U.S. Solid USS-DBS49 User manual

Instruction Manual
USS-DBS49 Analytical Balance

Table of Contents
1. Introduction................................................................................................................1
1.1 Safety Precautions.............................................................................................1
2. Design and Function...................................................................................................3
2.1 Components...................................................................................................... 3
2.2 Display panel..................................................................................................... 5
2.2.1 Home page.............................................................................................. 5
2.2.2 Menu....................................................................................................... 6
3. Installation..................................................................................................................8
3.1 Unpacking and delivery inspection................................................................... 8
3.2 Selecting the location........................................................................................ 9
3.3 Installing components..................................................................................... 10
3.4 Leveling the balance........................................................................................10
3.5 Connecting the power.....................................................................................12
4. Settings and Calibration........................................................................................... 13
4.1 Display speed...................................................................................................13
4.2 Stability............................................................................................................14
4.3 Calibration....................................................................................................... 15
4.3.1 Internal calibration................................................................................ 16
4.3.2 Automatic internal calibration.............................................................. 17
4.3.3 External calibration............................................................................... 19
5. Weighing and Applications.......................................................................................21
5.1 Weighing..........................................................................................................21
5.1.1 Unit of weight........................................................................................22
5.2 Counting function............................................................................................22
5.3 Percent weighing............................................................................................. 25
6. System settings.........................................................................................................28
6.1 Time and Date................................................................................................. 28
6.2 Touch Calibration.............................................................................................29
6.3 Restore factory defaults.................................................................................. 30
7. Maintenance.............................................................................................................31
7.1 Precautions......................................................................................................31
7.2 Cleaning...........................................................................................................32
7.3 Disposal........................................................................................................... 32
8. Troubleshooting........................................................................................................33
8.1 Troubleshooting...............................................................................................33
8.2 Error code........................................................................................................ 34
9. Technical Data...........................................................................................................35

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1. Introduction
Thank you for choosing the U.S. Solid USS-DBS49 Electronic Analytical
Balance.
The U.S. Solid USS-DBS49 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-DBS49 Analytical Balance.
1.1 Safety Precautions
The U.S. Solid USS-DBS49 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: Glass door
6: Handle of glass door
7: Balance main body
8: Leveling foot

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

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2.2 Display panel
2.2.1 Home page
No.
Description
Measuring result area
1
Weight value
2
Weight unit
3
Indicates positive or negative values
Operating buttons area
4
Execute internal calibration
5
Print measuring result
6
Enter the menu page
7
Zero the value when in the no-load state
8
Tare the balance

6
9
Switch the weight unit
Settings display area
10
Display speed currently selected
11
Stability currently selected
12
Automatic internal calibration mode currently selected
13
Indicates the current test mode
Other area
14
Time and date
2.2.2 Menu

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No.
Display
Name
Description
1
Speed
Adjust the display speed of the balance
2
Stability
Adjust the stability of the balance
3
Printer
Printer Settings
4
Calibration
Weight calibration, including automatic
internal calibration and external
calibration
5
System
Setting
Set time and date, perform touch
calibration and restore factory defaults
6
Mode
Test mode selection, including weighing,
counting and percent weighing
7
System
Information
View the basic parameters of the
analytical balance
8
Back
Return to the home page

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3. Installation
3.1 Unpacking and delivery inspection
The USS-DBS49 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-DBS49 Analytical Balance:
·1 Balance Main Body
·1 Weighing Pan
·1 Draft Shield
·1 Power Cable
·1 200g 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 and Calibration
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
Slow
Normal
Fast
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. Tap the “SPEED”icon on the menu page to enter the selection of
display speed.

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2. Select required speed and confirm by tapping “CONFIRM”.
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
Stable
More Stable
Most Stable

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1. Tap the “STABILITY”icon on the menu page to enter the selection of
stability.
2. Select required stability and confirm by tapping “CONFIRM”.
4.3 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-DBS49 Analytical Balance offers three calibration methods.

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4.3.1 Internal calibration
Install the balance as instructed and ensure it is sufficiently warmed-up.
When the balance is in the no-load state：
1. Tap “CAL”on the home page, “CAL-Int”will be flashing displayed.
2. Then “------”will be displayed and the balance starts automatic
internal calibration.

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3. After the calibration is completed, the instrument returns to the
weighing state and displays “0.0000g”.
4.3.2 Automatic internal calibration
The USS-DBS49 Analytical Balance offers four kinds of automatic internal
calibration time mode to choose from: “10mins Internal Cal” “30mins
Internal Cal” “60mins Internal Cal”and “Internal Cal 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.

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Icons
Description
10 minutes
30 minutes
60 minutes
OFF
Procedure:
1. Zero the balance in the weighing state by tapping “ZERO”.
2. Tap “MENU”to enter the menu page.
3. Tap the “CALIBRATION”icon to enter the calibration mode selection.
4. Tap “Internal Calibration”to enter the time mode selection.
5. Tap the desired time mode and confirm by tapping “CONFIRM”.