Extech Instruments CO210 User Manual page 7

P5.0 Data Logger Sampling Rate
Press the ▲ button in P1.0 three times to access P5.0 to set the data logger sample rate. The
available range is 1 second to 4 hours, 59 minutes, 59 seconds.
Press the SET button to access P5.1, the HOUR digits will blink. To change the hour, press the ▲
or ▼ button. Press the SET button to save the setting and then repeat this procedure for P5.2
MINUTES and P5.3 SECONDS (the SECONDS value is shown in the center display area). Press the
ESC button return to P5.0 without saving the setting.
Calibration
The meter is calibrated to a 400ppm CO
concern, or after one year of use, return the meter to Extech for calibration or continue below.
ABC (Automatic Baseline CO
ABC (Automatic Baseline Calibration) establishes a baseline calibration to eliminate the zero drift
of the infrared sensor. The ABC function is always "ON" when the meter is powered.
ABC is designed to calibrate the meter at the minimum CO
continuous monitoring (power on). It assumes that the area being tested receives fresh air with
a CO level of approximately 400ppm at some point during the monitoring period. Note that It is
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not suitable to use the CO210 in closed areas with consistently high CO
Manual CO Calibration
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Manual calibration is suggested to be done outdoors on a clear day with good ventilation and
fresh air where the CO
high humidity will affect the CO
CAUTION: Do not calibrate the meter in an atmosphere of unknown CO
calibrate in places crowded with people, pets, plants, or where high CO
exist such as near ventilation ducts or fireplaces.
Place the meter in the calibration area and switch it on. Press and hold
the SET, ▲, and ▼ buttons simultaneously for > 1 second to enter CO
calibration mode. "400ppm" and "CO
in process.
The calibration will require approximately five (5) minutes. When the calibration is complete, the
blinking stops and the meter returns to the normal operating mode. Press ESC to abort a
calibration session (not recommended).
concentration at the factory. If the accuracy becomes a
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Calibration)
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level is approximately 400 ppm. Do not calibrate on a rainy day because
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level in air.
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" will blink while the calibration is
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reading detected over 7.5 days of
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7
levels 24 hours a day.
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concentration. Do not
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concentrations may
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