Appendix G: Testing for Carbon Monoxide in Ambient Air
The 708 can be used to test for carbon monoxide in ambient air. For example
tests can be performed in work spaces and living areas like offices and houses
to ensure safety.
1. Following the steps outlined on page 8, turn the analyzer on in a clean air
environment away from the area to be tested,
2. After the purge cycle is complete combustion display 1 will be seen. This is
the default start up display and is the display to use when performing this test.
Please see below.
The top display shows the carbon monoxide level.
For this test, ignore the middle and bottom displays.
3. Connect the Mini Pump Protection filter to the analyzer. See picture below.
4. Begin testing for carbon monoxide. Move from space to space to detect any
CO that may be present. The CO reading will be seen in the top part of the dis-
play.
5. If necessary, the flue probe can be attached to test in ducts and plenums.
6. Refer to the chart on page 40 for a list of exposure times and levels of carbon
monoxide in ambient test applications and page 41 for carbon monoxide facts.
7. When testing is complete, turn the analyzer off as outlined on page 8.
39
Appendix F: Technical Notes
Note 1:
When performing a pressure or draft test during a combustion test, the
pump can be turned on to provide a continuous sample to the sensors. This
enables pressure adjustments to be made and the affect to the combustion
process can be seen by returning to combustion analyzer mode. Use the FUNC
Key to activate manometer mode. Press and hold the Up Arrow Key until the
pump reactivates. Perform a pressure test and then use the FUNC key to acti-
vate combustion analyzer mode. Repeat this process until pressure adjustments
are complete.
Note 2:
Several factors affect combustion efficiency. Dirty or clogged air filters
reduce the amount of air available for combustion therefore reducing efficiency.
Obstructions in the flue block exhaust gases and alter the air mixture in the
combustion chamber which reduces efficiency. Air leaks in the combustion
chamber also alter the mixture causing decreased efficiency.
Note 3:
The primary way to affect change in combustion efficiency when work-
ing with modern gas fired equipment is through gas manifold pressure adjust-
ment. Confirm manifold pressures are within maufacturers specifications prior
to performing a combustion test. Once manifold pressures are within limits a
combustion test can be performed to provide information regarding any adjust-
ments that may be needed.
38
w
w
w
.
G
lo
ba
lT
es
tS
up
pl
y
.c
om
Fi
nd
Q
ua
lit
y
Pr
od
uc
ts
O
nl
in
e
at
:
sa
le
s@
G
lo
ba
lT
es
tS
up
pl
y.
co
m
