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Student & Learning Zone - City & Guilds
Confused beginner's question about testing
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<blockquote data-quote="ianmacd" data-source="post: 148824" data-attributes="member: 2977"><p>That would not be measuring the parallel paths in the ring then. By reversing the N1 to P2 and P1 to N2 you should end up getting a constant reading at all points as the parallel path lenghts will then be equal</p><p></p><p>When testing R1+R2 on a ring, you are also testing the polarity is correct at the socket. The reading taken will be the combined resistance of all the parallel paths. If you have measured r1,r2 and rn (ring continuity) then the R1+R2 should be approx (r1+r2)/4.</p><p></p><p>Think you are mixing your lower case and upper case r's there but yes its measured at as many points as practicle.</p><p></p><p>Have you got a copy of the On Site Guide? The Part P Doc's book is good too.</p></blockquote><p></p>
[QUOTE="ianmacd, post: 148824, member: 2977"] That would not be measuring the parallel paths in the ring then. By reversing the N1 to P2 and P1 to N2 you should end up getting a constant reading at all points as the parallel path lenghts will then be equal When testing R1+R2 on a ring, you are also testing the polarity is correct at the socket. The reading taken will be the combined resistance of all the parallel paths. If you have measured r1,r2 and rn (ring continuity) then the R1+R2 should be approx (r1+r2)/4. Think you are mixing your lower case and upper case r's there but yes its measured at as many points as practicle. Have you got a copy of the On Site Guide? The Part P Doc's book is good too. [/QUOTE]
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Confused beginner's question about testing
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