Malfunctions - Ecolab ECOTRANS Notice Technique

9.

Malfunctions

Fault
pH 7 still shown on the display
despite the amended pH value
pH2 or pH 12 constantly shown
on the display
Great measurement fluctuations
The display cannot be set to the
buffer solution value during
calibration
Implausible measurement
Measurement changes if the
medium is flowing
417101733_Ecotrans.doc
Possible cause
Short circuit in the electrode
lead or humidity circuit in the
plug-and-socket connectors
Connecting lead between the
measuring cell and the
measuring amplifier interrupted
Air in the measuring water,
faults in the measuring line
Measuring chain old or
extremely dirty
The buffer solution using
during calibration was incorrect
or too old
Inflow velocity too high
- 24 -
Troubleshooting advice
Check the electrode cable in the
connector region; check the plug for
moisture; replace the cable if
necessary
Check the connecting lead and
replace if necessary
Check the measuring environment for
air inlets; check the measuring lead
sheath
Clean or, if necessary, replace the
measuring chain
Recalibrate using the right buffer
solution
Conduct a measurement in the
bypass and reduce the inflow
Rev. 2-03.10