KERN & SOHN JE - Manual (Page 5)

Sauter GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected] Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Instruction Manual
JE
JE-BA-e-1211 5
- Before the sensor is placed onto the gemstone, the UV
light first has to be shined onto the stone for a few
seconds.
-It can also be left on and used while other tests are
performed.
Note: If the UV light will be left on for a longer period of
time, life of battery will be reduced respectively.
General information about UV light
UV light is usually used for observing the fluorescence
(glow) in UV security marks, which are otherwise invisible.
These can be found in banknotes, cheques, cheque cards
and anything marked with a UV security marker.
UV light is also widely used to detect modern surface paint
on antique porcelain or paintings, signatures added to
drawings and paintings, writing on letters and postcards
which are too feint to see in natural light. On Uranium
glass (Vaseline glass) it makes the entire object glow
vividly. In all cases, it helps to use the light in dim (if not
dark) conditions.
Not all diamonds fluorescent to the same extent, not all
diamonds fluoresce actually. Therefore, although UV light
is not diagnostic, you can make use of the fact that
diamonds fluoresce randomly. If there are several stones
and they all react in exactly the same way, it is unlikely that
they are diamonds. The fluorescence (and any
phosphorescence- a glow that remains after the UV light
has been turned off) must be observed in darkness, e.g. a
dark room or a special “dark cabinet”.
UV light is also used to help colour-grade diamonds, but it
is only used by professional diamond dealers or specialist
jewellers who know how to colour-grade diamonds in the
first place. White diamonds which fluoresce under UV light
also fluoresce under the UV that is present in daylight and
this can make a stone appear a better colour than it really
is, and so the diamond grader may wish to downgrade it by
one or two colours.
SAUTER GmbH provides a limited quality warranty of 24
months dated from the date of purchase, provided that the
tester has been used in normal environment and that its
use conformed to the operation provisions as mentioned
above. If there are defects in parts or technology under
normal using conditions, we will repair or replace the tester
free of cost. The quality warranty can only be applied to
the original purchaser of the tester. The invoice should be
kept as a proof.
We won’t be responsible for the consequences caused by
wrong operation or unsuitable use.
12. Maintenance
- Sensor and wire tip should be handled with extreme care,
especially when removing the protective cap from the
sensor ((if bent or broken, the Multi Tester cannot be
repaired).The protective cap always has to be put on
again, if the tester is not in use. The wire tip may not be
damaged, because this is not covered by warranty. - A worn battery may not be left in the battery
compartment, as it may corrode and damage the tester,
which is also not covered by warranty.
- If the Multi Tester is not going to be used for an extended
period of time (several weeks or more), the battery has to
be removed.
- A flashing “Wait” light means LOW BATTERY.
- If an universal power adaptor is used (optional item,
which can be purchased separately), this must be 9V DC
0.5A (centre negative) otherwise the tester won’t
work, or it will be burned out. None of these facts is
covered by guarantee.
- These warranty conditions will have to be noted for this
Multi Tester regarding abuse, misuse as well as
unauthorised repairs.
Only manufacturing defects and/ or part failures are
covered by warranty.
13. Declaration of Conformity