Otto Bock Harmony P3, Technical Information

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4 Tips and tricks
4.1 Checking the system
This section gives a methodical troubleshooting procedure for when the vacuum system leaks.
1
2
3
To check the system for leaks, the prosthesis is divided
into areas.
•
Area 1:
Prosthetic socket and sealing sleeve
•
Area 2:
Socket connector and connection to the
vacuum pump
•
Area 3:
Vacuum pump (valves or functional ring)
Seal the outlet opening on the inside of the prosthetic socket with a small piece of paper and air-tight adhesive
tape (e.g. PVC tape).
•
Activate the vacuum pump until vacuum of 500 hPa to 850 hPa is reached.
• Check whether the vacuum is maintained.
The fault is in area 1.
•
Check the prosthetic socket and sealing sleeve for
leaks and fix the fault.
The fault is in area 2 or 3.
•
Connect the manometer directly to the suction con­
nection of the vacuum pump.
• Activate the vacuum pump until vacuum of
500 hPa
to
850 hPa
is reached.
• Check whether the vacuum is maintained.
The fault is in area 2.
•
Place the manometer with a T-piece between the
socket connector and the vacuum pump.
• Seal the hole on the inside of the prosthetic socket
with a piece of air-tight adhesive tape. This is how
the hose connection and the socket connection are
checked.
• Activate the vacuum pump until vacuum of
500 hPa
to
850 hPa
is reached.
• Check whether the vacuum is maintained.
• If the vacuum is maintained, reseal the socket con­
nector with adhesive. Then recheck the system.
The fault is in area 3.
•
Replace the valves of the vacuum pump.
• Check again whether the vacuum is maintained.
The fault has been fixed. The functional ring is defective.
•
Replace the functional ring.
24 | Ottobock
Tips and tricks
Harmony System