Operating instructions

Operating the Matrix
ATTACHING THE MATRIX TO YOUR REGULATOR
If you have purchased the Matrix in the Pivot
®
console, have your Authorized U.S. Divers Dealer attach the console to
your first-stage regulator. If this is not possible, follow the steps below to do it yourself:
1. Remove the high pressure (HP) port plug from your first-stage regulator using the appropriate wrench. The HP port
on all U.S. Divers first-stage regulators is clearly marked with the letters “HP.”
Note: The end fitting of the HP hose has
7
/
16
" threads. On some early model first-stages, the HP port is only
3
/
8
". If
this is the case with your regulator, you need to purchase a
7
/
16
" female to
3
/
8
" male adapter (U.S. Divers part
number 1017-85) from your U.S. Divers dealer.
2. Thread the end of the HP hose into the HP port of the first-stage until finger tight. Using a
5
/
8
" open-end wrench,
tighten the hose fitting until snug. DO NOT overtighten.
3. Attach the first-stage to a charged SCUBA cylinder. Slowly turn the valve handwheel counterclockwise until the valve
is fully open. Submerge the first-stage in water and check for any leaks. If you detect leaks, take your regulator and
computer to your U.S. Divers dealer and have the O-ring inspected and/or replaced. Then have the U.S. Divers
dealer attach the Matrix to your regulator.
Figure 3
Startup/Diagnostic Mode
STARTUP/DIAGNOSTIC MODE
Starting the Matrix
To activate the Matrix, simply press and release the neon-yellow button (figure 3,a). After
pressing the button, the Matrix displays all “8”s followed by dashes, followed by all the
digits counting down from 9 to 0. During this countdown, the Matrix goes through a self-
diagnostic test to check all its functions, battery power and barometric pressure (alti-
tude).
After the Matrix completes it diagnostics, it goes into Surface Mode and is ready to make
a dive. If you do not make a dive within two hours after turning on the Matrix, the
computer will turn off automatically. Always be sure to check to see if the unit is activated
before entering the water.
WARNING: Never activate the Matrix while underwater. This may
result in inaccurate depth and no-decompression time displays.
Activation is not possible deeper than ten feet.
Low Battery Warning
If the Matrix detects low battery power, the battery warning icon appears (see figure 4,a).
If the battery icon remains flashing on the screen after startup, you have enough power to
complete one day of diving. If you intend to do multi-day diving, replace the battery
immediately.
WARNING: If the low battery icon appears, U.S. Divers strongly
recommends that you DO NOT dive until you change the battery.
Although there may be enough power to finish a full day of diving,
sudden changes in temperature can cause the battery voltage to
drop below the operational level, causing the computer to shut off.
WARNING: DO NOT change the battery between dives, or between
days of diving. Once the battery is removed, all residual nitrogen
information is erased. When the Matrix is activated after new
batteries have been installed, the computer assumes you are on
the first dive of the first day of a multi-day trip. This means the
computer may allow you more no-decompression time than you
really have, resulting in a greater chance of decompression
sickness.
Figure 4
Low Battery Display