Electrode Care And Maintenance; Troubleshooting - Oakton pH 5 Instruction Manual

Instruction Manual

5. ELECTRODE CARE AND MAINTENANCE

For best results, keep the ISE capped dry and pH/ORP electrode bulb wet. Store the
pH/ORP glass bulb with pH electrode storage solution. NEVER use deionised water for
storage. Wash electrodes with clean water after each use.
Your ISE or pH electrode is susceptible to contamination or dirt. Clean as needed using
mild detergent and warm water. Blot the probe gently with a soft tissue paper. Avoid
excessive drying of the glass membrane and avoid touching it with your fingers.
Recalibrate after cleaning.

6. TROUBLESHOOTING

Problem
No display
"---" on
display
"LO" displays
in the LCD
Unstable
reading
"Er1" display
"Er2" display
"Er3" display
"Er4" display
Not able to
calibrate
Cause
Batteries not in place.
Ion 6+ does not have 2
point calibration
Low battery
a) Electrode not deep
enough in sample
b) Dirty electrode.
c) Broken electrode
Buffer value out of
tolerance
Single point calibration
ISE slope not within the
specified tolerance
Any calibration points
not within 1 decade
a) Display freezes
b) Faulty electrode
c) Inaccurate buffer
a) Insert batteries.
b) Re-insert batteries in correct polarity.
Perform 2 or 3 point ion calibration.
Replace batteries.
a) Place electrode deeper in sample.
b) Clean electrode and recalibrate.
c) Replace electrode.
Use new pH buffer solution and recalibrate. Ensure
correct pH buffer group was selected.
Perform at least 2 point calibration. (Ion 6+).
Check ISE is in good working condition-refer to ISE
manual (Ion 6+).
Ensure any calibration points between each other
must be within 1 decade. (Ion 6+)
a) Release reading by pressing HOLD.
b) Replace electrode.
c) Replace expired buffer solutions.
-16-
pH 5+, pH 6+, Ion 6+
Solution