22
Overview
DIAGNOSTIC DISC OR SHEET
The Diagnostic Disc and Sheet are included with LimbLogic
Systems. These are used to evaluate the internal seal of the
pump. The Disc is used with the distal mounted design, and
the Sheet is used with the side mounted design. Do not use the
sealing Disc with a Side Mounted pump. The Disc and Sheet are
used to evaluate the pump’s seal integrity as follows:
1.
If you are using a new disc with a Distal Mount pump,
remove the protective tape from the Diagnostic Disc.
2. Place the Sealing Gasket in the recess around the inlet to
the pump.
3. Place the Disc (if using a Distal Mount pump) or the Sheet
(if using a Side Mount pump) over the inlet and the gasket.
4. Gently bolt the pump back onto the socket to ensure a
tight seal. Note: If evaluating a Side Mount pump and a
sealing plate, make sure that the plate is aligned between
the mounting bolts before gently bolting on the pump.
5. Note the Vacuum Pump’s vacuum level and range settings
and then set the vacuum level to 20 and the range to 4.
6. Start the pump and watch the display on the fob:
• If the Vacuum Pump cycles more than once every 20
seconds, the Vacuum Pump has a leak.*
• If the vacuum level holds steady, the pump is functioning
correctly.
7.
Remove the Diagnostic Disc or Sheet and attach the pump
and gasket for normal operation of the system.
8. Return the Vacuum Pump to its original vacuum and range
settings.
*All pneumatic systems leak. The volume of air trapped behind the
Diagnostic Disc or Sheet is typically 10 to 20 times smaller that the
volume of a typical socket. This results in a very sensitive measure of
leakage. A Vacuum Pump that passes this test will only use a small
percentage of its battery life to accommodate Vacuum Pump leakage.
Diagnostic Disc
Sealing Gasket
LimbLogic
Vacuum Pump
Capscrews
OPERATION AT HIGH ALTITUDE OR LOW PRESSURE
LimbLogic uses air pressure to hold on a prosthesis. There is
less air pressure at higher altitudes. LimbLogic will function
normally at up to 1700 meters (5500 feet) of altitude. However,
the pressure available to hold on your prosthesis may be lower
if you are over 1700 meters (5500 feet). If this happens, your
pump will indicate that it has a leak and you should lower your
vacuum setting. A setting of 17 can usually be used for altitudes
of up to 3000 meters (10000 feet).
Diagnostic
Sheet
Sealing
Gasket
Side Mount
Vacuum
Pump
