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23

6.4 Percent weighing

The U.S. Solid USS-DBS47/48 Analytical Balance has a built-in percent

weighing function.

1. Zero the balance in the weighing state.

2. Press the

“

ON

”

button several times in succession until

“

PCT

”

is

displayed.

3. Press

“

O/T

”

and

“

PCT 100PCT

”

will be displayed.

4. Put the item to be used as a reference on the weighing pan and

confirm by pressing

“

O/T

”

.

5. "100.00 PCT" will be displayed. Then the percent weighing operation

can be started.

Summary of Contents for USS-DBS47

Page 1: ...Instruction Manual USS DBS47 48 Analytical Balance ...

Page 2: ...nnecting 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 ...

Page 3: ...ase 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 c...

Page 4: ... 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 p...

Page 5: ...3 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 ...

Page 6: ...4 1 RS 232 connector 2 Level bubble 3 Power inlet ...

Page 7: ...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 ...

Page 8: ... 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 ...

Page 9: ...ness 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 ...

Page 10: ... 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 objec...

Page 11: ...r 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 analyti...

Page 12: ...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 ...

Page 13: ...ource 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 Onl...

Page 14: ...or 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 ...

Page 15: ... 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 ...

Page 16: ...ory 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 DEFAU...

Page 17: ...ignal 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 ...

Page 18: ... 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 r...

Page 19: ...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 ...

Page 20: ...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 ...

Page 21: ...es a stable state 4 Read the value displayed Weighing a sample that needs to be in a container 1 Open the glass door of the weighing chamber and place the weighing container on the weighing pan then close the glass door again 2 Wait for the display to stabilize The appearance of the stability mark indicates a stable state Then press O T to tare and the displayed value will return to zero 3 Open th...

Page 22: ...equirements in various usage situations 1 Press the ON button several times in succession until the UNIT is displayed 2 Press O T to enter the selection of unit 3 Press ON to select required unit and confirm by pressing O T To avoid the deviation of the weighing record caused by unit misreading please ensure that the selected unit is the one required ...

Page 23: ...counting function for small components To ensure the accuracy of the counting function for small components it is necessary to ensure that the weight of all samples is consistent and that the weight of a single object is 0 5mg 1 Press the ON button several times in succession until the COU is displayed 2 Press O T to enter the counting function COU 5PCS will be displayed ...

Page 24: ... samples Press O T to confirm and COU PCS will be displayed 4 The operation can be started when the COU disappears and the corresponding number appears 5 After the test is finished press ON to select weight and press O T to confirm to exit and return to the weighing interface ...

Page 25: ...he balance in the weighing state 2 Press the ON button several times in succession until PCT is displayed 3 Press O T and PCT 100PCT will be displayed 4 Put the item to be used as a reference on the weighing pan and confirm by pressing O T 5 100 00 PCT will be displayed Then the percent weighing operation can be started ...

Page 26: ...he height onto the weighing pan 3 Do not expose the balance to high humidity or dusty conditions for an extended period of time 4 When the balance is not to be used for a long time cover it with to prevent dust from entering 5 When weighing powder and fine particles should be done with a suitable container to prevent dust and particles from falling into the load cell below the weighing pan 6 Wear ...

Page 27: ...e balance using a piece of lint free cloth which has been wet with a mild detergent soap only Removing the sliding glass doors for cleaning 1 Remove the pan and anti draft ring from the weighing chamber 2 Unscrew and remove the inside knob on the glass door 3 Slide the glass door out backwards 7 3 Disposal Disposal of equipment and packaging must be carried out by the operator in accordance with r...

Page 28: ... display is constantly changing or unstable Possible causes The sample pan is in contact with the draft shield or heating chamber Glass draft shield is not closed Test bench vibration Electromagnetic field interference Power supply instability Problem Displayed value and actual weight are not consistent Possible causes Not calibrated before weighing Not returned to zero before weighing Balance not...

Page 29: ...27 8 2 Error code Error code display Description Err Calibration operation error Err 1 Counting setting error Err 2 The weighing pan is not placed correctly Err 3 Sample weight exceeds range ...

Page 30: ...Readability 0 0001g 0 1mg Repeatability 0 0002g Linearity deviation 0 0003g Stabilization time Within 3 seconds Operating temperature 63 5 72 5 17 5 22 5 Pan size Φ80mm Interface RS232 Power 110V 60Hz AC Dimensions 340 215 350 mm Net weight 6 5kg Shipping weight 10 0kg ...

Page 31: ...Contact Feel free to visit our website www ussolid com You can email us at service ussolid com You can call one of our friendly customer service representative at 1 800 209 4177 ...

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