Novametrix Medical Systems OXYPLETH 520A, Service Manual

Page: 63 / 133

Special Power Up Functions
5-Jun-01 Model 520A Service Manual
53
PRELIMINARY
12.2.19
Press and release the
AUDIO
key. The (Two Minute Silence) indicator
should illuminate and the alarm should be silenced. After two minutes the
indicator turns off and the alarm sounds again (providing the alarm condi-
tion still exists).
12.2.20
With the alarm sounding, press and hold the
AUDIO
key until the (Au-
dio Off) indicator illuminates. Verify that the alarm is silenced.
12.2.21
Press and release the
AUDIO
key. Verify the indicator shuts off and the
alarm sounds.
12.2.22
With the
PROBE OFF PATIENT
alarm still sounding, press the
ALERT RE-
SET
key. Verify the message and alert indicators continue to flash but the
alarm is silenced.
12.2.23
Set the AC Mains switch to the “0” (Off) position. Verify the unit operates
from battery power (provided the battery is substantially charged). Place
the AC Mains switch back to the “|” position.
12.2.24
Press the
POWER
key to turn the monitor off and disconnect the sensor.
12.2.25
Depress and hold the
ALERT RESET
key. Press the front panel
POWER
key
then release both keys. The monitor will power up with the factory default
settings in place. After the self-test is complete, turn the monitor off.
12.2.26
This completes the Functional Test. If the monitor and sensor performed
as described above, they are functionally operational. If the monitor is to
be returned to clinical use, be sure to let the user know that the monitor is
now using its default settings—as these may differ from the user’s “nor-
mal” settings.
Special Power Up Functions
12.3
Each of the Model 520A front panel pushbutton keys is linked to a special “hidden”
power up function. To initiate the special function, start with the monitor off and
press a front panel key. While still holding that key, press the
POWER
key to turn
the monitor on.
AUDIO
= Software (EPROM) Revision Level
Turn the monitor on while holding the
AUDIO
key and the monitor’s soft-
ware revision level is displayed in the message center for as long as the
AUDIO
is pressed. Release the key and the monitor continues with its nor-
mal power up sequence.
ALERT RESET
= Return to factory default settings
Turn the monitor on while holding the
ALERT RESET
key and the monitor
resets all its control settings (including alert limits, averaging times, etc.)
to the factory default values. A
Parameters Reset To Factory De-
fault
message is briefly displayed and the monitor continues with its