Monitoring The Elevated Vacuum Environment - Otto HarmonyP3 4R147 Instrucciones De Uso

6. Slide the Functional Ring over the Shaft (Fig. 7, Step 4).
7. Reassemble the pump (Fig. 7, Step 5&6).
8. Secure the Retaining Screw with 636K13 Loctite® 241 and tighten it clockwise with 7 Nm
(60 in-lbs).
9. Reassemble the tube adapter and foot
4.5.4 Fine tuning of pump stiffness
Rough setting of the pump's compression stiffness is provided by Functional Ring selection. Fine
adjustment of the compression stiffness can be achieved by adding or removing washers (Fig. 6,
Item 11).
1. Loosen the Retaining Screw on the distal end of the pump (Fig. 5, item 10).
2. The pump is shipped with 2 washers on the Retaining Screw. Do not use more than two wash-
ers. One or both washers may be removed. A small o-ring is used to keep the washers on the
screw. The o-ring has no other function.
a) Removing a washers increases the preload on the Functional Ring, thereby reducing the
vertical displacement (and the extension of the pump during the swing phase). Additional
effect: slight decrease in maximum vacuum achieved.
b) Adding washers reduces the preload on the Functional Ring, thereby increasing the vertical
displacement (and the extension of the pump during swing phase). Additional effect: slight
increase in maximum vacuum achieved.
3. Test the achieved vacuum once the desired shock absorption has been reached.

4.6 Monitoring the elevated vacuum environment

To verify that the Harmony System maintains an elevated vacuum environment, it is necessary to
temporarily install the Vacuum Gauge 755Z37 (available separately from Ottobock).
1. To do this, remove the vacuum line from the Harmony P3 Pump's intake valve.
2. Next, attach the vacuum line of the Vacuum Gauge (short side) to the pump's Intake Valve
and connect the loosely hanging Socket Connector to the open barb on the Vacuum Gauge.
3. While the patient is standing and wearing the properly fitting Harmony System, cycle the
Harmony P3 Pump to generate a vacuum between 508-847 mbar (15 – 25 inHg).
4. Stop cycling the pump. If the vacuum is maintained, the system is functioning correctly. If vacuum
loss does occur, it will be necessary to check the system (see Section 4.6.1).
4.6.1 Troubleshooting the system if vacuum loss occurs
To determine if the vacuum loss exists in Zone 1, 2 or 3 (Fig. 11) install the gauge as described
in section 4.6. Then proceed as follows:
18 | Ottobock
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