Table of Contents
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Introduction
Thank you for selecting the Extech Instruments Model CO240. The CO240 measures Carbon
Dioxide (CO
), Air Temperature, and Relative Humidity. It also calculates Dew Point Temperature
2
and Wet Bulb Temperature. The user‐programmable high alarm feature alerts the user when
CO
level rises above the programmed limit and the data streaming feature allows readings to be
2
captured in real time by PC (USB connection). This device 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
Portable meter measures CO
Measures CO
Dual display indicates Relative Humidity/Air Temperature and CO
Calculates Dew Point and Wet Bulb Temperature
Adjustable CO
Tripod mount
USB cable for PC data streaming (software supplied)
Battery or AC Adaptor Powered
, Air Temperature, and Relative humidity accurately
2
(0~9,999ppm) using NDIR (Non‐dispersive Infrared Technology)
2
high alarm threshold with audible beeper
2
2
EXTECH INSTRUMENTS
2
CO240‐en‐GB_v1.7 11/16
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Table of Contents
Need help?
Do you have a question about the CO240 and is the answer not in the manual?
Questions and answers
No me mide la temperatura y el porcentaje de humedad
The Extech Instruments CO240 may not be measuring temperature and humidity due to one or more of the following reasons:
1. The device is not in the correct mode. Use the MODE button to switch to the appropriate display for temperature and humidity readings.
2. The sensor may be malfunctioning or obstructed. Ensure the sensor area is clean and not blocked.
3. The device may not be powered correctly. Check the AAA batteries or AC adaptor to ensure proper power supply.
4. The environmental conditions may be outside the specified operating range: temperature (−20 to 50°C) and humidity (0 to 95% RH, non-condensing).
5. The device may need to be reset or calibrated. Use the SET + UNIT buttons to enter calibration mode.
If none of these conditions apply, the device may require servicing.
This answer is automatically generated