PRESIDIUM PGI Mode d’emploi

Language

1. English pg. 01

2. Chinese pg. 29

3. French pg. 57

4. German pg. 87

5. Italian pg. 117

6. Russian pg. 147

7. Spanish pg. 177

Language Contents

1 2

English Version

I. Disclaimers, Exclusions and Limitations pg. 02

of Liability

II. About this book pg. 03

III. About your Presidium Gem Indicator (PGI) pg. 04

1. GETTING STARTED with your PGI pg. 07

2. PERFORMING A TEST with your PGI pg. 12

3. READING TEST RESULTS on your PGI pg. 15

4. OTHER FUNCTIONS of your PGI pg. 21

5. CALIBRATING your PGI pg. 24

IV. IMPORTANT NOTICE pg. 28

Contents 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 testers 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.

In pursuing continuous product improvement and

enhancements, Presidium reserves the right to revise

the product software data, including the Presidium Gem

Indicator thermal conductivity and color charts, and

rmware.

New updates to software and data documents will be

made available on www.presidium.com.sg and

http://omi.presidium.com.sg

Users are strongly advised to visit http://omi.presidium.com.sg

to check for periodic relevant rmware updates.

Presidium shall not be responsible for any damage or

loss resulting from the use of this tester or handbook, and

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 tester.

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 tester or Presidium Gem Indicator (PGI) referred to in

this handbook is provided and/or sold on an “as is” basis.

Except as required by applicable law, no warranties of

any kind, either expressed or implied, including, but not

limited to, the implied warranties of merchantability and

tness for a particular purpose.

3 4

III. About your Presidium Gem Indicator (PGI)

The Presidium Gem Indicator is an enhanced and more

convenient handheld version of the Presidium Gem

Tester/Colored Stone Estimator based on the invention

of Professor Julian Goldsmid from the University of New

South Wales in Australia. It was developed to distinguish

between diamonds and other colored gemstones using

the principles of thermal conductivity.

Most colored gemstones have their individual color

and distinguishable heat conductivity properties, with

diamonds having the most exceptional heat conductivity.

The Presidium Gem Indicator probe consists of two linked

thermometers: one, which is heated electronically, while

the other is cooled by the gemstone being tested. The

difference in temperature creates an electrical output,

which is then amplied and displayed on the new digital

organic LED (OLED) display.

The Presidium Gem Indicator is further able to give

indication about the possible colored gemstone

through its color separation capability. As some colored

gemstones have similar thermal conductivity, the addition

of the color separation feature will thus be able to give

a more denitive indication about the type of colored

gemstone.

With this, the Presidium Gem Indicator is now capable

of identifying a wider range of up to 31 gemstones

compared to the previous desktop Presidium Gemstone

Tester/Colored Stone Estimator.

It is to be noted that PGI still does not distinguish between

natural and synthetic gemstones, including diamonds

against moissanites, as they have similar physical

properties (thermal conductivity and color).

The Presidium Gem Indicator has been subjected to

thorough factory quality control, and will generally give a

clear and reliable reading of the gemstone being tested

under proper use. However, you are advised to conduct

further supporting tests.

II. About this book

Thank you for purchasing the Presidium` Gem Indicator

(“PGI” or “tester” or “unit”).

This handbook is designed to help you set up your tester

and describes all you need to know about how to use

your tester 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 tester including the Disclaimer,

EXCLUSION and Limitation of Liability clauses stated

above in section I.

5 6

1 Protective Cap

2 Retractable Probe

3Replaceable Probe Tip

4 360o Textured Metal Plated Ergonomic Grip

5 Display Screen with OLED Illumination

6 Battery Lifespan Indicator

7 On/Off Button

8 USB Inlet

9 “Select” Button

10 Navigation “Up” Button

11 Navigation “Down” Button

12 Battery Compartment (beneath the lid with

Presidium wording)

Included in your package:

• Presidium Gem Indicator

• 2 pieces of Built-in Calibration disks –

Disk 1 (Gray) and Disk 2 (Black)

• USB cable

• User handbook

• Warranty card

• Protective carrying case

Fig. 1

In pursuing continuous product improvement and

enhancements, rmware within the Presidium Gem

Indicator may be periodically updated. Users are advised

to visit http://omi.presidium.com.sg from time to time

to check for relevant rmware updates, to ensure optimal

use of their product.

The Presidium Gem Indicator (PGI) features the

following:

• Thermal conductivity testing of gemstones

• Color separation function with user input

• Clear quality OLED display screen

• Industry’s thinnest probe tip (0.45mm) for testing

gemstones as small as 0.02ct

• Retractable thermoelectric tip that maintains constant

pressure between probe tip and gemstone

• Patented replaceable probe tip technology, the rst in

the industry

• Metal alert buzzer

• Fast warm-up time of 3 seconds

• Calibration disk for calibration at user’s discretion, to

ascertain accuracy

• USB connection to PC for more value-added functions

• Stylish ergonomic design

• Low battery alert

• Automatic power off after 10 minutes of inactivity

• Connectivity to complementary software platform OMI

for the latest rmware updates and usage diagnostic

support

Functions of your Presidium Gem Indicator

Your Presidium Gem Indicator has 4 functional options

on the main screen menu as follows:

Test

Settings

Calibrate

Library

You may toggle between these options using the “Up”

and “Down” buttons. To activate a function, press

“Select” when the navigation arrow on screen points to

the function.

The rest of this handbook will give further information on

how to use the various functions.

7 8

Turning on your PGI

Press and hold the [ON/OFF] button (Fig. 1.4.1) on the

tester.

“SYS CHECK” will appear on the display screen as

you wait for about 3 seconds for the tip to warm up to

programmed pre-determined tip temperature.

Take note of the positive (+) and negative (-) directions

of the batteries when inserting them into the tester (Fig.

1.3). The use of alkaline batteries is preferred as it should

generally give approximately 3 hours of continuous

operation, while the use of ordinary batteries will give a

shorter operating life.

Fig. 1.3

Fig. 1.4.1

Fig. 1.4.2

Sys Check

1. GETTING STARTED with your Presidium Gem Indicator

Powering up your PGI

This tester can be powered either through electrical

power via the Presidium Universal USB Adaptor (not

included in your package) or through the use of batteries.

If electrical power is preferred, please ensure that only

the Presidium Universal USB Adaptor is used.

Connect one end of the USB cable provided to the

Universal USB Adaptor and the other end to the USB inlet

on the unit (Fig.1.1).

If batteries are preferred, please use 3x AAA batteries.

The use of alkaline batteries is recommended as it should

generally give approximately 3 hours of continuous

operation, while the use of ordinary batteries will give a

shorter operating life.

Remove the battery cover lid on the side of the tester.

This is the side of the tester with the Presidium logo

wording on the top (Fig 1.2).

Fig. 1.1

Fig. 1.2

9 10

Fig. 1.5b

Fig. 1.6

Gently rub the table of the gemstone against the tissue/

jewelry cloth (Fig. 1.5b).

If your stone is mounted in jewelry, please carefully clean

the stone (Fig 1.6).

Operating Conditions

The gemstone should be clean and dry before testing.

Elaborate cleaning procedures are not normally

necessary.

Recommended Normal Operating Conditions

The recommended testing temperature is between

23°C – 27°C or 73°F – 80°F. Please allow the gemstone

or jewelry piece to adjust to room temperature prior to

testing. Exposure and/or operating the tester outside the

recommended testing temperatures will affect the result

and performance of the tester.

Operating under Extreme Conditions

In the event that testing is done outside the recommended

operating conditions, the tester must rst be calibrated

under the same temperature setting as the testing site.

Please refer to Section 5 of this handbook for calibration

procedure. This calibration is done to ensure the accuracy

and consistency of the testing results.

However please note that the temperature conditions

should be kept between 20°C to 33°C.

An “Error” message will appear if “SYS CHECK” fails

(Fig 1.4.3). The error can be due to the following reasons:

1. The tip is not connected properly.

2. A new tip has been inserted and its settings are

different as it has not been properly calibrated.

3. There are broken pin connections within the unit or

the tip has been damaged.

In such situations, it is recommended for you to remove,

re-insert and recalibrate the tip. If the error persists,

please contact Presidium.

Fig. 1.4.3

Fig. 1.5a

Cleaning of gemstone prior to testing

Prepare a clean tissue or jewelry cloth. Carefully retrieve

the gemstone with tweezers and place the gemstone face

down on its table facet. (Fig 1.5a)

11 12

> Test

Settings

Calibrate

Library

Toggle the navigation and Select “Test” to begin testing

(Fig 2.1)

When prompted on the screen, depress the probe tip

against the gemstone for about 5 seconds. Testing will

begin. You will need the hold the tester in this position till

the testing bar on the screen is completed (Fig 2.2).

You will be prompted to Select “Color” to enable the color

separation function, thereby narrowing down the possible

results.

Note: If you have disabled the Color function (see Section

4 Fig. 4.2), you will not be prompted to input Color.

However, once the results have been displayed, you can

still Select Color to narrow down the possible results.

Fig. 2.1

Fig. 2.2

2. PERFORMING A TEST with your Presidium Gem Indicator

Battery Information

Battery life is indicated by the icon at the top right-hand

corner of the display screen.

Note: The power-saving feature will ensure the tester

shuts down automatically after 10 minutes of inactivity.

Do not leave worn out batteries in the battery compartment

as the batteries may corrode or leak and damage the

circuitry of tester. Batteries should be removed when

the instrument is expected to be stored for an extended

period of time.

Batteries do not have to be removed when the electrical

power via a power adaptor is used.

4 Bars Battery life is at least 75% or full 100%.

Tester may be used as indicated.

3 Bars Tester may be used as indicated.

2 Bars Battery life is about 25 – 50%. Tester is still

usable but it is recommended for the user

to recalibrate the tester at this stage.

1 Bar Battery life is low at about 0 – 25%. No test

should be performed. It is recommended

for the user to change to new batteries.

Fig. 1.7

13 14

The probe tip must be placed at a right angle or

perpendicular to the facet of the gemstone for an

accurate reading.

Tests should be conducted on the table of the gemstone.

In the event of any doubt, you may also test on the girdle

of the gemstone.

For proper operation of the tester, ngers must be placed

on the metal grip at all times.

To achieve optimum test accuracy involving very small

mounted gemstones (1.22mm exposed diameter and

below), it is extremely important that no contact is made

on any metal/jewelry setting part of the jewelry.

To achieve optimum test accuracy involving very small

gemstones (10 points and below), it is important to allow

the gemstone to cool down for 5-10 seconds in between

tests.

It is advisable to conduct multiple tests on different points

on the gemstone as thermal conductivities may differ

slightly along different crystal axes of the gemstone.

Cleaning of probe tip

Please note that if the tester is being used for the rst

time, or if the tester has not been used for more than a

week, it is advisable to clean the probe tip using a piece

of paper.

A clean probe tip helps to attain consistent and accurate

readings.

To clean the probe tip,

• Ensure the unit is switched off.

• Hold the probe pen with the pen tip forming right-

angle (90-degree) with any paper or stone rest.

Gently move in circular motion without retracting the

tip (Fig. 2.5).

• Repeat the same motion several times. The cleaning

process is completed and the tester is now ready for

use.

Fig. 2.5

Note: Care should be taken when testing mounted

jewelry. Users must ensure that the stones are securely

mounted before conducting the test as the gap between

the stone and setting might lead to an inaccurate reading.

For loose gemstones:

Hold the gemstone with one hand while holding the tester

with the other hand (Fig. 2.4).

Fig. 2.4

Fig. 2.3

For mounted jewelry or gemstones:

Hold the jewelry or mounted gemstone with one hand and

the tester with the other hand (Fig. 2.3).

For proper operation of the tester, the thumb and index

nger must always be placed on the metal grip of the

tester.

Press the probe tip of the tester against the gemstone.

Ensure the tip is fully depressed for consistent pressure

between the tip and the gemstone.

15 16

“Metal Detect” will display on the screen and an audible

sound is emitted (if ‘Sound” is enabled at Settings) if the

probe tip touches metal or conductive material. (Fig. 3.2)

PGI can test for up to 31 types of gemstones and their

ranges of individual thermal conductivity readings based

on the analog to digital (ADC) values are illustrated in Fig

3.3 on the next page.

In pursuing continuous product improvement and

enhancements, Presidium reserves the right to revise

the product software data, including the Presidium Gem

Indicator thermal conductivity and color charts.

New updates to software and data documents will be

made available on www.presidium.com.sg and

http://omi.presidium.com.sg

Users are advised to periodically check and download

any available new software from

http://omi.presidium.com.sg.

Fig. 3.2

3. READING TEST RESULTS on your Presidium Gem Indicator

Based on the test and color input selected for the tested

gemstone, the possible types of gemstone will be

displayed on the LED screen (Fig. 3.1).

If you have disabled the Color input function in Settings,

the tester will indicate the Results based only on thermal

conductivity.

You may still input Color at this stage by going to the

Color option in Results menu (See Fig. 3.1e).

Fig. 3.1a

Fig. 3.1c

Fig. 3.1e

Fig. 3.1b

Fig. 3.d

Fig. 3.1 (a), (b), (c), (d) & (e) illustrate the

steps and results after testing

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