EXTECH Desktop Indoor Air Quality Monitor User Manual
- June 7, 2024
- EXTECH
Table of Contents
EXTECH Desktop Indoor Air Quality Monitor
Introduction
Congratulations on your purchase of this Extech Meter. The Carbon Dioxide (CO2) Monitor is designed for air quality control and health control by measuring Carbon Dioxide level in areas where CO2 could be a concern. The measured CO2 value in ppm (parts‐per‐million), Temperature, Humidity and Time will be displayed on the LCD along with three CO2 status indications: Good (0 to 800ppm), Normal (800 to1200ppm), Poor (>1200ppm). An acoustic alarm sounds when the CO2 level exceeds a defined level. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.
Operation
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Power button (rear) Turns the unit on or off.
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HOLD button (rear) Freezes the current reading in the display.
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°C/°F button (rear) Selects °C or °F
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Clock button (rear) Press and hold this button for 2 seconds to enter into clock mode. Press the “▲” or “▼” button to adjust the flashing digits. Press the clock button again to step through the settings (day:month:year;hour:minute). Press the “ESC” button to exit the clock setting mode.
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Alarm button Press the Alarm button once to activate the Alarm mode. The icon appears on LCD display. If the measured value exceeds the defined value, the alarm will sound and the display will flash. Press the button again to exit the Alarm mode. Alarm Value Setting Press and hold the ALARM button for 2 seconds to enter into setting mode. The icon will flash.
Press the ▲or ▼ button to increase or decrease the value.
Press the ESC button to exit the setting mode.“GOOD‐NORMAL” and “NORMAL‐POOR” Value Setting In the Alarm Value Setting mode, press the ALARM button to set the GOOD NORMAL threshold value. “GOOD NORMAL” will appear in the display. Adjust the value as needed. Press the ALARM button again to set the NORMAL POOR threshold value. “NORMAL POOR” will appear in the display. Adjust the value as needed. Press the ESC button to exit the mode. -
▲button
Press this button to increase a value. Press the “ESC” button to exit the function. -
▼button
Press this button to decrease a value. Press the ESC button to exit the function. -
MAX MIN button
Press the button once, the ”MAX” icon appears and the Maximum measured value of CO2, temperature and humidity will be displayed on the screen. The display will be updated only if a higher value is measured. Press this button again, the ”MIN” icon appears and the Minimum measured value of CO2 temperature and humidity will be displayed on the screen. Press ESC button to exit the function. -
ESC button
Press this button to exit the current mode. -
AC adaptor socket
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Power ON LED
Backlight
Touch the button area below the LCD and the backlight will turn on. It will
turn off automatically after 20 seconds of inactivity. Press “ESC” button at
any time to exit the function.
ABC (Automatic Baseline Calibration)
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 turned on. ABC is designed to calibrate the meter at the minimum CO2 reading detected during 7 days of continuous monitoring (power on). It assumes that the area being tested receives fresh air with a CO2 level of approximately 400ppm at some period of time during the seven days. It is not suitable to use a desktop CO2 meter in closed areas with consistently high CO2 levels, 24 hours a day.
Maintenance
- The meter should be cleaned with a damp cloth and mild detergent when necessary. Do not use solvents or abrasives.
- Store the meter in an area with moderate temperature and humidity.
Specifications
Display LCD with backlighting
Sampling Interval: 2 seconds
Overload Indication : “‐OL‐”
Sensor Type CO2: NDIR (non‐dispersive infrared) technology
Operating Conditions ‐5°C to 50 °C (23 oF to 122 oF) at < 90 % RH
Storage Conditions ‐5°C to 50 °C (23 oF to 122 oF) at < 90 % RH
Power Supply 110V～220V AC, output 6.0V DC ≥ 500mA (supplied)
Dimensions / Weight 117x102x102mm (4.6x4x4”); 204g (7.2 oz.)
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All rights reserved including the right of reproduction in whole or in part in
any form.
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