Calibration is necessary and should be
done regularly, recommended everyday
if the meter is used often. The unique
calibration design of the meter features
automatic buffer recognition to avoid errors.
CALIBRATION MODE (CAL)
7
1. Power on the meter.
2. Place the electrode into a buffer solution
(4,7or10), pH7 should be calibrated first
and then 4 or 10 pH for better accuracy
3
. Press " " or " CAL " to enter pH
calibration mode. The text "CA" ( for
8686 is "CAL") will appear on the LCD
for one second and then pH value
(4,7 or 10) will be displayed on the LCD.
8684 /8685/8686 Calibration
8686
4. If probe or buffer is in error:
If the buffer is incorrectly inserted or
the probe is damaged or the probe
can not detect buffer in below voltage
range, the meter will escape calibration
mode automatically after 10 seconds.
Text "En" or "End" (8686)
will appear on the LCD
in one second and then
will go back to normal
status.
ATC
C
Cal
