If you’ve never used a voltmeter to test electrical circuits on 12-volt farm equipment, cars or trucks, but wanted to learn, here’s how:
Voltmeters cost from $15 to $300. $50 will buy an economy-grade unit adequate to test for 12 volts on farm equipment. If you eventually graduate to testing sophisticated electronic circuits related to computerized systems, you’ll need to upgrade to a more expensive voltmeter with at least 10 million ohms of internal resistance to protect those sensitive circuits.
Read the full article on Agweb.com
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