Extech Instruments NON-DISPLAY PORTABLE User's Guide Page 1

User's Guide CO2 Meter Model CO250

CO250-EU-EN v1.5 12/13 2 1234756Introduction Congratulations on your purchase of this Model CO250 Meter. This meter measures CO2 (Carbon Dioxide) le

CO250-EU-EN v1.5 12/13 3 Operation BATTERY INSTALLATION The meter is powered by 4 AA batteries or a DC adaptor. Install the batteries into the rear

CO250-EU-EN v1.5 12/13 4 MIN,MAX,STEL,TWA In the normal mode, press the Max/AV button to see the minimum, maximum, and weighted average readings. Wi

CO250-EU-EN v1.5 12/13 5 SETUP (alarm limit and temperature scale) In the normal mode press and hold the SET button for more than 1 sec to enter the

CO250-EU-EN v1.5 12/13 6 Calibration CO2 CALIBRATION The meter is calibrated to a standard 400ppm CO2 concentration at the factory NOTE: When the a

CO250-EU-EN v1.5 12/13 7 Specifications Function Range Resolution Accuracy CO2 0 to 5000ppm 1ppm ±(%5rdg + 50ppm) 5000 to 9999ppm 1ppm Not spe

CO250-EU-EN v1.5 12/13 8 Maintenance CLEANING AND STORAGE 1. The meter should be cleaned with a damp cloth and mild detergent when necessary. Do no