RE: Grounded (earthed) power supply? (slightly OT)

[Keith Doxey <ukha@xxxxxxx>]

Just connect a wire from the earth pin of a 13A plug t  the 0V or -ve side
of the power supply you are using. That will make it grounded.

Keith

-----Original Message-----
From: Jonathan Bradshaw [mailto:jonathan@xxxxxxx]
Sent: 30 July 2001 16:09
To: ukha_d@xxxxxxx
Subject: [ukha_d] Grounded (earthed) power supply? (slightly OT)


Its slightly off-topic (weather automation?) but I'm betting this group
has got some ideas for me!

I'm looking for a 12V power supply (currently using a plug-top 12V
switched 1 amp) that is "grounded" through the t  the equipment.
The
weather station I have (Peet Bros Ultimeter 2000) requires an earthed
power supply in order t  leak the static build up from the anemometer.

Unfortunately, the one I got from Maplins is not and right now after
about 5 minutes, the protection device in the junction box activates and
the display zero's out. If I remove the anemometer for 5-10 minutes I
can then plug it back in and get readings for a short while.

Nowhere can I find a mains transformer that appears t  do what I need. I
was given the suggestion by the American company t  run a wire from the
negative side of the 12V output directly t  earth but I'm not sure if
this is okay for a switched power supply or even if it should be done in
the UK.

So, any advise would be appreciated!

Jonathan





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