Dymond Electronic Touchstone ET18 Istruzioni - Pagina 2

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Testing for Gold Plate

Introduction:

Probably most of the gold plated items referred to as "costume jewelry" or "fashion

jewelry" contain gold at the surface which is no thicker than eight millionths of an

inch. Such a gold plate is referred to as gold flash. A large percentage of gold flash

is sufficiently thin and or porous (microscopically) that the ET18 gold tester will read

through the plate and indicate "NOT GOLD". A thicker plate will read as karat gold

unless a portion of the surface being tested is erased with the eraser pencil or filed to

expose the metal underneath. The eraser should be used as first choice since it is

easier to use and non-destructive. However, the eraser will not work on thick gold

plate.

General description of procedure

To determine that an item is gold plated, the user of the ET18 gold tester must take at

least two different readings, one reading of a surface which has not been erased or

filed. The reading of the erased or filed surface will be lower if the metal underneath

is not gold. To be sure the metal underneath is not palladium, see the section on

testing for palladium. The sufficient area of non-gold is exposed to the liquid but the

unerased or unfilled gold plate exposed to the liquid does have some effect on the

reading; that is why point 2 of the following section under precautions is important.

When testing for heavy gold plate, it may be necessary to use a fast drying lacquer or

material such as a clear fingernail polish. The area to be tested must be coated with

the lacquer and allowed to dry. Next make a file mark in the center of the coating

deep enough to expose the base metal. Then test the exposed base metal with the

ET18 gold tester. Do not allow the liquid to touch any part of the gold that has not

been coated.

Testing for palladium

Both palladium and platinum will indicate karat gold if tested. Platinum jewelry is

usually traded at a higher price than gold jewelry, so platinum is seldom marketed as

gold. Palladium, however, is one-quarter to one-third the price of pure gold, so it

should be noted that pure palladium may read as medium karat gold. Palladium

prong settings are sometimes soldered into diamond solitaire white gold rings. If

palladium is suspected, it is easily distinguished from gold as nitric acid will quickly

turn palladium dark. Gold is not affected in this way.

Low Battery

If the NOT GOLD light does not come on or goes off during testing, the battery must

be replaced. Replace the battery by removing the rubber feet on the rear of the case.

Then remove the four screws under the feet. Open the case and replace the 9V

battery. Be careful not to pinch any wire when replacing the rear cover.

Cleaning the Test Well

The most important step to consistently have accurate results using your gold tester,

is the cleaning of the, "Well & Clip". The eraser stick has been removed from the

unit. In its' place is a standard "Q-Tip", which is to be used for the cleaning of the

well. Do your test as normal, when the test is complete or changing chemical

solution use one end of the Q-Tip to absorb the chemical, then use the other end to

remove any remaining residue. Dispose of the Q-Tip when complete. Never leave

any chemical solution in the well when not testing. If any chemical happens to

come in contact with the clip, clean immediately with a clean paper towel.

Warranty

Dymond, Inc. provides that each ET18 gold tester system to be free from defects in

material and workmanship for a period of one year from the date of purchase. This

warranty becomes void by:

(1) Unauthorized repair, misuse, modification, alteration, tampering, or

breaking any factory seal.

(2) Accidental damage, neglect, or improper use.

Batteries and chemicals are not included in the warranty.

Dymond, Inc. shall not be held legally liable or responsible for any error in

determining the gold content of any object using the ET18 gold tester.

Electrolyte Kit

Replacement of the ET18 Electrolyte and Activator kit can be obtained from your

dealer or distributor. Operating temperature is 65ºF to 90ºF.

For technical assistance, please call:

Dymond, Inc.

3307 Industrial 25

Street

Fort Pierce, FL 34946.

Phone (772) 429-0045

Fax (772) 429-0170