PRESIDIUM DC708N, Руководство пользователя

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Place the tip of the probe pen against the gemstone.
Apply minimal pressure to fully depress the tip into the
probe pen for correct reading. This is to provide a steady
and constant contact made between the probe tip and the
gemstone.
For mounted jewelry or gemstones:
Hold the jewelry or gemstone with one hand and the
tester with the other hand
(Fig. 2.1).
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
2. PERFORMING A TEST with your Presidium Gem
Tester II
For testing loose gemstones:
Place the gemstone on the metal stone rest and hold the
metal stone rest with one hand while holding the probe
with the other hand
(Fig. 2.2).
Note: Metal stone rest is not provided by Presidium.
Fig. 2.2