Analytical Industries AII-4001 Helium Oxygen Trimix Analyzer - Manual (Page 4)

3 General Care & Safety
This means CAUTION. Users must familiarize themselves with the instruc-
tions that accompany the use of this symbol.
Users must read and understand this manual before using the AII-4001 Helium
Oxygen Analyzer.
The AII-4001 displays the MOD or maximum operating depth @ 1.4 ATA of
the mix under analysis. To prevent oxygen toxicity or even death, do not
exceed this depth when diving
Recommendations to ensure an accurate mix:
Adapters, tubing, flow manifold and all three (3) sensors must be free of
liquid before attempting to calibrate or use the AII-4001
Avoid high flow rates which may cause inaccurate readings
Expose the sensors to clean air for several minutes to vent previous mix
Calibrate the AII-4001 as described in section 5.4
Follow established guidelines for allowing the mix to cool after each trans-
fer of helium and oxygen.
Do not leave the AII-4001 open. Liquid, exposure to direct sunlight, the envi-
ronment or extreme temperatures can damage the electronics.
Clean the AII-4001 with a damp soft cloth and a mild cleaner.
The rugged plastic case is capable of absorbing abuse, however, the electronics
and sensors are subject to damage from the excessive shock of being dropped.
The electrochemical galvanic oxygen sensor contains a mildly caustic clear
liquid electrolyte that is very slick to the touch. If you should come in contact
with the electrolyte flush the area immediately with large amounts of water and
seek medical attention, refer to Section 10 MSDS for additional information.
Recharge the battery when the battery symbol on the LCD becomes empty and
the LOW BATTERY warning is displayed. To prevent complete discharge and
permanent damage to the battery, the analyzer turns off automatically 2-3
hours after the LCD displays the LOW BATTERY warning.
Calibrate and sample at very low pressure and flow rates (or regulate the pres-
sure to 1-5 psi and control the flow rate to 1-2 lpm using optional equipment)
to avoid inaccurate readings and damage to the sensors. For example, when
using the dome adapter and tubing supplied, open the tank very slowly until
you hear the gas hissing out.
5 6
4 Specifications
AII-4001 He O 2 Trimix Analyzer
Application: Measure Helium in Oxygen and/or Nitrogen and Oxygen in
Nitrogen and/or Helium and compute balance gas
Accuracy: < +1% of FS range under constant conditions
< +5% of FS range at constant pressure over operating tem-
perature range of 0-45⁰C (0-113⁰F)
Analysis Range: 0-100% Helium, 0-100% Oxygen
Calibration: Dual mode: Ambient air or span gas
Compensation: Normal use: Temperature and barometric pressure
Calibration: O
2
sensor corrected for temperature, barometric
pressure and relative humidity; He sensor corrected for differ-
ences in thermal conductivity of oxygen and nitrogen
Connections: 1/8" push-on fitting
Controls: Water resistant keypad with simple to use one touch keys for
Power ON/OFF; Backlight ON/OFF; ZERO He/CAL O
2
Display: Graphical backlit LCD 2.5 x 2.5”, backlight 30 sec auto OFF
% Helium, % Oxygen, % Bal Gas
Temperature, relative humidity, barometric pressure
MOD - Maximum Operating Depth @ PO2 1.4 ATA
Low battery warning
Enclosure: Watertight IP65, 221 x 190.5 x 96.5 mm (8.7 x 7.5 x 3.8”)
Pressure/Flow: <5 psi/1-2 lpm or open tank slowly until hissing is heard
Power: Rechargeable battery with 15 minute auto OFF
9 VDC power adapter from 110/220 VAC or
9 VDC cigarette lighter adapter for continuous use
Approximately 16 hrs continuous use from 2 hr full charge
Resolution: 0.1% Helium, 0.1% Oxygen, 0.1% Balance Gas
Response Time: 90% of final FS reading < 10 seconds
Sensor Model: He: AII-41-100, O
2
: AII-11-75D, Environmental: AII-E3
Sensor Life: He: 10 yrs; O
2
: 60 mos in air at sea level and 25ºC (77⁰F)
Temp. Range: Operating: 0-45ºC (32-113⁰F), Storage: 0-50⁰C (122⁰F)
Warranty: Analyzer 12 mos; Sensors: He 12 mos, O
2
36 mos prorated