USER GUIDE CO2 Monitor and Datalogger Model CO220
Introduction Congratulations on your purchase of the Model CO220 Carbon Dioxide Meter. This meter measures CO2 concentration, air temperature, and relative humidity. The CO200 includes a 99 Memory Datalogger for storing and retrieving readings with date and time stamping. The audible alarms make this is an ideal instrument for indoor air quality (IAQ) diagnostics. Carbon dioxide (CO2) is a gaseous component of the earth’s atmosphere. The concentration of CO2 in natural ambient air is approximately 0.
DISPLAY SYMBOL DESCRIPTIONS ppm CO2 concentration unit of measure 350ppm to 450ppm 450ppm to 700ppm 700ppm to 1000ppm 1000ppm to 2500 ppm 2500ppm to 5000ppm 5000ppm and above Air Temp Air Temperature TWA Time Weighted Average (8 hrs) STEL Short‐Term Exposure Limit (15 minute weighted average) IPS% Liters per second per person cfm/p Cubic feet per minute per person WB Wet Bulb temperature DP Dew Point temperature MAX/MIN Maximum or Minimum reading PUSH‐BUTTON DESCRIPTION SET Enter setup mo
Operation POWERING THE INSTRUMENT Power the unit by plugging the AC adaptor into the meter and into an AC source. The meter will switch ON with a short beep. Please use an appropriate power source: 100 to 240VAC (50‐60Hz). The AC adaptor’s output voltage is 7.5 to 9.0V and its output current is 0.5A. Use of 3rd party AC adaptor can damage the meter. The LCD will display the current CO2 concentration, air temperature, relative humidity, date, and time (date and time toggle every 10 seconds).
CO2 DISPLAY PAGES Press the CO2 button to change the CO2 display page on the top‐tier LCD area. The pages are shown below for CO2, Max‐Min, TWA, STEL, IPS% and cfm/p. TIME WEIGHTED AVERAGE (TWA) TWA is Time Weighted Average (8 hours); the meter updates the reading every 60 seconds. If the meter has been powered on for less than 8 hours, the TWA value will be the weighted average of readings taken since the unit was powered ON.
VENT.R (CO2‐based demand‐controlled ventilation) CO2 ‐based demand‐controlled ventilation refers to the practice of using carbon dioxide concentrations as an indicator for a per‐person ventilation rate. In this context, CO2 is monitored as a byproduct of respiration rather than as an indoor contaminant. The rate at which people produce CO2 varies with diet and health, as well as with the duration and intensity of physical activity. The more exertion an activity entails, the more carbon dioxide is produced.
Setup Mode Press and hold the SET button for 2 seconds from the normal mode of operation to access the SETUP mode. Setting Year When the two‐digit year number appears, use the SELECT button to increase the year value. Press SET to move to the next setting Setting Month When the two‐digit month appears on the LCD press SELECT to increase the month. Press SET to save and move to the next setting. Setting Date When the two‐digit date appears on LCD press SELECT to increase the date.
Automatic Baseline (ABC) 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 ON. ABC is designed to calibrate the meter at the minimum CO2 reading detected during 7.5 days continuous monitoring (with 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.
Specifications Function Range Resolution Accuracy CO2 0 to 9999ppm 1ppm ± (5%rdg +50ppm) from 0 to 2000ppm Temperature ‐10 to 60°C 14 to 140°F 0.1° ±0.6°C / 1.0°F Relative Humidity 0.1 to 99.9% 0.
CO2 Levels and Guidelines IMPORTANT LIABILITY NOTE The CO2 guideline data provided here is meant for informational purposes only and is not intended as a direct recommendation from Extech Instruments or FLIR Systems. The user must take full responsibility when determining how this information is to be used. Non‐Enforced Reference levels 250 ‐ 350 ppm – background (normal) outdoor air level 350‐ 1,000 ppm ‐ typical level found in occupied spaces with good air exchange.
