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<p>[QUOTE=&quot;Bacchus, post: 9415689, member: 759&quot;]You are correct, the PMV measures resistivity and not resistance.&nbsp; The original discussion in this thread was the application of a DMM to measure resistance, and resistance is measured in ohms.</p><p><br /></p><p>Then the discussion veered off into using devices such as the Sigma Precious Metal Verifier (PMV), and that device measures resistivity in ohm-meters (Ω-m).&nbsp; My PMV instructions don’t explain much about the science behind the measurements, it doesn’t seem to even use the word “resistivity” much less μΩ-m, but I found Sigma references to resistivity in some of their other online documentation:</p><p><br /></p><p><a href="https://cdn.commercev3.net/cdn.bgasc.com/downloads/Sigma/FAQ-Sigma-PMV-Original.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://cdn.commercev3.net/cdn.bgasc.com/downloads/Sigma/FAQ-Sigma-PMV-Original.pdf" rel="nofollow">https://cdn.commercev3.net/cdn.bgasc.com/downloads/Sigma/FAQ-Sigma-PMV-Original.pdf</a> .</p><p><br /></p><p>Weeks ago I found a reference online (I can’t find the source now) that stated the PMV measurements were in microohms, and I didn’t think about it hard enough to realize that it should have stated microohm-meters.&nbsp; So all of my previous measurements should have been in μΩ-m.</p><p><br /></p><p>But regardless of the actual units, the PMV provides a number in its measurement mode, and my objective here was to provide my results of that number for the benefit of others also using a PMV in that mode.&nbsp; Others might find it beneficial to compare results.&nbsp; I would find somebody else’s results useful just as a sanity check that I was doing it right.</p><p><br /></p><p>I’m assuming a consistency of results so that a comparison of coin or bar measurements gives consistent results across different samples of the same bar/coin and across different PMV sets.&nbsp; I don’t have experience with a different PMV, but I can say that my gold bar measurements had the following characteristics:</p><p><br /></p><p>Sample size:&nbsp; 4</p><p>Sample average:&nbsp; 2.1875</p><p>Minimum value:&nbsp; 2.17</p><p>Maximum value:&nbsp; 2.21</p><p>Standard deviation:&nbsp; 0.01708</p><p><br /></p><p>My AGE measurements had the following characteristics:</p><p><br /></p><p>Sample size:&nbsp; 16</p><p>Sample average:&nbsp; 7.99375</p><p>Minimum value:&nbsp; 7.72</p><p>Maximum value:&nbsp; 8.48</p><p>Standard deviation:&nbsp; 0.24268</p><p><br /></p><p>So that provides some level of confidence in the consistency across different samples of the same type, although not across different PMV units.</p><p><br /></p><p><br /></p><p><br /></p><p>Tough crowd!&nbsp; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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