6
Fig. H
1. Power on the meter.
2. Short press key to enter pH
calibration mode, you will first see "
4.00
" on the LCD readout. ( Fig. G ).
3.
NOTE:
If the buffer is incorrectly inserted or
the probe is damaged, "
CAL
" will not
flash on above "
ATC
" .(See Fig.G )
4. After about 60 "
CAL
" flashes or 60 sec-
onds, the meter will automatically save
and "
SA
" shows for one second, then
skip to next calibration point without
pressing any button .
5. At the moment, the screen shows
7.00
(Fig.H),
CAL
is not flashing until you
remove the meter to the correct calibra-
tion buffer.
CAL
again flash repeatedly
about another 30 seconds, then save
the calibration point automatically: "
SA
"
shows for 1 second and skip to "
10.00
"
(remember to use the correct buffer),
"
CAL
" is flashing again .(See Fig. I )
ATC
CAL
C
Calibration is necessary and should
be done regularly, recommend every
day if the meter is used very often.
CALIBRATION MODE (CAL)
CAL
