YEHUDA Dr. Watson User manual

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YEHUDA USER MANUALYEHUDA USER MANUAL
Dr. Watson, Sherlock Holmes 4.0 & Big Sherlock
(The following instructions are applicable for all 3 models, while some are model specic.)
As a leader in this eld, YEHUDA is well known around the world for offering the most reliable
protection available for jewelry professionals, and we’re pleased you have joined our family of happy
customers.
Our goal at YEHUDA is to continuously bring you the latest advancements and tools we’ve developed
so you can benet the most from our technology. As such, our YEHUDA app is regularly being
enhanced and updated, so we urge you to periodically go to www.yehuda.com and download the
newest version of our User Manual.
The YEHUDA detectors can detect CVD and HPHT lab grown diamonds that are loose, mounted in
jewelry, as well as parcels, and any size melee. Loose diamonds can be tested while in a thin plastic
bag. They cannot be tested if covered by a thick plastic or glass.
Our detectors are designed to detect only white diamonds within the D- K color range. Lower color
diamonds and fancy color diamonds should not be tested with our devices.
Diamond simulants including CZ, moissanite, diamond coated CZ and diamond coated moissanite can
easily be detected when they are tested loose.
Please visit our website www.yehuda.com where you can nd helpful instructional videos on how to
use the detectors and our most updated User Manual.
CONGRATULATIONS ON YOUR PURCHASE OF CONGRATULATIONS ON YOUR PURCHASE OF
A YEHUDA LAB GROWN DIAMOND DETECTOR! A YEHUDA LAB GROWN DIAMOND DETECTOR!
IMPORTANT - PLEASE WATCH OUR INSTRUCTIONAL VIDEOS:
It is our opinion that if you did not watch the instructional videos,
you may make mistakes interpreting the results.
IMPORTANT – PLEASE READ:
Terms of Use and our Privacy Policy. You can nd these on our website,
www.yehuda.com and within the YEHUDA App.

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After receiving your new detector, please do the following:
1 – 1.5”x2.5” loose
stone sorting tray
1 – 1.5”x2.5” loose
stone tray with
sections
1 – Slotted ring holder
accommodates up
to 8 rings
1 – Focusing height
adjustment adapter
1 – USB charging cable
2 – Loose stone sorting
trays 1.5”x2.5” and 4”x5”
2 – Loose stone trays with
sections 1.5”x2.5” and 4”x5”
2 – Magnetic nger ring
holders
1 – Slotted ring holder tray
(holds up to 27 rings)
1 – Worldwide power supply
110-240V
1 – FREE tablet for testing
2 – Loose stone sorting trays
1.5”x2.5” and 4.5”x5″
2 – Loose stone trays with
sections 1.5”x2.5” and 4”x5”
1 – Tray with 5 magnetic nger
ring holders
2 – Slotted ring holder trays
(each holds up to 108 rings)
1 – USB data cable for the tablet
1 – Worldwide power supply
100-240V
There are 3 types of users:
1. Go to the App Store or Google Play and search for “Yehuda Detect” or
“Sherlock Holmes Detect”
2. Download the YEHUDA app and install it.
3. Follow the instructions to register, add payment information, add users, and then
connect your device via Bluetooth to the box in order to start using your YEHUDA detector.
1. Admins - The admin is the person responsible for opening up the account. They will be
the only one that can handle payments and payment information. The admin can invite
other users (Admins, Managers and regular Users) to join. Admins are able to see all
aspects of the app. The Admin also controls the cloud settings.
2. Managers - Managers can invite other Managers or regular Users and can see the
business information but cannot see the payment information.
3. Users - A user can perform tests, check out saved tests and export tests.
Note: All types of users can perform tests, check the history of saved tests and export tests.
INCLUDED ACCESSORIES:INCLUDED ACCESSORIES:
DR WATSONDR WATSON BIG SHERLOCKBIG SHERLOCK
SHERLOCK SHERLOCK
HOLMES 4.0HOLMES 4.0
YEHUDA DETECTYEHUDA DETECT

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1 – FREE tablet for testing
2 – Loose stone sorting trays
1.5”x2.5” and 4.5”x5″
2 – Loose stone trays with
sections 1.5”x2.5” and 4”x5”
1 – Tray with 5 magnetic nger
ring holders
2 – Slotted ring holder trays
(each holds up to 108 rings)
1 – USB data cable for the tablet
1 – Worldwide power supply
100-240V
ON/OFF:
At the back of the detector you will nd the ON/OFF power button. In order to turn the box ON or OFF,
please press and hold the button for 3 seconds. An LED indicator at the front of the box will show when it
is ON or OFF. The battery powered Dr. Watson will automatically power down by itself after 5 minutes of
being idle.
Dr. Watson Charging Instructions:
In order to charge the battery in the Dr. Watson, simply connect the USB cable to it in the same way
you would charge your mobile phone. To fully charge its battery, keep it plugged in overnight. In your
YEHUDA app you will see a battery indicator that will advise you when it needs recharging. The Dr.
Watson may be used while charging. A full charge should provide about 2 weeks of operation.
Warranty:
YEHUDA detectors feature a full ONE YEAR WARRANTY under normal use. Opening the detectors body
or tampering with any of the screws will void the warranty, and result in the factory’s refusal to repair
the detector. The warranty does not cover user abuse, water damage, being hit, dropped or any other
type of improper care. The purchaser shall incur the cost for shipping, insurance, and handling for all
warranty and non-warranty repairs. Warranty repairs will be shipped back FOB Destination. The tablet
provided with the Big Sherlock is not covered under this warranty. Within the rst month of registering
your detector you have the option of purchasing an extended warranty. If you would like to purchase an
extended warranty, this must be done through the YEHUDA app.
HOW TO RUN A TESTHOW TO RUN A TEST
After you have completed your registration, connect your phone to your detector to start the test.
Please follow these steps:
Congratulations! You have just completed your rst test.
To run a new test, tap the orange button located at the bottom left of the screen.
To add more les tap “Continue”, then you can continue to save the results to your cloud.
To log into your cloud account go to Cloud.Yehuda.com
For further information and more detailed instructions,
please visit our website for the full manual and instructional videos.
1. Make sure your phone’s Bluetooth is turned ON.
2. Hold the power button on the back of the detector for 3 seconds to power your
diamond detector on.
3. Tap “Menu” at the bottom right of your screen.
4. Tap “Connect box”
5. Tap “Scan Device-off”
(It will change to “Scan Devices-on”)
6. Tap on the corresponding Yehuda device.
7. Tap the Camera icon. A white light will appear inside your detector once the camera is
active.
8. Aim the camera at the object you wish to test, zoom in or out as necessary.
9. Focus by tapping on the screen
10. Tap “Run test”

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The proven YEHUDA detection process involves illuminating the diamonds being tested using a
proprietary lighting system and software to determine their identity. This special light causes ALL the
diamonds being tested to emit light (uoresce), while SOME diamonds will continue to emit light or
glow in the dark (phosphorescence) after our light is shut off.
UNDERSTANDING THE TEST RESULTS:
When the testing process is completed, 5 pictures will be shown:
1. RESULT - Default
2. LUV - Long UV uorescence
3. GLOWING - Phosphorescence or glowing in the dark when the light is shut off
4. COLORED - Fluorescence or glowing when illuminated
5. ORIGINAL - A picture of the goods under white light
Result Picture:
It is the default picture result that you get at the end of the test.
1. Any diamond that shines in ONLY blue color is a NATURAL DIAMOND.
2. Any diamond that shines in NON blue color or is painted in red is a LAB GROWN DIAMOND.
To fully understand the result picture please rst read about all other results and then read the
explanation in the bottom.
LUV (LONG UV) PICTURE:
The long UV test result is superior to all other results.
If in the RESULT picture a diamond is determined as a lab grown diamond but in the LUV test it is
determined as a natural diamond- THEN IT IS A NATURAL DIAMOND.
IMPORTANT DETECTION GUIDELINESIMPORTANT DETECTION GUIDELINES
(Detailed instructional videos are also available.)
IMPORTANT :
To correctly identify the stones being tested, you cannot stop and make
your determination by only looking at the RESULT picture. You MUST
also look at the LUV picture, and then the GLOWING picture. In other
words, if you did not look at all 3 of these pictures you may make a wrong
determination of a stone’s identity.
PLEASE PAY ATTENTION!
During the test procedure our special light will cause all diamonds to show
uorescence. We also test the uorescence of the diamonds under a regular
LONG UV light which, as you know, causes some diamonds to show uorescence.

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IMPORTANT DETECTION GUIDELINES IMPORTANT DETECTION GUIDELINES (CONT)(CONT)
(Detailed instructional videos are also available.)
ACCORDING TO THE SCIENCE KNOWN TODAY:
• If a diamond shines in blue in the LONG UV test results, it is a 100% NATURAL diamond.
• If a diamond shines very strongly in a non-blue color in the LUV TEST- it is a
natural diamond as well.
• If it shines in very light non blue color – it may be a natural diamond OR a lab grown diamond.
In this case the LUV TEST did not help us.
If a diamond was determined to be a natural diamond at the long UV test, it is 100% natural diamond!
Even if it gave a lab grown diamond result in the RESULT picture. This means that when you get a lab
grown diamond test result – YOU ARE NOT DONE. It is therefore critical that YOU ALWAYS CHECK
THE LONG UV PICTURE TO MAKE YOUR FINAL DETERMINATION.
GLOWING PICTURE:
Some LAB GROWN DIAMONDS show phosphorescence. (Emit light “glow” after the light source is
shut off.) If a diamond shines after the light is shut off – it is a lab grown diamond.
COLORED PICTURE:
When our proprietary lamp emits light on the diamonds, they uoresce in different colors.
ORIGINAL PICTURE:
This is the untouched picture of the diamonds and jewelry that you are testing.
RESULT PICTURE:
This is the default picture that you see when the test has been completed. It is a combination of the
COLORED picture and the GLOWING picture.
• If the diamond uoresces 100% BLUE - it is always a NATURAL diamond.
• If the diamond uoresces in any other color but blue, and/or is painted in red -
it is a LAB GROWN diamond.
• If the diamond is painted in red, even if the diamond uoresces in blue,
it is a LAB GROWN diamond.
To simplify this for you, our software identies the diamonds that glow in the dark or show
phosphorescence, and paints them in a distinctive bright red color in the RESULT picture.
Even though our software paints these diamonds red in the RESULT picture, sometimes the painting
is too strong or very light. We suggest to always go to the GLOWING picture to understand which
diamonds glow in the dark (show phosphorescence). For your convenience, at the bottom of the
RESULT picture you can change the amount of red painting by pressing the sensitivity buttons.
In order to be more accurate and reduce the false positive rate, you MUST always also look at the
LUV and GLOWING pictures before making your nal determination.
NOTE: BLACK IS NOT CONSIDERED A COLOR.

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IMPORTANT DETECTION GUIDELINES IMPORTANT DETECTION GUIDELINES (CONT)(CONT)
(Detailed instructional videos are also available.)
SIMULANTS:
Stones that do not emit light in any color (black) under our proprietary lighting are considered
simulants. (This is elaborated further in the instructional videos.)
FLASHLIGHT EFFECT:
As explained previously, NATURAL diamonds do not have phosphorescence. They will not glow in the
dark after the light is shut off except in rare occasions (false positive).
Sometimes we may see a diamond or diamonds that show a blue color that are also painted with
some red. In this case, we must be sure that there is no stone nearby the diamond that shows very
strong phosphorescence. These glowing stones could act like a ashlight and consequently illuminate
the natural diamond to the extent that it seems like it is glowing in the dark by itself. In this case, we
must take out the diamonds that are painted in full red and check again. Please see an example of this
in the picture section below.
HPHT lab grown diamonds will usually uoresce in a blue color and will show a very strong
phosphorescence. In the RESULT picture, these diamonds will usually be completely painted in a
bright red color to the extent that you will not be able to see the color of the diamond. (You can see
the color of the diamond in the COLORED result.) When viewing the GLOWING picture result you can
easily identify HPHT lab grown diamonds, since they will glow very strongly in blue.
CVD lab grown diamonds will usually uoresce in a NON-BLUE color, and they may or may not show
slight phosphorescence. In the RESULT picture it will either show a non-blue and/or some visible red
painting. When viewing the GLOWING picture result, CVD lab grown diamonds may glow. However,
the glow will be very weak as compared to the bright glow of HPHT lab grown diamonds.
IS IT A CVD OR HPHT LAB GROWN DIAMOND?IS IT A CVD OR HPHT LAB GROWN DIAMOND?
The diamonds in the pictures you are about to see in the next few pages are positioned with the table
facing down. This is done for demonstration purposes.
When testing loose diamonds, we recommend to always position them on the pavilion side as well.
A test cannot be fully done UNLESS the diamond was checked
on both the table and on the pavilion.
A PICTURE IS WORTH A THOUSAND WORDS A PICTURE IS WORTH A THOUSAND WORDS
So Please Pay Attention.

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Some natural diamond show uorescence under Long UV illumination.
(Lab grown diamonds NEVER show blue orescence under Long UV illumination.)
Natural diamonds show blue with no red painting.
RESULT PICTURES
LUV PICTURES
BLUE = NATURALBLUE = NATURAL
Natural Diamonds will shine in ONLY blue color. Any kind of blue.

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A CVD lab grown diamond may or may not have
phosphorescence. If it has phosphorescence it
will be painted in red in the RESULT picture.
Lab grown diamonds will shine in a NON blue
color and/or be fully or partially painted in red.
Phosphorescence
The following is an example of CVD lab grown diamonds which show a different
NON-BLUE color and/or blue with some red painting.
RESULT PICTURE GLOWING RESULT
CVD LAB GROWN DIAMONDSCVD LAB GROWN DIAMONDS
The HPHT lab grown diamonds in the
picture above are fully painted in red.
HPHT lab grown diamonds show very strong
phosphorescence. ALWAYS IN BLUE. The
glowing of these diamonds is converted by the
software into red painted in the RESULT picture.
RESULT PICTURE GLOWING RESULT
AN HPHT LAB GROWN DIAMONDAN HPHT LAB GROWN DIAMOND

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HPHT & CVD LAB GROWN DIAMONDS TOGETHERHPHT & CVD LAB GROWN DIAMONDS TOGETHER
HPHT and CVD lab grown diamonds do
not show any uorescence under Long
UV illumination.
HPHT lab grown diamonds show blue
uorescence but will be painted in red due to
their phosphorescence.
CVD lab grown diamonds uoresce
in non-blue colors.
All of the diamonds at the top part of this picture are
HPHT lab grown diamonds and they are fully painted in
red. The 8 diamonds at the bottom part of the picture
are CVD lab grown diamonds. They show a NON-BLUE
color and some are partially painted in red.
HPHT lab grown diamonds show very strong
phosphorescence in a blue color.
CVD lab grown diamonds show a very weak
phosphorescence or none at all.
RESULT PICTURES
GLOWING RESULT
COLORED PICTURES
LUV RESULT

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FLASHLIGHT EFFECTFLASHLIGHT EFFECT
The oval HPHT lab grown diamond above is showing very strong phosphorescence and
acts like a ashlight illuminating the natural diamonds near it. Thus some red painting
will be applied on them at the RESULT picture.
As seen above, after taking out the oval stone that acts like a ashlight,
natural diamonds do not show phosphorescence.
GLOWING PICTURES

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FLASHLIGHT EFFECTFLASHLIGHT EFFECT
The above oval is an HPHT lab grown diamond. The diamonds next to it are natural
diamonds, but they are partially painted in red. You must always take a diamond that is
fully red painted out to be sure of the results of the other diamonds.
As seen above, after taking out the OVAL stone that acts like a ashlight, there is
NO RED PAINTING - THE STONES ARE NATURAL.
RESULT PICTURES

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FLASHLIGHT EFFECTFLASHLIGHT EFFECT
Under Long UV illumination, the oval (which is an HPHT lab grown diamond) does not
show any uorescence. Some of the natural diamonds show uorescence.
As seen above, after taking out the oval stone that acts like a ashlight,
some natural diamonds show uorescence under Long UV illumination.
LUV PICTURES

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FLASHLIGHT EFFECTFLASHLIGHT EFFECT
The HPHT lab grown diamonds and NATURAL diamonds uoresce in blue. However, due
to the fact that HPHT lab grown diamonds show phosphorescence, it will be marked in
red in the RESULT picture.
As seen above, after taking out the HPHT lab grown oval diamond that acted like a ashlight,
natural diamonds show blue color under our proprietary light.
COLORED PICTURES

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These HPHT and CVD lab grown
stones show phosphorescence.
Simulants and natural diamonds
show NO phosphorescence
whatsoever.
Only the natural diamond on the
bottom right shows some blue
uorescence. Simulants and lab
grown diamond will never show
uorescence under Long UV
illumination.
SIMULANTSSIMULANTS
Non-diamonds do not show uorescence or phosphorescence at all. That means they will not emit light under our
proprietary light or under the long UV illumination. If they show any color at all, please understand that it is only a
REFLECTION. You can easily discern if the stone shines or just reects some light.
The top 2 stones are moissanite.
The 2nd row of stones are CZ.
The bottom 3 stones:
- The left one is an HPHT lab grown diamond.
- The middle one is a CVD lab grown diamond.
- The right one is a natural diamond.
RESULT AND COLORED PICTURES
COLORED PICTURE GLOWING RESULT LUV RESULT

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False positive means that a natural diamond gets a result of a lab grown diamond. It happens in about 2.5% of
natural diamond. In order to further reduce this rate we MUST check the LUV (LONG UV ) result.
If a diamond show BLUE uorescence under the LUV illumination- it is 100% natural diamond.
Here we have a result of a lab grown diamonds HOWEVER: when we go the LUV (LONG UV) result –
both diamond show blue uorescence.
That means that both are NATURAL diamonds!!!
Pay Attention: Some natural diamonds that give a false positive result will NOT shine under the Long UV illumination.
RESULT PICTURE LUV PICTURE
FALSE POSITIVEFALSE POSITIVE
The ASSURE Instrument Testing Program is an ongoing initiative of the Natural Diamond Council.
They used an independent 3rd party, Underwriters Laboratories (UL), to impartially test and verify
the effectiveness of all the CVD/HPHT detection devices submitted for a comprehensive review.
Underwriters Laboratories tested 31 different detectors. Of these, 15 were the preferable types
that could simultaneously check multiple diamonds and jewelry. Of the 15 tested, ONLY TWO were
determined to be capable of detecting 100% of all lab grown diamonds.
The two they certied as having this perfect detection rate included:
Sherlock Holmes 2.0 by YEHUDA.
SYNTHdetect by DeBeers ($18,000-$25,000)
Our new generation detectors have not yet been evaluated by Underwriters Laboratories in the
ASSURE program. However, it is important to note that these new generation YEHUDA detectors use
the IDENTICAL DETECTION WAVELENGTHS, and based upon our rigorous testing, we are condent
that their accuracy is identical to the Sherlock Holmes 2.0.
ASSURE TESTINGASSURE TESTING

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Explaining the ASSURE test results:
• The Sherlock Holmes 2.0 was veried to detect 100% of all lab grown diamonds.
• It was also found to have a false positive rate of 2.5%.
What this means for you:
If the result is that a diamond glows a blue color - it is 100% a natural diamond. Period.
You can always be 100% certain that the diamond is natural if this occurs.
If the result is a lab grown diamond, there is small (2.5%) chance that it is a natural diamond. In other
words, only 2.5 diamonds out of every 100 natural diamonds will give a result of a lab grown diamond.
This is called false positive. (With the addition of the Long UV test we have further reduced the false
positive rate.)
What this means from a practical perspective:
• If the result is that a diamond glows in a non-blue color or is painted in red, it is most likely a lab
grown diamond, since only 2.5% of all natural diamonds will give a false positive result showing a
lab grown diamond.
• Thanks to the Long UV test, we have actually reduced the 2.5% false positive results from our prior
generation models.
The bottom line is:
• When you get a natural result - it is 100% natural.
• When you get a lab grown result - there is a very small chance that it is a natural diamond.
For any problems, please visit our www.yehuda.com website and watch the video that addresses your
concern. We have created numerous short instructional videos and we are certain that you will nd
the one that will address the problem you are experiencing.
Customer support:
You can send a question through the app. Go to ‘CONTACT US”, describe the issue and send it. We
will send you an email with a solution or call you ASAP.
Phone numbers:
Israel [phone]
New York [phone]
India [phone]
Email [email protected]
Website www.yehuda.com
Sherlock Holmes Detect LTD.
16 Haharoshet street
Or Yehuda
Israel
TROUBLE SHOOTINGTROUBLE SHOOTING
ASSURE TESTING ASSURE TESTING (CONT)(CONT)