3900/3900P User’s Manual
2-6
5.
To turn on the oximeter, press the power button.
The first screen shows the Datex-Ohmeda logo and the model name
(Model 3900 or Model 3900P).
Important:
If the low SpO
2
alarm limit was saved at a limit lower than 80%
(or at OFF), you will be alerted by a screen message that shows the current
low SpO
2
alarm limit and alarm volume level:
LIMITS SAVED
LOW SpO
2
= 75%
The next screen shows the averaging mode in effect, the SpO
2
calibration
mode, the progress of the self-test, and the status of the battery charge.
Averaging Mode:
Long
SpO
2
Calibration:
Functional
Self-test in progress …
(indicates battery-charge status)
Below the bar graph, the version number of the unit’s system and oximetry
software appears as Version X.XXX/YY.YYY, where X’s represent the system
software version and Y’s the oximetry software version.
Diagnostic self-test
During this time the system performs a diagnostic self-test (electronics,
battery status, analog signal path integrity, calibration check) and sets the
default parameters. This self-test takes approximately 10 seconds.
•
A start-up tone sequence tests the audio circuit; all display LEDs and
the LCD backlight are illuminated, then blanked.
•
The alarm LED toggles between red and yellow while a numeric
countdown from 9 to 0 occurs on each seven-segment LED display
ending with a decimal point.
•
A battery icon is displayed to indicate the battery condition as either
charged, depleted, or defective/missing (see chapter 3).
Upon successful completion of all diagnostic self-tests, the unit is
considered to be in calibration and begins normal operation. This message
is displayed:
Test passed. In calibration.
If the unit does not pass the self-test, an error message is displayed and the
unit is inoperable.
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