U.S. Solid USS-DBS47 User manual

Instruction Manual
USS-DBS47/48 Analytical Balance

Table of Contents
1. Introduction................................................................................................................1
1.1 Safety Precautions.............................................................................................1
2. Design and Function...................................................................................................3
2.1 Components...................................................................................................... 3
2.2 Keyboard............................................................................................................5
2.3 Display panel..................................................................................................... 6
3. Installation..................................................................................................................7
3.1 Unpacking and delivery inspection................................................................... 7
3.2 Selecting the location........................................................................................ 8
3.3 Installing components....................................................................................... 9
3.4 Leveling the balance..........................................................................................9
3.5 Connecting the power.....................................................................................11
4. Settings..................................................................................................................... 12
4.1 Display speed...................................................................................................12
4.2 Stability............................................................................................................13
4.3 Restore factory defaults.................................................................................. 14
5. Calibration................................................................................................................ 16
5.1 Internal calibration.......................................................................................... 16
5.2 Automatic internal calibration........................................................................ 17
5.3 External calibration..........................................................................................18
6. Weighing and Applications.......................................................................................19
6.1 Weighing..........................................................................................................19
6.2 Unit of weight..................................................................................................20
6.3 Counting function............................................................................................21
6.4 Percent weighing............................................................................................. 23
7. Maintenance.............................................................................................................24
7.1 Precautions......................................................................................................24
7.2 Cleaning...........................................................................................................25
7.3 Disposal........................................................................................................... 25
8. Troubleshooting........................................................................................................26
8.1 Troubleshooting...............................................................................................26
8.2 Error code........................................................................................................ 27
9. Technical Data...........................................................................................................28

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1. Introduction
Thank you for choosing the U.S. Solid USS-DBS47/48 Electronic Analytical
Balance.
The U.S. Solid USS-DBS47/48 Electronic Analytical Balance is precise and
reliable. It provides a high level of operating convenience and response
sensitivity to facilitate determination of the weight of your samples. U.S.
Solid’s dedicated customer service staff are available to answer any
inquiries regarding applications and accessories.
Please read the manual completely and follow the usage instructions
before installation and operation as this will help you to make full use of
the functions and performance of the USS-DBS47/48 Analytical Balance.
1.1 Safety Precautions
The U.S. Solid USS-DBS47/48 Analytical Balance qualifies as
state-of-the-art technology and complies with all recognized safety rules.
Improper use or handling, however, can result in damage and/or injury.
Please follow the precautions below to ensure safe and trouble-free
operation of your balance.
•The balance has a 3-pin power socket equipped with a
ground terminal. To prevent electric shock and to maintain

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stability in operation of the balance, be sure to ground the balance.
•Avoid getting the balance wet as it is not water resistant. Any leakage
of liquid into the balance may damage the balance or cause an electric
shock to the user.
•Use a power source (voltage, frequency, outlet type)
adapted to the specification of the balance. If excessive
voltage is used, the balance may overheat and be damaged or cause a
fire.
•Operate the balance on a stable, rigid and flat table.
•Handle the balance carefully. It is a precision device,
subjecting it to impact may result in a malfunction.
•If the device is not be used for a long period of time, the power
should be turned off and disconnect the power cable.
•Do not disassemble, remodel or repair this product or accessories.

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2. Design and Function
2.1 Components
1: Weighing chamber
2: Weighing pan
3: Anti-draft ring
4: Display panel
5: Keyboard
6: Glass door
7: Handle of glass door
8: Balance main body
9: Leveling foot

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1: RS-232 connector
2: Level bubble
3: Power inlet

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2.2 Keyboard
Key
Description
Turn the power off
Output the displayed values to an electronic printer,
computer, or other external devices
Tare the balance
Select or set displayed item
Performs automatic internal calibration
Turn the power on
Enter menu item selection
Enter mode item selection

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2.3 Display panel
No.
Description
1
Weight value
2
Weight unit
3
Indicates positive values
4
Indicates negative values
5
Stabilization indicator
6
Display speed
7
Stability
8
Automatic calibration time mode

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3. Installation
3.1 Unpacking and delivery inspection
The USS-DBS47/48 Analytical Balance is a precision instrument. Unpack
the balance carefully and check the delivered items for completeness.
The following accessories are part of the standard equipment for your
new USS-DBS47/48 Analytical Balance:
·1 Balance Main Body
·1 Weighing Pan
·1 Draft Shield
·1 Power Cable
·1 Calibration Weight
·1 Glove
·1 Instruction Manual
·1 Quality Certification
Check the instrument for damage in transit. Immediately inform the
U.S. Solid customer service if you have any complaints or parts are
missing.

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3.2 Selecting the location
Measurement performance of your balance depends largely on the
surrounding environments.
Please follow these guidelines to make sure the proper environmental
conditions are met:
•Select a firm, horizontal location that is free from vibrations.
•Make sure that the ambient temperature is between 5°C and 30°C,
the relative humidity is around 50% and that non-condensing conditions
are met.
•Avoid direct sunlight and ensure that there are not any excessive
temperature fluctuations.
•Ensure the balance is places a sufficient distance from heat-sensitive
materials in the vicinity of the instrument.
•Avoid the effects of air currents from air conditioners, ventilators,
open doors, or windows.
•Keep away from objects or equipment that are magnetic or capable
of generating magnetic fields.
•Surroundings should be as free from dust as possible.

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3.3 Installing components
1. Place the balance main body
on the installing location.
2. Push the side glass door open.
3. Gently attach the pan on the
center axis of the weighing
chamber.
4. Push the side glass door close.
3.4 Leveling the balance
Accurate horizontal positioning necessary for repeatable measurements
and exact results. To compensate for small irregularities or tilts at this
location, the instrument needs to be leveled.
Adjust the leveling feet of the analytical balance until the air bubble in
the indicator is centered. The level indicator is located under the cover
towards the rear of the analytical balance.

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Position of air bubble
Adjustment method
up
Turn both feet clockwise
down
Turn both feet counterclockwise
Left
Turn left foot counterclockwise, right foot
clockwise
Right
Turn left foot clockwise, right foot
counterclockwise

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3.5 Connecting the power
Warning:
•To prevent electric shock, be sure to use the 3-pin power cord with
equipment grounding connector.
•Check to make sure the voltage indicated on the analytical balance
data label matches the local line voltage. Do not connect the balance to
the power source if it does not match.
Connecting a power cable:
a. Insert the female end of the power cord into the power inlet located
at the rear of the main unit.
b. Plug the male end of the power cord into the outlet.
Note:
To obtain accurate results, the analytical balance must be warmed up for
at least one hour each time it is connected to an AC power source or
after a power outage of more than 30 minutes.
Only after this length of time will the balance reach the required
operating temperature.

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4. Settings
4.1 Display speed
If the operating environment meets the requirements, the display speed
of the balance can be adjusted to reduce the time required for the
balance to stabilize, thereby improving work efficiency.
Icons
Description
Highest speed
High speed
Normal speed
Low speed
Depending on the environment in which the instrument is used,
carefully select the display speed to avoid instability that might be
caused by excessive speed.
1. Press the “ON”button several times in succession until the “SPEED”is
displayed.

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2. Press “O/T”to enter the selection of display speed mode.
3. Press “ON”to select required speed and confirm by pressing “O/T”.
4.2 Stability
According to different operating environments, the balance is kept in a
relatively stable state by adjusting its stability.
It is recommended that the balance be adjusted appropriately in an
environment that guarantees its normal operation.
Icons
Description
Lowest stability
Low stability
Normal stability
High stability

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1. Press the “ON”button several times in succession until the “STAB”is
displayed.
2. Press “O/T”to enter the selection of stability.
3. Press “ON”to select required stability and confirm by pressing “O/T”.
4.3 Restore factory defaults
If the balance is improperly set or operated, all settings can be restored
to factory defaults, which will ensure that the balance is suitable for
most operating habits and environments. When the balance is found to
be abnormal and unstable, the stability of the balance can also be
adjusted by restoring the factory settings.
1. Press the “ON”button several times in succession until the “DEFAULT”
is displayed.

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2. Press “O/T”to confirm and an audible signal will sound.
3. Then return to the splash screen, the factory defaults have been
restored.
* The setting is only applicable to situations where settings are confusing
due to incorrect operation. Factory defaults should NOT be performed
frequently.

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5. Calibration
Calibration is a necessary step to assure the analytical balance will
accurately weigh the sample.
Perform calibration operations in the following situations:
•Changes in the location of use (including moving in the same room).
•Changes in ambient conditions.
•Prior to each use.
The USS-DBS47/48 Analytical Balance offers three calibration methods.
5.1 Internal calibration
Install the balance as instructed and ensure it is sufficiently warmed-up.
When the balance is in the no-load state, press the “CAL”button and
“CAL-INT”will flashing displayed. Then the balance will start automatic
internal calibration. The instrument will return to weighing after
calibration.

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5.2 Automatic internal calibration
The USS-DBS47/48 Analytical Balance offers four kinds of automatic
calibration time mode to choose from: “10MIN” “30MIN” “60MIN”and
“OFF”. Respectively, these modes indicates that that the balance is
automatically calibrated either every 10 minutes, every 30 minutes,
every 60 minutes or the automatic calibration is off.
Icons
Description
Automatically calibrate every 10 minutes
Automatically calibrate every 30 minutes
Automatically calibrate every 60 minutes
Automatic calibration shut off
Procedure:
1. Zero the balance in the weighing state.
2. Press the “ON”button several times in succession until the
“AUTOCAL”is displayed.
3. Press “O/T”to confirm to enter the time mode selection state.
4. Press “ON”to select the desired time mode.

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5.3 External calibration
The balance must be fully warmed up for one hour to stabilize the
weighing before calibration.
Procedure:
1. Zero the balance in the weighing state.
2. Press the “ON”button several times in succession until the “E-CAL”is
displayed.
3. Press the “O/T”button to confirm and “CAL-200”will flashing
displayed.
4. Place the 200g calibration weight on the weighing pan.
5. Then “200.0000g”will be displayed. External calibration is completed.