Micro ohm meter is a device that measures the amount of electrical friction generated as electrons pass through an electrical conductor. A current is passed through a resistor and the voltage drop is measured on the other side. Micro ohm meter follows Ohm’s law by a given current and voltage you can measure the resistance of a resistor by V=IR.
There are available two basic types of micro ohm meter which are used to measure resistance. The first type is digital, and the second type is analog. The more versatile and simpler is the digital one. However, because different digital ohmmeters offer different features and functions, learning to operate one effectively requires reading the operator’s manual.
If you want to know more about micro ohm meter, you can go further through this article. By checking out the following information, you will find some options of micro ohm meter that available nowadays.
Low-Cost Audio Micro Ohm Meter
The Audio Micro Ohm Meter uses synchronous detection to measure low value resistances. The circuit provides a variable frequency audio tone to indicate the resistance under test. Such a tone is invaluable when troubleshooting shorted tracks on multi-layer circuit boards.
This Audio Micro Ohm Meter comes with Timer U4 which generates a 9V 1KHz square wave carrier signal that is injected into Rtest at J1. The AC amplifier U2A amplifies the signal. The sensitivity of the circuit may be adjusted by potentiometer R16, which changes the AC amplifier gain over a three to one range. The amplitude of the 1KHz waveform at the output of U2A is proportional to the resistance of the resistance under test, Rtest.
Precision Micro Ohm Meter
Precision Micro Ohm Meter is used for measuring and recording of contact resistance. It features highest precision measurement available, over 2000 test with 10ADC output, large LCD display with lighting, self calibration, optional external supply for Winding Resistance measurements (WR50-1A), built in panel printer, automatic measurement detection mode, single multi-actuation rotary knob, continuous measurement mode, and more.
AEMC 6240 2129.80 10A Micro-Ohmmeter
The AEMC 6240 2129.80 10A Micro-Ohmmeter is a rugged, low resistance tester designed for both plant maintenance and field use. Utilizing a four-lead Kelvin method of testing, the Model 6240 Micro-Ohmmeter accurately measures very low resistance within 0.25%. The Model 6240 has selectable test currents of 10A, 1A, 100mA and 10mA and includes a polarity reversal function.
The Model 6240 micro ohm meter is designed to conduct tests on both resistive and inductive material. Up to 99 measurements can be stored and printed directly to a printer or from a PC. The DataView Software included allows you to configure the instrument, temperature compensate the test results, as well as, store data and print reports.
AEMC 5600 1431.01 Micro-Ohmmeter 5000V
This is the other option of micro ohm meter that performs accurate, reliable low resistance measurements with test current to 10A and resolution to 1mΩ. The Model 5600 uses a four-wire Kelvin Bridge method, which eliminated test lead resistance for a measurement accuracy of 0.25%. A reverse polarity switch compensates for the effect of DC voltage interference on the accuracy and permits reading averaging. A built-in circuit filters against AC signals. The Model 5600 features an automatic shutoff after four minutes on non-use.
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