Performance Evaluation and Certification for Checkweighing Equipment

Performance evaluation and certification for checkweighing equipment is a critical process for ensuring product quality, legal compliance, and operational efficiency. Unlike static scales, checkweighers weigh products in motion, which introduces unique variables that must be carefully managed. A comprehensive evaluation and certification process ensures the system is not only accurate but also reliable under real-world production conditions.

Key Components of Performance Evaluation

1. Initial Assessment and Mechanical Inspection

Before any tests begin, a thorough physical inspection is necessary. This step ensures the checkweigher's fundamental components are in good working order and not causing any measurement errors.

• Visual Check: Inspect the conveyor belts, weigh platform, and frame for any signs of damage, wear, or debris. The weigh platform must be free-floating and not touching any surrounding parts.

• Component Integrity: Check for loose bolts, screws, or wiring. The load cell, which is the heart of the weighing system, must be secure and undamaged.

• Environmental Factors: The checkweigher's performance is sensitive to its environment. Factors like vibration from other machinery, temperature, and humidity can all affect accuracy. Technicians assess these conditions to ensure they are within the manufacturer's specifications.

2. Calibration and Verification

Calibration is the process of adjusting the checkweigher to ensure it measures weight correctly. Verification, on the other hand, is the act of confirming that the system is performing accurately and consistently.

• Static Calibration: This is a preliminary step where the checkweigher is calibrated with certified test weights while the conveyor is stopped. It establishes a baseline of accuracy.

• Dynamic Calibration: This is the most crucial part for a checkweigher. A known, stable product (or a test weight) is passed over the moving conveyor multiple times. This test confirms the system's ability to accurately weigh products in motion.

• Repeatability Test: To check consistency, a single product of known weight is run through the checkweigher multiple times (e.g., 10-20 times). The recorded weights should fall within a very tight tolerance, typically within a few standard deviations, to prove the machine's repeatability.

• Corner Load Test: For static calibration, a weight is placed at different corners of the weigh platform to ensure the system measures accurately regardless of where the product is positioned. This verifies the performance of all load cells.

Specifications:

SMARTWEIGH INSTRUMENT CO.,LTD , established over 15 years, which is one of the largest manufacturers and exporter in China. Our workshop occupy 20,000 square meters and located in a very convenient and beautiful city, Changzhou, it is close to Shanghai and only take one hour by high speed railway.

  Our company have advanced production equipments like Bending machine, pre-arch machine, shearing machine, qutomatic welder, automatic welding robot, plasama cutting machine, and baking paiting room, to help us increase the product quality and  production productivity  Our company also have the senior technician team and design team. Many products have been applied  patents. 

  Under the advanced test equipement, technical workers and rich experice, we manufactured high qualified truck cales, platform scales, bench scales, crane scales, highway axle scales, as well as spare parts like indicators and loadcells. We have exported to RUSSIA, KSA, USA, UK, HOLLAND, SPAIN, ITALY etc many different kind of countries, our good quality and timely delivery has attracted over 200 long term distrbutors all over the world.

Our yearly export collection amount keep about 5000,000 to 10000,000 USD, among of this, our project for the foreign railway, highway and government is the majority. By the way, We can supply both ODM and OEM design also.

  Our company havs been awarded ISO 9001, CE, SGS, OIML cetificate for our products, all weighing scales are 

pre-calibrated before shipping, We deicated to the spirit of " Quality come first forveve and technology detemines the productivity"since extablished, and we have benifited from it and quietly brilliant for over 15 years.

More and more wonders and brilliant future will be made be by SMARTWEIGH!