Ventilation is an important part of
maintaining a comfortable, healthy, productive environment for
people. Improper ventilation can have a negative impact on occupant
health and performance, increase the risk from litigation, and/or
waste energy. Demand-controlled ventilation using CO2 sensors
prevents energy losses from over-ventilation while maintaining
indoor air quality. The most energy savings potential is in
buildings where occupancy fluctuates during a 24-hour period.
Numerous organizations now require and/or recommend CO2-based
ventilation control in different commercial HVAC applications. Some
utility companies also offer rebates to building owners for
installing CO2 sensors.
Wall mount sensors are used to control a specific area such as a
conference room, classroom, meeting hall, etc. The Telaire T8200
Ventostat series are easy to install and have a clean, modern look
that suits most indoor environments.
GE Telaire Ventostat T8200 CO2 duct mount transmitter uses a dual-channel
optical system and three-point calibration process for enhanced stability,
accuracy and reliability. Used in applications where there is full-time
occupation 24 hours a day.
Dual Channel Sensor
The GE Telaire T8200 dual channel sensor can be described as a CO2 channel that
measures gas concentration and a reference channel that measures the sensor signal
intensity. The dual channel sensor performs periodic self-calibrations using the
reference channel. The self-calibrations are approximately every 24 hours. During
the self-calibration the sensor ppm reading is frozen, it will not react to changing
CO2. The calibration time is adjustable but nominally two minutes.
GE recommends periodic gas calibration depending on the application accuracy
requirements. While the reference channel corrects for changes over time, a field
calibration using nitrogen gas or alternatively ambient calibration will immediately
restore the highest level of accuracy. Refer to the calibration manual for details.
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