Re: deflection plate malfunction
Ray Hicks (hicks@icrf.icnet.uk)
Mon, 18 Sep 1995 10:42:17 +0100 (BST)
Hi Visia,
Are there any signs of arcing (an ozone smell and pale blue light around
the plate/plate holder)? I occasionally had a similar problem when the
nozzle had become blocked and buffer had sprayed onto the plates. The
best fix for this is to switch off the stream AND THE PLATES, remove the
plate holder, dry off the plates and the pins that protrude at the back,
and dry the sockets and surrounding area in the machine. I found that
drying was made easier by spraying some propanol onto the plates to
displace water, be sure to allow all of the propanol to dry off before
you re-insert them.
By the way if this is the cause of your problem you'll find the O-rings
around the plate pins have perished in the ozone and will need to be
replaced.
Ray
On Thu, 14 Sep 1995, Visia Dragowska wrote:
> We are experiencing power failure in our left deflection plate on our BD
> FACStar+.
> It generally occurs after approximately 6 hrs of sorting. It takes between
> 10 minutes and 1 hour before the plates are functionning properly again,
> after we lose power. Replacing the deflection plate does not fix the
> problem, however, it has been difficult to pinpoint the source of the
> problem, since the plate always regains power on its own eventually. It
> also seems as though the left plate has a lower voltage, since the stream
> center control will not pull the stream as far left as it will to the right.
> The side streams do not seem to be affected.
> Has anyone any suggestions?
> Thanks in advance
>
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