Dwyer Instruments CDWP Deries Installation and operating instructions

Series CDWP Carbon Dioxide Transmitter
Specications - Installation and Operating Instructions
Bulletin AQ-CDWP-2
The Series CDWP Carbon Dioxide Transmitter accurately monitors the CO2
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 CO2levels 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 nish 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 t for animal husbandry applications and conned
feeding operations.
Single-beam dual-wavelength sensor advantages:
• Automatically corrects for aging effects in occupied and unoccupied spaces
• Measures actual unltered 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: CO2: 0 to 2000, 0 to 5000, or 0 to 10000 PPM (depending on model).
Accuracy: CO2: ±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 (t63).
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 CO2
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: [phone]
Fax: [phone]
www.dwyer-inst.com
e-mail: [email protected]

Power Supply
Choose a power supply with a voltage and current rating sufcient to meet the power
specications under all operating conditions. If the power supply is unregulated, make
sure the output voltage remains within the required voltage range under all power line
conditions.
CURRENT / VOLTAGE OUTPUTS
The transmitter may be wired for current or voltage output for CO2.
WIRING
Use a minimum of 22 AWG to maximum 18 AWG wire for wiring to terminal blocks.
Refer to Figure 3 for wiring Information.
DIP SWITCH SETTINGS
To access the DIP SWITCH, remove the cover of the unit as shown in Figure 4. The
DIP SWITCH is located on the circuit board.
DIP Switch Position 1: CO2 Output Selection
ON: Output set to voltage output
OFF: Output set to current output
DIP Switch Position 2: Not Used in this product
DIP Switch Position 3 & 4: Current or Voltage Output Range Selection
Dip Switch Position 5: Menu Access
ON: Menu Enabled
OFF: Menu Disabled
DIP Switch Position 6: Not used in this product
Remote Display
The Series CDWP menu parameters can be set up and congured using a remote
display tool, A-449. The mini USB plug of the remote display plugs into the receptor at
the lower right hand corner of the PCBA when the cover is removed.
EDITING MENU PARAMETERS
Before any adjustment can be made to the transmitter, the Menu Lockout Dip Switch
must be set to the ˝On˝ position (see DIP switch #5)
ACCESSING MENU PARAMETERS
Step 1: To enter the menu structure, press Up button and Down button
simultaneously for 5 seconds (display will show RON parameter).
Step 2: Press Up button or Down button to cycle between menu items.
Step 3: Press Enter to edit the value for the displayed menu item (SET will appear
on display).
Step 4: Press Up button or Down button to adjust the value of the menu item.
Step 5: Press Enter button to save the changes (SET will disappear).
Step 6: Repeat Steps 2 through 5 for each of the parameters.
Step 7: To exit the menu at any time, press and hold Up button and Down button
simultaneously for 5 seconds or wait 10 seconds without pushing any
buttons.
Figure 3: Active output wiring diagram
Figure 4: Diagram of circuit board
Figure 5: Diagram of DIP SWITCH
Figure 6: Button board inside of housing
Output Range DIP Switch 3 Position DIP Switch 4 Position
2-10 V
4-20 mA
ON OFF
0-10 V
0-20 mA
OFF OFF
0-5 V
0-10 mA
OFF ON
1-5 V
2-10 mA
ON ON
Up
Calibration
ports
Remote
display port
Enter
Down

Relay on set point
Sets the CO2concentration which the optional relay is energized.
Low limit: 0 PPM
Factory setting: 1000 PPM
High limit: 2000/5000 PPM (depending on model)
Relay off set point
Sets the CO2concentration which the optional relay is de-energized. Setting
value lower than RON provides direct action for detecting high concentrations
of CO2. Setting value higher than RON provides indirect action for detecting
low concentrations of CO2. Up button and Down button on the LCD display
will be lit to indicate when the relay is energized.
Low limit: 0 PPM
Factory setting: 950 PPM
High limit: 2000/5000 PPM (depending on model)
Display conguration
Determines the LCD display conguration during normal operation. The LCD
display can indicate the CO2concentration, temperature, relative humidity
(Series CDTR only) and CO2concentration combined with temperature or
relative humidity (Series CDTR only).
CH CO2concentration and relative humidity (Series CDTR only)
CT CO2concentration and temperature
TH Temperature and relative humidity (Series CDTR only)
C CO2concentration only
T Temperature only
H Relative humidity only (Series CDTR only)
Units selection
Temperature and barometric pressure measurements can be displayed in US
engineering units or SI engineering units. The factory default is to display US
engineering units.
US units °F for temperature and in Hg for barometric pressure
SI units °C for temperature and hPa for barometric pressure
CO2low output range
Sets the CO2concentration for the lowest output (4 mA or 0 VDC).
Low limit: 0 PPM
Factory setting: 0 PPM
High limit: 2000/5000 PPM (depending on model)
CO2high output range
Sets the CO2concentration for the highest output (20 mA, 5 VDC or 10 VDC).
When COH is set above COL, the transmitter is direct acting and the output
will increase with an increase in CO2level. When COH is below COL, the
transmitter is reverse acting and the output will increase with a decrease in
CO2level.
Low limit: 0 PPM
Factory setting: 2000/5000 PPM (depending on model)
High limit: 2000/5000 PPM (depending on model)
Average Atmospheric Carbon Dioxide value
Sets the value at which the sensors automatic background calibration will
reference. Factory setting derived from research from the National Oceanic
and Atmospheric Administration (NOAA).
Low limit: 200 PPM
Factory setting: Current NOAA value
High limit: 9999 PPM
RON
ROF
DSP
UNI
COL
COH
AAC
HOL
HOH
BAR
CAL
RST
Humidity low output range (Series CDTR only)
Sets the humidity for the lowest output (4 mA or 0 VDC).
Low limit: 0.0%
Factory setting: 0.0%
High limit: 100.0%
Humidity high output range (Series CDTR only)
Sets the humidity for the highest output (20 mA, 5 VDC or 10 VDC).
When HOH is set above HOL, the transmitter is direct acting and the output will
increase with an increase in humidity. When HOH is below HOL, the transmitter
is reverse acting and the output will increase with a decrease in humidity.
Low limit: 0.0%
Factory setting: 100.0%
High limit: 100.0%
Barometric pressure
Sets the typical barometric pressure for the location where the transmitter is
mounted. The factory setting is for standard pressure at sea level. Adjusting the
barometric pressure gives a more accurate measurement, especially at higher
elevations. Refer to the elevation charts in Figure 7 for typical barometric
pressures at a given elevation.
Low limit: 20.0 in Hg / 677 hPa
Factory setting: 29.9 in Hg / 1013 hPa
High limit: 32.0 in Hg / 1084 hPa
Calibration
Calibrates the carbon dioxide sensor to a known gas value. Read
calibration instructions before using this feature. Hold Enter button for 5
seconds.
Reset to Factory Defaults
Resets all menu settings to their default value, and clears zero and span.
YES - Press & hold -- button for several seconds to reset settings
NO - Press -- button to exit this menu item without resetting
Menu Descriptions

CALIBRATING SENSOR
To calibrate the sensor please follow the below steps in conjunction with Figure 6.
Note: Calibration requires display accessory A-449 which must be plugged into the
port left of the switches.
Step 1: Remove the unit’s cover.
Step 2: Remove one of the gas nipple covers on the CO2sensor and attach tubing
from the gas pressure regulator to the nipple.
Step 3: Attach the terminal block accessory to the circuit board so that the power wires
line up with terminals 1 and 2. Plug in the power supply to power up the
transmitter. Allow 30 minutes for the transmitter to warm up.
Step 4: Hold housing so that the sensor is in the vertical plane.
Step 5: Flow zero reference gas at 0.3 SLPM for 5 minutes.
Step 6: Press and hold the SW1 (Up) and SW3 (Down) buttons simultaneously for
5 seconds to enter the menu parameters. The “RON” parameter will display
on your A-449 accessory.
Step 7: Use the SW1 (Up) or SW3 (Down) buttons to access the calibration parameter
menu which will display as “CAL”.
Step 8: Press the SW2 (Enter) button. “SET” will then appear on the display.
Step 9: Press the SW3 (Down) arrow for 3 seconds. All dashes will appear on the
display, then release the button. Then after 10 seconds “SET” will disappear.
Step 10: Exit the parameter menu by pressing and holding the SW1 (Up) and SW3
(Down) buttons simultaneously for 5 seconds or wait 10 seconds.
Step 11: Flow the full scale reference gas at 0.3 SLPM for 5 minutes.
Step 12: Repeat steps 6 through 8.
Step 13: Press the SW1 (Up) arrow for 3 seconds. All dashes will appear on the
display, then release the button. Then after 10 seconds “SET” will disappear.
Step 14: Exit the parameter menu by pressing and holding the SW1 (Up) and SW3
(Down) buttons simultaneously for 5 seconds or wait 10 seconds.
Step 15: Disconnect the power supply from the power source and remove the terminal
block from the circuit board.
Step 16: Remove tubing from sensor and re-attach the gas nipple covers to the sensor.
Step 17: Re-attach the cover.
MAINTENANCE/REPAIR
Upon nal installation of the Series CDWP, no routine maintenance is required. The
Series CDWP is not eld serviceable and it is not possible to repair the unit. Field
repair should not be attempted and may void warranty.
WARRANTY/RETURN
Refer to “Terms and Conditions of Sale” in our catalog and on our website. Contact
customer service to receive a obtain a Return Materials Authorization number (RMA)
before shipping the product back for repair. Be sure to include a brief description of the
problem plus any additional application notes.
Printed in U.S.A. 9/20 FR# 444411-10 ©Copyright 2020 Dwyer Instruments, Inc.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: [phone]
Fax: [phone]
www.dwyer-inst.com
e-mail: [email protected]
This symbol indicates waste electrical products should not be disposed
of with household waste. Please recycle where facilities exist. Check with
your Local Authority or retailer for recycling advice.
US Customary Units
ft in Hg
0
400
800
1200
1600
2000
2400
2800
3200
3600
4000
4400
4800
5200
5600
6000
6400
6800
7200
7600
8000
8400
8800
9200
9600
10000
29.92
29.50
29.10
28.69
28.29
27.90
27.51
27.13
26.76
26.39
26.02
25.66
25.30
24.95
24.60
24.26
23.93
23.60
23.27
22.94
22.63
22.31
22.00
21.70
21.40
21.40
SI Units
mhPa
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
1013
1002
990
979
968
957
946
935
924
914
904
893
883
873
863
853
844
834
824
815
806
797
787
779
770
761
Figure 7: Elevation chart