High-precision Checkweigher

The High-precision Checkweigher (Model JDT-CZ-A30-30K/100K) is an inline dynamic weighing system manufactured by Jiangsu Jutian Weighing Equipment Co., Ltd. It is designed for production lines handling medium-to-large packaged products—such as bulk bags, large cartons, multi-pack bundles, and industrial containers—where final weight verification and completeness checking are required before palletizing or dispatch.

The system captures weight readings as products pass over the weighing conveyor, compares each measurement against preset target and tolerance values, and generates a pass or fail decision. For fail conditions, the conveyor stops or an alarm output is triggered, depending on the configured operation mode. The equipment is intended for integration into automated packaging lines, end-of-line inspection stations, and outbound logistics verification points.

Technical Specifications

Accuracy note: Detection accuracy depends on the weight, dimensions, conveying stability, and environmental conditions of the measured product. Accuracy figures stated are achievable under controlled factory testing with representative product samples. On-site commissioning establishes actual performance under production conditions.

Jiangsu Jutian Weighing Equipment Co., Ltd. holds ISO9001 quality management certification and CE product certification. With over 20 years of experience in weighing instrumentation, the company has accumulated 68 national patents and 20 software copyrights through its 919 R&D Center. Manufacturing is conducted across two production facilities under standardized quality control procedures covering material inspection, assembly, calibration, and final testing. Non-standard customization—including conveyor dimensions, frame materials, communication interfaces, and software functionality—is supported based on project requirements.

Weighing Section Mechanical Design and Load Handling

The weighing conveyor section is engineered to accommodate products weighing up to 100 kg in dynamic transit. The load cell assembly is specified for the rated capacity with an appropriate safety margin to handle brief overload conditions that can occur when products are placed or transferred onto the conveyor. The conveyor frame uses high-strength carbon steel or optional stainless steel, with structural reinforcement at the load cell mounting points.

Shock-absorbing mounting elements are positioned between the weighing platform and the support frame to attenuate mechanical impact transmitted when products enter the weighing zone. This mechanical isolation serves two functions: it protects the load cells from transient overload spikes, and it reduces the settling time required for the weight signal to stabilize before the reading is captured. The belt drive motor is mechanically separated from the weighing section to prevent motor vibration from coupling into the load cell signal.

Data Recording and Quality Traceability

Each inspection cycle generates a data record that includes the timestamp, measured weight, target weight, tolerance limits, and pass/fail result. The controller stores these records internally, and data can be exported via USB in CSV format for production analysis, quality reporting, or batch documentation. For lines with network connectivity, weight data can be transmitted to a host system via configurable communication interface.

The system supports preset upper and lower weight limits for each product. When a measured weight falls outside the configured range, the controller triggers an alarm output and stops the outfeed conveyor to prevent the non-conforming item from proceeding downstream. The conveyor remains stopped until the operator removes the flagged item and acknowledges the alarm, creating a documented quality gate in the production flow.

Frame Material Options and Environmental Adaptation

The standard frame is constructed from high-strength carbon steel with anti-corrosion surface treatment. For facilities with washdown requirements, humidity exposure, or corrosive atmospheres, a stainless steel frame can be specified. For environments where flammable materials are present, explosion-proof configurations (Ex d IIB T4 Ga rating) are available, with the controller and electrical enclosures designed to meet the relevant protection standards. The equipment is designed to operate reliably in standard industrial environments; installation should avoid areas with strong electromagnetic interference, condensing humidity, or excessive floor vibration.

Typical Inspection Tasks

FAQ (Frequently Asked Questions)

How does the checkweigher handle products with uneven weight distribution or unstable bases?
Products with uneven weight distribution may exhibit measurement variation if the center of gravity shifts during conveyor transit. The shock-absorbing mounting and mechanical isolation of the weighing section help reduce the effect of load shifts. For products with flexible or unstable bases, guide rails can be installed to center the product on the belt. Product samples are typically evaluated during the engineering review to determine if additional fixturing is needed.

What is the difference between stopping the conveyor for fail products versus using a reject mechanism?
The standard operation mode stops the outfeed conveyor when a non-conforming item is detected. The operator removes the flagged item and restarts the line. This is suitable for moderate throughput lines where operator intervention is practical. For higher-speed lines or automated rejection, a pneumatic pusher or diverter can be integrated as a customization option.

Can the checkweigher be integrated with an inkjet coder or label printer?
Yes. The controller can output a signal synchronized with the product position to trigger an external coding or printing device. This allows weight data, batch codes, or timestamps to be applied to the product after weighing. Configuration details—including communication protocol, signal timing, and data format—are specified during system setup.

What calibration procedure is used for the 30–100 kg range?
Calibration is performed using certified test weights appropriate to the rated capacity. The touchscreen interface provides a guided calibration routine. For capacities up to 100 kg, multiple calibration points across the range are recommended to ensure linearity. The calibration procedure can be repeated by on-site personnel as part of routine quality checks.

Is explosion-proof configuration available for chemical industry applications?
An explosion-proof configuration rated Ex d IIB T4 Ga is available. This applies to the electrical enclosures, controller housing, and wiring. The specific configuration must be specified at the time of ordering, as it affects component selection and certification documentation. The standard mechanical design of the load cell and conveyor assembly remains unchanged.