Something is strange. The ammeter and E-meter should agree within a few percent. If it were my Sparrow I'd find the problem and repair it. There's something wrong with the shunt, the meter or the wiring connections.
A +_150 ammeter is strange without regen and also because the current probably exceeds 150 amps. It seems unlikely that the controller has had its battery current limit set to under 150 amps. Such a low current limit would serious cramp performance at medium speeds. What's the maximum current that you've seen on the E-meter? I think you said something in an earlier message about 200 amps. If your controller is indeed set for a low battery current limit, try raising the limit to about 500 amps. You'll be very pleased with the improved performance. Tom Shay ----- Original Message ----- From: "John Lussmyer" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, October 09, 2002 6:33 PM Subject: Re: Sparrow Ammeter > At 06:17 PM 10/9/2002 -0700, Thomas Shay stated: > >The Corbin ammeter might be inaccurate but not > >because the current is pulsating. It should be > >possible to compare readings of current indicated > >by the ammeter and by the E-meter. I'd be > >surprised if the difference were more than a few > >percent. > > Then you would be surprised. Not only is my Ammeter a +- 150A model. > (which is kind of silly without regen), but it usually reads around 60-70% > of what the EMeter is reading. > > -- > John G. Lussmyer mailto:[EMAIL PROTECTED] > Dragons soar and Tigers prowl while I dream.... > http://www.CasaDelGato.Com > >
