Manual 7960-902
Page
2 of 6
SPECIFICATIONS
Sensor:
Single beam, dual-wavelength NDIR.
Range:
CO2: 0 to 2000 or Oto 5000 PPM (depending on
model); Temperature: 32 to 122°F (0 to 50°C).
Accuracy:
CO2: ±40 PPM ±3% of reading; Temperature:
±1°C @ 25°C.
Temperature Dependence:
±8 PPM/°C at 1100 PPM.
Non-Linearity:
16 PPM.
Pressure Dependence:
0.13% of reading per mm of Hg.
Response Time:
2 min for 99% step change.
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 O); Voltage: 0-5
VDC or 0-10 VDC (min. 500 O); Relay: SPST NO rated
2A@ 30 VDC; RTD or thermistor per r-t curves on page 6
(depending on model).
Weight:
4.4 oz (125 g).
Agency Approvals:
CE.
INSTALLATION
Disconnect power supply before
installation to prevent electrical shock and
equipment damage.
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.
Use electrostatic discharge precautions
(e.g., use of wrist straps) during
installation and wiring to prevent
equipment damage.
Avoid locations where severe shock or
vibration, excessive moisture or corrosive
fumes are present.
Do not exceed ratings of this device,
permanent damage not covered by
warranty may result.
Upon powering the transmitter, the
firmware version will fiash on the display. A
warm up period of 30 minutes is required
for the transmitter to adjust to the current
CO2 concentration.
Self calibration feature of the transmitter
requires exposure to normal outdoor
equivalent carbon dioxide level once every
30 days.
MOUNTING
1. Push tab on top and bottom of cover and lift cover
from back plate (see Figure 1).
2. Select the mounting location, away from diffusers,
lights or any external influences.
3. Mount transmitter on a vertical surface to a standard
electrical box using the two #6 M2C type screws
provided.
FIGURE 1
Removal of Cover from Back Plate
WIRING
Use maximum 18 AWG wire for wiring to terminals. Refer
to Figure 4 for wiring information.
DIP SWITCH SETTINGS
To access the DIP switch, remove the cover of the unit as
shown in Figure 2. The DIP switch is located on the back
of the circuit board.
FIGURE 2
Diagram of Circuit Board
DIP Switch
FIGURE 3
DIP Switches
4. Pull wires through sub base hole and make necessary
connections.
5. Reattach cover to base plate.
