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3.6. BOTTOM TIMER MODE
When Icon HD is set to BOTTOM TIMER mode,
it will only monitor depth, time, tank pressure
and temperature, and will not carry out any
decompression calculation. You can only
switch to bottom timer mode if the computer is
completely desaturated. All audible and visual
alarms, other than the low battery alarm, are
turned off.
WARNING
Dives in gauge mode are performed at your
own risk. After a dive in bottom timer mode
you must wait at least 24 hours before
diving using a decompression computer.
During a dive in gauge mode, the following
information is displayed:
- current depth
- max depth
- average depth
- stopwatch
- dive time
- temperature
- time of day
- battery status
- tank pressure
- in case of an ascent: ascent speed (in m/min
or ft/min).
The stop watch is reset by means of
. Upon
pressing and holding the same button, the gas
switch display is called up. The only result of
switching gas mixtures in bottom timer mode
is that the pressure of the newly chosen tank is
displayed instead of the current one.
3.6.1. DIVE VIOLATION INDUCED BOTTOM
TIMER MODE
The following violations can occur during an
Air or Nitrox dive:
- Uncontrolled ascent.
- Missed deco stop.
In case of a violation, Icon HD will restrict
the use of Air and Nitrox mode for 24 hours,
and will only allow operation in Bottom Timer
mode, continuously displaying the message
LOCKED BY PREVIOUS DIVE.
• 4. TAKING CARE OF ICON HD
4.1. TECHNICAL INFORMATION
Pressure gauge function
The pressure gauge integrated with the ICON
HD net ready dive computer has been tested
and CE certified by Registered Test Center
#0426 - ITALCERT, V.le Sarca, 336 - 20126
Milan.
The pressure gauge is a Category III device
as defined under European Directive 89/686/
CEE, and complies with the specifications set
out in the harmonized European Standard
EN 250/2000 for use with air compliant with
Standard EN 12021 (oxygen content of 21%).
The EC certification process and verification
of the operating performance of the pressure
gauge in the ICON HD net ready dive computer
under standards EN 250:2000 and EN 13949:
2003 are understood to be applicable to a
maximum depth of 50 m below the surface.
The ICON HD net ready dive computer can be
used in cold water (water at temperatures
below 10°C).
Marking
The instrument markings are located on the
tank module, and consist of the following:
• working pressure rating: 300 bar / 4,350 psi;
• reference standard: EN 250/2000;
• reference marking: CE 0426.
The conformity marking indicates compliance
with the essential health and safety
requirements as per attachment II D. and
89/686/EEC. The number alongside the EC
identifies the Notified Body #0426 – ITALCERT
V.le Sarca, 336 – 20126 Milan - Italy, authorized
to inspect the finished product under art. 11 B
D.e. 89/686/CEE.
Characteristics
Maximum operating pressure: 360 bar (5150 psi).
Accuracy: The guaranteed accuracy of the
pressure measurement is:
• at 50 bar ± 5 bar • at 750 psi ± 72 psi
• at 100 bar ± 10 bar • at 1450 psi ± 145 psi
• at 200 bar ± 10 bar • at 2900 psi ± 145 psi
• at 300 bar ± 15 bar • at 4350 psi ± 217 psi
Connecting port airflow: <100 liters/min. at a
pressure of 100 bar.
Measurement resolution
Metric: 1 bar
Imperial : 10 psi.
Measurement of high pressure
• every 10 seconds.
Operating altitude:
- with decompression – sea level to
approximately 3700m/12100ft
- without decompression (gauge mode) – at
any altitude
Decompression model: RGBM Mares-Wienke
(10 tissues)
Depth measurement:
- Max displayed depth: 150m/492ft
- Resolution: 0.1m until 99.9m and 1m at
depth deeper than 100m. Resolution in ft is
always 1ft
- Temperature compensation of the
measurement between -10°C to +50°C /
14°F to 122°F
- Accuracy from 0 to 80m/262ft: 1% ±0.2m/1ft
Temperature measurement:
- Measurement range: -10°C to +50°C /
14°F to 122°F
- Resolution: 1°C / 1°F
- Accuracy: ± 2°C / ± 4°F
Digital compass:
- resolution: 1°
- accuracy: ± 1° + 5% of tilt angle (example: at
50° tilt, accuracy is ±3.5°)
- tilt angle: up to 80°
- refresh rate: 1s
Clock: quartz clock, time, date, dive time
display up to 999minutes
Oxygen concentration: adjustable between
21% and 99%, ppO
2
max range between 1.2 and
1.6bar
Logbook memory: over 100 hours of dive
profile at 5-second sampling rate
Operating temperature: -10°C to +50°C /
14°F to 122°F
Storage temperature: -20 to 70°C / -4 to 158°F
Display:
- Diagonal: 2.7”
- Technology: TFT
- Resolution: QVGA 320*240
- Colors: 256000
- Brightness 420cd/m²
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