wtw Multi 3620 IDS - 15.3 Dissolved oxygen

What to do if... Multi 3620 IDS
107 ba77169e01 04/2016
Obviously incorrect
measured values
15.3 Dissolved oxygen
Error message,
OFL
Error message,
Error
15.4 Conductivity
Error message,
OFL
Error message,
Error
Cause Remedy
IDS-pH sensor:
– IDS-pH sensor unsuitable – Use suitable IDS sensor
– Temperature difference
between buffer and test sample
too great
– Adjust temperature of buffer or sam-
ple solutions
– Measurement procedure not
suitable
– Follow special procedure
Cause Remedy
– Measured value outside the
measuring range
– Select a suitable measuring medium
Cause Remedy
– Sensor contaminated – Clean the sensor
– Measured temperature value
outside the operating conditions
(display of OFL/UFL instead of a
temperature value)
– Keep to the temperature range for
the test sample
– Defective sensor – Replace the sensor
More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
Cause Remedy
– Measured value outside the
measuring range
– Use suitable IDS conductivity sen-
sor
Cause Remedy
– Sensor contaminated – Clean the sensor and replace it if
necessary
– Calibration solution not suitable – Check the calibration solutions