Xylem ProLab 1000 BENCH TOP pH METER - Manual (Page 81)

ProLab 1000 What to do if...
81 ba75576e04 01/2011
CalClock flashes
6.2 ISE measurement
Error message Err1
Obviously incorrect
measured values
Error message, Error
(invalid
calibration)
– Measurement procedure not
suitable
– Follow special procedure
Cause Remedy
Cause Remedy
– Calibration interval expired – Recalibrate the measuring
system
Cause Remedy
– Measuring range exceeded – Dilute test sample
Cause Remedy
– Electrode not connected – Connect electrode
– Cable broken – Replace electrode
Cause Remedy
ISE electrode:
– Moisture in the plug – Dry plug
– Electrode obsolete – Replace electrode
– Electrode unsuitable for the
range to be measured
– Use suitable electrode
– Socket damp – Dry socket
Calibration procedure:
– Wrong sequence of standards
for three point calibration
– Select correct sequence
– Calibration standards do not
have the correct temperature
(max.
± 2 °C temperature
difference)
– Adjust the temperature of
the calibration standards