Series CDWP Carbon Dioxide Transmitter
Specifications - Installation and Operating Instructions
Bulletin AQ-CDWP-2
The
Series CDWP
Carbon Dioxide Transmitter
accurately monitors the CO
2
concentration in industrial and indoor environments to help achieve energy savings.
For increased sensor life and accuracy, a single-beam dual-wavelength non-dispersive
infrared (NDIR) sensor is used to eliminate light source aging effects. The single-
beam dual-wavelength sensor technology provides the highest level of accuracy
compared to Automatic Baseline Correction methods, which can unintentionally shift
the calibration based on CO
2
levels and barometric pressure conditions.
Universal outputs allow users to select the transmitter output to be 4-20 mA, 0-5
VDC, or 0-10 VDC to work with virtually any building management controller or
programmable logic controller.
The CDWP utilizes a rugged IP54 aluminum housing with an exterior gray finish coat
that was tested to withstand a 168 hour salt spray corrosion test. This ruggedized
housing helps to protect the sensor from splashing liquid and airborne dust or debris
making the Series CDWP a great fit for animal husbandry applications and confined
feeding operations.
Single-beam dual-wavelength sensor advantages:
• Automatically corrects for aging effects in occupied and unoccupied spaces
• Measures actual unfiltered light intensity directly
• Eliminates error from incorrect assumptions of gas concentration in theoretical
logic assumption methods
INSTALLATION
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.
SUSPENSION MOUNTING
To suspend the CDWP from the ceiling, loop the end of the power cord and feed it
through the hole at the base of the bracket and hook the loop on the prong.
M12 Connector Option
The M12 Connection option allows for easy removal of the CDWP before site cleaning
operations.
SPECIFICATIONS
Sensor:
Single beam, dual-wavelength NDIR.
Range:
CO
2
: 0 to 2000, 0 to 5000, or 0 to 10000 PPM (depending on model).
Accuracy:
CO
2
: ±40 PPM ±3% of reading.
Temperature Dependence:
±8 PPM/°C at 1100 PPM.
Non-Linearity:
16 PPM.
Pressure Dependence:
0.13% of reading per mm of Hg.
Response Time:
300 s (
t
63
).
Temperature Limits:
32 to 122°F (0 to 50°C).
Humidity Limits:
10 to 95% RH (non-condensing).
Power Requirements:
16-35 VDC or 19-28 VAC.
Power Consumption:
Average: 2 W; Peak: 3.75 W.
Output: Current:
4-20 mA (max. 500 Ω); Voltage: 0-5 VDC or 0-10 VDC (min. 500
Ω).
Enclosure Rating:
IP54.
Mounting Orientation:
Vertically, with electrical connection pointing downwards.
Weight:
26.24 oz (744 g).
Agency Approvals:
CE.
(OPTIONAL
SUSPENSION
BRACKET)
4-11/32
[110.32]
Ø1/4 [6.35]
2-1/32
[51.59]
4-13/16
[122.23]
6 [152.40]
5-5/32
[130.96]
1-27/32
[46.82]
1-6 MM OR 5-10 MM
CABLE GLAND
(OPTIONAL
4-6 MM OR 6-8MM
M12 CONNECTION)
4 X 3/4
[19.05]
8 X Ø3/16
[4.76]
11/16 [17.46]
2-5/16
[58.73]
Disconnect power supply before installation to prevent electrical
shock and equipment damage
WARNING
Use electrostatic discharge precautions (e.g., use of wrist straps)
during installation and wiring to prevent equipment damage.
Do not exceed ratings of this device, permanent damage not
covered by warranty may result.
Upon powering the transmitter, a warm up period of 30 minutes
is required for the transmitter to adjust to the current CO
2
concentration.
NOTICE
CAUTION
CAUTION
Figure 1: CDWP suspension bracket
Figure 2: Diagram of M12 connector
M12 CONNECTOR
FITS 4-6MM OR
6-8MM CABLE
®
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
