User's Manual

5.0 DENSITY

FUNCTION

Once the HCB J is prepared for a density test and the parameters have been set for

doing the Density Determination (see section 6) the following procedure is used to

weigh the sample in air, and then again in water or another liquid, allowing you to

determine the density of the sample and if applicable a determination of the purity

(karat) of the gold in the sample.

The Hold function must be enabled (see section 7.2) for the Density function to

operate correctly. The Density parameters (see Section 6.0) should be checked

before doing a test as the results are dependent on the liquid and alloy settings.

NOTE: To perform a density only test set the parameters for density test (Section 6)

to Silver (Ag), Set Hold to Automatic (Hd Au), Select water for the liquid (H2O) and

automatic temperature detection (Auto tmP). Then when doing the density test only

the density of the sample will be displayed.

5.1 WEIGHING

SAMPLE

Place the sample to be weighed in air on top of the lid of the Density Chamber and

allow the weight displayed to become stable. If the Hold function is set to manual

press the [Hold/Print] key. The capacity tracker at the bottom of the display will

move from right to left and when ready the display will show “HOLD”. If the Hold

function is set to automatic you are not required to press the [Hold/Print] key once

the weighing in air becomes stable.

After the Hold symbol is shown press the [Air/Liquid] key to store this value. Wait

for the Weight in Air indicator to be displayed before you proceed to the next step.

Remove the sample and ensure the balance returns to zero. If necessary press the

[Tare] key to zero the display.

Open the lid of the Density Chamber and carefully place the sample in the liquid on

the suspended pan. It may be helpful to shake the sample gently to dislodge any air

bubbles.

Close the lid of the Density chamber and allow the weight displayed to become

stable. If the Hold function is set to manual press the [Hold/Print] key. The capacity

tracker at the bottom of the display will move from right to left and when ready the