Description
The CDD5 Series CO2/Humidity/Temperature transmitter incorporates three sensors in one attractive wall mount enclosure for the most efficient environmental monitoring and control system. It uses highly accurate and reliable Non-dispersive Infrared (NDIR), Thermoset Polymer based capacitance humidity sensor and curve matched thermistor combined with state-of-the-art digital linearization and temperature compensated circuitry in an attractive, low profile enclosure to monitor room CO2, humidity & temperature levels and provides a linear analog signal output of 4-20 mA, 0-5 or 0-10 Vdc signals. The CDD5 is available with CO2 ranges of 0-2000 ppm or 0-20,000 ppm (Dual-channel). An optional LCD display is available that is fully programmable to show only the parameters required.
Features
- Outputs CO2, Temperature & RH Levels
- 3 analog outputs
- 0-2000 or 20,000 (Dual-channel) PPM CO2 ranges
- Patented self-calibration algorithm
- Guaranteed 5 year calibration interval
- Easily field calibrated
Specifications
-
CO2 Signal:
Measurement Type:
CDD5A & B - Non-Dispersive Infrared (NDIR)
CDD5C & D - Dual Channel Non-Dispersive Infrared(NDIR), diffusion sampling
Range:
CDD5A & B - 0-2000ppm
CDD5C & D - 0-20,000ppm standard, programmable span from 2000 to 20,000ppm Standard
Accuracy:
CDD5A & B - ± 30ppm +3% of reading with Auto Cal on
CDD5C & D - ±75ppm or 10% of reading (whichever is greater)
Temperature Dependence: 0.2% FS per °C
Stability:
CDD5A & B - <2% FS over life of sensor (15 years typical)
CDD5C & D - <5% FS over life of sensor (15 years typical)
Pressure Dependence: < 0.13% of reading per mm Hg
Altitude Correction: Programmable from 0-5000 ft via keypad
Response Time: <2 minutes for 90% step change typical Warm-up Time: <2 minutes -
TEMPERATURE SIGNAL
Sensing Element: Precision thermistor
Range: 0 to 35°C (32 to 95°F) or 0 to 50°C (32 to 122°F) selectable via keypad -
RH SIGNAL
Sensing Element: Thermoset polymer based capacitive
Accuracy: ±2 %RH
Range: 0 to 100 %RH, non-condensing
Hysteresis: ±3 %RH
Response Time: 15 seconds typical
Stability: ±1.2 %RH typical @ 50 %RH in 5 years -
OPTIONAL RELAY OUTPUT
Contact Ratings: Form A contact (N.O.), 2 Amps @ 140 Vac/30 Vdc
Relay Trip Point:
CDD5A & B - Programmable 500 - 2000ppm via keypad
CDD5C & D - Programmable 500-15,000ppm via keypad
Relay Hysteresis:
CDD5A & B - Programmable 25-200ppm via keypad
CDD5C & D - Programmable 25-500ppm via keypad -
OPTIONAL LCD DISPLAY
Resolution: 1ppm CO2 1 %RH, 1°C (1°F)
Size: 35mm W x 15mm H (1.4” x 0.6”) alpha-numeric 2 line x 8 character
Backlight: Enable or disable via keypad - OPTIONAL OVERRIDE SWITCH: Front panel push-button available as two-wire dry-contact output
- OPTIONAL SETPOINT CONTROL: Front panel push-buttons available as two-wire resistive output, 0-10 KΩ standard
- POWER SUPPLY 20-28 Vdc/ac (non-isolated half-wave rectified)
-
OUTPUT SIGNALS
Current: 4-20 mA (Model CDD5A & C)
Voltage: 0-5 Vdc or 0-10 Vdc (Model CDD5B & D) -
CONSUMPTIONS
Current: 145 mA max @ 24 Vdc, 260 mA max @ 24 Vac (with all options)
Voltage: 85 mA max @ 24 Vdc, 150 mA max @ 24 Vac (with all options) -
OUTPUT DRIVE CAPABILITY
Current: 550Ω max
Voltage: 10 KΩ min - OUTPUT RESOLUTION 10 bit PWM
- PROTECTION CIRCUITRY Reverse voltage and output limited
- OPERATING CONDITIONS 0 to 50°C (32 to 122°F), 5 to 95 %RH non-condensing
- SENSOR COVERAGE AREA 100m2 (1000ft2 ) typical
- WIRING CONNECTIONS Screw terminal block (14 to 22 AWG)
- ENCLOSURE White ABS, 84mm W x 119mm H x 29mm D (3.3” x 4.7” x 1.15”), IP30 (NEMA 1)
- COUNTRY OF ORIGIN Canada