Oscilloscope (was SW5548 interference) [RE-wrenches]

[Dean T. Newberry]

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Good used scopes and lots of other reusable electronics available at: H 
S C Electronic Supply, (916) 338-2545, 4837 Amber Ln, Sacramento, CA 95841

Joel Davidson wrote:

>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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>>[Non-text portions of this message have been removed]
>>
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>>    
>>
>
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-- 

 
* Cooperative Community Energy* 	*Dean T. Newberry*

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