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2. PERFORMING A TEST with your Presidium Multi Tester III
Place the tip of the probe pen against the gemstone and
press the test button. Apply sufcient pressure on the tip
for correct reading.
For mounted jewelry or gemstones:
Hold the jewelry or gemstone with one hand and the
tester with the other hand (Fig. 2.1). For proper
operation of the tester, the thumb and index nger must
always be placed on the metal-plated serrated part
located on both sides of the tester at all times. Care
should be taken when testing mounted jewelry. User
must ensure that the stones are securely mounted before
conducting a test as gap between stone and setting might
lead to inaccurate reading.
Fig. 2.1
Fig. 2.2
For testing loose gemstones:
Place the gemstone on the metal stone rest and hold the
metal stone rest with one hand while holding the tester
with the other hand (Fig. 2.2).
Tips for using your Presidium Multi-Tester III
The probe tip must be placed at a right angle or
perpendicular to the facet of the gemstone for an
accurate reading.
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