
52
13 TROUBLE-SHOOTING
PROBLEM
PROBABLY CAUSE
REMEDIAL ACTION
Nothing is displayed when the
ON/OFF key is selected.
1.
Batteries not in place.
2.
Batteries (+ & - poles) not in
correct polarity.
3. Weak
batteries.
1. Insert
batteries.
2.
Re-insert batteries in the
correct polarity.
3.
Replace batteries or attach
AC adapter.
Unstable reading
1.
Insufficient reference
electrolyte in electrode.
2. Broken
electrode.
3.
External “noises” or induction
(e.g. electrical ‘noise’ caused
by a nearby motor).
4. Dirty
electrode.
1.
Fill electrode with reference
electrolyte.
2. Replace
electrode.
3.
Remove or switch off
interfering device.
4.
Clean the electrode.
Rejuvenate if necessary.
Slow responses.
1.
Dirty electrode.
1.
Clean electrode. Rejuvenate
if necessary.
Meter is not responding to key
press.
1.
HOLD mode in operation.
2. Broken
electrode.
3. Internal
program
error.
1.
Cancel HOLD mode.
2. Replace
electrode.
3.
Reset all internal programs
by re-inserting battery.