Fieldpiece AOX2 - Oxygen and Carbon Dioxide Accessory Head - Manual

Combustion Check
Accessory Head
Model: AOX2
OPERATOR’S MANUAL
Description
The model AOX2 combustion head measures
%O2 and temperature of flue gases and can calcu-
late the %CO2 found in the products of combustion.
The AOX2 is designed to give you some basic infor-
mation about the combustion process being ana-
lyzed. The AOX2 comes with clips for mounting the
thermocouple to the end of the pump snoot, a water
trap and filter with replacement filters to keep the
sensor clean and free of moisture and a hand pump
for manual aspiration of the sensor.
Since %CO2 is calculated based on a known
fuel, the %CO2 reading is only meaningful when
testing combustion products of the selected fuel.
Use it your way
EHDL1 AHDL1 w/DMM DL2 HS30
How to use
1. Connect to COM and Volts jack. Slide AOX2
combustion check head onto Fieldpiece "stick"
meter, data logger, electronic handle or connect
to most other meters using Fieldpiece ADLS2
deluxe test leads or AHDL1 handle.
2. Set meter to mVDC range.
3. Calibrate if needed (see Field calibration)
4. Clip the thermocouple
to the snoot of the
AOX2 pump using the
included clips making
sure to bend the bead
tip (see photo) for
optimum accuracy.
5. Before inserting the
AOX2 into the flue
ensure that the water
trap is securely fas-
tened on the meter
and that a clean filter
is installed properly.
6. To purge the sensor and pump any left-over
contaminants from the previous measurements
pump uncontaminated air into the AOX2 for one
minute before inserting it into the flue.
7. Select fuel type being burned - OIL or GAS.
8. You must wait until the system you are testing
has stabilized completely before you can take
accurate readings of the flue gas. This means
that the temperatures throughout the systems
have stabilized and there is a steady flow of fuel
in the furnace.
9. Disable Auto-off to data log any of the parame-
ters with the DL2 data logger.
10. Once the system is stabilized and the AOX2
has been purged, insert the snoot into the flue
gas. Select TEMP function and pump vigorous-
ly until the temperature stabilizes (Usually under
2 minutes).
11. Now read temperature of the flue gas, %O2 or
%CO2 directly on your DMM display by select-
ing the appropriate switch position. Make sure
to keep pumping and that the parameter you are
reading is stable.
Water trap with filter
Over time the filter within the water
trap will get dirty and eventually block
airflow. Periodically, check the filter for
excess dust, debris, or contaminents.
1. Compress and twist cap to
open the case.
2. Replace O-ring if it looks
cracked or torn.
3. Replace filter if it looks dirty
or clogged. Make sure you
orient the filter as shown
with the knob of the case
going into the bottom of the
filter.
4. Twist cap back on to seal trap.
Field calibration
Temperature: To calibrate the temperature sensor,
adjust the calibration pot underneath the rubber
covering while measuring a known temperature.
Ice water is very close to 32°F and is readily
available.
1. Stabilize a large cup of ice water.
2. Select TEMP on the AOX2.
3. Make sure the appropriate degree scale is
selected. The scale select switch is underneath
the rubber.
4, Plug in the k-type thermocouple and then
immerse entire metal tip into the ice water.
3. For optimum accuracy at ambient pressure,
adjust the calibration pot to read 31.3°F or
-0.4°C, depending on the scale selected.
AOX2
Combustion
Check
% O
% CO
TEMP
ON
GAS
OIL
Lo Batt
°C °F AUTO
OFF
STABLE
Fuel Type
2
2
T/C
CAL
OFF
2000
AOX2
Combustion Check
% O % CO TEMP
ON
GAS
OIL
Lo Batt
°C °F AUTO OFF
STABLE
Fuel Type
2 2
T/C CAL
AOX2
Combustion Check
% O % CO TEMP
ON
GAS
OIL
Lo Batt
°C °F AUTO OFF
STABLE
Fuel Type
2 2
T/C CAL
AOX2
Combustion Check
% O % CO TEMP
ON
GAS
OIL
Lo Batt
°C °F AUTO OFF
STABLE
Fuel Type
2 2
T/C CAL
AOX2
Combustion Check
% O % CO TEMP
ON
GAS
OIL
Lo Batt
°C °F AUTO OFF
STABLE
Fuel Type
2 2
T/C CAL
NO YES