Graseby 3000/500, Manual

Page: 108 / 231

G r a s e b y M e d i c a l L t d .
7 — 1 2
I s s u e A ( A p r i l 2 0 0 2 )
3 0 0 0 / 3 1 0 0 a n d 5 0 0 / 5 0 5 S e r v i c e M a n u a l
V o l u m e t r i c I n f u s i o n P u m p s
7
10. Check occlusion alarm
Refer to Figure 8.14 and section ‘Occlusion Alarm Adjustment’ (page
8-15) during the following procedures.
Note: For pumps with software Version 0.64 or later, an occlusion filtering
process in the Medium and High settings is included. This filtering
process causes the pump to pause for up to 10 seconds when an
occlusion is detected. There is no filtering process for the Low occlusion
setting.
Turn the pump on. Reload the fluid filled cassette (still connected to
the compressed air source). Place the lower tubing at the same level
as the base of the pump.
Program in a volume to be infused of 888.8 ml and a program a rate of
99.9 mL/h.
Press the Occlusion Alarm Setting key until the Message Display
shows:
Press Run and slowly increase the back pressure at a rate of 0.1 psi/3
seconds.
Verify that the following display occurs at 2.0 psi +1.0/-0.5 psi):
Press Silence and lower the back pressure below 1.5 psi.
Press Occlusion Alarm Setting until the Message Display shows:
Verify that the following display appears:
and that the pump alarms at 5 psi ± 1.0 psi.
On pumps with occlusion filtering process (see Note above), verify
that when the pressure reaches 5 psi ± 1.0 psi the motor stops, Run
remains lit and the pumping indicator stops, indicating that the
occlusion filtering has begun. Verify that the audible and visual
alarms activate within approximately 10 seconds following the start
of the filtering process.
Press Silence and lower the back pressure below 1.5 psi.
Press Occlusion Alarm Setting until the Message Display shows: