# Measuring Instruments

Electrical and Electronics Engineering Tools, Instruments, Devices, Components & Measurements

• ## Why Does an Electric Tester Not Work in DC Circuits?

Why Does an Electric Tester Work Only in AC, but Not in DC Circuits? Electric testers, often referred to as voltage testers, phase testers, mains testers or test pens, are…

• ## How to Test Earthing – Grounding System using a Light Bulb?

How to Check the Grounding or Earthing System at Home using a Light Bulb? In today’s tutorial, we will demonstrate how to test and check the earthing or grounding system…

• ## How to Test Grounding / Earthing System using a Multimeter?

How to Check Earthing and Measure Ground Resistance using a Multimeter? Measuring ground resistance using a multimeter is generally not as accurate as using specialized ground resistance testers, but it…

• ## How to Measure Earth Loop Resistance Using Ammeter and Voltmeter?

How to Measure Earth Loop Impedance Using Ammeter and Voltmeter? Purpose of measuring earth loop resistance is essentially to determine the resistance of the path through which current flows towards…

• ## How to Test and Measure the Ground Resistance using a Megger?

How to Check Earthing and Measure Ground Resistance using Megger Earth Tester? A Megger, or Megohmmeter (also known as Megger earth tester), is a specialized instrument commonly used for insulation…

• ## How to Measure Resistivity of Earth Using Wenner Method?

Wenner 4-Point Method for Testing the Specific Resistance of Soil What is Wenner 4-Point Test? The Wenner Method (named after Dr. Frank Wenner of the US Bureau of Standards in…

• ## How to Test the Earth Fault Loop Impedance – Various Methods

Testing and Measuring Earth Fault Loop Impedance using Different Methods What is Earth Fault Loop Impedance (EFL)? Earth fault loop impedance refers to the electrical resistance in the earth path…

• ## How to Measure Ground Resistance? – Testing Earth Resistance

How to Measure the Earth – Ground Resistance using Different Methods? Grounding, also known as earthing, is a safety practice and technical technique that involves connecting electrical systems and equipment…

• ## What is Ground Resistance Tester – Working of Ground or Earth Tester

Earth – Ground Resistance Tester – Construction, Working and Applications Earth or ground resistance testers play a vital role in assessing the effectiveness of grounding and earthing systems by measuring…

• ## Circuit Diagram of Digital Voltmeter Using Using ICL7107

Schematic Diagram of Digital Voltmeter With LCD Display Using ICL7107 – DIY Project Kit The ICL7107 is a high-precision analog-to-digital converter (ADC) that can be used to build a digital…