth of
immersion of the sensor
(2 cm)
Cause Remedy
– Measured value outside the
measuring range
– Select a suitable measuring
medium
Cause Remedy
– Measurement window soiled – Clean the measurement
window
Cause Remedy
– Reflection at the walls or bottom
of the measuring vessel
– Keep the minimum distance
of the sensor towards the
walls and bottom of the
measuring vessel (see sec-
tion 15.5 T
URBIDITY, page
129)
– Incidence of light – Use a light-proof measuring
vessel
More information and instructions on cleaning and
exchange of sensors are given in the documentation of
your sensor.

wtw inoLab Multi 9620 IDS Specifications

General

Brand	wtw
Model	inoLab Multi 9620 IDS
Category	Measuring Instruments
Language	English