Re: Ammeter internal current draw

On Thu, 02 Mar 2006 11:23:19 -0500, Ken C <cprstn54@xxxxxxxxxxxxxx>
wrote:

Sounds like a strange question,I know.

The questions concerns digital ammeters like:
http://cgi.ebay.com/DC-0-30A-3-1-2-Digital-LED-Amp-Current-meter-Shunt_W0QQitemZ7595502001QQcategoryZ25411QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Does anyone know how much current typically flows in the leads from
the shunt to this kind of digital meter?

I am trying to determine how far I can put the meter from the shunt
without losing accuracy.

---
This is really a digital millivoltmeter reading the drop across the
shunt and, typically, the input impedance to these voltmeters is
about 10 megohms, so the current in the leads (and, thus, the drop
across them) will be negligible compared to what's going through the
shunt.


--
John Fields
Professional Circuit Designer
.

Relevant Pages

  • Re: Ammeter internal current draw
    ... shunt and, typically, the input impedance to these voltmeters is ... about 10 megohms, so the current in the leads (and, thus, the drop ... but not as a fraction of the voltage drop across the ... leads or the typical voltage drop across this kind of shunt. ...
    (sci.electronics.basics)
  • Re: Ammeter internal current draw
    ... shunt and, typically, the input impedance to these voltmeters is ... about 10 megohms, so the current in the leads (and, thus, the drop ... and if your meter impedance is 10 megohms, ... AWG copper wire. ...
    (sci.electronics.basics)
  • Ammeter internal current draw
    ... The questions concerns digital ammeters like: ... Does anyone know how much current typically flows in the leads from ... the shunt to this kind of digital meter? ... I am trying to determine how far I can put the meter from the shunt ...
    (sci.electronics.basics)
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