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Why Do We Use 4-20mA Instead Of 0 20mA Current Signal?

January 24, 2024 by Leah Jackson

Why Do We Use 4-20mA Instead Of 0 20mA Current Signal? The 4 mA is used as “range zero”. If the range zero were truly zero mA, then there would be no current, and therefore no power to drive the field instrument. Field instrument would require 3 or 4 wire devices. Additional wiring costs come

Can An Oscilloscope Be Used As A Voltmeter?

January 24, 2024 by Jasmine Sibley

Can An Oscilloscope Be Used As A Voltmeter? The cathode ray oscilloscope (CRO) is a powerful tool. It acts as a voltmeter. Why do we use an oscilloscope instead of a voltmeter? One of the advantages of an oscilloscope over multimeter is that oscilloscopes also have the ability to visually display complex signals (the “picture”