GENEQ > Environment > CO2 > Gaz Detectors

CO2 Ventostat Wall Mount Monitor
 


FEATURES
  • Method: Dual Beam Absorption Infrared™ Patented TEMA self calibration software. Optional thermistor temperature measurement
  • Sample Method: Diffusion or flow-through (50-100 ml/min)

SPECIFICATIONS
  • Typical conditions 60-90°F(15-32°C): 0-2000 ppm: ±50 ppm or ±3% of reading, whichever is greater 2,000-10,000 ppm: ±5% of reading
  • Extended conditions 32-122°F (0-50°C): 0-2000 ppm: ±100 ppm or ±5% of reading, whichever is greater 2,000-10,000 ppm: ±7% of reading
  • Elevation (Pressure) Correction: Add 0.13% of reading per mm Hg decrease from 760 (On-board correction, user set)
  • Annual Drift: ±10 ppm (negligible) with TEMA on ±20 ppm typical with TEMA off
  • Response Time 0..90% FS: <2 min.
  • Warm-Up Time @ 25 °C: <2 minutes
  • Operating Conditions: 0°...50°C (32°-122°F); 0°...95% RH, non-condensing
  • Storage Conditions: -40°...70°C
  • Agency Certification: FCC Part 15 Class B
  • Calibration Interval: Five years/zero ppm gas offset adjust

GENERAL PERFORMANCE
  • Measurement Range Analog output: 0-2000 ppm factory default Adjustable to 10,000 ppm
  • Digital display: 0-1-,000 ppm
  • Sensitivity: ±10 ppm
  • Resolution: ±1 ppm

TEMPERATURE SENSOR
  • Thermistor Standard: No Sensor
  • Optional: User-specified, direct pass-through connection (Consult factory)

INPUT/OUTPUT
  • Power: 18-36 VAC RMS, 50/60 Hz 18-42 VDC polarity protected/dependent
    70 mA average, 100 mA peak, at 24 VDC
  • Analog CO2 Output: 0-10 VDC (100 Ohms output impedence)
    4-20 mA (RLmax = 500 Ohms) Both outputs available simultaneously
  • Relay: Normally Open or Normally Closed (wire either way), gold bifurcated, 2A rating. Adjustable setpoint, factory set at 1000 ppm, 50 ppm hysteresis.
  • Wiring: 18-28 AWG stranded copper wire only. 2 wires each for power, analog output, relay, and optional thermistor.
  • Ditital I/O: RS-232 interface, use with optional PC software and cable in UIP kit 2072

CO2 SENSOR SPECIFICATION
The CO2 sensor for demand control ventilation shall be the 8002W non-dispersive infrared sensor made by Engelhard Sensor Technologies (805-964-1699). The diffusion gas chamber in the sensor should incorporate a reflective light pipe or waveguide surrounded by a gas permeable 10 micron filter of 0.050" thickness that prevents particulate contamination of the sensor. For long term signal stability, the sensor shall utilize a dual channel infrared detector, one channel for CO2 absorption, the other for reference. The sensor shall incorporate elevation correction adjustment and Time Extended Measurement Algorithm (TEMA) software for self correction of drift to better than ±10 ppm per year. The sensor shall have accuracy of ±50 ppm and repeatability of ±20 ppm. The sensor shall have a five year recommended calibration interval. All adjustments to the sensor including output scaling, elevation adjustment, relay setpoint, relay dead-band, linear or exponential output, and single point calibration shall be made via on-board push buttons and LCD display. The sensor shall also have the capability for adjustment via computer connected to an on-board RJ45 jack. For ease of installation, the sensor shall have a detachable base with all field wiring terminals on the base.

CAT. NO. DESCRIPTION
TEL-8001W CO2 Wall Mount - no display, 0 - 10 VDC or 4-20 mA
TEL-8002W CO2 Wall Mount - with display, 0 - 10 VDC or 4-20 mA
TEL-8002P Pilot tube-Duct Mount
TEL-1508 Enclosure for Duct Mount