Manual Aeris A300 (page 6 of 56) (English)

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A300/A300 XT OPERATING MANUAL

Fig. 2 - NORM SURF MAIN

Fig. 1 - DIAGNOSTIC

OVERVIEW

The A300 model features FREE Dive mode as well as NORM, TECH, and GAUG modes.

The A300xt model features a Tank Pressure alarm (actuated by an reed switch) for an analog pressure

gauge mounted in the same console as the dive computer module.

NORM mode is intended for the casual diver who plans to use a single gas and does not yet wish to

conﬁgure the numerous settings and alarms, many are factory set at predetermined ﬁxed values.

TECH mode allows the user to conﬁgure all settings and alarm values using the control buttons or PCI

program, and set up and switch between multiple gasses.

GAUG mode is for those using the units as digital gauges with no Ni-O2 calculations.

FREE mode (A300 only) is for those using the unit for breath hold activities without scuba.

ACTIVATION & DIAGNOSTICS

A momentary press/release of any button will activate the unit. It will not activate at a depth deeper

than 5 FT (1.5 M) or at an Altitude higher than 14,000 feet.

The unit has contacts that will cause it to activate and enter Dive Mode upon descent to 5 FT (1.5 M)

for 5 seconds.

The contacts are the buttons and the pins of the PCI (PC Interface) data port. Conductivity between

any button and any pin (being wet) will satisfy the activation bridge.

Upon wake up, the unit will check for depth once per second. If depth is not sensed within 10 minutes,

it will enter PSM (Power Saver Mode). Once a dive is made, it will continue checking for depth until

the Time to Fly and Time to Desaturate counters reach 0:00 (hr:min), 24 hours post dive max, and the

unit shuts Off.

Immediately following manual (push button) activation (not if by wet activation), all segments of the

LCD are displayed (Fig. 1) followed by a countdown from 8, -, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 (approx 3

sec). If sensor readings and battery voltage are within tolerance, the NORM Surface Main screen is

displayed (Fig. 2).

If any value is not acceptable, the failure description will ﬂash for 5 seconds for each type failure. If

more than one failure is sensed, the failures will be presented sequentially in the following order.

EEP >> Eeprom error; CAL >> Calibration error; ALT >> higher than 14000 feet or deeper

than 5 feet; BAT >> Battery voltage too low (icon ﬂashing); A-D >> A/d over range

Once the unit is activated, regardless of what mode it is in, it will enter the selected Dive Mode upon

descent to 5 FT (1.5 M) for 5 seconds.

By accessing the Set OP MOD selection (Fig. 3) in the SET group, the Operating Mode can be

changed from NORM to TECH, GAUG, or FREE (A300 only).

Once a mode is selected, operation remains in that mode until changed.

Once a dive is made in GAUG mode, operation locks into GAUG for 24 hours after surfacing.

While the Surface Main screen is displayed, access to other modes and screens is allowed. They will

remain on display for 2 minutes or until a button is pressed to access another mode or screen.

Fig. 3 - TO ACCESS SET

OPERATING MODE

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Aeris A300 Manual

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