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C7632A,B SENSOR AND CONTROLLER
Table 1. C7632 Wiring Connections (see Fig. 6).
Designation C7632B Wire Color
G+
Red
G0
Black
CO
Brown
2
C7632
G0
CO
G+
2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
Fig. 6. Wiring the C7632.
Output (Table 2)
Table 2. 0-10 Vdc Output Signal.
CO2
0
200 400 600 800 100
Level
(ppm)
Voltage
0
1
2
3
Output
(Vdc)
CALIBRATION
Typically, calibration is unnecessary. No calibration kits are
available. However, if CO
2
desirable level, the sensor can be reset using either zero or
background calibration:
IMPORTANT
• With zero calibration, all CO
calibration skews the sensor zero level.
• Using background calibration, practical operation
(with a higher than zero level set) can be obtained.
Zero Calibration
1. Remove the sensor cover and set it aside.
2. Apply a steady flow of CO
per minute into the gas inlet tube located on the gold
sensor.
3. Execute calibration by shorting the proper two solder-
ing pads (see Fig. 7).
NOTE: The device should now provide accurate out-
put.
By using this Honeywell literature, you agree that Honeywell will have no liability for any damages arising out of your use or
modification to, the literature. You will defend and indemnify Honeywell, its affiliates and subsidiaries, from and against any liability,
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Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell GmbH
Böblinger Straße 17
D-71101 Schönaich
customer.honeywell.com
Function
24 Vac
Common
Analog Output Signal
L1
(HOT)
L2
1
0-10 Vdc
M19799
120
140
160
180
0
0
0
0
0
4
5
6
7
8
9
levels can be brought to a
present during
2
-free gas at 0.1 to 0.5 liter
2
4. Check the output signal. (See Checkout section.)
5. Reinstall the device.
Background Calibration
1. Remove the sensor cover and set it aside.
2. Ventilate the area and reduce occupancy to lower the
CO
levels.
2
3. Maintain a reasonable proximity from the sensor to
avoid breathing on it, thus skewing calibration accu-
racy.
4. Keep the sensor in this environment for three to four
minutes.
5. Execute calibration by shorting the proper two solder-
ing pads (see Fig. 7).
NOTE: The device should now provide accurate
output.
6. Check the output signal. (See Checkout section.)
7. Reinstall the device.
CALIBRATION
200
0
10
Fig. 7. C7632 calibration pads.
CHECKOUT
Perform a quick test of the unit with the unit powered:
1. After calibration:
a. Check output signal immediately following proper
calibration (with minimum environmental change):
(1) Proper zero calibration: 0 Vdc.
(2) Typical background calibration: 2 Vdc. Depend-
ing on ambient CO
2.5 Vdc.
b. If the output is incorrect, repeat calibration
procedure.
c. Otherwise, continue with checkout.
2. Stand close to the unit and breathe air into the sensor.
NOTE: When connected to a damper in a ventilation
system, breathing on the sensor typically
signals an increase in air flow.
3. Check the output to ensure a strong rise in CO
® U.S. Registered Trademark
© 2016 Honeywell International Inc.
63-2615—07
M.S. Rev. 02-16
Printed in U.S.A.
ZERO
BACKGROUND
CALIBRATION
level, range: 1.75 to
2
M19856
level.
2
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