5 microamp meter - 5 microamp d'Arsonval.jpg - meter box.jpg
On Thu, 19 Nov 2009 18:53:02 +0100, "Arie de Muynck"
wrote:
John Fields ...
Ian Jackson ...
Is that really a 5 microamp meter, or actually just a meter with a 5
microamp FSD scale?
It's real. :-)
And a real beauty it is.
What is the internal resistance,
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Can't find the spec but, measured here, about 6000 ohms.
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AKA how much uWatt does it need?
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Since P = IČR = 5e-6A * 6e3R = 3e-2W = 30mW for full-scale deflection.
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And how does that compare against 'normal' instruments?
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Dunno, but check out the Simpson, Tripplett, etc. websites to find out.
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I noticed that e.g. the same type of relay always need the same coil power
regardless the voltage.
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OK...
JF
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