Datex-Ohmeda Aespire 7900, User'S Reference Manual

Page: 59 / 118

3 User Maintenance
1009-0633-000
3-11
Flow sensor zeroing
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WARNING Do not perform calibration while unit is connected to a patient.
The system automatically corrects for zero offset when you unplug the flow
sensor connectors with power on. You must stop mechanical ventilation
before you calibrate the flow sensors.
Note: Properly performing the O
2
cell zeroing will also zero the flow sensor.
Step 1
Pull the latch (1) to unlock the
flow sensor module from the
breathing system.
Step 2
Pull the flow sensor module from
the breathing system.
Step 3
When zeroing is complete, the
screen shows, “No Insp flow
sensor” and “No Exp flow
sensor.”
Step 4
Install the flow sensor module.
Step 5
Do a breathing circuit leak test before using the system. Refer to “Breathing system tests” in section 4 Preoperative Tests of the
User Reference Manual, Part 1.
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