PRESIDIUM Gem Computer Gauge PGCG Mode D'emploi page 15

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• Slowly close the Slider. The reading will be displayed
on the window immediately.
• Press "ct/mm" to alternate between the following
displays:
1. Display of both dimension in mm and weight in
carat (by default)
2. Display of dimension in mm only
3. Display of weight in carat only
The default setting of Presidium Gem Computer
Gauge (PGCG) is programmed for American
Standard Round Brilliant Cut
For other gemstones of other shapes, please
directly proceed to the following steps.
b. Weight Estimator
Presidium Gem Computer Gauge (PGCG) estimates the
weight of the gemstone from the shape, diameter, depth
and nature of the gemstone.
The different shapes of gemstones as shown in diagram
below:
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