POWER UP AND SELF-TESTS
ROBD2 USER’S GUIDE SEPTEMBER 2016
12
Self-test Operations
Oxygen sensor test
The oxygen sensor test will check the on-board oxygen sensor accuracy. The
system will provide air to the sensor for 20 seconds and report the 02 content as
read by the un-calibrated 02 sensor. If the 02 content falls outside the limits set
by the test, the test will fail. Click OK to acknowledge the failure.
Oxygen dump test (tests the O2 switch, O2 valve and alarm)
This test checks the operation of the emergency oxygen dump switch and the
valve that provides the flow of 100% oxygen. The operator will be prompted in
this test to activate and de-activate the dump switch. Pay close attention to the
prompts. After the switch is tested, the system will verify the operation of the
DUMP valve by verifying that the O
2
sensor reads 100% O
2
. Finally, the test will
sound the audible oxygen alarm. The operator will be prompted to press
OK
if the
alarm is audible and
FAIL
if it is not.
Oxygen pressure switch test
This test will verify that the oxygen pressure switch works properly. The operator
will be prompted to remove pressure from the oxygen port. This can be done by
disconnecting the hose at the O
2
cylinder. The quick connect fitting on the gas
regulator has a check valve. When the hose is removed, the gas regulator is
isolated. Be sure to follow the prompts carefully.
Pulse Oximeter test
This test verifies that the embedded micro controller, of the ROBD2, can
communicate with the integrated pulse oximeter and that the pulse oximeter has
passed its own internal self-test. The pulse oximeter has its own built in self-test
which runs upon power up.
Air MFC shutdown test
This test confirms the operation of a safety feature to shut the system down in
the event of low input air pressure. The air MFC has an alarm signal that
activates if the internal MFC valve opens to maximum capacity. This generally
indicates that there is not enough pressure on the MFC to satisfy the required
flow rate. This would lead to elevated N2 levels in the breathing loop during
normal operation. This feature uses the MFC alarm signal to stop flow and
provide 100% oxygen to the breathing loop. The operator must follow the
prompts to disconnect and reconnect the air source to confirm the passage of
test.
