AIR SYSTEMS INTERNATIONAL AQT-02 User manual

Printed in U.S.A
©Copyright Air Systems International, Inc. 2000. All Rights Reserved.
AIRSYSTEMSINTERNATIONAL,INC.
821JuniperCrescent,Chesapeake,Va.,23320
Telephone[phone]
TollFree 1-800-866-8100
Fax No. [phone]
http://www.airsystems.cc
e-mail: [email protected]
Operating Manual
Models
AQT-02&AQT-COO2
Manual No. MON004
(Rev 2 April 2000)

Air Systems International, Inc. 821 Juniper Crescent Chesapeake VA 23320
Revision2 April 2000 Page 2
OVERVIEW
This series of meters are designed to provide accurate readings for oxygen and/or carbon monoxide levels in
breathing air. The unit can be connected to a low pressure (maximum 100psi) respirator coupling found on a Grade-D
filter device. Bottled air (maximum 6000psi) can also be sampled by adding the high to low pressure adapter (op-
tional).
SETUP/OPERATION
STEP2)
After the display(s) stabilize, reading will be as
follows: %Oxygen-20.9 PPMCO - 00*
If accuracy is in question refer to calibration
procedure. *This display reading applies to Model
AQT-COO2 only.
STEP1)
Place the "on/off/test" switch in the on
position. If amber light is illuminated
replace the 9-volt batteries.
STEP3)
Plug sample hose into coupling
located on left side of box.
STEP4)
Plug free end of sample hose (1/4" Hansen
plug) into coupling on Grade-D filtration
device.
STEP5)
Open the flowmeter valve by turning
the knob counterclockwise until the
flowballhoversinthe"greenbararea"
(50-100cc/min).
STEP6)
Sample air flow approximately 1-2 minutes to get an
accurate reading. Record Oxygen and/or Carbon
Monoxide readings. Note: Carbon Monoxide levels
not to exceed 10ppm, oxygen range 19.5% - 23.5%.

Page 3 Air Systems International, Inc. 821 Juniper Crescent Chesapeake, VA 23320
Revision 2 April 2000
1. Connect AQT-347LP to the bottled to be tested.
2. Close bleed valve. (Turn clockwise).
3. Place the "on/off/test" switch in the on position. If amber light is illuminated replace the 9-volt batteries.
4. After the display(s) stabilize, reading will be as follows: %Oxygen - 20.9 PPMCO- 00*
If accuracy is in question refer to calibration procedure. * This display reading applies to Model AQT-COO2 only.
5. Plug sample hose to female coupling on box and coupling on AQT-347LP.
6. Open bottle valve.
7. Open AQT-347LP regulator by turning clockwise at least 2 full turns..
8. Adjust flowmeter until the flow ball hovers in the "green bar area" (50-100cc/min).
9. Sample air flow approximately 1-2 minutes to get an accurate reading. Record Oxygen and/or Carbon Monoxide
readings. Note: Carbon Monoxide levels not to exceed 10ppm, oxygen range 19.5% - 23.5%.
SHUTDOWN
1. Close bottle valve.
2. Disconnect sample hose from box and adapter.
3. Open bleed valve. (Turn counterclockwise).
4. RemoveAQT-347LP from bottle
OVERVIEW - MODEL AQT-347LP
The AQT-347LP is a high to low pressure adapter which allows testing of high pressure bottles (maximum
6000psi). for carbon monoxide and/or oxygen deficient breathing air. The adapter consists of a CGA-347 hand tight
nut/nipple, high pressure to low pressure regulator, bleed valve, and a 1/4" female coupling. (Note: CGA-347 will
workon a CGA-346).
SETUP/OPERATION

Air Systems International, Inc. 821 Juniper Crescent Chesapeake VA 23320
Revision2 April 2000 Page 4
CALIBRATION PROCEDURE
STEP1)
Place the "on/off/test" switch in the on
position and allow monitor to stablize
in a clean ambient environment.
CalibrationKit- Model No. BBK-20
(Ordered Seperately)
STEP2)
Turn Oxygen Adjustment screw unitl a
20.9% reading is obtained.
STEP3)
Install regulator on the
cylinderofzeroreference
gas.
STEP4)
Insert the male plug from the reference
gas into the socket on the left side of
the case.
STEP5)
Openregulator by turning the knobtwo
turns counterclockwise.
STEP6)
Open the flowmeter valve by
turning the knob counter-
clockwise until the flow ball
hovers in the "green bar area"
(50-100cc/min).
STEP7)
Allow digital readout to stabilze.

Page 5 Air Systems International, Inc. 821 Juniper Crescent Chesapeake, VA 23320
Revision 2 April 2000
STEP8)
Adjust "zero" pot adjustment screw
until "00" reading is obtained.
STEP9)
Turn off regulator and remove it
from the zero air cylinder and in-
stall it on the Carbon Monoxide
reference gas cylinder.
(Calibration of CO Sensor applies
to AQT-COO2 Only!)
STEP10)
Repeat steps 5 - 6.
STEP11)
Adjust the span pot adjustment screw
until the ppm CO display matches the
same concentration found on the CO
gas cylinder.
STEP12)
Turn off regulator and repeat zero ad-
justment procedure (Step 3 - 7) display
should return to a "00" reading.
SHUTDOWN
STEP1)
Disconnect sample hose from box
and coupling.
STEP2)
Turn meter "off". Note: Do not remove 9-volt batteries from unit. A 30 - 60 minute
restabilation of the sensor(s) may be
required if the batteries are removed
for more than 1 hour.

Air Systems International, Inc. 821 Juniper Crescent Chesapeake VA 23320
Revision2 April 2000 Page 6
SENSOR REPLACEMENT
STEP1)
Removethe (4) screws on theright andleft side
of case. Open the case lid and tip the case
forward. The panel should fall into your hand.
If not, lighty pull on the flowmeter knob and
the panel should come free.
STEP2)
Carefully remove old sensor(s) from the sensor
cup(s) and remove sensor leads. Inspect sensor
leads for corrosion and replace if necessary.
STEP3)
Install sensor leads onto new sensors and re-
place in their respective cups.
STEP4)
Place panel in operating position and replace in
(4) mounting screws.
STEP5)
Turn the unit on and allow 30-45 minutes for
the sensor(s) to stabilze.
STEP6)
Calibratemeter.

Page 7 Air Systems International, Inc. 821 Juniper Crescent Chesapeake, VA 23320
Revision 2 April 2000
REPLACEMENT ITEMS