13 what to do if, 1 calibration and measuring, Calibration and measuring – Xylem WQL-Cond CONDUCTIVITY DATALOGGERS User Manual
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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
).
– 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
Cause
Remedy
– Contamination in the area of
the electrodes
– Clean the conductivity measuring
cell (see section 12.2 E
).
– Calibration solution not suitable – Use suitable control standard