ECOLAB EcoTrans II pH Betriebsanleitung Seite 105

10 Malfunctions and troubleshooting
Fault description
The display shows 'PROBE
ERROR' .
Display still shows pH 7 despite
the changed pH value
Display constantly shows pH 0 or
pH 14
Large measurement fluctuations
The display cannot be set to
the buffer solution value during
calibration
Implausible measurement
Measurement changes if the
medium is flowing
Cause
No measuring cell connected
Connecting lead between the measuring
cell and the measurement amplifier
interrupted
Short circuit in the electrode lead or
humidity short in the plug-and-socket
connectors
Connecting lead between the measuring
cell and the measurement 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
49
Malfunctions and troubleshooting
Remedy
Connect measuring cell
Check the connecting lead and
replace if necessary
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 correct buffer
solution
Conduct a measurement in the
bypass and reduce the inflow
MAN052993 Rev 2-01.2024