They can be tuned up or down on the range of the sizes. These openings range from a simple 17 mm to about 45 mm as well. The clamp size refers to the opening ends of the machine which are the actual holders using which you would hold on to the conductor. Also, safe devices come with a wide range of regulatory certifications and these assurances scream of safety. Higher overall voltage, current and resistance ratings the device has, the safer it is. This can be easily understood by looking at the build material and the build quality of the device. The first and foremost thing that you need to consider in a clamp meter is the level of safety it provides. Factors to Consider While Buying a Clamp Meter 1. The clamp in the clamp meter picks up the magnetic flux and measures it and then shows you the reading of the current on a screen. A clamp meter uses the principle of the current transformer. ![]() Owing to the dangers involved in this method, a clamp meter was introduced. These devices improve the safety from the traditional method of measuring the current flow (which is cutting a live wire and measuring the current flow through inserting a test lead on the circuit). Clamp meters are electrical instruments that can measure the flow of current in any conductor.
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