User Manual

3 General Care & Safety
This means CAUTION. Users must familiarize themselves with the instruc-
tions that accompany the use of t his 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 inaccurat e 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 estab lished g uidelines for allow ing the mix to cool after ea ch trans-
fer of helium and oxygen.
Do not leave the AII-4001 open. Liquid, exposure to direct sunlight, the envi-
ronment or extreme tem peratures 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 im mediately with large am ounts of water and
seek medical attent ion, refer to Section 1 0 MSDS for additional information.
Recharge the battery when th e 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 L OW 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 O2 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 conditio ns
< +
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 simp le 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 li ghter adapter for continuous use
Approximately 16 hrs continuous use fr om 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