[RE-wrenches] Oscilloscope

[Phil Undercuffler]

Conrad,

This might sound really stupid, but double check to make sure you have AC
power to the inverter input terminals. I'm working from memory here, but I
think I remember Brian Farhi saying that the Fronius inverter first looked
for frequency before voltage, and no AC present will throw a frequency out
of spec error (zero is definitely out of range!).

However, if you need to get a scope you might want to consider getting one
of the USB scopes that are now available, especially if you tend to carry a
laptop with you on the jobsite anyway.  I picked up a PicoScope a while ago,
and have been pretty happy with the value for the buck.
http://www.picotech.com/oscilloscope-specifications.html.  It's also really
handy in that it's small and packs up tight in a Pelican case with all my
meters.

Phil Undercuffler
Conergy


---------- Forwarded message ----------
From: "Conrad Geyser" <conradg at cape.com>
To: "'RE-wrenches'" <re-wrenches at lists.re-wrenches.org>
Date: Thu, 20 Aug 2009 07:54:04 -0400
Subject: [RE-wrenches] Oscilloscope
Esteemed Wrenches,

We haven't talked oscilloscopes since 2007.  We have a Nantucket Fronius
inverter that is telling us there is an AC frequency problem.  It seems
feasible that there is a frequency issue way out there and that we better
check that.

Any reviews on the Velleman handheld (or any other)oscilloscope?

http://www.kitsusa.net/phpstore/html/VELLEMAN-HPS10SE---PERSONAL-SCOPE-10MSs
---SPECIAL-EDITION-1485.html

thanks,

Conrad
Cotuit Solar
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