PRESIDIUM Synthetic Diamond Screener II Instruction Manual

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Language Contents
Language
1. English
2. Chinese
3. French
4. German
5. Italian
6. Russian
7. Spanish
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Contents
English Version
I. Disclaimers, Exclusions and Limitations of Liability
II. About this book
III. About Presidium Synthetic Diamond Screener II
IV. Important Notice
1. GETTING STARTED with your Synthetic Diamond
Screener II
2. PERFORMING A TEST with your Synthetic Diamond
Screener II
3. READING TEST RESULTS on your Synthetic Diamond
Screener II
4. OVERVIEW OF BUTTONS & INDICATORS on your
Synthetic Diamond Screener II
5. TAKING CARE of your Synthetic Diamond Screener II
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I. Disclaimers, Exclusions and Limitations
of Liability
PLEASE READ AND NOTE PRESIDIUM WARRANTY TERMS AND
CONDITIONS as stated in the warranty card. Presidium warranty for
its devices are subject to proper use by its users in accordance with all
the terms and conditions as stated in the relevant user handbook and
shall cover only manufacturing defects.
Due to continuous product improvement, Presidium reserves the right
to revise all documents including the right to make changes to the
handbook without notice and without obligation to notify any person
of such revisions or changes. Users are advised to check Presidium’s
website from time to time http://www.presidium.com.sg/
Presidium shall not be responsible for any damage or loss resulting
from the use of this product or handbook.
Under no circumstances shall Presidium, its manufacturer or any of
its subsidiaries, licensors, distributors, reseller, servant and/or agent
be liable for any direct or indirect damages, resulting from the use of
this device.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW,
under no circumstances shall Presidium, its manufacturer or any
of its subsidiaries, licensors, distributors, reseller, servant and/or
agent be responsible for any special, incidental, consequential or
indirect damages howsoever caused.
The Synthetic Diamond Screener II (“SDS II”) by Presidium in this
handbook is provided and/or sold on an “as is” basis. Except as
required by applicable law, no warranties of any kind expressed
or implied, including, but not limited to, the implied warranties of
merchantability and tness for a particular purpose.

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II. About this Book
Thank you for purchasing the Synthetic Diamond Screener II by
Presidium (“SDS II” or “Device”).
This handbook is designed to help you set up your device and
describes all you need to know about how to use your diamond
screening device accurately and take care of it, in line with its
requirements. Please read these instructions carefully and keep them
handy for future reference.
This book also contains the terms and conditions in relation to
the use of the device including the Disclaimer, EXCLUSION and
Limitation of Liability clauses stated above in Section I.
III. About Presidium Synthetic Diamond
Screener II (SDS II)
The Synthetic Diamond Screener II (SDS II) is developed to help
screen out the Type IIa colorless diamond, which could possibly be
synthetic, from the natural Type Ia colorless diamond.
Diamonds can be classied into two Types.
Typically, Type I diamonds contain nitrogen atoms as the main
impurity and these diamonds make up almost 98% of all natural
diamonds. The usual color of Type I diamond is colorless, brown,
yellow or orange but can also be virtually any color other than blue.
Type II diamonds, however, contain few or undetectable nitrogen
atoms and they make up the remaining 2% of natural diamonds.1
Within the Type II category of diamonds, they can be further classied
as Type IIa and Type IIb. Type IIa diamonds are usually the purest of
color ranging from colorless to near colorless, although they can also
be of yellow, brown, orange, pink, red or purple colour. Type IIb are
typically not colorless and are usually blue, brown or gray and contain
boron atoms as well.
1 Diamond Grading ABC The Manual. 9th edition, 2007, Verena Pagel-Theisen G.G.
F.G.A

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Currently, known synthetic colorless diamonds are generally Type IIa
diamonds i.e. colorless diamonds without any detectable presence of
nitrogen atoms. Type IIa colorless synthetic diamonds can be grown
either using chemical vapor deposition (CVD) synthesis or
High Pressure High Temperature (HPHT) synthesis, or can be HPHT-
treated CVD diamond.
This device helps to identify the Type IIa colorless diamond, which
may be a synthetic diamond, but does not distinguish between the
various processes through which the synthetic diamond may be grown
or treated.
When subjected to deep UV irradiation, Type Ia and Type IIa
diamonds absorb different amounts of UV light and this difference
in the light absorption is signicant enough to aid in differentiating
between Type Ia and Type IIa colorless diamonds.
The SDS II is developed and designed based on this principle. Type
IIa diamonds allow more deep UV light to pass through and thus its
UV light absorption ability is lower.
This device, meant only for use on colorless diamonds (Color D to
J), features a safe, user-activated, deep-wave UV light source that
passes through the tested stone towards the photo-detector on
the base platform inside the product. Bars of colored lights on the
front of the lid will provide an easy reading to indicate if the UV light
absorption ability of the tested stone is low (i.e. indicative of a Type IIa
diamond) or high (indicative of a natural diamond).
If the UV light absorption measurement is low, a single red light
bar will light up alerting the tested stone is a Type IIa diamond,
which could be synthetic and therefore should be subjected to other
supporting tests.
If the UV light absorption measurement is high, a single blue light bar
will light up, indicating that the UV light absorption of the tested stone
corresponds to the usual absorption range characteristic of a Type I
colorless natural diamond.
Created with the user in mind, the Synthetic Diamond Screener II
is designed to be a lightweight, portable, sturdy and non-slip unit
that can be powered by 4 AAA batteries or through its USB port that
connects to either an external power source or to the Presidium
Universal Power Adaptor.

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The device was designed with the following objectives:
• Aid to alert to the possibility of Type IIa synthetic diamond
• Help in quickly screening out natural Type I colorless (From D to J
color) diamond (the most common type of natural diamond) from
Type IIa colorless diamond which is usually synthetic diamond
• Provide consistent and reliable test results under proper use and
understanding of its functions
• Feature user-safe materials and user-friendly ergonomics that
gives clear visibility of results, maximum sturdiness and grip, ease
of use and portability
The capabilities of the Synthetic Diamond Screener II are as
follows:
• Test on diamonds within a range of dimension from 1.5 mm in width
and up to 5 mm in height. (approx. 0.02 to 10 carat size)
• Test on polished stones of common shapes such as round cut,
oval cut, princess cut, brilliant round cut, emerald cut, baguette cut,
square brilliant cut, step cut and mixed cut
• Can be used on both loose stones and mounted stones jewellery
with open-back setting
• Fast testing time of 2 seconds
The user is cautioned against using the Synthetic Diamond
Screener II on the following as it may affect the accuracy of the
readings:
× Stones that are more than 5 mm in height as the specic UV
wavelength has limited ray reach
× Diamond of colors other than colorless (D to J)
× Testing to identify other forms of diamond simulants i.e., moissanite,
cubic zirconia, etc are not possible
The SDS II features the following:
• 2 color coded (blue/red) indicator light bars to give clear results of
Natural Type I Diamond and Type IIa Diamond
• Test button will blink in red to alert if the device is unable to detect
any stone on the photo-detector
• Exterior base rubber padding to ensure non-slip sturdiness and
prevent scratches to surfaces
• Streamlined ergonomic design that enhances portability and stability
• Exterior USB port at back of unit for connecting to external power
source
• International voltage compatibility
• Low battery indicator
• USB power

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The interior testing area of SDS II features:
• UV light source pre-set at a safe and optimum wavelength to
accurately measure the UV absorption ability of stones
• Crosshair marking on the probe as guide for positioning rings
• Blue light to illuminate the testing pad
• Light-sensitive photo detector in the center of base platform to
detect the amount of light that is able to pass through the stone
• Anti-slip platform to hold the stone in place
• A 5mm metal bar to conveniently raise the test probe for successive
testing on loose stones
Included in your package:
• Presidium Synthetic Diamond Screener II unit
• Protective carrying case with interior pouch for gemstones and
accessories
• 5mm metal bar
• USB cable
• Presidium Universal Power Adaptor
• User handbook
• Warranty card

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Fig.A Synthetic Diamond Screener II Unit
Features/Functions (Fig.A)
1. Power button (On/Off and Low Battery Indicator)
2. Lid
3. Anti-slip platform with concentric markings to ensure correct
placement of stone
4. A 5mm metal bar to conveniently raise the test probe for
successive testing on loose stones
5. Photo-detector
6. UV light source with crosshair marking as ring guide embossed
on top and light pointer
7. Lever to adjust the light source
8. “Start Test” button
9. Two indicator lights labelled “Natural” and “Type IIa Diamond”
10. Micro USB port

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IV. Important notice
• Before testing, ensure that your gemstone is a diamond and not
a diamond simulant (moissanite, cubic zirconia or other colorless
stones).
• Keep the device dry. Precipitation and all types of liquids or
moisture can contain minerals that will corrode electronic circuits. If
your device gets wet, remove the battery and allow the device to dry
completely before replacing it.
• Do not use, store or expose the device in dusty, dirty areas. Its
moving parts and electronic component may get damaged.
• Do not use, store or expose the device in hot areas. High
temperatures can damage or shorten the life of the device, damage
batteries, and warp or melt certain plastics.
• Do not use, store or expose the device in cold areas. When the
device returns to its normal temperature, moisture can form inside
the device and damage electronic circuit boards.
• Do not attempt to open the device other than as instructed in this
handbook.
• Do not drop, knock, or shake the device. Rough handling may break
internal circuit boards and ne mechanics.
• Do not use harsh chemicals, cleaning solvents, or strong detergents
to clean the device.
• Do not paint the device. Paint can clog the moving parts and prevent
proper operation.
If the device is not working properly, kindly contact Presidium
Customer Service at [email protected] or:
Presidium Instruments Pte Ltd
Unit 7, 207 Henderson Road
Singapore 159550
Attn: Customer Service Executive

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1. Getting started with your
Synthetic Diamond Screener II
1.1 Powering up your device
The Synthetic Diamond Screener II can be powered by batteries
or an external power source through the USB cable connected to
the Presidium Universal Power Adaptor (both are included in the
packaging)
If batteries are used, you can locate the battery compartment at the
bottom of the unit. Release the two catches on the battery cover and
remove the battery cover to reveal the battery compartment. (Fig 1.1)
4 AAA batteries are needed to power the device. Do take note of the
positive (+) and negative (-) directions of the batteries when inserting
them into device. The use of alkaline batteries is recommended as it
should generally allow for approximately 2400 tests.
Fig.1.1 Removing the battery covers to
reveal the battery well

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If an external power source is used, insert the provided micro USB
cable to the port located at the back of the device (Fig 1.2) and the
other end to the provided Presidium Universal Power Adaptor for
connection to an external power socket.
You may also connect the other end of the USB cable directly to an
external power source (e.g. computer, laptop, etc).
It is recommended you use only the USB cable and the Presidium
Universal Power Adaptor provided with your product.
Fig.1.2 Plug the micro USB into the port
located at the back of the device

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1.2 Switching on your device
To switch on your Synthetic Diamond Screener II, press and hold the
Power button located at the front of the unit. A blue light will blink for
approximately 4 seconds to allow the product to warm up. (Fig 1.3)
Once the blue light stops blinking and remains stable, the device is
ready for use.
Fig.1.3 Switch on Synthetic Diamond Screener II
with the Power button

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1.3 Switching off your device and
Power-Saving Auto-Off
To switch off your Synthetic Diamond Screener II, press and hold the
Power button for approximately 2 seconds until the light goes off.
To ensure that your Synthetic Diamond Screener II conserves power,
the unit will automatically switch off 10 minutes after the last activity.
1.4 Low Battery Indicator
When the battery is too low for the device to function, the Power
button light will blink red. (Fig 1.4)
Fig.1.4 Low Battery Indicator in Red Light
shown on Power Button

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When the Low Battery Indicator turns red, the device is not able to
conduct any more tests and the UV light source inside the device will
not be able to switch on.
Replace the batteries or switch power source when it is necessary.
Battery Information
Do not leave worn out batteries in the battery compartment as the
batteries may corrode or leak, and damage the circuitry of the device.
It is recommended that batteries should be removed when the device
is expected to be stored for an extended period of time.
Batteries do not have to be removed from the unit when the Presidium
Power Universal Adaptor is used through the USB cable.

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2. Performing a test with your
Synthetic Diamond Screener II
The Synthetic Diamond Screener II works accurately with known
colorless diamonds of color D to J. You should ascertain if your stone
is a diamond rst, before using this device.
Use the nger grips on the front of the lid to lift the lid and access the
interior testing area. (Fig 2.1)
Fig.2.1 Lift the lid of the device using the
nger grips on the front

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Testing is performed under the lid of the Synthetic Diamond
Screener II where a testing area is marked by a hole in the center and
a protruding overhead UV light source (Fig 2.2). The stone is placed
covering this hole and testing begins when the lid is closed and the
“Start Test” button is pressed. Results will be displayed from the
adjacent light bars within 2 seconds upon testing.
Fig.2.2 The interior testing area inside the device
The following instructions will guide you through testing loose diamond
and mounted diamond.

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2.1 For testing on loose diamond
Ensure your loose diamond stone is wide enough to cover the
testing area. It should be approximately 1.5 mm in width. Your
diamond should also not exceed 5 mm in height to ensure that the
UV wavelength transmitted by the UV light source can be accurately
measured.
Place the diamond stone over the testing area (Fig 2.3).
The table of the stone should be placed face-down on the testing
area. Ensure that the testing area is completely covered by the
diamond so that the emitted wavelength will pass through the stone
material and not erroneously through other material which can then
give an inaccurate reading of the UV light absorption ability of the
diamond.
Fig.2.3 Location of the loose diamond
over the testing area

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Fig.2.6 Wrong position
Release the lever to lower the UV light source and secure the
diamond in place for testing. (Fig 2.4)
Fig.2.4 Adjust the UV light source with lever
to secure the diamond in place
Fig.2.5 Correct position
If you are testing multiple loose stones, use the metal bar provided
to hold the light source in place so that you do not need to keep
adjusting the lever in order to position the loose stones (Fig 2.5).
It is not necessary for the light source to touch the stone for the
testing to be carried out. (Fig 2.6)

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2.2 For mounted diamonds
Ensure that the stone is set with an open-back setting, meaning you
can still see a clear view and colour of the stone when you view the
back of it and it is not obscured by the jewelry metal or other stones.
(Fig 2.7).
Fig.2.7 An example of jewelry with open-back setting
Clear and
unobstructed view
of stone through
the open-back