Amp Guage

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.

Amp Guage

Postby twotone » Sun Mar 24, 2013 11:49 am

Is there anything special about an amp guage for a 6 volt pos ground system, or will any amp guage work?


Tom
Know Your Cub, And Your Cub Will Know You.

Tom
User avatar
twotone
501 Club
501 Club
 
Posts: 1024
Joined: Sat May 14, 2011 6:09 pm
Location: Versailles,Pa.
Zip Code: 15132
Tractors Owned: 53 F Cub
73 F Cub
53 Super A With Snow/Grader Blade
193 Plow With Colter And Jointer
144 Cultivators
22 Mower
Circle of Safety Award
Circle of Safety: Y

Re: Amp Guage

Postby Eugene » Sun Mar 24, 2013 12:16 pm

Short answer, generally no difference except the range with in which the gauge reads the amps. Some of the newer amp gauges are negative ground specific.

For a 6 volt system, a gauge reading a maximum of 20 amps would be satisfactory. A gauge with the ability of reading 60 or 120 amps would work in an electrical system capable of outputting 20 amps or less. However, the ability to get a near accurate reading from the gauge will be severely hindered.
I have an excuse. CRS.
Eugene
Team Cub Mentor
Team Cub Mentor
 
Posts: 12636
Joined: Fri Jul 02, 2004 9:52 pm
Location: Mo. Linn
Zip Code: 65051
Circle of Safety Award
Circle of Safety: Y

Re: Amp Guage

Postby twotone » Sun Mar 24, 2013 12:28 pm

Thanks Eugene. The "negative ground specific" rings a bell and that's why I asked the question.


Tom
Know Your Cub, And Your Cub Will Know You.

Tom
User avatar
twotone
501 Club
501 Club
 
Posts: 1024
Joined: Sat May 14, 2011 6:09 pm
Location: Versailles,Pa.
Zip Code: 15132
Tractors Owned: 53 F Cub
73 F Cub
53 Super A With Snow/Grader Blade
193 Plow With Colter And Jointer
144 Cultivators
22 Mower
Circle of Safety Award
Circle of Safety: Y

Re: Amp Guage

Postby clodhopper » Sun Mar 24, 2013 1:04 pm

I bought a generic 60 amp gauge recently at napa. Works fine. Its a little deeper than the original, so it makes space a little tighter behind an already tight dash, but it works. I cant really figure out how an amp gauge would be polarity specific....it simply reads the current through the current carrying conductor of the system. It is, in fact, part of the conductor. If it reads a discharge while charging, it would simply be a matter of reversing the leads on the gauge.
I'll be drinking that free bubble up, and eatin that rainbow stew.
http://www.builditnc.com
User avatar
clodhopper
501 Club
501 Club
 
Posts: 724
Joined: Sat May 07, 2011 8:20 pm
Zip Code: 27526
Tractors Owned: 1950 Cub Demo
1978 Cub Cadet 1650
cub 193 plow
cub 174 planter
cub sidedresser
cub 144 cultivator
cadet 50a deck
60A grader blade
Circle of Safety Award
Circle of Safety: Y

Re: Amp Guage

Postby Matt Kirsch » Mon Mar 25, 2013 9:33 am

There's nothing specific about the ground type on an ammeter. Ammeters are not grounded (for the ammeter function).

If your ammeter is lighted, it is, of course, grounded. But, the Amp-measuring part is not grounded.
Matt Kirsch
10+ Years
10+ Years
 
Posts: 3408
Joined: Tue Jun 08, 2004 3:04 pm
Location: Rochester, NY
Zip Code: 14559
Circle of Safety Award
Circle of Safety: Y

Re: Amp Guage

Postby Landreo » Mon Mar 25, 2013 1:50 pm

The basic ammeter I typically see is not polarity dependent. There are shunt meters which may be what Eugene is talking about. They are just a low ohm resistor and a voltmeter calibrated to read the voltage drop as current. They may be ground polarity dependent.
Landreo
5+ Years
5+ Years
 
Posts: 956
Joined: Tue Oct 19, 2004 7:10 am
Location: SC, Ridgeway
Zip Code: 29130
Tractors Owned: fcub
1 cyl fcub
154
Earthmaster
JD 40MT
JD 420 crawler-loader
D-2 Cat dozer
AC Model C
Cub Cadets
Red-E
Circle of Safety Award
Circle of Safety: Y

Re: Amp Guage

Postby twotone » Mon Mar 25, 2013 2:23 pm

Thank you all for your input. I'll check out some parts stores and see what they have, or order from Steiners.


Tom
Know Your Cub, And Your Cub Will Know You.

Tom
User avatar
twotone
501 Club
501 Club
 
Posts: 1024
Joined: Sat May 14, 2011 6:09 pm
Location: Versailles,Pa.
Zip Code: 15132
Tractors Owned: 53 F Cub
73 F Cub
53 Super A With Snow/Grader Blade
193 Plow With Colter And Jointer
144 Cultivators
22 Mower
Circle of Safety Award
Circle of Safety: Y

Re: Amp Guage

Postby John *.?-!.* cub owner » Mon Mar 25, 2013 6:21 pm

twotone wrote:Thanks Eugene. The "negative ground specific" rings a bell and that's why I asked the question. Tom
They are not too common, but there are a couple of companies that decided to get fancy. A normal ammeter has a shunt (high current resister of a known value) inside it connecting between the 2 terminals. The meter is actually a low voltage voltmeter that measures the voltage drop across the shunt, and the scale is marked to correspond to the amount of current flowing to cause that much voltage drop. There are some electronic ones that instead use a coil of wire wrapped around a conductor that is connected between the 2 terminals and an electronic circuit to measure the magnetic field induced, and the circuit drives the meter. those are negative ground specific, and the circuit will not work with positive ground.
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry
User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
 
Posts: 19588
Joined: Sun Feb 02, 2003 2:09 pm
Location: Mo, Potosi
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.

Re: Amp Guage

Postby twotone » Mon Mar 25, 2013 7:09 pm

Thanks for that explanation John. I checked a few parts stores today and all they had was volt guages. I'll order from Steiners as they have 2 amp guages that are listed for a Cub.


Tom
Know Your Cub, And Your Cub Will Know You.

Tom
User avatar
twotone
501 Club
501 Club
 
Posts: 1024
Joined: Sat May 14, 2011 6:09 pm
Location: Versailles,Pa.
Zip Code: 15132
Tractors Owned: 53 F Cub
73 F Cub
53 Super A With Snow/Grader Blade
193 Plow With Colter And Jointer
144 Cultivators
22 Mower
Circle of Safety Award
Circle of Safety: Y

Re: Amp Guage

Postby John *.?-!.* cub owner » Mon Mar 25, 2013 7:18 pm

Our local Carquest stocks these, note, the picture is not correct. They give a discount, price is around $20 to $25.
http://www.carquest.com/webapp/wcs/stor ... acesApp=0#
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry
User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
 
Posts: 19588
Joined: Sun Feb 02, 2003 2:09 pm
Location: Mo, Potosi
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.

Re: Amp Guage

Postby twotone » Mon Mar 25, 2013 7:31 pm

Thanks John. There's a Car Quest on the way to my wife's work.


Tom
Know Your Cub, And Your Cub Will Know You.

Tom
User avatar
twotone
501 Club
501 Club
 
Posts: 1024
Joined: Sat May 14, 2011 6:09 pm
Location: Versailles,Pa.
Zip Code: 15132
Tractors Owned: 53 F Cub
73 F Cub
53 Super A With Snow/Grader Blade
193 Plow With Colter And Jointer
144 Cultivators
22 Mower
Circle of Safety Award
Circle of Safety: Y


Return to Farmall Cub

Who is online

Users browsing this forum: Jason (IL) and 3 guests