General Topics - wtw inoLab Multi 9310 IDS Operating Manual

®
inoLab Multi 9310 IDS
Error message,
OFL
Measured values too
low
Measured values too
high
Sensor symbol
flashes
ba75937e10 08/2021
Cause
– Incorrect calibration,e.g.:
– Unsuitable calibration stan-
dard solutions (e.g. too old)
– Unsuitable calibration envi-
ronment (e.g. gas bubbles,
reflection, light)
– Minimum depth of immersion not
observed
Cause
– Measured value outside the
measuring range
Cause
– Measurement window soiled
Cause
– Reflection at the walls or bottom
of the measuring vessel
– Incidence of light
More information and instructions on cleaning and
exchange of sensors are given in the documentation of
your sensor.

15.5 General topics

Cause
– Calibration interval expired
Remedy
– Check the calibration
– Heed the minimum depth of
immersion of the sensor
(2 cm)
Remedy
– Select a suitable measuring
medium
Remedy
– Clean the measurement
window
Remedy
– Keep the minimum distance
of the sensor towards the
walls and bottom of the
measuring vessel (see sec-
tion 9.1.1 M
EASURING THE
, page 62)
TURBIDITY
– Use a light-proof measuring
vessel
Remedy
– Recalibrate the measuring system
What to do if...
101