SLE SLE2000 HFO, Service Manual, Page: 71 / 84

SLE2000 HFO Service Manual
Doc No. SM/0001: Issue 7.0
Page 71 of 84
7. O
PERATIONAL
V
ERIFICATION
7.1 B
ASIC
O
PERATION
With mains power connected, switch unit on and observe that:
1) All audible alarms sound for approximately 2 seconds.
2) All warning LED’s except ‘BLOCK’ and ‘HFO FAIL’ are activated for approximately 2 seconds
3) All 7 Segment displays increment from 0 to 9 (Check all segments are operative)
4) LCD firmware initialises & displays SLE logo.
5) With mode switch set successively in CPAP, CMV, PTV, and SIMV, disconnect the mains supply
& confirm that the Mains Failure audible alarm is activated in each position. On completion re-
apply mains power.
6) By shorting together both pins of XL1 on the A0702/02 PCB, check operation of the processor
watchdog timer by observing a processor reset function together with audible and visual alarms.
7) By shorting together both pins of XTL1 on the JO 736 PCB, check operation of the processor
watchdog timer by noting audible & visual alarms. Select CPAP mode, HFO OFF.
8) Check operation of MANUAL BREATH push-button, and by adjustment of INSP TIME control
confirm that a range of inspiratory times from 0.1 sec. to 3.0 sec. shall be obtained, and that this
adjustment can be monitored on the INSP TIME display.
9) Check that no mandatory breaths are present other than those produced by the MANUAL
BREATH push-button.
10) Switch HFO successively to EXP, INSP, and CONT.modes. Ensure that manual breaths are not
delivered in any HFO modes but OFF.
11) Set pressure display switch to MIN position. By selecting a range of inspiratory pressures from 0
cmH
2
O to 60 cm H
2
O in 10 cmH
2
O steps, ensure accuracy of digitally displayed pressure to less
than 1 cmH
2
O error against an RT 200 reference.
12) By adjusting HIGH alarm setting to displayed inspiratory pressure, and operating MANUAL
BREATH push-button, observe that inspiratory plateau on LCD pressure display and bargraph
display correspond with alarm line and LED Segment, respectively.
13) Check that HIGH audible and visual alarm operates at pressures above or at HIGH alarm setting,
and fresh gas solenoid is de-energised at pressures greater than 2cm above HIGH alarm setting.