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Features of ohmmeters
There are many different makes and models of ohmmeter on the market today. However, there are also different basic types of ohmmeter available. There are devices that are used to measure low resistance and extremely low resistance.
Today, there are both analog and digital ohmmeters available. They have the same function and both can measure the current, resistance, and voltage. The digital ohmmeters tend to be very accurate, and they are commonly used in various applications today. This type of device will use an electronic circuit and will “pass a constant current through the resistance while a separate circuit measures the voltage across the resistance”. The analog ohmmeters utilize a battery to apply the voltage to the resistance.
How ohmmeters work
The micro-ohmmeter measures low resistance for contact and bonding applications. The milli-ohmmeters measure low resistance with high accuracy. There is also the megohmmeter, also known as an Insulation Resistance Tester. These are used to measure the electrical wiring insulation. It will measure the safety and resistance of that wiring.
An ohmmeter is an electrical instrument that is used for measuring electrical resistance, which is what causes opposition to an electrical current. They take the measurement in ohms, and were created by a physicist from Germany named Ohm.
Many companies today are manufacturing ohmmeters including Megger, Eldridge Product, Inc., Agilent Technologies, AMATEK, Automation Technologies, and Fluke Networks.