Poseidon SE7EN User Manual
Appendix 3 Page 94
The Poseidon SE7EN electronics system conducts over fifty automated and semi-automated
tests during the pre-dive routine. This procedure verifies a wide variety of parameters, and
takes about three minutes to complete. A full description of all of the tests is included in
Appendix 1 of this Manual, but a general description – including tests that require intervention – is
included here.
Note that if the depth is greater than zero, the system automatically shifts into Dive Mode, and
alerts the diver to abort the dive due to a failure to complete the pre-dive routine.
DANGER:
Do not attempt to breathe on the Poseidon SE7EN during the
automated pre-dive routine. Oxygen control is disabled during
portions of this routine, so doing so involves a risk of hypoxia. Do
not attempt to conduct a dive until the system has successfully
completed the pre-dive routine.
Power-up self test (Test 1 - 38)
The first series of tests (numbers 1–38) are referred to as Power-Up Self-Tests (or PSTs). They
are internal checks on the functionality of all of the various sensors, computers, actuators, and
alarm systems in the Poseidon SE7EN. You will see and hear the rig as it tests the HUD light
and vibrator, and the battery lights and speaker systems. Similarly, you may also hear the rig
opening and closing some of the gas control valves. A very brief summary of these PSTs is as
follows:
• Test 1: Confirms the main data logger is functional
• Tests 2–9: verify the ROM, RAM and EEPROM function in all four processors
• Test 10: verify the Bluetooth functionality
• Test 14: Confirms the battery data logger is functional
• Test 15: Confirms the firmware version is consistent across all four processors and with
M28 unit.
• Test 16: Confirms the power consumption calculations are functioning properly
• Tests 17–20: Confirm the power-draw of the backlight and alarms are correct
• Test 22: Vibrator current test
Test numbers 1–16 conduct precise measurements of the power consumption of individual
components, such as the various alarms and solenoid valves. While the test is running, the test
number is displayed in the circle, and the outer circle represents a progress bar. The thin inner
green circle represents the remaining time available for each individual test to complete before
it times out. Different tests require different amounts of time to complete; some require less
than one second, others require 4–12 seconds to complete. Certain tests that involve some
action by the diver allow for up to 2 minutes to complete, if necessary.
• Test 23: Mouthpeice CC test
• Tests 24-27: Solenoid current test
• Test 29: Speaker current test
• Tests 30-31: Cylinder HP sensor validation
• Tests 34-35: PO
2
sensor validation test
• Test 38: Depth/temperature sensor validation
Figure 2-5.
Test 17 (Backlight Power
consumption), displaying test number in the
center circle, progress is shown through the
inner green circle moving counter clockwise.
Figure 2-6.
Test 17 failure, with flashing
error code.
