Presidium Gem Tester II - Assisted Thermal Calibration (For #PTG111425 and after)

Presidium Duo Tester II (PDT II) - Functionality Check

How to Calibrate Presidium Gem Tester ii (PGT II)

Guide on How to Calibrate Presidium Gem Tester

Carat Scale 100n (PCS-100n) - Calibration

Gem Tester II: Quick Diamond/Moissanite Identification & Colored Gemstone Separation

Presidium Gem Indicator (PGI) Library Function

Gold Karat Tester - Getting Started

Presidium Gem Tester II (PGT II) - Assisted Thermal Calibration

Guide on How to Calibrate Presidium Gem Tester

Did I REALLY Find Diamonds at the Car Boot Sale? Diamond Selector II Vs Presidium Gem Tester II

praesidium ELECTRONIC GEM GEMSTONE DIAMOND TESTER PGT

เครื่องตรวจเพชร Presidium Multi Tester III (PMuT III)

Presidium Duo Tester - Battery Insertion & Switching On