Dwyer Instruments CDTV Specifications
®
SERIES CDTV | CARBON DIOXIDE/VOLATILE ORGANIC
COMPOUND TRANSMITTER
FEATURES/BENEFITS
• Combination VOC and CO2 outputs reduce labor and material costs
• Single beam dual wavelength NDIR CO
that may be occupied 24 hours a day
• VOC output is correlated to be equivalent to CO
• Ventilate using ASHRE’s occupancy-based VRP Algorithm
APPLICATIONS
• HVAC applications in hospitals, schools, and commercial buildings
• Demand control ventilation
• Odor control
• Waiting rooms or other spaces that may be occupied 24 hours a day
DESCRIPTION
The Series CDTV Carbon Dioxide / Volatile Organic Compound (VOC) Transmitter
reduces energy cost in buildings by lowering the amount of conditioned air based on the
occupancy of the space. By detecting both CO2 and VOC, the transmitter can also detect
fumes that may need to be exhausted during lower occupancy periods. Combining both
measurements in one transmitter reduces both labor and material costs by only having to
install one CDTV-VOC unit, instead of separate CO2 and VOC transmitters.
2 sensor allows for use in spaces
2 measurements
SPECIFICATIONS
Range CO2: 0 to 2000 or 0 to 5000 ppm (depending on model); VOC: 0 to 2000 ppm CO2 equivalent.
Accuracy CO
Temperature Dependence ±8 ppm / °C at 1100 ppm.
Non-Linearity CO
Pressure Dependence CO
Response Time CO
Temperature Limits 32 to 122°F (0 to 50°C).
Power Requirements 16 to 35 VDC / 19 to 28 VAC.
Power Consumption Average: 2 watts; Peak: 3.75 watts.
Sensor CO
Output Current: 0 to 20 mA, 4 to 20 mA, 0 to 10 mA, or 2 to 10 mA (depending on selection jumper, max 500 Ω); Voltage: 0 to
Weight 5.6 oz (158.8 g).
Enclosure Rating Duct mount: NEMA 4X (IP66) for housing only; Wall mount: IP20.
Agency Approvals CE.
2: ±40 ppm +3% of reading.
2: 16 ppm.
2: 0.13% of reading per mm of Hg.
2: 2 minutes for 99% step change; VOC: 5 minutes.
2: Single-beam, dual-wavelength NDIR; VOC: MEMS metal oxide semiconductor.
10 VDC, 2 to 10 VDC, 0 to 5 VDC, or 1 to 5 VDC (depending on selection jumper, min 500 Ω); Relay: SPST NO 2A @
30 VDC.
dwyer-inst.com
DWYER INSTRUMENTS, INC.
T: 219-879-8000 | F: 219-872-9057 | info@dwyermail.com
800-872-9141
®
DIMENSIONS WIRING DIAGRAM
[3.17]
11-49/64˝
1.10
[76.20]
[1
[71.12]
TURE
POWER
Ø1-15/64˝
[31.35]
3.000
[298.85]
1/8˝
Ø3-5/16˝
[84.14]
4-25/32˝
[121.44]
4-9/32˝
[108.74]
4.50
14.30]
2.80
2-13/16˝
[71.44]
Duct Mount
[27.96]
2x .176
[4.47]
.573
[14.56]
.552
[14.02]
North American style wall mount
HOW TO ORDER
Use the bold characters from the chart below to construct a product code.
SUPPLY
VOC
RECEIVER
CO2
RECEIVER
RELAY
CONTACT
Active output wiring diagram
PASSIVE
TEMPERA
SENSOR
CDTV -RLY0 4-2 D 4
SERIES
CDTV: CO2/VOC transmitter
OPTIONS
-RLY: Relay
-FC: Factory calibration certicate
-LCD: LCD display (wall only)
GAS CONCENTRATION RANGE
-2: 0 to 2,000 ppm CO
2 range
-5: 0 to 5,000 ppm CO2 range
-COC: Certicate of calibration
VOC OUTPUT
4: 4 to 20 mA / 0 to (5 or 10) VDC
HOUSING CONFIGURATION
D: Duct
N: North American style (wall)
TEMPERATURE OUTPUT
0: None
A: 10 KΩ NTC thermistor type III
2 OUTPUT
CO
4: 4 to 20 mA / 0 to (5 or 10) VDC
B: 10 KΩ NTC thermistor type II
C: 3 KΩ NTC thermistor
D: Pt100 Ω RTD
E: Pt1000 Ω RTD
F: 20 KΩ NTC thermistor
Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the
latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.
DWYER INSTRUMENTS, INC.
T: 219-879-8000 | F: 219-872-9057 | info@dwyermail.com
dwyer-inst.com
800-872-9141
DS-CDWP Rev. 2 | 3/19
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