Posted by wmbjk on June 6, 2006, 1:50 pm
Most meters don't have a DC amp clamp. But if you're going to be in
the biz, you need one. The Fluke 337 is one example
http://www.fluke.com/download/electricalpower/1629613_.pdf There are
plenty of others for less money.
You'll also want an AC Watt-hour meter such as a Kill a Watt or
I recommend the Kill a Watt, because it's cheap enough that you can
afford to have several, which will save time if you're auditing (as
opposed to estimating) someone's use. Leave one behind for the
customer when you're done. Get some short AC extension cords to make
the Kill a Watts more convenient to hookup and use.
None of the meters above can keep track of battery state of charge on
an operating system though. For that you need something like this
Consider it a mandatory on every system.
Posted by Lectron_Nuis on June 6, 2006, 7:55 pm
And some years ago National Panasonic were marketing a entry
level range that was surprisingly good quality. No longer
available in Australia they may be a choice in your area of
posted in response
Having difficulty learning about Binary posts?
Subscribe to alt.binaries.vj.tester - today.
Posted by Bill Kaszeta / Photovoltaic Re on June 7, 2006, 1:54 am
Check out the AC/DC digital clamp-on ammeter/voltmeter at Sears, about $0.
Once you have used a DC clamp-on to troubleshoot a PV system, you
will not give it up. There also have a $0 digital IR temperature probe
with laser pointer that is a great buy.
Photovoltaic Resources Int'l
Tempe Arizona USA
Posted by Jeff on June 7, 2006, 3:18 am
Bill Kaszeta / Photovoltaic Resources wrote:
How do they make those work? I would image they can chop the secondary,
or use a hall effect sensor.
That's a great price. What kind of resolution does it have?
Posted by DJ on June 7, 2006, 1:50 pm
Edward Lomax wrote:
Always the trick, yep ;-).
I have a fluke I use, yes. It's working well.
Go fluke, then. And keep in mind the ranges you will be working with
when you choose it. Max AC voltage and amperage, max DC voltage and
amperage. Alot of clamp-ons won't do both AC and DC amperage in the
And I also keep a few of those cheap (5-10$) units around, especially
for tin roof work. If all I need to see is if the strings are the right
polarity and voltage, I'd rather accidentally drop a 10$ meter to the
ground than my fluke ;-).
I run an alternative energy installation company myself, and as a word
of advice, don't go too nuts at the store ;-). Do the pawn shop / eBay
route as well. You will easily end up with 10 000$ worth of gear by the
time your company is in full swing. Getting it for cheaper tha that is
always a good idea. Be careful to make sure you have money left to pay
your suppliers ;-).
Google doesn't seem to want to let me ;-).