Analytical Industries AII-4001 Helium Oxygen Trimix Analyzer - Manual (Page 5)

5.2 Power
The AII-4001 is equipped with a rechargeable battery that provides approxi-
mately 16 hours of continuous from a 2 hour full charge. It is supplied with a 9
VDC power adapter 110/220 VAC for charging the battery and operating the
analyzer from external power. An optional 9 VDC cigarette lighter adapter is
available.
When the battery is in need of charging the LCD displays an empty battery
symbol and a warning that reads LOW BATTERY as shown below:
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.
To charge the battery or operate the AII-4001 from external power, insert the
male plug into the CHARGE jack located in the upper right hand corner of the
front panel and connect the adapter to the appropriate AC outlet or DC recep-
tacle.
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5 Operation
5.1 Controls
The AII-4001 is equipped with a waterproof membrane type panel that contains
three color coded push button keys for operating the analyzer.
POWER - press and release the RED key to turn the unit ON or OFF
BACK LIGHT - the YELLOW key has two functions:
1) press and release it to turn the backlight ON or OFF
2) press and hold the YELLOW key for 3 seconds to switch the
LCD display between Imperial and Metric units
CAL O
2 ZERO He - press and release the GREEN key to calibrate the oxygen
sensor, zero the helium sensor and compute the balance
gas in the mix being sampled.
To conserve battery life, the AII-4001 automatically:
Turns off the POWER after 15 minutes of non-use
Turns off the BACK LIGHT after 30 seconds.
Press and release the appropriate RED or YELLOW key to reactivate.
The automatic turn-off features are disabled during charging and when exter-
nally powered.
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