PRESIDIUM Diamond Mate PDMT Series, User Handbook Manual

Page: 14 / 108

14
Test should be conducted on the table of the gemstone.
In the event of any doubt, kindly test on the girdle of the
gemstones instead.
For proper operation of the tester, fingers must be placed
on the metal-plated serrated located on both sides of the
tester at all times.
To achieve optimum accuracy for tests involving very
small mounted gemstones (1.2 mm exposed diameter
and below), it is extremely important that no contact is
made on any mounted/ metal part of the jewelry piece.
To achieve optimum accuracy for tests involving very
small gemstones (10 points and below), it is important
to allow the gemstone to cool down before subsequent
tests.
It is advisable to take multiple readings regarding the test
results indicated.
Cleaning the probe tip
Please note that if the tester is being used for the first
time, or if the tester has not been used for a week, it is
advisable to clean the probe tip using a piece of paper to
attain a consistent and accurate reading:
• Ensure the unit is switched off.
• Hold the probe pen with the pen tip forming a
right-angle (90-degree) with any paper or stone rest
(as provided). Gently move in a circular motion
without retracting the tip (Fig. 2.3).
• Repeat the same motion several times. The cleaning
process is completed and the tester is now ready
for use.
Fig. 2.3