Oscilloscope (was SW5548 interference) [RE-wrenches]

[Joel Davidson]

Wrenches,
What rugged, portable, reasonably priced oscilloscope (brand and model) do
you use and recommend? Thank you in advance.
Joel Davidson

----- Original Message ----- 
From: "sunwise" <sunwise at cheqnet.net>
To: <RE-wrenches at topica.com>
Sent: Thursday, February 26, 2004 10:33 AM
Subject: RE: SW5548 interference again [RE-wrenches]


> Greetings Keith,
>
> Have you scoped the outputs of the inverters.  While such problems are
> occasionally reported with the SWs, you also may have lost a stage in
> one of the units which results in a much more square wave output.  I had
> a similar scenario and it turned out to be nothing more than the fact
> that during assembly, someone had not adequately tightened a connection
> to one of the three transformers and it failed.  If one of the SW's has
> a similar problem, it will also not deliver as high a charging current
> to the batteries.
>
> As mentioned in the past, you can also do a rough test for this with a
> digital meter that is not true RMS.  If it is sine wave, it should read
> about 120vac, if it is modified square wave, it will read less on the
> non RMS meter, perhaps as low as 95 volts.
>
> Kurt Nelson
>
> -----Original Message-----
> From: Keith Cronin [mailto:sales at islandenergy.net]
> Sent: Thursday, February 26, 2004 11:49 AM
> To: RE-wrenches at topica.com
> Subject: SW5548 interference again [RE-wrenches]
>
>
> Hello Gang
>
> I am again having issues with a dual SW5548 system on a mega mansion
> with all of these sophisticated dimmers/speed controls for fans as well
> as the Leviton brand MD101 dimmers for the low voltage MR16 lamps
> throughout the home. I have tried GE 4uf 370 VAC run capacitors to clean
> the ripple, but it seems when the power goes out, and the "19" ceiling
> fans are on as well as the dimmers for the lighting, the lights in some
> areas start to do the disco strobe and some of the fans start to hum.
>
> Anyone know if it is due to the 34-52 steps in the SW and because it
> gets worse on the steps as the machines get loaded down?
>
>
>
> Any suggestions out their? Anyone know of any line filter/conditioners?
>
>
>
> I know I could probably switch out the units to some outback's, but the
> client isn't ready for that yet!
>
>
>
> thanks
>
>
>
> Keith Cronin
>
> President
>
> Island Energy Solutions Inc
>
> 318A Kuulei Rd
>
> Kailua, HI 96734
>
> 808-262-3268 Tel
>
> 808-263-0338 Fax
>
> keith at islandenergy.net
>
> www.islandenergy.net
>
>
>
>
>
>  <http://www.islandenergy.net>
>
>
>
>
>
>
>
>
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>
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>
> [Non-text portions of this message have been removed]
>
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