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Alf #75784 02/11/20 6:59 PM
Joined: Feb 2004
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Super Hero
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Super Hero
Joined: Feb 2004
Posts: 14,334
Likes: 22
Looking closely at Figure 1 in the CME FSN (cited above) ... if there has to be a "re-design", I would suggest that the battery contact leaf spring connectors would be a good place to start. To be specific ... their shape.

Spring-loaded plunger connectors ("buffers") would be altogether better, of course. Or even six AA batteries ... or maybe a "quality" solution using components from companies such as Keystone.

With reference to Figure 1, if for some reason the battery moves up (towards you, the viewer) - maybe because it does not fit snugly in its compartment - or is even being pushed up by a crumbled sticky pad (!) - the battery contacts will tend to disengage from the leaf connectors.

By the way - in answer to some of my own questions - I note that the FSN mentions that the real problem is that the pump can unexpectedly power down ... "without any warnings". frown

Don't forget that the PP-3 was designed to be used with the snap-on (off) connector ... not simply pushed up against leaf spring (or any other) contacts.


If you don't inspect ... don't expect.
Joined: Jan 2005
Posts: 69
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Joined: Jan 2005
Posts: 69
Thanks Geoff and Alf - sorry for the delay replying - I'm sure we all have the same Covid related issues at the moment.

Yes the Duracell Ultra is now the recommended battery.

I too have described the foam pad as a bodge job Alf, not what we would and should expect of a Medical Device, very disappointing.

It's ok reminding us how the battery should be inserted but in the real world where we have a patient involved and pressures elsewhere - the device needs to be fit for that purpose in that situation with those pressures.

Onwards and upwards
Mick


I was looking back to see if she was looking back to see if I was looking back at her!
Joined: Feb 2004
Posts: 14,334
Likes: 22
Super Hero
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Super Hero
Joined: Feb 2004
Posts: 14,334
Likes: 22
Why not bin the gash foam pad ... and simply make suitable "adjustments" as mentioned by Dave in Oz at #75765?


If you don't inspect ... don't expect.
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