Common Questions - Sigma Metalytics PMV Pro PRO Manual

Common Questions

Our "Pure Silver" range is calibrated to put .9999 silver in the green and .999 silver in the yellow on the right. We do this
1. Why does my silver read in the yellow?
because we so frequently see .999 silver counterfeited that we want all users to be cautious of .999 silver samples and
to check the other aspects (markings, weight, and size) of the sample prior to making any judgment. If you are using an
onboard sensor, you can use the PRO's sizing feature to confirm the size of the sample.
The left side of the reading range indicates less resistivity and the right side indicates more resistivity. If a sample reads to
2. What does a reading to the left versus to the right mean?
the left, it means it is less resistive than expected; if a sample reads to the right, it means it is more resistive than expected.
Modern coinage is designed to have the same resistivity as older 90% silver coinage to ensure they all work in vending
3. Why do my modern sandwich quarters read in the range on 90% silver?
machines. The best way to ensure your quarters are 90% silver is to check their weight: modern quarters are about 0.5
grams lighter than older quarters.
The device needs to be actively measuring the sample when you press the MEASURE button to bring up the dimensions
4. Why doesn't the dimension screen come up?
verification screen. If the device is not actively reading a sample, pressing MEASURE will not bring up the dimensions screen.
The device will ask for calibration when powering on and when plugging in an attachment. In regular use, we recommend re-
5. When do I need to re-calibrate?
calibrating the device every 25 - 30 minutes; this ensures the device's properly measuring samples. Simply clear the device
of all samples and press the CAL button to re-calibrate.
The PMV PRO electronically measures thickness and takes the average thickness from the face of the coin while trying to
6. Why does the device provide a different thickness measurement on coins than the mint or a retailer?
account for relief, design, and lettering. Mints and retailers measure coin thickness using calipers at the rim, not the face.
Because of this different method of measuring, the PRO's thickness measurement is usually slightly thinner than what's
published by the mint or retailers.
The PMV PRO can go for 6 - 8 hours of constant use before needing a charge. The device has a high-capacity battery, so you
7. How long does the battery last?
can leave it charging overnight or for long periods without damaging the system.
More questions? Give us a call at 530.562.4589 or shoot us an email at info@sigmametalytics.com
20