This document is the user's guide for Extech CO250 CO2 meter
The Extech CO250 is a multi-function meter designed for indoor air quality (IAQ) diagnosis. It measures carbon dioxide (CO2) levels, air temperature, dew point, wet bulb temperature, and humidity. The device features an LCD display with backlight, a keypad for navigation, and an RS232 port for PC connectivity. It is powered by four AA batteries or an AC adapter and includes an audible alarm for high CO2 concentrations.
| CO2 Range | 0 to 5000ppm |
|---|---|
| CO2 Accuracy | ±50ppm±5%rdg |
| Temperature Range | -10 to 60°C |
| Humidity Range | 0.0 to 99.9% |
| Power Supply | 4 x 1.5V 'AA' batteries or AC adaptor |
| Battery Life | approx. 24 hours |
| Dimensions | 200x70x57mm |
The meter is calibrated to a standard 400ppm CO2 concentration at the factory.
The meter performs a 30 second countdown for meter warm up at power up.
The alarm range is adjustable from 100 to 9900ppm.
Extech recommends that annual calibrations be performed to verify meter performance and accuracy.