Tusa IQ-850 DC-Sapience, Operating Manual

Page: 37 / 47

3 6
Altitude setting
:
The IQ-8 5 0 automatically measures and calculates
the current location's altitude and displays the corresponding altitude
rank. The relation between altitude rank levels and altitudes are
shown below. A new altitude measurement and calculation is made
once every ten minutes. (Fig. 3 4 )
Altitude rank Altitude range
0 0-2952 feet (0-900m)
1 1968-5904ft (600-1800m)
2 4920-8528ft (1500-2600m)
3 7544-19680ft (2300-6000m)
Err Over 19680ft (over 6000m)
When the altitude is over 19680 feet (6000 meters), the display will
blink while showing the altitude rank and ‘Err’ icons and the dive
computer will not function until the altitude drops to a lower level
(under 19680 feet (6000 meters)). The calculations of PGT, OLI and
desaturation time are stopped when altitude is over 19680 feet (6000
meters), and ‘Err’ is displayed; however surface time continues to be
counted. When the altitude is less than 19680 feet (6000 meters),
the display shown before reaching that altitude is displayed again.
The same displays and processing occur if the altitude cannot be
measured for any reason.
Altitude measurements are made during all modes except Dive and
PC transfer mode. The computer will display the current altitude
setting icon in Time Mode and Plan Mode (In Dive Log mode the rank
of the dive is displayed.)
14. Altitude Setting
Warning
The IQ-8 5 0 is not intended for use at altitudes above 19680 ft
(6000 m). Diving at high altitudes carries an increased risk of
decompression sickness.
Figure 3 4