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