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      HCD2RMC Series of Room Carbon Dioxide Transmitter

      The room CO2 transmitter device uses a highly accurate and reliable nondispersive infrared (NDIR) sensor in an attractive, low-profile enclosure for room applications to monitor CO2 levels. The sensor uses dual-wavelength optics and LTA (long-term adjustment) signal processing technology to deliver industry-leading long-term accuracy and reliability. These technology features to ensure optimum measurement stability for both periodic and constant occupancy applications, so the device is equally suitable for a classroom or a hospital room.

      Standard features include a field selectable output signal of either 4-20 mA, 0-5 Vdc or 0-10 Vdc for the highest versatility, a programmable CO2 measurement span, a backlit alpha­numeric LCD and easy menu operation for configuration. Optional features include a resistive temperature sensor output (with LCD display of temperature in either •c or °F), 2-button setpoint adjustment, a control relay with programmable setpoint, hysteresis and time delay, and a dry-contact override switch.

      Category: Product ID: 2631

      Description

      Gas Type Detected: Carbon dioxide (CO2)

      Sensor Type: Dual wavelength non-dispersive infrared (NDIR)

      Sensor Accuracy: ± 50 ppm+ 3% of reading

      Measurement Range: 0-2000 ppm (default), adjustable 1000-5000 ppm

      Pressure Dependency: ……… < 1 % of reading I kPa

      Response Time:  90 seconds (T90)

      Warm-Up Time: 1 minute

      Sensor Coverage Area: 100 rn2(1000 ft2) typical

      Sensor Life Span: >10 years

      Transmitter Accuracy: ±0.25% of span (including linearity, hysteresis and repeatability)

      Power Supply: 24 Vdc ±20% or 24 Vac ±10% (non-isolated half-wave rectified)

      Protection Circuitry: Reverse voltage and transient protected

      Input Voltage Effect: Negligible over the specified operating range

      Output Signal Type: 4-20 mA{3-wire), 0-5 or 0-10 Vdc {field selectable)

      Current Consumption: Current: 75 mA@ 24 Vdc max, 150 mA @ 24 Vac max

      Voltage: 50 mA@ 24 Vdc max, 100 mA@ 24 Vac max

      Output Drive @ 24 Vdc: Current: 5500 max

      Voltage: 10,0000 min

      Ambient Operating Range: -10 to 50°C {14 to 122°F), 5 to 90 %RH non-condensing

      Storage Conditions: -30 to 70″C (-22 to 158°F), 5 to 90 %RH non-condensing

      LCD Display Units: ppm {CO2), •crF {optional temperature/setpoint)

      Display Range: 0-5000 ppm, o to 50°C Io to 122°F

      Display Size: 35mm W x 15mm H (1.4″ x 0.6″)

      Digit Height: 2-line x 8 character

       

      Optional Temperature Sensor

      Type: Various Thermistors and RTDs

      Accuracy: Thermistors: ±0.2°C (±0.36°F) @ 25°C (77°F) Platinum RTD’s: ±0.3°C (±0.54°F)@ o•c (32’F) Nickel RTD’s: ±0.4°C (±0.72°F)@ o·c (32°F)

      Output: 2-wire resistive

      Relay: Form A (N.O.), 2 Amps @ 140 Vac / 30 Vdc (Optional 2-wire output)

      Override Switch: 50 mA@ 12 Vdc max (Optional 2-wire output)

       

      Optional Setpoint Control

      Type: Front panel up/down pushbuttons

      Range: ±10 resistive steps, range 16 to 26°C in, 0.5°C increments or 60 to 80°F in 1 °F increments

      Midpoint: Default 21 °C/70°F, programmable 18 to 25°C (64 to 77″F)

      Resolution: Programmable 0.5 / 1″C/°F

      Action: Programmable direct or reverse acting

      Enclosure: White ABS, IP30 (NEMA 1) 84mm Wx 119mm H x 29mm D (3.3″ x 4.7″ x 1.15″)

      Wiring: Screw terminal block (14- 22 AWG)

      Approvals CE

      Country of Origin Canada