Extech Instruments CO220 User Manual page 2

Introduction
Congratulations on your purchase of the Model CO220 Carbon Dioxide Meter. This meter
measures CO concentration, air temperature, and relative humidity. The CO200 includes a 99
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Memory Datalogger for storing and retrieving readings with date and time stamping.
The audible alarms make this is an ideal instrument for indoor air quality (IAQ) diagnostics.
Carbon dioxide (CO
CO in natural ambient air is approximately 0.04% or 400ppm.
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This meter is shipped fully tested and calibrated and, with proper use, will provide years of
reliable service. Please visit our website to check for the latest version of this User Guide,
Product Updates, and Customer Support.
FEATURES
 Extra Large LCD simultaneously displays CO
 Displayed Calendar Clock.
 Six (6) icons indicate indoor air quality levels (350 / 450 / 700 / 1000 / 1250 / 5000ppm)
 Stable NDIR sensor for CO
 Automatic Baseline Calibration (ABC) function
 Audible high CO
 Dew Point and Wet Bulb temperature measurements
Descriptions
METER
1. CO reading
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2. Relative Humidity Reading
3. Air Temperature Reading
4. Time/Date Display
5. SET button
6. ESC – MEM button
7. SELECT – RECALL button
8. C/F ‐ %RH button
9. CO button
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10. AC adaptor jack
NOTE: CO , Temperature and RH sensors on rear of instrument
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) is a gaseous component of the earth's atmosphere. The concentration of
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detection
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concentration alarm with selectable high alarm threshold
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Level, Air Temperature, & Relative Humidity
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2 CO220-EU-EN V1.3 07/13