Owner's manual

WQL-Cond What to do if...
185
ba75822e01 03/2011
13 What to do if...
13.1 Calibration and measuring
Unstable
measured values
Implausible
measured values
Incorrect
temperature
display
Logger does not
react
System cannot be
calibrated
Cause Remedy
– No stable measured value – Provide stable measuring
conditions (e.g. temperature)
– Use a shorter USB cable
– USB-Hub or USB connection
at the PC faulty or defective
– Use other USB connection or PC
Cause Remedy
– Measuring range exceeded – Make sure the logger is suitable
for the application
– Contamination in the area of
the electrodes
– Clean the conductivity measuring
cell (see section 12.2 E
XTERIOR
CLEANING).
– Electrodes damaged – Return the logger
Cause Remedy
– The temperature sensor is not
immersed deep enough in the
measuring solution
– Observe the minimum immersion
depth
– Temperature sensor defective – Return the logger
Cause Remedy
– Battery depleted – Insert new battery (see section
12.3)
Cause Remedy
– Contamination in the area of
the electrodes
– Clean the conductivity measuring
cell (see section 12.2 E
XTERIOR
CLEANING).
– Calibration solution not suitable – Use suitable control standard