Ionode IJ pH V5.1 - Manual (Page 38)

Ionode IJ Instruction Manual 38
5.5. Troubleshooting
A fault may develop in either the meter or
electrode. If a number of electrodes and/or
meters are available, interchange to isolate the
fault.
Table 10: Problem Indication
Symptom
Possible
Causes
Remedy
Drift Junction
Blocked Remove sleeve.
Clean glass stem
and sleeve. See 3.
Preparation
Sensor not
Clean See 4.4.1 Cleaning
Reading is
Stable in
Standards,
but not in
Samples See 5.1 ORP
Theory
Electrode
Polarised Replace electrode
Noisy Poor
Connection to
Meter Check connection
Junction not
Immersed Lower electrode
into solution below
level of junction.
See
Figure 6
Insufficient
Electrolyte See 3. Preparation