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0 reviews | UPC: 793950502303 | Model: Extech CO230
Wall Mounted Indoor Air Quality, Carbon Dioxide Meter
List Price: $336.59
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The Extech CO230 measures carbon dioxide (CO2) levels, air temperature and humidity. It will also calculate dew point and wet bulb temperatures. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.
The CO230 is powered by a 12VDC adaptor. 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. The LCD will perform a 30 second countdown and then displays the current CO2 concentration, air temperature, and relative humidity.
The meter starts to measure when powered on and readings update every second. If the operating environment changes (from high to low temperature, for example) the meter requires 30 seconds for the CO2 sensor and 30 minutes for the RH sensor to stabilize. It is important to not obstruct the sensors or hold the meter close to the mouth or any source of CO2 when measuring.
In MIN and MAX modes, the meter shows the minimum and maximum readings of CO2 (main display), air, dew point or wet bulb temperatures (lower left display) and humidity (lower right display). In STEL (short term exposure limit) and TWA (time weighted average) modes, the main display shows the weighted average of CO2 readings for the prior 15 minutes (STEL) or 8 hours (TWA). The lower display shows the current air, dew point/wet bulb temperature and humidity.
Audio-visual alarms give warnings when CO2 concentration exceeds the high limit. The meter beeps (~80dB) and flashes the LED when the CO2 level exceeds the high limit. The beeper stops when any key is pressed or if the reading falls below the low setpoint limit. The LED lamp will continue to flash when the beeper is manually shut off if there is still an alarm condition. The LED will stop flashing when readings return to normal.
The meter includes an internal reed relay that can be connected to an external device (not supplied). When the CO2 readings exceed the high limit, the relay closes. When the CO2 readings fall below the low limit, the relay will open. This relay can be used to switch in an external device. The meter can be connected to a device to control such things as alert signs/beepers or ventilation systems for conditioning the air quality.
Note: Wall mount hole and relay wiring screws are located on the back
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