GVS Archimedes A1200 User manual

1
Weighing Platform
Frame Nacelle
Scale
Water Bubble
Level
GVS Archimedes
8.8.8.8.8.8
P S
G
Display:
GGold Mode
SSilver Mode
PPlatinum Mode
M1 Weight in air
M2 Weight in water
OValue is stable
Label:
S.C. Gold-Silver-Copper Alloy
C. Gold-Copper Alloy
(e.g. Krugerrand)
S. Gold-Silver Alloy
SG Specicweight
Buttons:
ON/OFF Turns device on/off
AUtility-button
(switch through modes)
B Conrmation-button
ENTER Save-button
ZERO Back to zero
CTechnician-button

2
GVS Archimedes
Before switching on
1. Place the GVS Archimedes on an even and stable surface.
2. Check the water level bubble and adjust the stands by turning to place the bubble
at the center.
3. Place the water tank on the scale (so that it remains stable in the grooves).
4. Carefully pour DISTILLED water into the water tank. The water tank should be filled up to
the horizontal line. In case there are water drops on the tank, remove them with a paper towel.
5. Place the frame on the scale. The 4 stands are flush with the bulges. The nacelle is completely
submerged in the distilled water. Also, there should be no direct contact between frame,
nacelle and water tank.
Calibration before first use and changed place
1. Turn on the GVS Archimedes with the switch on the side and press the button ON/OFF.
2. Wait 30 minutes. During this time, the electric circuits will stabilize (IMPORTANT for calibration).
3. Press the button ZERO to return the device to 0.00.
4. Press and hold ZERO until the display shows “CAL”.
5. The scale is now in calibration mode and shows “500.00”.
6. Place the calibration weight at the center of the weighing platform.
7. The GVS Archimedes will now be calibrated automatically.
8. The calibration is finished when the display shows “END”.
9. Remove the calibration weight. The GVS Archimedes returns automatically to the
weighing mode.
Temperature Compensation
1. For correct results, please set the water temperature. Place the included thermometer
in the water.
2. After 2 minutes read the temperature value. The default value is 25°C. If your water
temperature is different, change the value as follows:
3. When the display shows “0.00” press and hold button A until “C25” is displayed.
4. With button A you can change the figure, with ZERO you can switch to the next figure.
5. Press ENTER when you have finished your temperature settings.

3
GVS Archimedes
Operation
The GVS Archimedes calculates the precious metal portion of your test objects. For this, you first measure the
weight in air (“M1”) and compare it with the weight in water (“M2”). Save the obtained values by pressing the
ENTER button.
1. Switch to the desired mode by pressing the button A 2x.
G stands for gold mode
P stands for platinum mode
S stands for silver mode
2. “M1” is flashing on the display. Place your test object at the center of the weighing platform.
3. The value is stable as soon as “O” appears on the display (top left). Save this value by
pressing ENTER.
4. “M2” is now flashing on the display. Open the lid (weighing platform) and gently place the
test object with the included tweezers at the center of the nacelle. Avoid the formation
of air bubbles.
5. The value is stable as soon as “O” appears on the display (top left). Save this value by
pressing ENTER.
Gold-Mode
6. The display will now show the carats of the according alloy. Press button A to switch between
the alloys. At first, the carat value for gold-silver-copper will be displayed, then gold-copper
(e.g. Krugerrand) and then for gold-silver. After this, the specific gravity (S.G.) value will be
displayed in [g/cm³].
7. Press ENTER again to show the percentage of gold of the according alloy. Press A to switch
between the alloys.
8. By pressing ENTER again, the scale will return to the weighing mode (“M1” will flash on the
display).
Platin-Mode
6. The portion of platinum will be displayed. Pure platinum will show 1000 parts.
7. To display the specific gravity (S.G.) in g/cm³, press the button A.
8. To display the volume of the test object in [cm³], press the button A again.
9. By pressing ENTER again, the scale will return to the weighing mode (“M1” will flash on the
display).
Silver-Mode
6. The portion of silver will be displayed. Pure silver will show 1000 parts.
7. To display the specific gravity (S.G.) in g/cm³, press the button A.
8. To display the volume of the test object in [cm³], press the button A again.
9. By pressing ENTER again, the scale will return to the weighing mode (“M1” will flash on the
display).

4
GVS Archimedes
Results
„LO“ is shown on the display: The density of the test object is too low.
• Check if you are measuring in the correct mode. E.g. when measuring silver in the gold
mode, the result will always show “LO”.
• Check if there are any materials being measured other than the metal.
• Make sure there are no air bubbles.
• Make sure the test object is not hollow.
„HI“ is shown on the display: The density of the test object is too high.
• Check if you are measuring in the correct mode. E.g. when measuring gold in the silver
mode, the result will always show “HI”.
Important notes
• For accurate results please clean your test objects before weighing with cleaning ethanol.
• Never reach into the water tank directly with your bare hands.
• Clean the water tank regularly on the inside with paper towels and cleaning ethanol.
Avoid finger prints on the inside of the water tank.
• Replace the distilled water regularly (every 1 – 2 months).
• The maximum capacity is 1,200 g. Avoid overloading the GVS Archimedes.
Troubleshooting / FAQs
Why does the calibration not work?
• Try longer warm-up phase before calibration (leave it turned on for 30 – 60 minutes).
My results differ from what I expect.
• Temperature compensation: Check if the set temperature is the same as the measured
water temperature.
• Dust particles and dirt can change the weight and therefore the result: clean the test
object with cleaning ethanol.
• Air bubbles can change the weight in water: avoid the formation of air bubbles on the
bottom side of the test object when submerging the test object.
• If the GVS Archimedes was moved or the environment has changed: calibrate again.
• Water is dirty or evaporated: check or replace the distilled water. The water should
always be clean and filled up the horizontal line.

5
Density Values
GVS Archimedes
Gold Percentage Specic
weight
K24 100% 19.13 - 19.51
K22 91.6% 17.45 - 18.24
K20 83.4% 16.03 - 17.11
K18 75% 14.84 - 16.12
K14 58.4% 12.91 - 14.44
K10 41.7% 11.42 - 13.09
Platinum
Nickel Palladium
Pt. 1000 21.45 21.45
Pt. 950 20.04 20.64
Pt. 900 18.80 19.88
Pt. 850 17.71 19.18
Pt. 800 16.73 18.53
Pt. 750 15.86 17.92
Precious
metals
Specic weight [g/cm³]
at 20°C
Platinum 21.45
Gold 19.32
Rhodium 12.44
Palladium 12.02
Silver 10.53
Other metals Specic weight [g/cm³]
at 20°C
Ruthenium 12.41
Palladium 12.02
Lead 11.36
Copper 8.93
Nickel 8.90
Cobalt 8.85
Iron 7.87
Tin 7.30
Zinc 7.13
Titan 4.51
Aluminium 2.70
Alloy [g/cm³]