4. Insert the flue probe into the sample hole of the device under test. The
probe tip should be in the middle of the flue pipe or exhaust stream.
Ensure the In-Line Filter / Water Trap hangs below the analyzer in the proper
vertical position when readings are being taken. Failure to comply reduces
the effectiveness of the water trap and may result in damage to the instru-
ment. Refer to the pictures below for correct and incorrect use.
WARNING:
- Should the CO reading rise above 2,000ppm a continuous series
of Alarm Beeps will be heard. The Probe should immediately be disconnected
from the instrument and the instrument returned to a clean air environment.
This Alarm alerts the user that there is a high concentration of CO, and this
procedure will protect the sensors within the instrument. The alarm level can
be changed. Please see Appendix D
Make sure to check the water trap periodically during testing to ensure it
does not fill with condensate and empty it as necessary. If the filter begins to
fill during a test, open the lid and empty out the condensate. After closing the
lid, allow readings to stabilize again.
IMPORTANT:
The water trap is fitted with a water block filter (p/n A794W) in
the lid to prevent water from flowing down into the pump. If the water trap
fills the water block filter will stop the flow to the analyzer and FLO ERR will
display. The water trap should be emptied immediately if this happens. The
water block filter may need to be dried out or replaced before testing can
resume.
16
5. Allow the readings to stabilize. Multiple combustion analysis displays are
available to provide the various test results. Use the Scroll/Enter Key to move
through the various combustion displays.
•
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. The 712 calculates
this number by first converting the CO2 measurement from
percentage to ppm. The formula for this conversion is:
CO2ppm=(CO2%*10,000). This ratio is not used in any other
calculations. 10,000ppm = 1%
Pressing the Scroll Enter key changes the display:
•
Combustion Display 2
• Displays Oxygen (O2) reading in percentage (%)
• Displays calculated Excess Air (X Air) figure in percentage
• Displays calculated Efficiency (Eff.) figure in percentage
• Pressing the Up Arrow Key will toggle between Gross &
Net Efficiency
(Note: Gross Efficiency is used in the USA)
Pressing the Scroll Enter key changes the display:
•
Combustion Display 3
• Displays Carbon Monoxide (CO) reading in parts per million
(ppm)
• Displays Oxygen (O2) reading in percentage (%)
Pressing the Scroll Enter key changes the display: (Next Page)
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