11
TROUBLESHOOTING
u
Power on but no display
1) Make sure the time of pressing
power key is more than 100 mS.
2) Check the battery are in place and
make good contact and correct
polarity.
3) Replace with new batteries and try
again.
4) Move away the batteries for one
minute and then put back again.
u
Slow response
Clean probe by immersing the elec-
trode in tap water for 10-15 minutes,
then rinse thoroughly with distilled wa-
ter or use a general purpose electrode
cleaner.
u
LCD display “ - - - “
Out of pH range, too
acidic/or too alkaline.
u
“H.” Or “L.”
Out of temp. range,
too cold/or too hot.
u
pH value fluctuate quickly
It is normal when the electrode is not
immersed in the water but exposed in
air.
ATC
C
O
ATC
C
O
28
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8
8
.
8
6
