PRESIDIUM PRIM II Manual Del Usuario página 15

The display window (Fig. 2.3) will show the Refractive
Index of the gemstone.
Fig. 2.3
Due to infra-red light source, it is essentials that the facet
placed over the test pad hole is at least 3mm in diameter.
PC Connectivity via USB cable
Presidium Refractive Index Meter II comes with a CD as
an extension to more functions. This CD is included in the
package. Instruction manual on using the extended
functions is included in the CD.
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