Tri Electronics GT-4000 Electronic Gold Tester Manual - iGem Instruments
The GT-4000 Gold Tester™ is a portable electronic device, developed by TRI Electronics Inc., for efficient and quick determenation of gold karat value (from 6 to 24 karat), and pure platinum. The GT-4000 Gold Tester also distinguishes solid gold from gold-plated items.
OPERATION PROCEDURES
The GT-4000 test set consists of a display unit which operates on two 9-volt alkaline batteries, sensor with rotary cap containing a gel cartridge, a test plate, and a tri-cable for connecting the unit to the sensor and test plate. (See diagram 1)
The following step-by-step procedure must be followed to properly perform gold tests:
1) Remove stationary/rotary cap from sensor nozzle by turning the lower LIGHT-COLORED barrel on the top of the sensor counter clockwise. Do NOT try to remove by turning the top dark-colored rotary cap as you will damage cap assembly.
2) Remove the polyethylene cap on the gel cartridge and fully insert the rectangular feed-screw end into the appropriate slot of the rotary cap. Reassemble the cap assembled and cartridge into the sensor body. (See diagram 2)
3) Turn the light-colored barrel clockwise until fully seated.
4) Turn the dark-colored barrel counter clockwise until the first drop of gel appears at the sensor nozzle.
5) Connect the black wire to the sensor plug outlet, the black and red wire connector to the display unit, and red wire to the testing plate. (See diagram 1)
6) Turn the unit "ON" by sliding ON-OFF switch on the right side of the display unit.
7) Select and clean with eraser a testing point on the object; obtain one drop of gel by turning the sensor rotary cap (dark colored barrel) counter-clockwise until gel is dispersed from sensor end. Firmly press the sensor nozzle to the pre-selected and cleaned testing point and press the "TEST" button.
NOTE: use only a small amount of gel to test. Lightly wipe off excess gel on tissue or towel before test so that only small dome of gel is present on tip of sensor. (See diagram 3). Excess gel will provide erroneous low karatage readings. It is only necessary to wet gold surface at sensor tip.
After the test, there should be a small round wet spot on the tested sample, which verifies a good contact between the sensor tip and the sample.
8) Maintain sensor in the same vertical position for approximately 4-5 seconds while the instrument indicates the numbers of the LCD display. The first test after turning the unit "ON" may give an inaccurate result due to residua/ charge and should be ignored. Repeat the operation numbers 7 and 8. Then refer to the Karat Table to convert the displayed number into karat value.
SPECIAL INSTRUCTIONS
1) Dispense and dispose a drop of the gel before each test to eliminate residual charge in sensor.
2) Do not allow gel to touch alligator clip during test.
3) Some flat herringbone gold chains require a special cleaning technique due to special factory applied coating on the chain. To clean this coating, put a small drop of nitric acid on the test spot and then dry with a paper towel or vigorously clean with eraser. Be sure that the alligator clip and sensor nozzle have good electrical contact with test object.
4) The Gold Tester is able to distinguish between gold-plated and gold-filled items when the plating layer is less than one micron.
5) For replacement of polyethylene gel tube, call us at (858) 571-4881. Also, you may use our Order Form or call your distributor. This unit uses TRI Electronics TB-24 gel.
6) The gel may be stored at room temperature for an extended period (more than one year) (26.6°C). For unlimited storage life, the manufacturer recommends storing gel in a standard refrigerator.
(DO NOT FREEZE)
7) Do not try to open or disassemble the display unit because it will damage the electronic parts and void the manufacturer's warranty.
8) Do NOT have excess gel for testing.
9) If tested gold piece shows "Not Gold", check all connections of wires in unit, plate, and sensor. Also check for the proper amount of gel and round wet spot on the tested item.
TRI ELECTRONICS INC., WARRANTY
TRI Electronics Inc., as the manufacturer of the GT-4000 Gold Tester , believes its instrument will provide a fast and reliable method of determining the karat value of gold when used in accordance with the provided instructions. TRI Electronics Inc., warrants that each instrument is free from defects in material and workmanship for a period of two (2) years from the date of purchase. This warranty applies to a GT-4000 Gold Tester™ that is not abused or improperly used and only if the device is used in accordance with the Owner's Manual furnished by TRI Electronics Inc. This warranty does not cover: any product where an attempt to disassemble the same is established; modification; alteration; unauthorized repair or service of the product or damages or defects resulting from accident or any events beyond the control of TRI Electronics Inc., nor does this warranty cover batteries or accessories.
In addition, TRI Electronics Inc., as the manufacturer, shall not be held legally liable or responsible for any error in determining the contents of gold and other precious metals through the use of the GT-4000 Gold Tester™ nor for using the device in testing non-gold alloys or dental gold.
SERVICE
The purchaser may obtain information or assistance on the use of the GT-4000 Gold Tester™ by calling at: (858) 571-4881, or by writing to:
TRI ELECTRONICS INC.
4320 Viewridge Ave, Suite C, San Diego, CA 92123
Attn. Service Department
FAX: (858) 571-5404
