Dwyer Instruments CDTV Series Specifications-Installation And Operating Instructions

Series CDTV Duct Mount Carbon Dioxide / Volatile
Organic Compound Transmitter
Specifications - Installation and Operating Instructions
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 CO
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 CO
transmitters.
Carbon dioxide measurements are taken using our proven Single-Beam Dual-
Wavelength Non-Dispersive Infrared (NDIR) sensor. Our sensor allows users to get
accurate measurements without waiting for the settling / correction periods of other
logic based sensors. Transmitters can be used in buildings and applications that have
24 hour occupancy and can be calibrated on site to match environmental conditions
for improved accuracy.
The VOC measurement is a single value derived from the presence of substances
including alcohols, aldehydes, aliphatic hydrocarbons, amines, aromatic hydrocarbons,
CO, CH4, LPG, ketones, and organic acids. Although a standard unit of measure is
not currently defined, the VOC measurement unit "ppm CO
device is commonly used in the industry. The VOC measurement does not actually
measure CO , but instead senses and indicates an air quality value that approximately
2
correlates perceived comfort levels to similar concentrations of CO
Single-beam dual-wavelength sensor advantages:
• Automatically corrects for aging effects in occupied and unoccupied buildings
• Perfect for hospitals and manufacturing plants that are occupied 24 hours per
day
• Measures actual unfiltered light intensity directly
• Eliminates error from incorrect assumptions of gas concentration in theoretical
logic assumption methods
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
1/8˝
[3.17]
4-9/32˝
[108.74]
Ø3-5/16˝
[84.14]
SPECIFICATIONS
Range: CO
and VOC, the transmitter can
ppm CO
2
Accuracy: CO
Temperature Dependence: ±8 ppm / °C at 1100 ppm.
and VOC
Non-Linearity: CO
2
Pressure Dependence: CO2: 0.13% of reading per mm of Hg.
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
semiconductor).
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 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.
Weight: 5.6 oz (158.8 g).
equivalent" used by the
Agency Approvals: CE.
2
INSTALLATION
in the environment.
2
Make sure all connections are in accordance with the job wiring diagram and in
accordance with national and local electrical codes. Use copper conductors only.
transmitter to adjust to the current CO
days.
4-25/32˝
[121.44]
2-13/16˝
[71.44]
: 0 to 2000 or 0 to 5000 ppm (depending on model); VOC: 0 to 2000
2
equivalent.
2
: ±40 ppm +3% of reading.
2
: 16 ppm.
2
: 2 minutes for 99% step change; VOC: 5 minutes.
2
: Single-beam, dual-wavelength NDIR; VOC: MEMS (metal oxide
2
Disconnect power supply before installation to prevent electrical
WARNING
shock and equipment damage.
Use electrostatic discharge precautions (e.g., use of wrist straps)
CAUTION
during installation and wiring to prevent equipment damage.
CAUTION Avoid locations where severe shock or vibration, excessive
moisture or corrosive fumes are present.
Do not exceed ratings of this device. Permanent damage not
CAUTION
covered by warranty may result.
Upon powering the transmitter, the firmware version will flash on
NOTICE
the display. A warm up period of 30 minutes is required for the
concentration.
2
NOTICE Self calibration feature of the transmitter requires exposure to
normal outdoor equivalent carbon dioxide level once every thirty
LEED is a registered trademark of the U.S. Green Building Council.
®
Phone: 219/879-8000
Fax: 219/872-9057
Bulletin AQ-CDTV-D
11-49/64˝
[298.85]
Ø1-15/64˝
[31.35]
www.dwyer-inst.com
e-mail: info@dwyermail.com