GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

ROOM CARBON DIOXIDE DETECTOR

CD2RMC SERIES

PRODUCT DESCRIPTION

The room CO

2 transmitter device uses a highly

accurate and reliable nondispersive infrared (NDIR)

sensor in an attractive, low profile enclosure for

room applications to monitor 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. These technology features ensure

optimum measurement stability for both periodic

and constant occupancy applications, so the device

is equally suitable for a classroom or a hospital

room.

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 CO

2

measurement span, a backlit alpha-numeric LCD

and easy menu operation for configuration.

Optional features include a resistive temperature

sensor output (with LCD display of temperature

in either °C or °F), 2 button setpoint adjustment,

a control relay with programmable setpoint,

hysteresis and time delay, and a dry-contact

override switch.

TYPICAL INSTALLATION

For complete installation and wiring details,

please refer to the product installation

instructions.

The CD2RMC series can be mounted directly to

a single gang electrical box or directly to a wall.

The backplate includes many mounting hole

configurations to allow for mounting on a variety of

electrical boxes.

The basic CD2RMC 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 channel non-dispersive infrared (NDIR)

SENSOR ACCURACY

± (30ppm + 3% of measured value)

MEASUREMENT RANGE

0-2000ppm, adjustable 1000 - 10000ppm

TEMPERATURE DEPENDENCY

±2.5ppm/

°C

RESPONSE TIME

20 seconds (T63)

WARM-UP TIME

1 minute

SENSOR COVERAGE AREA

100 m2 (1000ft2) typical

SENSOR LIFE SPAN

>15 years

TRANMSITTER 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 protected 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

Current: 75 mA @ 24 Vdc max, 150 mA @ 24 Vac max

Voltage: 50 mA @ 24 Vdc max, 100 mA @ 24 Vac max

OUTPUT DRIVE @ 24 VDC

Current: 550Ω max

Voltage: 10,000Ω min

AMBIENT OPERATING RANGE

0 to 50°C (32 to 122°F), 0 to 95 %RH non-condensing

STORAGE TEMPERATURE

-40 to 70°C (-40 to 158°F)

LCD DISPLAY

Units: ppm (CO

2), °C/°F (optional temperature/setpoint)

Range: 0 to 10000ppm, 0 to 50°C (32 to 122°F)

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

Digit Height: 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)

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

OPTIONAL OVERRIDE SWITCH

(2-WIRE OUTPUT)

Rating: 50 mA @ 12 Vdc max

OPTIONAL SETPOINT CONTROL

Type: Front panel up/down pushbuttons

Range: ±10 resistive steps, range 16 to 26°C in 0.5°C increments or 60 to 80°F in 1°F

increments

Midpoint: Default 21°C/70°F, programmable 18 to 25°C (64 to 77°F)

Resolution: Programmable 0.5 / 1°C/°F

Action: Programmable direct or reverse acting

ENCLOSURE

Material: ABS, White

Dimensions: 84mm W x 119mm H x 29mm D (3.3” x 4.7” x 1.15”)

Protection: IP30 (NEMA 1)

WIRING

Screw terminal block (14 to 22 AWG)

APPROVALS

CE

COUNTRY OF ORIGIN

Canada

SPECIFICATIONS

NOTE: This CO

2 sensor incorporates a Self Calibration feature to correct CO2 sensor drift. This feature is

recommended for applications where the CO

2 level will be close to normal (400 ppm) at least one hour per

day. If the monitored space is occupied 24 hours or consistently maintains higher or lower levels of CO

2, it is

recommended that this feature be turned off, but yearly calibration will be required.

58 mm

2.3"

82.6 mm

3.25"

29 mm

1.15"

119 mm

4.7"

84 mm

3.3"