SLE 2000 HFO, Руководство по обслуживанию

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Issue 10 (01/10/2004) Page 53 of 258
13.5 Freeze Push-Button
1) Press FREEZE push-button and confirm that ‘FREEZE’ message is displayed for 1
minute ± 3 seconds. Displayed waveform should not update during this period. After 1
minute the display should revert to updating mode.
2) By pressing FREEZE push-button repeatedly check that the FREEZE function can be
toggled on and off.
13.6 HFO FAIL
Select CPAP mode. Switch HFO to CONT mode. Set up an HFO pressure of 10 cmH
2
O at
3Hz. Short out A0736/03/JP1. Check that HFO pressure modulation is suppressed in less than
1 second and that the HFO FAIL audible and visual alarm is activated.
13.7 FAN FAIL
Short out A0736/03/JP3 and A0736/03/JP4 in turn. Check that FAN FAIL audible and visual
alarm is activated in each case.
13.8 Slow Rise Waveform
Switch to CMV mode. Select 30 BPM with 1 second INSP time. Set an inspiratory pressure of
30 cmH
2
O. Set HIGH alarm to 60 cmH
2
O, CYCLE FAIL alarm to 20 cmH
2
O, and LOW alarm
to -20 cmH
2
O. Select a display frame time of 2 seconds.
Observe the pressure wave. With the PRESSURE WAVE switch in the square position, the
pressure waveform rising edge should be fast (nearly vertical). With the PRESSURE WAVE
switch in the slow rise position, the rising edge should be tapered in appearance, with a time
constant of about ¼ second.
13.9 PTV Mode
1) With a full patient circuit connected, check operation of the PTV trigger system. By sim-
ulating a patient effort at the ET connector, using a 2ml syringe drawn out over a period
of ½ second, ensure reliable triggering at the maximum sensitivity setting. Repeat the
test using a 10ml syringe with the sensitivity control at its minimum setting
2) Check that the trigger back-up system works properly and that the back-up audible
beep and LED are activated when a back-up breath is initialized.