Grid fluctuations [RE-wrenches]

[Larry Crutcher]

My trusty Fluke 123 Scopemeter has worked great for this very purpose. It has a dual input Trendplot (log) recording the high, low and average voltage. You can sample both legs of a split phase for several days. It is a great all around meter with dual trace O-scope. A little pricy but hey, it's a Fluke! (I still use fluke meters that I bought over 25 years ago)

see this cool demo: http://us.fluke.com/VirtualDemos/120_demo.swf

Larry
  ----- Original Message ----- 
  From: Drake Chamberlin 
  To: RE-wrenches at topica.com 
  Sent: Thursday, June 28, 2007 4:12 PM
  Subject: Grid fluctuations [RE-wrenches]



  Hi Wrenches,

  We have a Sunny Boy that keeps shutting down for periods, then 
  restarting.  We have measured grid voltage of 137 VAC per phase, and 
  think that is the problem.  The utility company is claiming that the 
  grid is fine.

  Does anyone know where we can get a recording voltmeter to put on the 
  grid.  There is no Internet access at the location.  We just want to 
  be able to record the voltage over time.  We suspect that their may 
  be short term spikes, which we would like to catch.

  Thanks,

  Drake 


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