IMPORTANT:
Prior to taking a sample, the device under test should be on and
at operating temperature.
Putting the flue probe in the sample area prior to
starting the device may cause saturation of the sensors due to the higher
initial concentration of carbon monoxide that may be encountered upon
start up.
If this happens, allow your analyzer to purge in fresh air until the
carbon monoxide level returns to 0 ppm and the oxygen level returns to
20.9%. This may take more than an hour depending on how saturated the
sensors are.
3. Drill a 1/4 inch hole into the flue of the device under test. For most applica-
tions, flue gas samples should be taken prior to the draft diverter or any
other opening that allows room air to enter the system. This prevents room
air from mixing with gases in the flue and diluting the test sample.
It is important to use manufacturers recommended test locations whenever
possible.
Refer to the figure below for calculating the sample hole location.
The figures on the following pages show typical test locations on commonly
encountered equipment.
13
Combustion Analyzer
(Default Start Up Mode)
COMBUSTION TEST PROCEDURE
Note: It is recommended you perform routine general maintenance on your
analyzer to ensure proper function. Please refer to Appendix A for general
maintenance schedule and function tests.
1. Turn the 712 on in fresh air as outlined on page 8. After the initial purge
cycle the 712 will default to combustion analyzer mode and combustion dis-
play 1 will be seen.
•
Combustion Display 1 (Default Start Up Display)
• Displays Carbon Monoxide (CO) reading in parts per million
(ppm)
• Displays calculated Carbon Dioxide (CO2) figure in percentage
(%)
• Displays calculated CO/CO2 (Ratio) figure
2. Connect the Mini Pump Protection Filter assembly and Flue Probe Tubing
complete with In-Line Filter to the Gas Sample Port and the 'K' Type
Thermocouple Plug from the Flue Probe into Thermocouple (T1) Socket. The
GK11M ambient air temperature probe is connected to the (T2) socket. (See
below & page 7)
WARNING
: - Ensure the 'K' type thermocouple probes are inserted into the
sockets correctly (see page 7). The plugs are polarity marked and forcing the
plug into the socket the wrong way may result in damage to the instrument.
Mini Pump
Protection Filter
Assembly
Ambient Air
Connection (T2)
GK11M Probe
Flue Probe
Connection (T1)
In-line Filter
Assembly
Flue Probe
Tubing
12
