Specifications: 1.Test Range: 1.400~3.000 2.Power Input: 9V Battery 3.Working Temperature: 10~28 Degree

High Accuracy/Digital Gem Refractometer /Jewelry tool RI: 1.400~3.000 nD

Introduction:

DG-501 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 3.00. It gives a quick and reliable differentiation of diamonds and imitations colored stones from their many imitations.

Calibration:

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

Turn on the “ ON” buttonPress “TEST” button until the “CAL” appearsWhen 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.When the screen display “END”, the calibration is finished.

 

Operation Instruction:

Prepare: Please clean the gem stone and the test platform carefully before using. Any dust or fingerprint will effect the testing result.Put the Sample: Turn on the refractometer, then the screen display “0.000”, placed your sample on the center of the test platform. Make sure the gem is centered.Test: Press the button “Test”, you can get the testing result and distinguish what kind of stone is.

Notification:

It is really very important to clean the sample and test platform before using.

Parts:

Please check the following items:

Digital Refractometer ……………………………………1

Scale Sample ………………………………………………2

Clean Cloth ………………………………………………1

Replace the Battery

When it is disable to turn on the refractometer, please replace the battery:

Digital Gem Refractometer RI: 1.400~3.000 nD