90
Functional test
CHECKING THE STATUS SCREEN FOR ERRORS
When the device is started, it carries out a self-test. If any errors are detected,
the status screen is automatically displayed (see Fig. 49). Possible errors
must
fi
rst be corrected before the device can be used.
CHECKING THE DATE AND TIME
Switch to the comfort screen and check the date and time. If necessary,
correct the setting (see page 66).
CHECKING THE “BATTERY OPERATION” ALARM
Remove the device from the mains power. An alarm must sound and the
message “Battery Operation” must appear in the display.
CHECKING THE LEAKAGE ALARM
Remove the test lung from the device. After at most 15 seconds, an alarm
must sound and the message “Leakage” must appear in the display.
CHECKING “FREQUENCY TOO HIGH” ALARM
Select PSV as the ventilation mode. Set the frequency to 12 bpm and the
alarm parameter “Max. Frequency” to 20 bpm. Start ventilation. Simulate an
increased respiration rate by squeezing the test lung, until the alarm sound
is triggered and the message “Frequency too high” appears on the display.
Fig. 49: Status screen with
error message
Summary of Contents for TRENDvent
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