VIASYS Bear Cub 750PSV, Service Manual, Page: 33 / 98

Service Manual
33
20. Disconnect the AC power. Verify that the audible alarm activates and the line
power LED illuminates red within 10 seconds. Push the Visual Reset button.
Verify that the audible alarm is canceled and the unit continues to function.
Reconnect the AC power.
21. Connect the circuit to the infant test lung. Set the Volume Limit to 25ml. Verify
That the tidal Volume readout is 25 ml ± 20%.
22. Disconnect the Flow Sensor cable from the ventilator. Verify that the flow
sensor alarm activates, assist sensitivity window is blank, and that the
monitored volume and volume limit displays show dashes. Reconnect the flow
sensor cable, verify audible alarm cancels, assist sensitivity window
illuminates, and volume digits return.
23. Turn Assist Sensitivity to MIN. Squeeze and release the patient circuit. Verify
that the unit will assist and that Patient Initiated LED is illuminating.
24. Disconnect the patient circuit from the test lung. Verify that both audible and
visual Low Inspiratory Pressure alarms are activated. Verify that the Alarm
Loudness can be varied from minimum to maximum, but the alarm cannot be
turned off.
Figure 3-1: Bear Cub 750PSV US with Patient Circuit
L2346 Revision B June 2004