PRESIDIUM PGI-TD5612 Mode D'emploi page 19

"Metal Detect" will display on the screen and an audible
sound is emitted (if 'Sound" is enabled at Settings) if the
probe tip touches metal or conductive material. (Fig. 3.2)
Fig. 3.2
PGI can test for up to 31 types of gemstones and their
ranges of individual thermal conductivity readings based
on the analog to digital (ADC) values are illustrated in Fig
3.3 on the next page.
In pursuing continuous product improvement and
enhancements, Presidium reserves the right to revise
the product software data, including the Presidium Gem
Indicator thermal conductivity and color charts.
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