Watt Meter,

[ronlock at comcast.net]

Or if you want data quick and easy, the AstroFlight Whattmeter provides a direct readouts up to 100 amps, 60volts, 6,000 watts.  Also shows the
amps put in during charge.  It does not have an internal battery, it needs at least 4 volts from the battery under test/charge.

Later, Ron Lockhart

-------------- Original message -------------- 

> 
> 
> On Jun 14, 2005, at 2:13 PM, Jim_Woodward at beaerospace.com wrote: 
> 
> 
> I'm wondering what the sources are for a good watt 
> meter (for Hacker C50 14 XL setup), and an inexpensive IR temp gun 
> are. 
> 
> 
> 
> Let's see: amps times volts equals watts for DC circuits. So, if you 
> know the source voltage (with a voltmeter) and the current (using an 
> ammeter), you can determine watts. I use a digital voltmeter and a 
> Sears Craftsman 82062 DC/AC clamp meter for the respective 
> measurements. I don't know what the upper limit is for the Sears 
> clamp meter, but I have used it to measure about 50 amps. It appears 
> to be very accurate (compared with sophisticated bench measurement 
> devices) and costs less than $49.95 (occasionally $39.95 on sale). 
> 
> 
> Ron Van Putte 
> 
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