Dwyer Instruments CDWP Deries Instrucciones de instalación y funcionamiento

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: 219/879-8000

Fax: 219/872-9057

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

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.

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]

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

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

SI Units

mhPa

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

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