3-39. TESTING CARBON MONOXIDE MONITOR. This task covers:
Test Kit, Carbon Monoxide (Appx B, Sec Ill, Item 17)
Any powered condition
Inhalation of carbon monoxide can cause serious illness or death.
a. Install the sensor zero cap (1, Figure 3-23) from the carbon monoxide monitor test kit in the sensor inlet on the CO
b. Wait approximately 1-1/2 minutes or until there is a stable reading on the display (3).
c. Display should read 0. If not, notify unit maintenance.
d. Remove sensor zero cap(1).
e. Install calibration adapter (4) on sensor inlet.
f. Install flow control (6) on calibration gas bottle (7). Connect tubing (8) between flow control (6) and calibration
g. Open flow control (6) by turning valve (9) counterclockwise until it stops. As CO concentration increases on
display, check that alarm 1 alarms at 25 and alarm 2 alarms at 50. After 1-1 /2 minutes the value shown on the display
should read 60. If it differs by more than ± 3, or if alarms do not alarm at the correct point ± 3, call unit maintenance.
Make sure the zero or calibration plugs are not left on the sensor inlet fitting at the
end of the calibration procedure, otherwise the sensor cannot sample the atmos-
phere for carbon monoxide.
Figure 3-23. Testing Carbon Monoxide Monitor