GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

DUCT CARBON DIOXIDE TRANSMITTER

CDDT SERIES

PRODUCT DESCRIPTION

The CO

2 transmitter uses Infrared Technology to

monitor CO

2 levels and outputs a linear 4-20 mA or

0-5/0-10 Vdc signal. Options include a control relay

and a resistive temperature sensor. Features include

a back-lit LCD and user menu for easy installation.

TYPICAL INSTALLATION

For complete installation and wiring details,

please refer to the product installation

instructions.

The duct type sensor installs on the outside of a

return air duct with the sampling tube inserted into

the duct. Mount the sensor in an easily accessible

location in a straight section of duct at least five

feet from corners and other items that may cause

disturbances in the air flow. Avoid areas with

vibrations or rapid temperature changes.

The enclosure provides mounting tabs for ease of

installation.

POWER SUPPLY

20 - 28 Vac/dc (non-isolated half-wave rectified)

CONSUMPTIONS

Current: 120 mA max @ 24 Vdc, 212 mA max @ 24 Vac

Voltage: 79 mA max @ 24 Vac, 129 mA max @ 24 Vac

OUTPUT SIGNALS

4 - 20 mA active (sourcing) or 0-5 Vdc / 0-10 Vdc (field selectable)

OUTPUT DRIVE CAPABILITY

Current: 550 Ω maximum

Voltage: 5K Ω minimum

OUTPUT RESOLUTION

10 bit PWM

INPUT VOLTAGE EFFECT

Negligible over specified operating range

PROTECTION CIRCUITRY

Reverse voltage protected, overvoltage protected

WIRING CONNECTIONS

Screw terminal block (14 to 22 AWG)

EXTERNAL DIMENSIONS

116.5mm W x 112.5mm H x 53.7mm D (4.585” x 4.43” x 2.11”)

ENCLOSURE

IP65 (NEMA 4X)

LCD

Resolution: 1ppm CO

2

Size: 35mm W x 15mm H (1.4” x 0.6”)

Backlight: Enable or disable via keypad

MEASUREMENT TYPE

Dual Channel, Non-Dispersive Infrared (NDIR), diffusion sampling

MEASUREMENT RANGE

0-20,000ppm, programmable span

STANDARD ACCURACY

+75ppm (400-1000 ppm)

>1000 ppm, 10% of reading

TEMPERATURE DEPENDENCE

0.2% F.S. per °C

STABILITY

(0-20,000ppm) <5 %F.S. over life of sensor (10 years typical)

PRESSURE DEPENDENCE

0.13% of reading per mm Hg

ALTITUDE CORRECTION

Programmable from 0-5000ft via keypad

RESPONSE TIME

<2 minutes for 90% step change typical

WARM-UP TIME

<2 minutes

SENSING ELEMENT

Various RTD’s or thermistors as 2 wire resistance output

CONTACT RATINGS

Form A contact (N.O.), 2 Amps @ 140 Vac, 2 Amps @ 30 Vdc

RELAY TRIP POINT

Programmable via keypad

RELAY HYSTERESIS

Programmable via keypad

APPROVALS

CE, RoHS

COUNTRY OF ORIGIN

Canada

SPECIFICATIONS

CABLE GLAND FITTING

THREAD ADAPTER 1/2” NPT TO M16

ACCESSORIES - INCLUDED WITH F ENCLOSURE OPTION

116.5 mm

4.585"

99.7 mm

3.93"

0.5" NPT

112.5 mm

4.43"

53.7 mm

2.11"

152 mm

6"

22.5 mm

0.88"