Scientech 10K Series - Manual (Page 13)

Below Balance Weighing:
Note: Please use care when installing Below Balance Weighing. The suspension can be damaged if over tightened. The
overload protection which is built into the pan assembly is not available at the below balance hanging device. Therefore,
care must be taken to avoid side shocks or pulling too hard on the hanging device.
For applications requiring suspension of weighings below the balance, a 6-32 threaded screw is provided. To access the set screw,
proceed as shown. Then mount the balance on a solid pedestal or surface with a hole under the balance to allow access to the hanger.
While using the below balance weighing feature all other functions of the balance operate normally. The balance is capable of weighing
both above and below simultaneously provided the capacity of the unit is not exceeded.
Figure 5 Below Balance Weighing
Specific Gravity Determination:
The below balance weighing apparatus shown previously is ideal for determining specific gravity. Specific gravity is the ratio of the
mass of a body to the mass of an equal volume of water. Every mineral has its own specific gravity (SG). A list may be found in any
Handbook of Chemistry and Physics. Specific gravity will classify or authenticate a substance. For instance, a diamond’s SG is 3.50-
3.53 while quartz’s is 2.65.
To determine specific gravity using our balance:
1. Install a below balance weighing hangar as shown in the previous section.
2. Install a below balance weighing apparatus, such as a wire hook, including a pan suspended in a bowl of water. Insure that the
pan and the hanger do not touch any part of the bowl and all are totally submerged. Then tare the balance.
3. Then place the sample to be tested on the balance pan and record the weight reading shown on the display. You may use any unit
of measure you desire.
4. Then place the same sample to be tested on the pan suspended in the bowl of water. Make sure that the sample is completely
submerged in the water and record the weight reading shown on the display.
5. Subtract the reading in Step 4 from the reading in Step 3.
6. Divide the reading in Step 3 by the number calculated in Step 5. The result is the SG of your sample.
EXAMPLE: Reading in Step 3 = 6.50
Reading in Step 4 = 4.25
Subtraction = 2.25
Division (Step 6) = 6.50/2.25= 2.89 specific gravity
Security Bracket:
A security bracket is provided on the rear panel. If needed, the bracket slides out of the rear of the balance providing a convenient
method of securing the balance.
Options:
Remote Weighing (7000-04) and Custom Unit of Measure (9000-90) options must be installed at the factory or by personnel
authorized by Scientech. Other options, such as a Scientech printer, may be purchased at any time. Please contact Scientech at
(303)444-1361 or (800) 525-0522 or email us at [email protected] for information.
Optional RS-232 Printers:
Note: Printers must be serial.
There are a few different models to choose from. Please contact Scientech or one of our representatives for more information. A
comprehensive manual is included with each printer when purchased. All printers are set for a 9600 baud rate. To change this setting
please see the printer manual and the RS-232 Front Panel Configuration section. The balance display contents can be sent to the
printer at any time by pressing the balance front panel SEND switch. Balances only communicate with serial printers.
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