Chapter 5
5-30
Esprit® Ventilator Service Manual © Respironics, Inc.
REF 580-1000-02 G
Repair
Figure 5-18: Sensor PCB LEDs
Bacteria Filter
Back Pressure Test
Follow these steps to check the resistance of any bacteria filter:
1. Power up the ventilator in diagnostic mode and touch the
Hardware
button to view the Hardware screen.
2. Use the default settings in the hardware screen
EXCEPT:
•
Set an air flow rate of 100 LPM
•
Energize the safety solenoid
3. Connect a tube from the main outlet to the bacteria filter inlet.
Important:
Do
not
connect anything to the filter outlet.
4. The displayed
Inhalation Pressure
is the measured back pressure of
the bacteria filter. The back pressure for a new filter is typically 2.5
cmH
2
O.
A back pressure over 4 cmH
2
O indicates an occluded filter. The filter
fails the test if the back pressure is greater than 4 cmH
2
O.
