Co2meter 7752, Руководство по эксплуатации

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8
CO CALIBRATION
2
CAUTION:
Do not calibrate the meter in the air
with unknown CO concentration.
2
Otherwise, it will be calibrated as
400ppm by default and leads to
inaccurate measurements.
CAL
Esc
CO
2
Fig. 14
NOTE:
Ensure the batteries are with full voltage
during the calibration to prevent from
interruption or failed calibration.
The manual calibration is suggested to
to be done in fresh outdoor air that is
well ventilated and in sunny weather.
Place the meter in the calibration site.
Turn on the meter and hold down
and simultaneously to enter CO
2
calibration mode (Fig.14). 400ppm and
“CAL” are blinking on the LCD while
performing calibration.
Wait about 5 minutes until the blinking
stops and the calibration is completed
automatically and back to normal mode.
To abort the calibration, turn off the
meter at any time.
The meter is calibrated at standard
400ppm CO concentration in factory.
2
It’s suggested to do manual calibration
regularly to maintain good accuracy.
Note:
When the accuracy becomes a concern
after a long time usage, return to dealers
for standard calibration.