Analysis Balance Overview, Principle, Brand,Usage, Faults, and Maintenance Methods

Analysis Balance Overview, Principle, Usage, Faults, and Maintenance Methods

Analysis Balance Overview

The analysis balance, a high-precision weighing instrument, finds extensive application in laboratories, factories, and scientific research. It is employed to accurately measure the mass of objects and boasts high precision, stability, and adaptability to various substances, including powders, liquids, and gases. The advent of analysis balances has significantly enhanced the accuracy of experimental results and the control precision of production processes.

Principle

Designed based on the principle of lever balance, the analysis balance relies on adjusting the weight of counterweights to balance the mass of the measured object. Specifically, the beam of the balance has small pans at both ends, with one end for counterweights and the other for the object to be measured. When the masses at both ends are equal, the pointer fixed on the beam aligns with the central scale, indicating that the balance is in equilibrium. Modern analysis balances incorporate advanced sensor technology and microelectronics, further enhancing measurement precision and stability through electromagnetic force balance principles.

Usage Method

• Placement and Adjustment: Position the balance on a horizontal and stable surface, ensuring it is level by adjusting the foot pads.
• Zero Calibration: Press the “ON/OFF” button. Once the balance displays “0.0” or “0.00”, place the object to be weighed in the center of the balance pan. Wait for the digital display to stabilize, then press the “TARE” key to perform tare operation.
• Weighing: Place the object to be weighed in the center of the balance pan. After the digital display stabilizes, the displayed value represents the mass of the object.

Precautions

• Ensure the mass of the measured object does not exceed the balance’s capacity.
• Avoid direct contact between the balance pan and wet objects or chemical reagents.
• During weighing, place the object on the left and counterweights on the right, maintaining a stable environment inside and outside the balance.

Faults and Maintenance Methods

• Display Value Continually Changes:
  • Fault Causes: Unbalanced balance, poor installation environment, volatile or hygroscopic substances being weighed.
  • Maintenance Methods: Level the balance, choose a suitable installation environment, and use containers to weigh volatile or hygroscopic substances.
• Obviously Incorrect Display Result:
  • Fault Causes: Tare operation not performed, unbalanced balance, long-term lack of calibration.
  • Maintenance Methods: Perform tare operation, check and level the balance, and regularly calibrate it.
• No Display or Display of Dashes:
  • Fault Causes: Power issues, damaged display.
  • Maintenance Methods: Check power plug and wire connections, replace damaged fuses or displays.
• Hanging Ear Falls Off or Tilts:
  • Fault Causes: Too rapid opening or closing of the balance, or improper operation.
  • Maintenance Methods: Gently reposition the hanging ear and adjust it to a stable state. If unstable, use tools like needle-nose pliers for adjustment.
• Internal and External Dampers Collide or Slightly Friction:
  • Fault Causes: Improper damper position or unbalanced balance.
  • Maintenance Methods: Check the balance’s level state, adjust the positions of internal and external dampers until there is no friction.
• Projection Screen Displays Incorrect Scale Position:
  • Fault Causes: Reflecting mirror offset.
  • Maintenance Methods: Rotate the screw beside the projection screen to adjust the reflecting mirror position, ensuring the scale falls exactly on the projection screen.

Conclusion

As a high-precision measuring tool, the analysis balance plays a crucial role in scientific research, production control, and quality inspection. Understanding its principle, mastering correct usage methods, and handling common faults are vital for ensuring measurement accuracy and extending the balance’s lifespan. Regular maintenance and calibration can further enhance the performance and stability of the analysis balance.

Brands and Models of Analysis Balances Repaired by Longi Electromechanical

1. Mettler Toledo
   • XPR Series: XPR2, XPR6U, XPR10, XPR26
   • XS Series: XS204, XS104, XS105
   • MS Series: MS104TS, MS204TS
2. Sartorius
   • Cubis II Series: Cubis II MSA, Cubis II MSU, Cubis II MSE
   • Secura Series: Secura 124-1S, Secura 224-1S
   • Quintix Series: Quintix 124-1S, Quintix 224-1S
3. Ohaus
   • Explorer Series: Explorer EX224, Explorer EX324, Explorer EX124
   • Adventurer Series: Adventurer AX224, Adventurer AX324, Adventurer AX124
   • Pioneer Series: Pioneer PX124, Pioneer PX224
4. A&D Weighing
   • BM Series: BM-20, BM-22, BM-252
   • GX-A/GF-A Series: GX-224A, GF-224A
   • HR-AZ/HR-A Series: HR-250AZ, HR-300AZ
5. Shimadzu
   • AP Series: AP225W, AP125W
   • AU Series: AUW-D, AUW220D
6. Adam Equipment
   • Nimbus Series: Nimbus NBL 124e, Nimbus NBL 224e
   • Highland Series: Highland HCB 123, Highland HCB 223
7. Radwag
   • XA 4Y Series: XA 220.4Y.A, XA 82/220.4Y
   • AS R2 Series: AS 82/220.R2, AS 310.R2
8. Kern & Sohn
   • ABT Series: ABT 120-5DNM, ABT 220-5DNM
   • ALS-A/ALJ-A Series: ALS 120-4A, ALJ 220-4A
9. Scientech
   • ZSA Series: ZSA 80, ZSA 120
   • SA Series: SA 80, SA 120
10. Precisa
    • 321 Series: 321LS125M, 321LS220M
    • 360 Series: 360EP225SM-DR, 360ES125SM
11. Denver Instrument
12. Pinnacle Series: Pinnacle PI-225D, Pinnacle PI-114
13. Sartorius (Old Models)
    • Analytical Series: Analytical A200S, Analytical A120S
14. Setra Systems
    • Super II Series: Super II 225, Super II 125

Longi Electromechanical has nearly 30 years of experience in repairing analysis balances, enabling swift repairs for various instruments. Additionally, we recycle and sell various analysis balances. Welcome to consult.