Fieldpiece AOX2 User Manual

Combustion Check
Accessory Head
Model: AOX2

OPERATOR’S MANUAL

Description

The model AOX2 combustion head measures
%O2and temperature of flue gases and can calcu­late the %CO2found in the products of combustion.
The AOX2 is designed to give you some basic infor­mation about the combustion process being ana­lyzed. 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 %CO2is calculated based on a known
fuel, the %CO2reading 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 fas­tened 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 parame­ters 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 vigorous­ly until the temperature stabilizes (Usually under
2 minutes).

11. Now read temperature of the flue gas, %O2or
%CO2directly on your DMM display by select­ing 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.

NO YES

Combustion
Check

TEMP

%CO

%O

°C °F

AOX2

2

2

STABLE

Fuel Type

T/C

CAL

Lo Batt

AUTO

OFF

ON

Combustion
Check

ON

Lo Batt

STABLE

GAS

Fuel Type

OIL

TEMP

%CO

2

%O

2

AUTO

T/C

°C °F

CAL

OFF

AOX2

Combustion
Check

ON

Lo Batt

STABLE

GAS

Fuel Type

OIL

TEMP

%CO

2

%O

2

T/C

AUTO

°C °F

CAL

OFF

AOX2

Combustion
Check

ON

Lo Batt

STABLE

GAS

Fuel Type

OIL

TEMP

%CO

2

%O

2

AUTO

T/C

°C °F

CAL

OFF

AOX2

Combustion
Check

ON

Lo Batt

STABLE

GAS

Fuel Type

OIL

TEMP

%CO

2

%O

2

AUTO

T/C

°C °F

CAL

OFF

AOX2

GAS

OIL

OFF

2000

SPECIFICATIONS

Operating environment: 32°F to 122°F; 0°C to

50°C at <75%RH

Storage environment: -4°F to 140°F; -20°C to

60°C at <80%RH with battery removed from
meter.

Battery life: 85 hours typical (alkaline). No

measurable current draw when in "off" position.

Low battery indication: Red LED lights
Battery: 9V
Auto off: Approx. 15 minutes after mode change
Accessories: ATBF1 k-type thermocouple, hand

pump with water trap, 3 C-clips, 5 filters,
2 O-rings, battery (installed),1 screwdriver, oper­ators manual.

%CO

2

Working range (percent):

0 to 25%

Resolution: 0.1% CO

2

Accuracy:

0 to 25% ±0.3% (calculated)

%O

2

Working range (percent):

0 to 25%

Maximum Overload: 30% O

2

Resolution: 0.1% O

2

Accuracy:

0 to 25% ±0.3%O2(@72°F (22.2°C) 20.9%O

2

ambient)

Stabilization time: under 2 minutes

Temperature

Range (temperature): -58°F to 1000°F; -50°C to

538°C

Resolution: 0.1°F/0.1°C
System Accuracy : ±0.6%+3°F (1.7°C) after field

calibration.

One year limited warranty

This head is warranted to the original purchaser
against defects in material and workmanship for a
period of one year from the date of purchase.
During the warranty period, Fieldpiece will replace
or repair the defective unit, subject to verification of
the defect.

Any damage to the sensor from dirt, mechanical
abuse, or overexposure to damaging chemicals,
including overexposure to carbon monoxide, are
not covered under this warranty. Also not covered
are defects resulting from abuse, neglect, accident,
unauthorized repair, alteration, or unreasonable
use.

ANY IMPLIED WARRANTIES ARISING OUT OF
THE SALE OF A FIELDPIECE INSTRUMENT
PRODUCT, INCLUDING BUT NOT LIMITED TO
IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE,
ARE LIMITED TO THE ABOVE. FIELDPIECE
SHALL NOT BE LIABLE FOR LOSS OF USE OF
THE INSTRUMENT OR OTHER INCIDENTAL OR
CONSEQUENTIAL DAMAGES, EXPENSES, OR
ECONOMIC LOSS, OR FOR ANY CLAIM OR
CLAIMS FOR SUCH DAMAGE, EXPENSES, OR
ECONOMIC LOSS.

Local laws vary. Above limitations or exclusions
may not apply to you. This warranty gives you spe­cific legal rights, and you may also have other rights
which vary by location.

Service

Return any defective AOX2 to Fieldpiece for war­ranty service along with proof of purchase. Contact
Fieldpiece for out of warranty repair charges.

Fieldpiece Instruments, Inc.

California, U.S.A.

www.fieldpiece.com

K-type High Temperature
Thermocouple
Model: ATBF1
Max: 1000ºF

Description

The ATBF1, K-Type thermocouple can be used
continuously to take temperature readings up to
900ºF and a one time use of 1000ºF. The ATBF1
can be used with any thermometer which accepts a
K-type thermocouple. The ATBF1 also comes with a
wrap tab making it easy to wind and store the ther­mocouple.

Operation

To use the ATBF1 plug it into any thermometer or
accessory head accepting a K-type thermocouple
and adjust the device to the appropriate settings.

Calibration

Due to variances in the thermocouple wire and
other parts of the system, a field calibration should
be conducted before use. Field calibration typically
gives +/- 1ºF overall accuracy. See Field Calibration

of AOX2 manual.

SPECIFICATIONS

Thermocouple Conductors: K-type Nickel

Chromium/Nickel Aluminum, 2300ºF maximum
(insulation limits max. see Probe insulation).

Accuracy: -50ºF to 545ºF +/- 4ºF, 545ºF to 1000ºF

+/- 0.75%

Range: -50ºF to 900ºF maximum continuos oper-

ation. Single exposure use up to 1000°F.

Probe insulation: While calibration and atmos-

phere will affect maximum useful temperature in
applications, this insulation is designated to
withstand a maximum continuous use at 900°F
(482°C) and a single exposure use up to 1000°F
(583°C).

Plug: K-Type thermocouple male mini plug.

WARNING

The thermocouple may become hot when
testing hot temperatures. Do not handle the
thermocouple when hot.

!

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