Conductivity; Turbidity - wtw inoLab Multi 9310 IDS Operating Manual

What to do if...
Error message,
Error
Error message
OFL, UFL
Error message,
Error
Implausible turbidity
values
100
Cause
– Sensor contaminated
– Measured temperature value
outside the operating conditions
(display of OFL/UFL instead of a
temperature value)
– Defective sensor
– Calibration failed
– D.O. concentration during zero
point calibration too high.

15.3 Conductivity

More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
The measured value is outside the measuring range.
Cause
– Measured value outside the
measuring range
Cause
– Sensor contaminated
– Calibration solution not suitable

15.4 Turbidity

Cause
– There are gas bubbles (e.g. air
bubbles) in front of the measure-
ment window
inoLab
Remedy
– Clean the sensor
– Keep to the temperature range for
the test sample
– Calibration
– Exchange the sensor cap
– Replace the sensor
– Recalibrate
– Immerse the sensor in an oxygen-
free solution
Remedy
– Use suitable IDS conductivity sensor
Remedy
– Clean the sensor and replace it if
necessary
– Check the calibration solutions
Remedy
– Remove the gas bubbles,
e.g.
by immersing the sensor at
an angle
ba75937e10
®
Multi 9310 IDS
08/2021