Portable gem digital display refractometer Jewelry inspection index test instrument gem digital refractometer Without oil test 1pc
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Instrument calibration:
Long-term use or the instrument is subject to strong vibration and other harsh conditions, with the test quick check found a greater error, you must re-calibrate the instrument.
1. Turn on the ON button.
2. Press and hold the TEST test button for 5 seconds until "CAL" appears.
If the display "1.487", then put the 1.487 calibration fast, press the TEST key once, then the screen displays "1.806", then put the 1.806 calibration fast, press the TEST key once, there "END" words, calibration is complete.
Description:
Jewel digital refractometer is a portable digital instrument, mainly used to measure the
refractive index of precious stones;
Can quickly distinguish between precious stones and glass imitation, and can determine
the variety of gemstones, is a very simple gem detection equipment;
Refractive index, reflectivity dual use
Oil-free test, the measurement range: 1.40-2.00;
The use of imported high-quality microcomputer processor, digital circuit design, not the
impact of ambient light, data stability;
Working temperature: 5-30 °;
Indication error: ≤ ± 0.008;
Use power: 9 stacked batteries; equipped with two standard refractive index blocks.
Pay attention:
1. The test sample must have a plane with a diameter greater than 3 mm
2. The test surface of the test sample must be polished well, the test value of the poorly polished sample will be lower than the true value
3. Surface oil, fingerprints and other serious impact on the measurement accuracy, sample test surface must be clean
4. Keep clean, wash the table before testing, cover the dust cover after the test, can not let the dust into the test hole
Instructions:
1. Preparation: Please carefully clean the sample surface before use, test platform, any dirt have a greater impact on the measured value. Alcohol and other reagents can be used to carefully clean the sample test surface.
2. Put the sample: turn on the power switch, LCD display number: 0.000 words, the sample carefully into the test platform to test the center of the symmetrical position. (Special attention: must be symmetrical place)
3. Test: Press the TEST key to display the refractive index of the measured sample.
Note
1. If your area is a remote area, you will need to add a separate fee.
2.when the parcel arrived to your customs,please pay the tax and pick up the parcel,we are not responsible for any customs duty or import tax.
3.If you have any questions about our products, or what other things do you want to know ,please contact us ,thank you.
