SCHOTT Instruments ProLab 2000 - 6 What to Do if; Ph and ORP Measurement

ProLab 2000 What to do if...
97
ba75577e03 11/2009
6 What to do if...
6.1 pH and ORP measurement
Error message
Err1
Error message
Err2
Error message
Err4
Error message
CalError
Cause Remedy
pH electrode:
– Measured value outside the
measuring range
– Use a suitable electrode
– Air bubble in front of the
junction
– Remove air bubble
– Air in the junction – Extract air or moisten
junction
– Cable broken – Replace electrode
– Gel electrolyte dried out – Replace electrode
Cause Remedy
– No electrode connected – Connect electrode
– Setting time during calibration
too long
– Adjust temperature if
necessary
– Recalibrate
Cause Remedy
– Temperature not stable during
calibration.
– Adjust temperature if
necessary
– Recalibrate
Cause Remedy
pH electrode:
– The values determined for zero
point and slope of the electrode
are outside the allowed limits.
– Recalibrate
– Junction contaminated – Clean junction
– Electrode broken – Replace electrode