1, control the needle  2. Three-color display lamp    3. Power indicator light  4. Prepare the indicator light  5. Power switch/adjustment button  6. Battery cover plate

  Technical features:
  Pocket-size portable handheld.
  2. Non-destructive testing, easy and accurate operation.
  3. Working power supply: DC9V battery
  4. External dimension: 162*42*22MM weight: about 160g

  Operation method:
  1. Turn on the power, and the power indicator is on. The instrument starts to preheat.
  2. Put the tested naked drill into the appropriate concave hole of the supporting tray and turn its table upside down. The enchase does not need to place the tray hole, but to hold it.
  3. Adjust a number of light-emitting diodes according to the weight of the diamond and the temperature of the measuring site.
  4. Remove the probe sheath and touch the conductive plate on the rear cover of the instrument with the hand instrument and the right index finger; Make the probe vertically and gently contact the surface of the diamond to be tested.
  5. Watch carefully for the reflection of the instrument. If the remaining yellow light-emitting diodes light up, when they light up to 9 diodes, with a beeping sound, this indicates that the subject is a real diamond. On the other hand, if less than 9 are lit and the instrument does not emit a sound, the fake diamond or counterfeit is indicated.
 
  Repair and maintenance:
  1. The probe of the instrument is very sensitive and must be protected with special care.
  2. When the indicator light is dark, it means that the battery will run out. The battery should be replaced in time.
  3. The device is not in use for a long time, please remove the battery.
  4. In order to detect the accuracy, it is recommended to calibrate it once a year.