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CALIBRATION
For best results, perform the calibration
procedure in a large and ventilated
environment:
Note…
The oxygen value of air (20.9%) is
used for calibration.
1. Press
POWER
to turn the meter
on
.
2. Wait at least 3 minutes until the
displayed reading becomes stable
and shows no fluctuation.
3. Press
HOLD
and
REC
simultaneously until “CAL” appears
on the primary display of the LCD.
(The secondary display will show
20.9.)
4. Release
HOLD
and
REC
. “CAL will
flash on the LCD for several
Содержание 800047
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