Re: Watt Meter

To: tesla-at-pupman-dot-com
Subject: Re: Watt Meter
From: "R.E.Burnett" <R.E.Burnett-at-newcastle.ac.uk> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Tue, 29 Jun 1999 18:31:42 -0600
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme



> Original Poster: "Vivian Watts" <V.C.Watts-at-btinternet-dot-com> 
> 
> Hi All,
>     Being interested in the difference between the VA rating and the rms.
> power taken by my coil I managed to purchase a Watt meter at a local Amateur
> Radio Rally.

A very lucky find,  considering all the discussions about power factor and
sync gaps recently !

>  It is rated for A.C and D.C. but I'm not sure it is suitable
> for giving the true power on reactive loads and was wondering if anyone
> knew.  It is a Weston Model 310 made in Newark NJ USA dated 1941.  It is
> referred to as a electrodynamometer wattmeter.  Frequency range to 133Hz.
> 
> regards
> 
> Viv Watts (UK)


I think this type uses a heated wire so it should be good for a wide range
of power factors and waveforms.  Try checking it with a known resistive
load,  and then with a reactive load like a shorted neon or PFC cap.

Have you done any more work with the sync gap,  and simulations recently ?
Let me know if the real life measurements match the sims !

						- Richie

						- In sunny Newcastle.