Thermo Fisher Scientific EcoScan pH/Ion 5 & 6 - Manual (Page 21)

Instruction Manual pH 5/6 & Ion 5/6
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5. ELECTRODE CARE AND MAINTENANCE
For best results, always keep the ISE capped dry and pH/ORP electrode bulb
wet. Store the pH/ORP glass bulb with pH electrode storage solution. Other pH
buffers are also suitable. NEVER use deionised water for storage. Wash the
probes thoroughly with distilled water after each use. Because your ISE or pH
electrode is susceptible to contamination or dirt, clean it every 1 to 2 months
depending on extent and condition of use.
Clean the pH/ORP electrode using a mild detergent. Wipe the probe with a soft
tissue paper. Avoid touching the glass membrane with your fingers. Wash
thoroughly in tap water and then in distilled water. Recalibrate the meter after
cleaning the electrode.
6. TROUBLESHOOTING
Problem Cause Solution
No display Batteries not in place. a) Insert batteries.
b) Re-insert batteries in correct polarity.
“LO” displays
in the LCD Low battery Replace batteries with fresh ones.
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.
“Er2” display Single point calibration Perform at least 2 point calibration (for Ion
5/6).
“Er3” display ISE slope not within the
specified tolerance Check ISE is in good working condition
(for Ion 5/6).
“Er4” display Any calibration points
not within 1 decade Ensure any calibration points between
each other must be within 1 decade (for
Ion 5/6).
Not able to
calibrate a) Display freezes
b) Faulty electrode
a) Release reading by pressing HOLD
key.
b) Replace electrode.