GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

OUTSIDE CARBON DIOXIDE TRANSMITTER

CD2OS SERIES

PRODUCT DESCRIPTION

The outside CO

2 transmitter device uses a highly

accurate and reliable non-dispersive infrared

(NDIR) sensor in an vented, weatherproof

enclosure to monitor outside CO

2, levels. The

sensor uses dual wavelength optics and LTA (long

term adjustment) signal processing technology to

deliver industry leading long-term accuracy and

reliability.

Standard features include a field selectable output

signal of either 4-20 mA, 0-5 Vdc or 0-10 Vdc

for the highest versatility, programmable CO2

measurement span, a backlit alpha-numeric LCD

and easy menu operation for configuration.

Optional features include a resistive temperature

sensor output and a control relay with

programmable setpoint,hysteresis and time delay.

TYPICAL INSTALLATION

For complete installation and wiring details,

please refer to the product installation

instructions.

The CD2OS should be mounted on an outside

North facing wall, under the eaves which will

provide protection from direct sunlight and wind.

The CD2OS can be mounted directly to buildings

wall face using the provided mounting holes. There

are 0.85” knockouts for conduit connection.

The basic CD2OS has a 3 wire configuration with

a screw block terminal provided for connection to

the Building Automation System.

GAS TYPE DETECTED

Carbon Dioxide (CO

2)

SENSOR TYPE

Dual Wavelength Non-Dispersive Infrared (NDIR)

SENSOR ACCURACY

± (30ppm + 3% of measured value)

MEASUREMENT RANGE

0-2000ppm, adjustable 1000 - 10,000ppm

ALTITUDE ADJUSTMENT

0-2550m in 50m increments

TEMPERATURE DEPENDENCY

±2.5ppm/°C

RESPONSE TIME

20 seconds (T63) - See Note

WARM-UP TIME

1 minute

SENSOR LIFE SPAN

>15 years

TRANSMITTER ACCURACY

±0.25% of span (including linearity, hysteresis and repeatability)

POWER SUPPLY

24 Vdc ± 20% or 24 Vac ± 10% (non-isolated half-wave rectified)

PROTECTION CIRCUITRY

Reverse voltage and transient protected

INPUT VOLTAGE EFFECT

Negligible over specified operating range

OUTPUT SIGNAL TYPE

4-20 mA (3-wire), 0-5 or 0-10 Vdc (field selectable)

CURRENT CONSUMPTION

(4-20 mA OUTPUT)

Heated: 1.0A max @ 24 Vdc 1.1 A max @ 24 Vac

Unheated: 75 mA max @ 24 Vdc 150 mA max @ 24 Vac

CURRENT CONSUMPTION

(0-5/10 Vdc OUTPUT)

Heated: 1.0 A max @ 24 Vdc

1.1 A max @ 24 Vac

Unheated: 50 mA max @ 24 Vdc

100 mA max @ 24 Vac

OUTPUT DRIVE @ 24 VDC

Current: 550Ω max

Voltage: 10,000Ω min

OPERATING CONDITIONS

Heated: -40 to 50°C (-40 to 122°F)

Unheated: 0 to 50°C (32 to 122°F)

5 to 90 %RH non-condensing

STORAGE CONDITIONS

-40 to 70°C (-22 - 158°F), 5 to 90 %RH non-condensing

CONCEALED LCD DISPLAY

(USED FOR SETTING PARAMETERS)

Units: ppm (CO2)

Range: 0-10,000ppm

Size: 35mm W x 15mm H (1.4” x 0.6”), Alpha-numeric 2 line x 8 character

OPTIONAL TEMPERATURE SENSOR

Type: Thermistor and RTD (see ordering chart)

Accuracy: See ordering chart

Output: 2-wire resistive

OPTIONAL RELAY (2-WIRE OUTPUT)

Selectable CO

2 high or CO2 low

Rating: Form A (N.O.), 2 Amps @ 140 Vac / 30 Vdc

ENCLOSURE

110mm W x 180mm H x 89mm D (4.3” x 7.125” x 3.5”) IP65 (NEMA 4X)

WIRING CONNECTIONS

Screw terminal block (14 to 22 AWG)

Optional Temperature: Pigtail, 2 or 3 wire

APPROVALS

CE

COUNTRY OF ORIGIN

Canada

SPECIFICATIONS

NOTE: The outside enclosure slows the sensor response time to approximately 30 minutes for a 90% step

change of CO

2 concentrations.

95mm

3.75”

165mm

6.5”

109mm

5.3”

89mm

3.5”

180mm

7.125”

North

Outside CO

2

Transmitter