Gem Digital Refractometer

Brief Introduction

Gem Digital Refractometer is for measuring the gem refractive index of an unknown gem stones, it is covering the full range from 1.40 to 2.00. It gives a quick and reliable differentiation of diamonds and imitations colored stones from their many imitations.
 

If the instrument has been subjected to rough handling in shipment , or if your environments is very different in temperature,calibration adjustment may require.

1.      Turn on the “ ON” button

2.      Press “TEST” button until the “CAL” appears

3.      When the screen display “1.487”, place scale sample (1.487) on test platform, then press test button; now the screen display “1.806”, place scale sample (1.806) on the test platform, then press test button again.

4.      When the screen display “END”, the calibration is finished.

 

Technical parameters

Test Range: 1.400~2.000

Power Input: 9V Battery

Working Temperature: 10~30 Degree