The often-used analogy is that voltage is to water pressure as current is to water flow. The voltmeter is like a pressure gauge on your water system and tells you the potential available to move electrons through the electrical system, just a pressure gauge that indicates the potential to move water through the system.
An ammeter is like a flow meter and indicates the rate electrons are moving through some point in the system, just like a flow meter tells the rate at which water is moving through the system.
Ammeters were once popular, probably because they're simple to interpret. "+" is good, "-" is bad. But they require either running a heavy gauge wire into the dashboard, or installing a remote shunt in the vehicle. Voltmeters are a bit trickier to interpret, since the difference between "good" and "bad" is only a volt or two. When charging systems were producing less that fifty amps, ammeters made sense. But as charging systems became more powerful, the need for current shunts made the voltmeter a better choice, since it only requires a single, light-gauge wire. Also, it's tricky to detect a slight discharge on a 100 amp ammeter, while a discharge state looks the same on a voltmeter regardless of charging system capacity.
Upload one or more videos to your post. Photo filesizes should be less than 300K and Videos, less than 2MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - The 8N and the Fox - by Zane Sherman. Dec. 13 1998, Renfroe, Alabama. Last niht I dreamed about the day that I plowed the field of about 10 acres over on what Jimmy and Dandy called the Ledbetter field. I was driving the 1948 8N Ford tractor that Jimmy bought in 48 new This was prebably in about 1951 and maybe even befor the house was built. This would have made me to be about16 years old and I drove the tractor for nothing and would have paid to drive it if I had had any money which I didn't, but neit
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.