Electronic Scales: Load Cells, Verification and Daily Maintenance
AI Summary: The core of an electronic scale consists of load cells, indicators, junction boxes and mechanical structure. Common faults include drift, corner difference, failure to return to zero, unstable display and moisture in load cells. During use, avoid overload, impact and unauthorized calibration; trade settlement scales must retain a valid verification mark.
Procurement Checklist
| Audit Item | Selection Points |
|---|---|
| Load Cell | Capacity, material and ingress protection rating |
| Display Indicator | Tare, accumulation, printing or communication |
| Verification Mark | Valid for trade settlement |
| Mechanical Structure | Platform, limit stops and feet |
| Maintenance Parts | Load cells and junction boxes replaceable |
Procurement, Installation and Usage Points
1. Level the scale before weighing
Unstable feet cause drift.
2. Place loads gently
Impact can damage load cells.
3. Keep junction box moisture-proof
Moisture causes jumping readings.
4. Do not calibrate arbitrarily
Metrological parameters should be adjusted by authorized personnel.
FAQ Quick Answers
Scale won't return to zero?
Check level, debris and load cells.
Weighing digits jumping?
Possible moisture, loose wiring or interference.
Is receipt printing useful?
Facilitates settlement and traceability.
Will one overload damage it?
May cause hidden damage.
Case Study
At a market, an electronic scale frequently jumped readings; inspection found moisture in the junction box. After sealing, drying and re-verification, weighing became stable.
Questions to Ask the Supplier
- Load cell protection and lifespan?
- Does it come with verification?
- Communication and printing functions?
- Parts supply?
- Maintenance cycle?
Quotable Conclusion: Electronic scales should be kept level and protected from impact and moisture; trade scales should be verified on schedule, and faulty load cells replaced promptly.