Dwyer CDWP Manual

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 singlebeam dual-wavelength sensor technology provides the highest level of accuracy compared to Automatic Baseline Correction methods, which can unintentionally shift the calibration based on CO2 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 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

(OPTIONAL

SUSPENSION

BRACKET)

11/16 [17.46]

8 X Ø3/16

[4.76]

4 X 3/4 [19.05]

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.

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.

4-11/32 [110.32]

6 [152.40]

Ø1/4 [6.35]

2-1/32 [51.59]

4-13/16 [122.23]

2-5/16

[58.73]

5-5/32

[130.96]

1-6 MM OR 5-10 MM

CABLE GLAND

(OPTIONAL

4-6 MM OR 6-8MM

M12 CONNECTION)

1-27/32

[46.82]

INSTALLATION

Disconnect power supply before installation to prevent electrical

WARNING

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.

CAUTION

NOTICE

concentration.

shock and equipment damage

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

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

Figure 1: CDWP suspension bracket

M12 Connector Option

The M12 Connection option allows for easy removal of the CDWP before site cleaning operations.

M12 CONNECTOR FITS 4-6MM OR 6-8MM CABLE

Figure 2: Diagram of M12 connector

Phone: 219/879-8000

Fax: 219/872-9057

www.dwyer-inst.com

e-mail: info@dwyermail.com

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.

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)

Calibration

ports

Enter

Down

Figure 3: Active output wiring diagram

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.

Figure 4: Diagram of circuit board

DIP Switch Position 1: CO2 Output Selection

ON: Output set to voltage output OFF: Output set to current output

Figure 5: Diagram of DIP SWITCH

DIP Switch Position 2: Not Used in this product DIP Switch Position 3 & 4: Current or Voltage Output Range Selection

Output Range DIP Switch 3 Position DIP Switch 4 Position 2-10 V

4-20 mA 0-10 V

0-20 mA 0-5 V

0-10 mA 1-5 V

2-10 mA

ON OFF

OFF OFF

OFF ON

ON ON

Remote

display port

Figure 6: Button board inside of housing

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.

Dip Switch Position 5: Menu Access

ON: Menu Enabled OFF: Menu Disabled

DIP Switch Position 6: Not used in this product

Menu Descriptions

Relay on set point

RON

Sets the CO2 concentration which the optional relay is energized.

HOL

Humidity low output range (Series CDTR only) Sets the humidity for the lowest output (4 mA or 0 VDC).

Low limit: 0 PPM Factory setting: 1000 PPM High limit: 2000/5000 PPM (depending on model)

Relay off set point

ROF

Sets the CO2 concentration 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

DSP

Determines the LCD display conguration during normal operation. The LCD

display can indicate the CO2 concentration, temperature, relative humidity (Series CDTR only) and CO2 concentration combined with temperature or relative humidity (Series CDTR only).

CH CO2 concentration and relative humidity (Series CDTR only) CT CO2 concentration and temperature TH Temperature and relative humidity (Series CDTR only) C CO2 concentration only T Temperature only H Relative humidity only (Series CDTR only)

Units selection

UNI

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.

Low limit: 0.0% Factory setting: 0.0% High limit: 100.0%

HOH

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%

BAR

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

CAL

Calibration Calibrates the carbon dioxide sensor to a known gas value. Read calibration instructions before using this feature. Hold Enter button for 5 seconds.

RST

Reset to Factory Defaults Resets all menu settings to their default value, and clears zero and span.

US units °F for temperature and in Hg for barometric pressure SI units °C for temperature and hPa for barometric pressure

CO2 low output range

COL

Sets the CO2 concentration 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)

CO2 high output range

COH

Sets the CO2 concentration 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 CO2 level. When COH is below COL, the transmitter is reverse acting and the output will increase with a decrease in CO2 level.

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

AAC

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

YES - Press & hold -- button for several seconds to reset settings NO - Press -- button to exit this menu item without resetting

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 CO2 sensor 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.

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

Figure 7: Elevation chart

SI Units m hPa

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

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.

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.

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.