Sherwood Scuba AMPHOS AIR 2.0, Manual

Page: 46 / 54

46
AMPHOS AIR 2.0 DC MANUAL
© Pelagic, 2019 Doc. No. 12-79 3 9 -r01 (11/12/19 )
ALTITUDE SENSING AND ADJUSTMENT
Prior to the first dive of a series of repetitive dives, Altitude (i.e., Ambient Pressure) is measured upon activation of Dive Surface Mode and
every 15 minutes until a dive is made or operation reverts to Watch Default Time.
> While it is operating in Watch mode after a dive, measurements are taken every 15 minutes during the 24 hour period after surfacing.
> Measurements are only taken when the unit is dry.
> Two readings are taken, the second reading 5 seconds after the first. The readings must be within 1 foot (30 cm) of each other to record
that Ambient Pressure as the current Altitude.
The Mathematical Model in the AMPHOS AIR 2.0 accounts for the reduced No Deco Dive Times (NDLs) available based on National Oceanic
and Atmospheric Administration (NOAA) guidelines.
When diving in high altitude waters from 3,001 to 14,000 feet (916 to 4,270 meters), the AMPHOS AIR 2.0 automatically adjusts to these
conditions providing corrected Depth, reduced No Deco Dive Times, and reduced Oxygen Accumulation Times at Altitude intervals of 1,000
feet (305 meters).
No adjustments are made during any time that the Wet Contacts are wet.
At an elevation of 3,001 feet (916 meters), Depth Calibration automatically changes from feet of seawater to feet of fresh water. This is the first
adjustment to the Algorithm.
When the Conservative Factor feature is set On, allowable dive times are calculated based upon the next higher 3,000 foot (915 meter)
Altitude. All adjustments for Altitudes greater than 11,000 feet (3,355 meters) are then made to allowable dive times for 14,000 feet (4,270
meters). If the Conservative Factor is set On while at Sea Level, calculations are based upon an Altitude of 6,000 feet.
The AMPHOS AIR 2.0 will not function as a Dive Computer above 14,000 feet (4,270 meters).
UPLOADING SETTINGS AND DOWNLOADING DATA
The AMPHOS AIR 2.0 is configured with a Data Port that enables it to be connected to a PC or Mac USB port using a special Interface Cable
available as a separate option.
A USB Driver is provided as part of the interface system, a separate option.
The Settings Upload portion of the program can be used to set/change Main Time, Date, Set A group (Alarms), and Set U group (Utilities).
The Set F group (FO2) and FREE Mode Alarms must be entered using the AMPHOS AIR 2.0's button controls.
Information available for retrieval (DownLoad) from the AMPHOS AIR 2.0 to the Download portion of the PC or Mac program includes dive
number, surface interval time, maximum depth, elapsed dive time, start date, start time, lowest temperature underwater, sampling rate, dive
profile, Set Points, NiBG, O2BG, start/end Pressure, and Gas/TRT Switching events.
The AMPHOS AIR 2.0 checks for the presence of an interface device connection to the Data Port once every second while in Watch Default
Time mode. Checks are not made if the Wet Activation contacts are wet. Upon sensing an interface connection, the requesting device (PC,
Mac) connects to the AMPHOS AIR 2.0 and is prepared for Upload of settings or Download of data which are then initiated using the PC or
Mac program.
Prior to attempting to Download data from your AMPHOS AIR 2.0 or Upload Settings to it, review the Help section of the interface program.
Recommended is to print those sections of Help that you consider appropriate for your Interface activities.
ERROR (RESET DURING A DIVE)
If for any reason, the AMPHOS AIR 2.0 shuts Off then turns On again for any reason during any Dive, the message ERR (Error) will be dis-
played with the Up Arrow and current Depth.
If this occurs, it is highly recommended that you terminate the dive and begin a safe ascent to the surface.
Upon surfacing, and any time thereafter, when access to Dive Computer Operating Mode is attempted from Watch Mode, only the message
ERR will be displayed.
No Dive Computer Modes/screens will be accessible.
If this occurs, the AMPHOS AIR 2.0 must be returned to the factory for evaluation/service prior to any further use for diving activities.
ERROR DURING A DIVE
ERROR AFTER SURFACING