6�3� T1/T2 Pressure Display; 6�4� Gtr Display - PERDIX SHEARWATER Operating Instructions Manual

Operating Instructions
6.3. T1/T2 Pressure Display
The pressure displays
(FIGURE 20)
most fundamental AI displays, showing
pressure in the current units (PSI or Bar)�
Additionally, a bar graph represents the
pressure graphically� This bar graph is
scaled from zero pressure up to the rated
pressure setting� This is NOT a battery
level indicator�
T1 T1
3042 210
P
S
I
The AI T1/T2 Pressure Display
FIGURE 20
Low Pressure Warnings:
T1
Reserve
682
P
Pressure
S
I
No Communications Warnings:
T1
No Comms
----
3042
P
Alternates
S
I
No Comms T1
---- ----
P
Alternates
S
I
Low Battery Warnings:
T1
Low Bat
3042 3042
P
Alternates
S
I
Low Bat T1
3042 3042
P
Alternates
S
I
Warning displays
FIGURE 21
Page 14
are the
T1
3042
Zero Rated
Pressure Pressure
B
A
R
T1
Critical
345
P
Pressure
S
I
No communications for
P
30 to 90 seconds
S
I
No communications for
P
greater than 90 seconds
S
I
Battery should be
P
replaced soon
S
I
Battery should be
P
replaced immediately
S
I
6.4. GTR Display
The Gas Time Remaining display
shows the time, in minutes, that you
22)
could stay at the current depth until a direct
P
ascent to the surface at a speed of 33 feet/
S
min (10 m/min) would result in surfacing
with the reserve gas pressure remaining�
I
The value is displayed in yellow when less than or equal to 5
minutes� The value is displayed in red when less than or equal
to 2 minutes�
GTR can only be based on a single tank� The title indicates
which transmitter (T1 or T2) is being used for the GTR and
SAC calculations in a dark gray font� When on the surface, the
GTR displays "---"� GTR is not shown when decompression
stops are needed, and will display "deco".
SAC data from the first 30 seconds of each dive is discarded.
It then takes an additional few minutes to calculate the
average SAC. Therefore, for the first few minutes of each
dive, the GTR will display "wait", until enough data has been
collected to begin making GTR predictions
More information on how GTR and SAC are calculated can be
found in Section 7. How SAC and GTR are calculated�
No GTR
on surface
FIGURE 23
(FIGURE
GTR T1 GTR T1
45 5
The GTR Display
FIGURE 22
GTR T1 GTR
---
wait
GTR display when on surface and at start of dive
GTR T1
45
GTR T1
2
�
(FIGURE 23)
T1
At start of dive,
wait for data to
stabilize
RevA