CD-W00-x0-2 Series Wall Mount CO
2
and Temperature Transmitters Installation Instructions
4
3. Insert the locking screw on the top of the
transmitter and secure the locking screw with a
#1 Phillips-Head screwdriver.
If power is supplied to the screw terminals, the
transmitter starts when you close the cover.
Setup and Adjustments
Commissioning
CD-W00-x0-2 Series Wall Mount CO
2
and
Temperature Transmitters come from the factory
calibrated for the following:
•
output signal (0 to 10 V and 4 to 20 mA)
proportional to CO
2
concentration (0 to 2,000 parts
per million [ppm])
•
altitude range of 0 to 2,000 ft (0 to 600 m) without
compensation
For altitudes above 2,000 ft (600 m) where optimum
accuracy of the CO
2
concentration measurement is
essential, modify the Building Automation System
(BAS) controller’s analog input (AI) high range to
compensate for sensor placement at other than the
standard calibration altitude.
To do this, reset the 2,000 ppm value using the
controller’s compensation factor (CF) shown in
Figure 7 or Figure 8.
Calculate the corrected value:
Corrected Value = CF x 2,000
For example, if the sensor is situated at an altitude of
3,000 ft (914.4 m) above sea level, the CF is 1.10 (see
Figure 7 or Figure 8). The corrected value is:
Corrected Value = (1.10)(2,000 ppm) = 2,200 ppm
Note:
For altitude compensation, only adjust the AI
high range. The AI low range should remain at zero.
CF
Altitude (Feet)
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
1,000
2,000
3,000
4,000
5,000
6,000
7,000
0
F
IG
:a
lt
co
m
p
_
ft
Figure 7: Altitude Compensation, Feet above Sea Level
CF
0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200
Altitude (Meters)
1.15
1.10
1.05
1.00
0.95
0.90
1.20
1.25
1.30
F
IG
:a
lt
c
o
m
p
_
m
Figure 8: Altitude Compensation, Meters above Sea Level
