IX. MAINTENANCE AND SERVICE- cont.
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4646
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POWER FAILURE AL
POWER FAILURE ALPOWER FAILURE AL
POWER FAILURE ALARM
ARMARM
ARM
(Occurs when CROSSVENT looses power or is turned off)
With the CROSSVENT operating for a minimum of 1 minute, turn the CROSSVENT off with the On/Off
Power Switch.
The LED will flash along with an audible alarm. Press the reset button the left side of the unit to silence
the alarm.
SUPPLY PRESSURE ALAR
SUPPLY PRESSURE ALARSUPPLY PRESSURE ALAR
SUPPLY PRESSURE ALARM
MM
M
With the ventilator connected to a 50 psi gas source and powered on, lower the supply gas pressure to
approximately 31 PSI. The ventilator should alarm.
Raise the pressure back to 50 psi. The alarm should cease.
ALARM QUIET
ALARM QUIETALARM QUIET
ALARM QUIET
With the CROSSVENT cycling and Alarm Quiet inactive, cause the unit to alarm, i.e., remove the patient
circuit. The audible alarm should sound along with a flashing LED.
Press the ALARM QUIET key and verify that the alarm silences for 60 sec.
Press the ALARM QUIET key twice and verify that the alarm silences for 120 sec.
Press it a third time to cancel.
BACKLIGHT
BACKLIGHTBACKLIGHT
BACKLIGHT
While operating on battery, press the middle of Pressure Bar Graph, hold until a second beep is heard (≈3
seconds) and verify that the BACKLIGHT turns off. Press anywhere on the display to turn back on.
LOCK
LOCKLOCK
LOCK
Press LOCK and verify that all functions except the MENU KEYS and ALARM QUIET are locked out.
Press LOCK once and then again within 5 seconds to unlock.
USE THESE SETTINGS FOR THE FOLLOWING TESTS UNLESS OTHERWISE INSTRUCTED:
Rate = 20 bpm; TV = 500 ml; Flow = 30 lpm
ASSIST CONTROL FUNCTIONS (SET TO Assist Control MODE)
RATE
RATERATE
RATE
Connect a patient circuit to a Rate Test Standard and cycle the Crossvent.
Set various RATE settings and verify that delivered rates are within 10% of the set rate.
TIDAL VOLUME
TIDAL VOLUMETIDAL VOLUME
TIDAL VOLUME
Connect the patient circuit to a Tidal Volume Test Standard.
Turn on the unit and set the Max Pressure knob fully CW.
Set the TV (see note) to 200 and Flow to 20 and verify delivered Tidal Volume is within 10%. Repeat for
TV 500, Flow 30; TV 1000, Flow 60; TV 2000, Flow 80.
NOTE: If TV is not displayed under the RATE key, then go into SETUP, press TV/INSP and select
Tidal Volume as the preferred parameter.
SIGH
SIGH SIGH
SIGH
Connect the patient circuit to a Tidal Volume Test Standard.
Activate SIGH and verify the tidal volume is increased to 1.5 times the set tidal volume for the SIGH
breath.
ALARM MENUS
ALARM MENUSALARM MENUS
ALARM MENUS
Exceed each limit, HIGH and LOW, in the menu and verify the ventilator alarms.
SIMV FUNCTIONS (SET TO SIMV MODE)
SIMV BACKUP RATE
SIMV BACKUP RATESIMV BACKUP RATE
SIMV BACKUP RATE
Turn ON the Crossvent.
Connect the unit to a Rate Test Standard.
With the SIMV RATE set to 20 and without initiating a breath with effort, verify the unit delivers controlled
breaths at the set rate.
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