User manual

CO230-en-GB_v1.0 1/16
2
Introduction
Thank you for selecting the Model CO230 Carbon Dioxide Monitor. This
meter measures CO
2
concentration, air temperature, dew point, wet bulb
temperature and relative humidity.
The audio-visual alarm and alarm relay output make this is an ideal
instrument for indoor air quality (IAQ) diagnostics. Carbon dioxide (CO
2
)
is a gaseous component of the earth’s atmosphere. The concentration of
CO
2
in natural ambient air is approximately 0.04% or 400ppm.
The NDIR (non-dispersive infrared) sensor provides stable, long term
monitoring.
This meter is shipped fully tested and calibrated and, with proper use,
will provide years of reliable service. Please visit our website
(www.extech.com) to check for the latest version of this User Guide,
Product Updates, and Customer Support.
FEATURES
 LCD simultaneously displays CO
2
Level, Relative Humidity, and
Temperature (air, dew point, or wet bulb)
 Stable NDIR sensor for CO
2
detection
 Weighted averaging: TWA (8 hours) & STEL (15 minutes)
 Automatic Baseline Calibration (ABC). Can be disabled for use in
areas with continuously elevated CO
2
levels (>400ppm)
 Manual CO
2
calibration
 Audio-visual CO
2
concentration warning alarm
 Dew Point and Wet Bulb temperature calculations
 Relay output for connecting external indicators or controllers