Volt / Ammeter

How is a shunt determined for a digital volt meter to determine amp? Can a
voltmeter that is using the measured voltage for its own power be set up on
a shunt to measure amps?

Charlie

I have been making shunts for years using a box of paper clips. I measured
the resistance of the full clip as .025 ohms, so part of a clip is less
resistance in a linear relationship. Larger paper clips have less
resistance. Depending upon the current drawn and the sensitivity of the
meter used, you may need to consider heat dissipation and of course consider
the insulation. I solder taps and they work fine.

Far easier than using so many feet of wire.

Colin

Please, either change the subject title or quit this thread...

You know how you can be in a room filled with people all talking at once
but you'll instantly hear when someone mentions your name?? Well, I'm
getting tired of seeing my name posted every day on RAH...

How about changing the name of the thread to "ammeter"? At least, with
the lower case it isn't so obvious to me.

BTW, if you can believe it... I retired from the Meter Department of a
large public Electric Utility as the Crewchief for all
Commercial/Industrial Metering for our very large city.... I've had
enough references to my name and what I did to last several lifetimes....

John Ammeter

COLIN LAMB wrote:
I have been making shunts for years using a box of paper clips. I measured
the resistance of the full clip as .025 ohms, so part of a clip is less
resistance in a linear relationship. Larger paper clips have less
resistance. Depending upon the current drawn and the sensitivity of the
meter used, you may need to consider heat dissipation and of course consider
the insulation. I solder taps and they work fine.

Far easier than using so many feet of wire.

Colin

"John Ammeter" wrote

Please, either change the subject title or quit this thread...

So you have changed your name at some time, and wanted to keep it, like some
girls that get married? You went from Volt to Ammeter? You could have just
dropped the " / " from the name change, so it didn't look like
"Volt/Ammeter." That really is a silly name, I think.

Could you not have gone to something a little further away from the
electrical world for the new name, like aardvark, or something?

You know, my old computer that I used when I first started reading this
group had terrible resolution. For a while, I thought you name was
ant-eater, or something.

Really, you have to be less paranoid. Just go by Ammeter, from now on, and
drop the Volt. That way, you won't think that everyone is out to get you.

They really are, though. g

Bwwaaahhaahaahaa!!!
--
Jim in NC

I used to be known as "amprobe".... "probe" to my friends...

Probe


Morgans wrote:
"John Ammeter" wrote


Please, either change the subject title or quit this thread...


So you have changed your name at some time, and wanted to keep it, like some
girls that get married? You went from Volt to Ammeter? You could have just
dropped the " / " from the name change, so it didn't look like
"Volt/Ammeter." That really is a silly name, I think.

Could you not have gone to something a little further away from the
electrical world for the new name, like aardvark, or something?

You know, my old computer that I used when I first started reading this
group had terrible resolution. For a while, I thought you name was
ant-eater, or something.

Really, you have to be less paranoid. Just go by Ammeter, from now on, and
drop the Volt. That way, you won't think that everyone is out to get you.

They really are, though. g

Bwwaaahhaahaahaa!!!

"John Ammeter" wrote in message
news:5oidncI8B55FEmvenZ2dnUVZ_vidnZ2d@cablespeedwa .com...
I used to be known as "amprobe".... "probe" to my friends...

Probe

That would be milli amp probe, I would think! g

Jim Ducking and Running in NC

I got a charge out of your reply. You must have fun when the FAA does a
ramp check to see if you are current.

If we are talking about volt/amps with direct current, we could simply
replace the heading with watts and be done with it.

Colin

("COLIN LAMB" wrote)
If we are talking about volt/amps with direct current, we could simply
replace the heading with watts and be done with it.


http://www.geocities.com/thereaganyears/environment.htm
James Watt... :-)


Montblack, a woman, two Jews and a cripple

Montblack wrote:
("COLIN LAMB" wrote)
If we are talking about volt/amps with direct current, we could simply
replace the heading with watts and be done with it.


http://www.geocities.com/thereaganyears/environment.htm
James Watt... :-)


Montblack, a woman, two Jews and a cripple

Thank you Secretary Watt.

Dan, U.S. Air Force, retired

John Ammeter wrote:
Please, either change the subject title or quit this thread...

You know how you can be in a room filled with people all talking at once
but you'll instantly hear when someone mentions your name?? Well, I'm
getting tired of seeing my name posted every day on RAH...

How about changing the name of the thread to "ammeter"? At least, with
the lower case it isn't so obvious to me.

BTW, if you can believe it... I retired from the Meter Department of a
large public Electric Utility as the Crewchief for all
Commercial/Industrial Metering for our very large city.... I've had
enough references to my name and what I did to last several lifetimes....

John Ammeter

COLIN LAMB wrote:

I have been making shunts for years using a box of paper clips. I
measured the resistance of the full clip as .025 ohms, so part of a
clip is less resistance in a linear relationship. Larger paper clips
have less resistance. Depending upon the current drawn and the
sensitivity of the meter used, you may need to consider heat
dissipation and of course consider the insulation. I solder taps and
they work fine.

Far easier than using so many feet of wire.

Colin

John, you have nothing on my grade school shop teacher. His name was
....drum roll...Woody Rafters. Swear to God! And speaking of which, he
was the local Episcopal minister's son.

Rip