----- Original Message ----- From: "Lee Hart" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, October 10, 2002 9:10 AM Subject: Re: Sparrow Ammeter
> Thomas Shay wrote: > > 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. > > I agree. The controller's input capacitors would filter out most of the > ripple, and no normal meter would be bothered by the ripple, anyway. > > Most likely, it is a $1.98 meter, and just plain inaccurate. My guess is that the meter and shunt aren't matched. A 150amp 50mv meter connected to a 250amp 50mv shunt is a combination that could produce the error John Lussmyer described. John shouldn't pay attention to Lee's guess or mine. Both of us are probably wrong. Tom Shay
