HOW THE HELL DOES A "DC CLAMP-METER WORK??

"DC Clamp-Meters" - Based on the class of "Machine" in "2nd Stage" University of Salahaddin -College of Engineering - Electrical Engineering Dept, Erbil-Kurdistan,Iraq. 

 بارحة صديقي سأل سؤال دوخني هههه فطريق الرجعة كلة افكر بي فعلا يعني شون يشتغل؟ قريت عنة للمدة ساعة ولكيت الجواب الحمد لله والي ساعدني ع فهم الموضوع درس الماشين بالمرحلة الثانية "هندسة الكهرباء" ويا استاذ اري جنا ناخذة ^_^ طلع المبدأ مالتة بسيييييييط جداً هههههه

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Ordinary clamp-meters used to measure "AC currents" work on the principle of electromagnetic induction caused by the alternating current flowing in the conductor. However, in DC conductors, the current flows in a fixed polarity. Consequently, the magnetic field around the conductor is fixed and does not change. Hence, a conventional clamp meter will register no reading.

**THE QUESTION IS HOW THE HELL DOES A "DC CLAMP-METER WORK" ??

DC clamp-meter works on the principle of the "Hall Effect". The Hall Effect, named after "Edwin Hall" who discovered it 1879, states that when a conductor carrying current is placed in a magnetic field, a potential is induced across the conductor. ^_^

**The potential induced around the conductor is caused as the charge carriers, electrons or holes, experience a force known as the "Lorentz force" and are pushed to the sides of the conductor. (Left Hand Rule) ;)

These Clamp-Meters has a sensor known as the "Hall element". The Hall element is subjected to the magnetic field caused by the flow of "DC current" to be measured. This causes a small voltage across the Hall element as explained above and this voltage is "amplified" and measured using "Op-Amps". (Y)

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2015 - 4 - 11 / 1:32PM

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