Quicktest DT-5 Instructions For Use

PREPARATION

Supplied with PP3 battery. To change battery, slide battery cover in direction of arrow, pull old
battery out gently, do not keep pulling until you pull the wires out. The stone holder is for loose
(un-mounted) stones, since you would not be able to hold them in your fingers.
This model is particularly good at coping with extremes of temperature. Unlike other models, it
has been calibrated for Northern Europe where outdoor markets and unheated halls can be
cold.
INSTRUCTIONS FOR USE
Turn the
SENSITIVITY
the segments will flash briefly. Gently remove the rubber protective cap from test tip
(remember to replace it after use). Slowly turn the
segments are lit (usually the four red segments, see
for the light, this takes about 30 seconds so you probably have 20 seconds remaining.
READY
Press test tip firmly onto the top of the diamond at right angles. Do not attempt to scratch the
stone or you will break or bend the test-tip. Make sure you are touching the metal plate on the
back, then if you miss the stone and touch the setting by accident an alarm will sound.
• Lights remain static (nothing happens) = not diamond
• Lights up slowly, doesn't register 'diamond' = not diamond
sapphire)
• Lights up past Segment 9 (three blue lights and bleeps) = diamond
Before the next test you must wait for the
(especially a small stone) warms it until, eventually, a diamond will no longer read
Wait two or three minutes for the stone to cool down.

SETTING THE SENSITIVITY

Turn the knob to light up the segments, set the starting-number like this:
METHOD 1:
Look at the chart on the back of the diamond tester. The range of sizes and
the temperatures are not critical, use them merely as a guide.
METHOD 2:
Memorise the following:
Unless you are working outside in the cold, start at No. 4 (or No.3
for large stones). If you are working in the cold, look at the chart
METHOD 3: Y
ou will soon get the 'feel' of how it works, in exactly the same way as getting
the 'feel' of gears in a car or bicycle without having to think about it. The
starting-segment is irrelevant, you will know if you have a diamond from the
speed the lights move, and you will know that large / cold stones react faster
and that small / warm stones react slower.
DIAMOND TESTER, MODEL DT-5
knob just enough for it to click. The
BATTERY OK
SENSITIVITY
SETTING THE SENSITIVITY
light. Repeatedly testing the same stone
READY
light will light up and
knob until some of the
below). Wait
(probably ruby or
DIAMOND
.