Ionode IJ pH V5.1 - Manual (Page 39)

Ionode IJ Instruction Manual 39
Symptom Possible
Causes
Remedy
Not within
Tolerance
(±20mV) Contaminated
Standards Replace standards
Correlating to
the Wrong
Reference
Electrode Calculate what the
standard would
read using a
saturated KCl
Ag/AgCl reference.
See 5.1 ORP
Theory
Platinum not
Clean See 4.4.1 pH
Cleaning
Electrode
Polarised Replace electrode
Displays
0mV for
all
Solutions Electrical
Short Check connector
Internal Short Replace electrode
Displays
off Scale Noise See 5.5
Troubleshooting
Noisy