PRESIDIUM Dial Gauge, User Handbook Manual, Page: 10 / 84

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When measuring loose stones, pull the Slider (Fig.2.1)
and place the stone on the Slider platform. Note that the
base of the stone should be parallel to the platform to
prevent it from moving.
When measuring mounted stones, insert the jewelry
attachment to the gauge (Fig. 2.2) and place the stone
between the jewelry attachment and slider anvil.
2. PERFORMING A TEST with your Presidium Dial
Gauge
Fig. 2.1
Fig. 2.2