• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
Ohm Meter - h1011v4_88
Ohm Meter - h1011v4_90

Electrical Science Volume 4 of 4
Page Navigation
  60    61    62    63    64  65  66    67    68    69    70  
Test Instruments & Measuring Devices OHM METERS Example 1: An ohm meter has a meter movement with a 100 µA full-scale deflection.   The open circuit voltage at terminals ab is 24 V.   The ohm meter is zeroed and then an unknown resistance Rx is measured, which produces quarter-scale deflection. Find Rx. Solution: First find Ro. Ro V Im 24 1  x  106 Ro 2.4  x  105 W  or  240KW Then solve for Rx: Rx 1 D D Ro 1 1 4 1 4 (240) (3)(240) Rx 720  KW Therefore, quarter scale deflection of this ohm meter face would read 720 KW. Example 2: An ohm meter with Ro = 30 W, and full scale current Im = 300 µA.   Find I with: 1) 0 W, 2) 5 W, 3) 10 W, 4) 15 W, and 5) 1 MW resistors across the meter terminal. Solution: First, the deflection factor for each resistor must be found. D Ro Ro Rx Rev. 0 Page 17 ES-14







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.