- Nous contacter
|Modèle :||Ventostat 8000|
Telaire Wall Mount CO2, Humidity and Temperature Transmitters
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 luctuates during a 24-hour period. Numerous organizations now require and/or recommend CO2- based ventilation control in diferent commercial HVAC applications. Some utility companies also ofer rebates to building owners for installing CO2 sensors.
• Non-dispersive infrared (NDIR) absorption
• Gold-plated optics
• Patented ABC Logic self calibration algorithm
CO2 Measurement Range
T8100/T8300 - Single Channel 0 to 2000 ppm (0 ppm = 0 V, 4 mA)
T8200 - Dual Channel 0 to 2000 ppm (0 ppm = 0 V, 4 mA)
T8100/T8300 - Single Channel
• 400-1250 ppm ± 30 ppm +3% of reading, whichever is greater*,**
• 1250-2000 ppm ±5% of reading + 30ppm *, **
T8200 - Dual Channel
• 75 ppm or 10% of reading (whichever is greater)
** ABC Logic not d oena cstpivaant egdas of ±2%
Power Supply Requirements
18-30 VAC RMS, 50/60 Hz, or 18 to 42 VDC,polarity protected
Typical 0.7 W at nominal voltage of 24V AC RMS
0.2% FS per °C (±0.11% per °F)
T8100/T8300 - Single Channel <2% of FS over life of sensor (15 years)
T8200 - Dual Channel
<5% of FS or <10% reading annual over life of sensor (10 years)
0.135% of reading per mm Hg
24 months on mechanical defects Calibration - lifetime warranty for T8100 and T8300 series
CE and RoHS compliant
Every 5 seconds
CO2 Warm-up Time
• < 2 minutes (operational)
• 10 minutes (maximum accuracy)
• 32°F to 122°F (0°C to 50°C)
• 0 to 95% RH, non-condensing
-40°F to 158°F (-40°C to 70°C)
NTC 10 K W thermistor
±1°C (15° to 35°C)
RH Sensing Element
Capacitive polymer sensor
0% to 99% RH (non-condensing)
RH Accuracy (25°C)
±2.5% RH (20 to 80% RH)
±3.5% RH (<20% and >80% RH)
Active Temperature Accuracy
±0.8°C @ 22°C
Active Temperature Range
32°F to 122°F (0 to 50°C)
• 0 to 10 V (100 W output impedance) and
• 4 to 20mA (RL maximum 500 W) available simultaneously
• Digital to Analog Error ±1% CE and RoHS compliant
|Sensor Accuracy & Field Calibration|
|CO2 ABC Logic Self Calibration
T8100 and T8300 single channel sensors employ the patented ABC (Automatic Background Calibration) Logic self-calibration system. ABC Logic virtually eliminates the need for manual calibration in applications where the indoor CO2 level drops to outside levels during unoccupied periods (e.g. during evening hours). ABC Logic is a special software routine in the sensor that remembers the background readings for 14 consecutive evenings, calculates if there is a sensor drift, and then corrects for it.
With ABC Logic enabled, the sensor will typically reach its operational accuracy after 25 hours of continuous operation at a condition that is exposed to ambient reference levels. Sensors will maintain accuracy speciications with ABC Logic enabled, given that it is at least three times in 14 days exposed to the reference value and this reference value is the lowest concentration to which the sensor is exposed.
Note: Applies when used in typical indoor ambient air. Consult GE if other gases or corrosive agents are part of the application environment.
CO2 Calibration Guarantee
GE is serious about minimizing maintenance, so each single-channel sensor (T8100/T8300) comes with a lifetime calibration guarantee. And each dual channel sensor has a two-year calibration guarantee (T8200).
For T8100 and T8300 series, no calibration is required due to ABC Logic. For T8200 series, annual calibration is recommend for the best accuracy. However, most applications using T8200 series could extend the calibration interval. For the humidity sensor, no calibration is required. Replacement humidity sensors are available. If a Telaire 8000 series single channel sensor drifts out of calibration range, it can be sent back to Telaire for a free factory calibration. Further information on the guarantee is available on our website.
T8200 – Dual Channel
The 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 selfcalibrations 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 ield calibration using nitrogen gas or alternatively ambient calibration will immediately restore the highest level of accuracy. Refer to the calibration manual for details. Ventostat wall mount dimensions
Display versions scroll between ppm CO2, %RH Humidity and °F Temperature when the option is selected.
No display, basic functionality for CO2 and passive thermistor only.
Digital display, functions of CO2 and thermistor are standard. Humidity and active temperature options are available. Display scrolls all measurements that are included.