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<p>[QUOTE=&quot;Bacchus, post: 9580225, member: 759&quot;]More detailed testing of a 10 ozt silver bar and ASE.</p><p><br /></p><p>Coin/Bar.&nbsp; &nbsp; &nbsp;&nbsp; PMV sensor&nbsp; &nbsp; case&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Meas. 1.&nbsp; &nbsp; &nbsp;&nbsp; Meas. 2.&nbsp; &nbsp; &nbsp;&nbsp; Meas. 3</p><p><br /></p><p>ASE 2022.&nbsp; &nbsp;&nbsp; Main&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; none&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 1.65&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.63&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.63</p><p>ASE 2022.&nbsp; &nbsp;&nbsp; Small Wand&nbsp; &nbsp;&nbsp; none&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 1.62&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.63&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.63</p><p>ASE 2022.&nbsp; &nbsp;&nbsp; Large Wand&nbsp; &nbsp;&nbsp; none&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 1.65&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.65&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.63</p><p><br /></p><p>ASE 2022.&nbsp; &nbsp;&nbsp; Main&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Air-Tite&nbsp; &nbsp; &nbsp; 1.63&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.62&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.62</p><p>ASE 2022.&nbsp; &nbsp;&nbsp; Small Wand&nbsp; &nbsp;&nbsp; Air-Tite&nbsp; &nbsp; &nbsp; ———&nbsp;&nbsp; no readings.&nbsp; ———&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </p><p>ASE 2022.&nbsp; &nbsp;&nbsp; Large Wand&nbsp; &nbsp;&nbsp; Air-Tite&nbsp; &nbsp; &nbsp; 1.62&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 1.61&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.64</p><p><br /></p><p>10 ozt bar.&nbsp; &nbsp;&nbsp; Main&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; none&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 1.59&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.59&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.59</p><p>10 ozt bar.&nbsp; &nbsp;&nbsp; Small Wand&nbsp; &nbsp;&nbsp; none&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 1.58&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.59&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.59</p><p>10 ozt bar.&nbsp; &nbsp;&nbsp; Large Wand&nbsp; &nbsp;&nbsp; none&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 1.59&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.60&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.59</p><p><br /></p><p>10 ozt bar.&nbsp; &nbsp;&nbsp; Main&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; zip bag&nbsp; &nbsp; &nbsp; 1.59&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.59&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.59</p><p>10 ozt bar.&nbsp; &nbsp;&nbsp; Small Wand&nbsp; &nbsp;&nbsp; zip bag&nbsp; &nbsp; &nbsp; 1.56&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.57&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.57&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; </p><p>10 ozt bar.&nbsp; &nbsp;&nbsp; Large Wand&nbsp; &nbsp;&nbsp; zip bag&nbsp; &nbsp; &nbsp; 1.58&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.59&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.61</p><p><br /></p><p>I was previously converting to 10 nΩ-m, but while measuring with the PMV using scientific notation based on metric prefixes (μ, n) is a needless extra step.&nbsp; I’ll guess that the PMV measurements are 10^(-8) Ω-m, but all I really need to do is compare the PMV measurement as displayed with the resistivity table material mantissa, which is the number before the exponent (I had to look that up.). </p><p><br /></p><p>So, the table shows the resistivity for silver as 1.59x10^(-8), but the mantissa is 1.59.&nbsp; My PMV measurements above range from 1.57 to 1.65, and that’s all I really need.&nbsp; It’s good to know that the exponent and units are 10^(-8) Ω-m, if all of my conjecture here is correct, but not necessary to verify the readings indicate the expected metal.</p><p><br /></p><p>And in the case of my silver bar and ASE I like the results.&nbsp; The resistivity table mantissa is 1.59, and that is what the PMV measurements show on the bar and pretty close on the coin.</p><p><br /></p><p>Some comments, though, about these measurements with the PMV.&nbsp; I made these measurements using the following finesses:</p><ol> <li>On the ASE, the wand measurements are smaller if taken from the flat part of the fields.&nbsp; Readings from some of the “busier” parts of the design could range up to 1.73.&nbsp; I moved the wand around the coin face to find the lowest value.&nbsp; It is also important to make sure all of the wand disc sensor is over the coin.&nbsp; If some of the wand is just off the edge of the coin, the readings go way up.</li> <li>On the bar, the readings were lower on the flat reverse.&nbsp; The obverse had lettering and also rounded edges at the sides.&nbsp; The obverse readings could easily be as high as 1.65 or more, depending on where you placed the wand.&nbsp; There are probably lots of bars with lettering on both sides, I was lucky to have a flat side with no lettering.&nbsp; I think it is what is called a cast bar.</li> </ol><p>I’ll redo my gold tests later.&nbsp; A complication will be that I won’t be willing to remove my gold bars from their assay sleeves, but I can certainly take an AGE out of its air-tite.&nbsp; The AGE is what I’m most curious about given its poor measurements with the PMV. </p><p><br /></p><p>And I don’t think there is anything wrong with the PMV or its design, it is probably my technique:&nbsp; maybe the 1/4 ozt AGEs shouldn’t be tested in the air-tites.</p><p><br /></p><p>By the way, the PMV has more than one sensor, based on the form of the item being tested.&nbsp; There is a “main” sensor, a small wand, a large wand, and a bullion wand (which I don’t have).&nbsp; In my two items above, there didn’t seem to be a results difference between the main sensor and the wands, except the small wand wouldn’t give me a reading for the ASE in air-tite.[/QUOTE]</p><p><br /></p>

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