LOW_RANGE_OHMMETER

Published:2009/7/16 2:42:00 Author:Jessie | From:SeekIC

This direct-reading self-contained low-ohms meter uses the four-wire, constant-current method of resistance measurement. That eliminates any effect of test-lead resistance on measurements. T1 is a 1:1 audio transformer, 600:600Ω. D3 is an optional Zener diode to protect the digital panel meter module DPM from excessive input voltage. The lowest reading for this circuit is 1mΩ.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Measuring_and_Test_Circuit/LOW_RANGE_OHMMETER.html

Print this Page | Comments | Reading(3)