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JOHN TIPTON
Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England
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 Posted: Fri May 01, 2015 2:45 am Post subject: Shunt size |
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Hi Guys
Do I need, for a 60amp alternator, 40amp ammeter, a 60amp or a 40amp Shunt
Regards
John
Sent from my iPad
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nuckolls.bob(at)aeroelect
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| Posted: Fri May 01, 2015 6:50 am Post subject: Shunt size |
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At 05:43 2015-05-01, you wrote:
Hi Guys
Do I need, for a 60amp alternator, 40amp ammeter, a 60amp or a 40amp Shunt
Regards
John
Do I assume correctly that it's a calibrated device
with 40A full scale? If the calibration is to be
meaningful, then you need a 40A shunt DESIGNED
to work with that ammeter. MOST shunted instruments
use 50mV shunts . . . but in recent years, products
designed for something other than 50mv have popped
up on the market.
The credible answer to your question needs
more information. What kind of instrument
do you have?
Bob . . .
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MNellis
Joined: 16 Aug 2008
Posts: 15
Location: Georgetown, TSX
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| Posted: Fri May 01, 2015 7:07 am Post subject: Shunt size |
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I've recently purchased some eBay instruments (V/A) with both 500a and 50a shunts that are 75mv. On May 1, 2015 9:52 AM, "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:[quote]--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>
At 05:43 2015-05-01, you wrote:
--> AeroElectric-List message posted by: John Tipton <jmtipton(at)btopenworld.com (jmtipton(at)btopenworld.com)>
Hi Guys
Do I need, for a 60amp alternator, 40amp ammeter, a 60amp or a 40amp Shunt
Regards
John
Do I assume correctly that it's a calibrated device
with 40A full scale? If the calibration is to be
meaningful, then you need a 40A shunt DESIGNED
to work with that ammeter. MOST shunted instruments
use 50mV shunts . . . but in recent years, products
designed for something other than 50mv have popped
up on the market.
The credible answer to your question needs
more information. What kind of instrument
do you have?
Bob . . .
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JOHN TIPTON
Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England
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| Posted: Fri May 01, 2015 7:44 am Post subject: Re: Shunt size |
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Hi Bob
Yes: a standard Vans 40-0-40 ammeter (steam gauge setup) so a 40 amp shunt - got it
John
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nuckolls.bob(at)aeroelect
Guest
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| Posted: Fri May 01, 2015 10:01 am Post subject: Shunt size |
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At 10:44 2015-05-01, you wrote:
| Quote: |
<jmtipton(at)btopenworld.com>
Hi Bob
Yes: a standard Vans 40-0-40 ammeter (steam gauge setup) so a 40 amp
shunt - got it
John
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Make sure you get the shunt from Van's . . .
I think the last time I put my hands on Van's
ammeter, it was set up for a 70 mV shunt.
Bob . . .
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nuckolls.bob(at)aeroelect
Guest
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| Posted: Fri May 01, 2015 10:03 am Post subject: Shunt size |
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At 10:06 2015-05-01, you wrote:
| Quote: | I've recently purchased some eBay instruments (V/A) with both 500a
and 50a shunts that are 75mv.
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Yeah, I've run across some Chinese products that
were wrapped around 75mv shunts. I think Van's
ammeter is a +/- 75mv instrument.
Bob . . .
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