GemOro PRO-M 3 User manual

MOISSANITE TESTER
WITH NEW ADVANCED
PATENTED UV-F1
IDENTIFICATION
TECHNOLOGY™
PRO-M 3

GEMORO PRO-M 3 2 3
The GemOro PRO-M 3 is the ultimate
tester for diamond fraud protection!
The PRO-M 3 features exclusive UV-
F1 TECHNOLOGY™ and is capable of
identifying the widest range of the
electrically conductive moissanite
material available, including the new
super-low electrically conductive
Forever One moissanite.
OPERATING PROCEDURE
& OWNERS MANUAL
Congratulations on your purchase
of the PRO-M 3 from GemOro
Superior Instruments, the most
trusted name in gemological
instrumentation for the jewelry
industry. You’ve made a great
choice. Built upon the foundation
of the second generation and most
popular moissanite tester to date,
the PRO-M 3 offers even more.
Identify moissanite with confidence.
IMPORTANT: PLEASE BE CERTAIN
TO READ THE FOLLOWING
COMPLETELY BEFORE USING.
ELECTRICAL CONDUCTIVITY
TESTING METHODS
The recognized, most practical way
for separating the vast majority of
moissanite gemstones from diamond
is the electrical conductivity test;
since most moissanite conducts
electricity, while diamonds, as well
as other known diamond simulants
do not. It should be noted that while
the vast majority of moissanite may
be electrically conductive, in some
moissanite gemstones there might
only be electrical conductivity in
varying degrees. Further, with the
READ BEFORE USING
A high percentage of the
new generation, super-low
electrically conductive Forever
One or “F1” moissanite that
was introduced in late 2015
will incorrectly be identified
as diamond when tested on a
traditional combination electrical
and thermal conductivity
tester. However, your PRO-M
3 electrical conductivity tester
uses the new patented UV-
F1 TECHNOLOGY™, and it is
exclusively calibrated to identify
this faint electrical conductivity
property. Please note that the
new Forever One moissanite
can no longer be easily visually
identified, as it is now D-E-F
“colorless”, with few inclusions.
Be aware that body oil is also
electrically conductive. Due to
the tester’s enhanced sensitivity
for electrical conductivity, dirty
diamonds may potentially test
as moissanite. To avoid false/
positive readings on dirty
diamonds, ALWAYS CLEAN
THE STONE by simply wiping
the body oil off on the provided
STONE TESTING CLOTH prior to
performing a test. Periodically,
also clean any accumulated
body oil off of the probe tip by
gently rubbing it on a piece of
uncoated paper - SEE MANUAL.
NEED HELP? Call GemOro
at 800.527.0719 for
immediate assistance.

GEMORO PRO-M 3 4 5
new Forever One moissanite its
electrical conductivity may be so
faint that most testers may not
be able to correctly identify it at
all. But have no fear. With the new
PATENTED UV-F1 TECHNOLOGY™
built into the PRO-M 3, you can
identify the widest range of
electrically conductive moissanite
material available, including the new
super-low electrically conductive
Forever One moissanite.
Other than some rare and natural
colored diamonds, as well as some
lab grown synthetic diamonds,
natural white diamonds do not
conduct electricity. If a stone does
not conduct heat or electricity, it will
be determined to be more than likely
a common CZ or other diamond
simulant. Because hand-oil is
electrically conductive and the stone
being tested may not be clean, any
test result that indicates moissanite,
especially on smaller size stones
that haven’t been cleaned, should
be suspect, cleaned, and retested.
Due to the electrical conductivity
properties of some of the chemicals
commonly used in the production
of lab-grown synthetic diamonds,
when the PRO-M 3 probe tip touches
these stones the metal alert feature
of the PRO-M 3 may be set off.
The GemOro Superior Instruments
PRO-M 3 utilizes the electrical
conductivity test and it will quickly
help in identifying and separating the
stone in question. The PRO-M 3 is an
advanced, technologically based tool.
IMPORTANT DISCLAIMER: The
PRO-M 3 is a helpful screening tool
that by design is to be used as a
quick method for helping to identify
moissanite. The PRO-M 3 should
not be used as the final method
for determining the authenticity
or identity of the gemstone being
tested. The final determination of the
identity of any gemstone, whether
genuine or not, should only be made
by a trained gemologist. Neither
GemOro nor any of its affiliates,
dealers, or distributors shall be held
liable for any loss and/or damages
associated with the use of the PRO-M
3. No warranties exist with respect
to the PRO-M 3 or its use other than
those expressly contained herein.
All other warranties of any kind
or character whatsoever, whether
expressed or implied, including
warranties of merchantability or
fitness for a particular purpose, are
hereby disclaimed and are excluded
from the warranties hereunder.
In the event that a claim is made
with respect to the PRO-M 3 or
its use, the maximum liability of
GemOro, and its affiliates, dealers,
and distributors shall be the
amount paid for the PRO-M 3.
PLEASE READ BEFORE USING THE
PROVIDED NiMH RECHARGEABLE
BATTERIES: Before using the
NiMH rechargeable batteries that
have been provided with your
tester, the batteries should be fully
charged as indicated by the small
round LED indicator next to the
power button glowing green when
the PRO-M 3 is plugged in. While

GEMORO PRO-M 3 6 7
the batteries are being charged,
the tester may be used as desired
while powered by the AC current.
CONDITIONS FOR
IDEAL OPERATION
1. The stone being tested must
be clean. Aside from obvious
visible dirt that may be present
on the stone, there may also be
hand oil or other contaminates
on the stones surface that
may not be visible and which
could impact the accuracy of
the test. Always be certain to
clean the stone being tested
with an ultrasonic or steamer or
other appropriate means, and
thoroughly dry it and/or remove
any cleaning chemicals remaining
on the stone prior to testing.
2. The stone being tested must be
dry. If the surface of the stone is
wet or has any type of surface
moisture it may not test correctly.
3. The stone being tested must be
clean. Aside from obvious visible
dirt that may be present on the
stone, there may also be hand,
body oil or other contaminates on
the stones surface that may not
be visible and which could impact
the accuracy of the test. Always
be certain to clean the stone being
tested with an ultrasonic or steamer
or other appropriate means, and
thoroughly dry it and/or remove
any cleaning chemicals remaining
on the stone prior to testing. A
GemOro STONE TESTING CLOTH
(shown below) has been provided
with each PRO-M 3 and for
convenience it should be used to
wipe any hand or body oil from
the stones surface prior to testing.
4. It is imperative that the probe tip
be cleaned regularly or ideally
prior to performing a test. Please
be aware that there may be hand
oil or other contaminates that may
not be visible on the probe tip,
which could impact the accuracy
of the test. To clean the tip, take a
piece of uncoated white printer or
copy paper and place the probe
tip of the tester at a 90 degree
angle against the paper while
gently rubbing it in a forward
motion a few times. Repeat this
process routinely or prior to
testing each time to ensure the
cleanliness of the probe tip.
PRO-M 3 FEATURES
1. Helps to identify the largest
range of electrically conductive
moissanite, including the new
super-low conductivity Forever
One moissanite. The test results
are shown via its PATENTED
color-coded light pipe and
unique sounding beep tones.
2. Quickly assists with testing
most any size moissanite,
whether mounted or loose.

GEMORO PRO-M 3 8 9
3. The sleek and ergonomic shape
comfortably rests in and on your
hand when held, and the tester
has PATENTED intuitive finger
grip pads for increased user-
friendliness and ease of use.
4. The LED illuminator is positioned
under the probe tip. The LED
Illuminator is a super bright
UV LED that illuminates
the stone being tested.
5. The tester is equipped with a
retractable probe tip designed to
protect the probe tip if excessive
force is used while testing or
if it is accidentally dropped.
6. The tester housing is made from
durable ABS and is covered
with GemOro’s exclusive
rubberized paint that provides
an even greater grip.
7. Powered by (3) supplied 1.5V
AAA NiMH rechargeable
batteries and conveniently
charged by a micro-USB adapter.
The rechargeable batteries
may be substituted with AAA
alkaline batteries if a suitable
power outlet is unavailable to
recharge the NiMH batteries.
8. The tester is also designed
to have its batteries charged
with the optional GemOro
UltraDock 3 charging station
accessory (Item #0772).
9. Includes a GemOro protective
ballistic nylon carrying case,
aluminum loose stone holder,
GemOro Test Stone Cloth, as
well as (3) user-replaceable
AAA NiMH rechargeable
batteries, a universal multi-
voltage 100V-240V AC
adapter / charger cube with
premium micro-USB cord.
10. The tester is also designed to be
used with the optional handy
PATENTED GemOro Test Stone
Magnifier attachment, which
when clipped onto the tester’s
tip area allows the user to
more easily see and test small
diamonds without accidentally
touching the setting or prongs
(Item #0780).
11. The tester has an auto-off
function to preserve the battery
life and it will automatically
turn itself off after a period of
10 minutes of non-use. After
powering down, if you wish to
resume using the PRO-M 3, simply
touch the tester’s power button
and within seconds the tester
will turn itself back on again.
12. Glowing LED Light Pipe
and Probe Tip Indicator.
Innovative PATENTED colored
LEDs visually indicate:
BLUE = Moissanite A
RED = Metal Alert B

GEMORO PRO-M 3 10 11
13. LED Indicator. The round LED
indicator is located next to the
oval shaped power button C:
GREEN = Fully Charged Batteries
YELLOW = Charging Batteries
RED = Low Batteries
14. Bright green LED illuminated
power button.
15. Pocket-sized and portable.
16. Simple to operate.
SPECIFICATIONS
• Working Voltage: DC 1.2V (3) x AAA
NiMH, DC 1.5V, (3) x AAA alkaline
batteries or its universal voltage
100V-240V AC adapter cube.
• Probe Tip Warm-Up
Time: Immediate.
• NiMH and Alkaline Battery
Working Time: Approximately
two hours of continuous use.
• Working Temperature:
65°F-80°F (18°C-27°C).
• Air Relative Humidity: 45%-75%.
• Net Weight: Approximately
100g (including batteries).
CAUTION
DO NOT disassemble the PRO-M 3
other than to replace the batteries
or the warranty will become void.
OPERATION
1. NiMH Battery Usage and Alkaline
Battery Installation: To activate
the (3) NiMH rechargeable
batteries, REMOVE THE BATTERY
DISCHARGE INSULATOR TAB
D that is extending out of the
battery compartment by simply
pulling it out. To increase the
life of the NiMH rechargeable
batteries, after removing the
discharge insulator tab in the
battery compartment, fully
charge the batteries prior to use.
If you wish to replace the NiMH
batteries with alkaline batteries,
BATTERY LED INDICATOR
C
MOISSANITE
A
METAL ALERT
B

GEMORO PRO-M 3 12 13
remove the battery compartment
door located on the end of the
PRO-M 3 by using your thumb
to slide the textured area down
and in the direction of the
arrow E. Remove the NiMH
rechargeable batteries while
making note of the polarity
positioning on batteries. Then
insert (3) high-quality AAA 1.5V
alkaline batteries into the battery
compartment. The proper polarity
positioning is indicated on the
side of the battery compartment
wall showing the direction of
positive (+) and negative (-)
polarity F. Always be certain
that the batteries are correctly
positioned in the battery holder.
Then carefully replace the
battery compartment door.
2. The PRO-M 3 batteries may
be charged by placing it in the
optional UltraDock 3 battery
charging station with the micro-
USB power cord plugged into the
rear of the charging station or by
plugging its supplied micro-USB
power cord into the rear of the
tester and the USB adapter cube
directly into a wall outlet. Once
the tester is connected to the AC
adapter or the charging station,
the tester will switch to its DC
power mode. The tester’s built-in
Intelligent Charging Circuit ICC
will automatically identify the
type of batteries installed (NiMH
rechargeable batteries or alkaline
batteries). If alkaline batteries
are installed, the circuit will
automatically cut off the power
supply to the batteries so that
the alkaline batteries will not be
recharged. If NiMH rechargeable
batteries are installed, the
batteries will be recharged and
at the same time the tester may
be used with the AC adapter.
3. To turn the PRO-M 3 ON press
the oval shaped power button,
located on the top center edge
BATTERY POLARITY
F
TESTER BATTERY COMPARTMENT
E
BATTERY DISCHARGE INSULATOR TAB
D

GEMORO PRO-M 3 14 15
of the tester G and hold it down
for approximately one second,
then release the button. There
is no warm-up time required.
When the green LED lights up a
beep tone will be sounded. You
may now begin using the tester.
4. To turn the PRO-M 3 OFF, press
the oval shaped power button
once again G and hold it down
for approximately one second,
then release the button. The
power button’s blue LED indicator
will no longer be illuminated
indicating it has been turned OFF.
If the PRO-M 3 has been left on
for a period of approximately 10
minutes without being used, it
will automatically turn itself OFF.
5. The PRO-M 3 is also equipped
with a PATENTED color-coded
light pipe and probe tip cone
indicator. This line of sight
colored indicator allows the
user to easily see the test
results while keeping their eyes
on the stone being tested.
BLUE = Moissanite
RED = Metal Alert
6. Prior to using the PRO-M 3, be
certain to REMOVE THE WHITE
CAP at the front end of the
tester that serves to protect
the probe tip from accidentally
being bent or broken H. The
cap may be easily removed
by simply applying a minimal
amount of pressure to the sides
of the cap, as you hold it between
your thumb and forefinger.
Then gently pull it out and off.
Always replace the cap when
the PRO-M 3 is not in use.
7. To properly hold the PRO-M 3, it
is important to grasp the tester
with your thumb and forefinger
while touching them to the
PATENTED finger pads located
on either side of the tester I
This will allow you to easily
manipulate the tester and make
the best contact with the stone
being tested. While holding the
tester, its ergonomic shape allows
it to comfortably rest in and
on the top of your hand. If you
hold the tester without touching
the finger pads, the metal alert
feature will not function.
PROBE TIP CAP
H
POWER BUTTON
G

GEMORO PRO-M 3 16 17
8. The LED Illuminator allows the
user to easily see the stone being
tested to confirm that only the
stone is being tested and that
the setting or prongs are not
accidentally being touched. This
LED is a special UV type J that
may also be used to identify
the fluorescence characteristic
found in approximately 30%
of all diamonds. You may also
attach the optional GemOro Test
Stone Magnifier (Item# 0780)
to the PRO-M 3 by clipping it
onto the end of the tester’s
probe tip cone. This will allow
you to see a magnified view of
the stone being tested and help
ensure proper contact with the
stone while not accidentally
touching the setting or prongs.
9. Testing Mounted Stones: With one
hand, hold the ring (or setting)
that contains the stone you wish
to test and in your other hand
hold the PRO-M 3 K. NEVER
TEST A RING WHILE PLACED
IN A RING BOX OR IT MAY NOT
TEST CORRECTLY. Quickly, yet
firmly touch the testers probe tip
to the stone’s table, while being
certain not to allow the probe tip
to make contact with the metal
setting or prongs. While firmly
depressing the retractable probe
tip all of the way in until you hear
a click sound, touch the stone
just long enough to allow the
tester to indicate a reading (1 or 2
seconds) and then take the probe
tip away from the stone.
10. Testing Loose Stones: Place
the loose stone in the supplied
aluminum loose stone testing
plate positioned with the culet
facing down into the recessed
hole part of the testing plate.
Then hold the testing plate
steady with one hand, as this
will also allow the electrical
current to pass through your
body, permitting the tester to
FLUORESCING STONE
J
TESTING A MOUNTED STONE
K
HOW TO PROPERLY HOLD THE TESTER
I

GEMORO PRO-M 3 18 19
function as designed and test
properly. While holding the
PRO-M 3 in your other hand,
firmly touch the probe tip to the
loose stone’s table until the test
result it indicated L. YOU MUST
FOLLOW THIS PROCEDURE
WHEN TESTING LOOSE STONES
OR THE TESTER MAY NOT TEST
CORRECTLY. DO NOT ATTEMPT
TO TEST LOOSE STONES
WHILE HOLDING THEM IN
YOUR FINGERS OR THE TESTER
MAY NOT TEST CORRECTLY.
11 . The probe tip must be cleaned
routinely to ensure proper
contact with the stone being
tested. To clean the probe tip,
take a piece of uncoated white
copy or printing paper and
lay it on a table or counter or
other flat surface. Place the
tester in a 90-degree angle
to the paper with the probe
tip lightly touching the paper.
Apply enough pressure to gently
depress the retractable probe tip
slightly inside the housing. Then
carefully rub the probe tip in one
direction on the paper to clean it.
12. Using the Optional UltraDock 3:
Place the charging station in a
convenient location near where
it will be used such as on a desk,
showcase or repair area. Take
the testers micro-USB power
cord and plug it into the rear of
the UltraDock 3, while plugging
the USB into its AC power cube
adapter. Plug the adapter into a
convenient wall outlet. You may
now simply place the PRO-M 3 in
the charging stations cradle with
its on bottom edge facing down,
and the rear of the PRO-M 3
facing the back end of the cradle.
The PRO-M 3 will automatically
have its NiMH batteries charged
while in the UltraDock 3. M
13. Using the Optional Test Stone
Magnifier: Insert the PRO-M 3’s
probe tip cone through the wider
opening of the magnifiers oval
shaped bracket and clip it into
place. Depending on whether
you are right or left handed,
you may conveniently position
it on either side of the tester.
Pivot the hinged magnifier so
that it is positioned in front of
the testers probe tip. You may
now view the stones you are
testing under magnification. N
TESTING LOOSE STONES WITH
TESTING PLATE
L
TESTER IN OPTIONAL ULTRADOCK 3
M

GEMORO PRO-M 3 20 21
MAINTENANCE
1. The PRO-M 3 is not user
serviceable other than battery
replacement, probe tip cleaning,
and recalibration. If service is
required, please contact your
supplier or the factory. Any other
attempt to repair the tester by
a user will void the warranty.
2. Always replace the protective
probe tip cap to keep the probe
tip from becoming damaged.
3. If using alkaline batteries, always
replace the batteries after long
periods of time to prevent
premature corrosion or battery
leakage, which is common with
old or spent alkaline batteries
after a period of time. Be aware
that damage to the PRO-M 3 may
occur if there is battery leakage
and it will void the warranty.
4. In the event the PRO-M 3
is not used for an extended
period of time, the batteries
should be removed.
5. Routinely clean the probe tip.
6. The PRO-M 3 is not user
serviceable other than battery
replacement, probe tip cleaning,
and recalibration. If service is
required, please contact your
supplier or the factory. Any other
attempt to repair the tester by
a user will void the warranty.
HELPFUL SUGGESTIONS
1. If substituting alkaline batteries
for the NiMH rechargeable
batteries, only use high-quality
AAA alkaline batteries.
2. The PRO-M 3 is designed to be
able to easily test faceted or
rough stones of virtually all sizes.
3. The PRO-M 3 has been precision
calibrated at the factory and will
provide years of trouble-free
use. If after using the PRO-M
3 you encounter issues with it
performance or functionality,
please contact the factory for
troubleshooting instructions
and corrective measures.
HOW TO REMOVE THE MAGNIFIER
HOW TO USE THE MAGNIFIER
N

GEMORO PRO-M 3 22 23
WARRANTY
Congratulations on your purchase
of the GemOro® PRO-M 3! Your
PRO-M 3 features a 2-YEAR PROBE
TIP and BATTERY WARRANTY plus
a LIFETIME LIMITED WARRANTY
on the electronics within the
tester. Damage caused by abuse
will void the warranty. These
warranties become effective from
the date of the original purchase
assuming the purchaser fills out the
WARRANTY REGISTRATION FORM
at www.gemoroproducts.com/
warrantyregistration or the purchaser
provides a copy of their invoice (bill
of sale) when making a warranty
claim. In the event the tester’s owner
has not registered their tester or
provided a copy of their invoice for
when they purchased the PRO-M 3,
warranty service will be determined
by the serial number tracking system
as interpreted by the factory. In
the event the PRO-M 3 is no longer
available or has been discontinued
and warranty coverage is applicable,
at the factory’s sole discretion, an
equivalent tester may be substituted
for the defective PRO-M 3. The
purchaser shall incur the cost for
postage, insurance, and handling
for all warranty and non-warranty
repairs. Warranty repairs and/or
replacements will be shipped back to
the customer FOB Destination to the
location of the customer’s choosing if
within the continental United States.
Non-warranty repairs will be shipped
back to the customer FOB Factory.
Should the customer require the
repair and/or replacement unit(s) to
be shipped outside the continental
United States, the customer will be
required to pay any related shipping
charges and any related taxes /
duties for the respective destination
country, regardless of whether it is
a warranty or non-warranty claim.

GemOro Superior Instruments
10455 Olympic Drive
Dallas, Texas 75220 USA
214.351.0380 or 800.527.0719
214.351.1903 or 800.832.9871 FAX
[e-mail]
www.gemoroproducts.com/
warrantyregistration
www.gemoroproducts.com
©2018 SKS, Inc.