How to Install an Electronic Belt Scale Correctly?

An electronic belt scale is a measuring instrument used for continuous dynamic weighing of industrial bulk materials. It is suitable for various fields such as chemicals, coal mines, agriculture, ports, and environmental protection. The operating environment is complex and diverse. To ensure the scale's operation is not affected by the environment, apart from the components and performance of the electronic belt scale itself, installation is also a crucial factor for reliable and stable use. It can be said that the accuracy and stability of an electronic belt scale depend "30% on itself and 70% on installation".

However, installing an electronic belt scale is not a simple task. It requires accurate judgment of the on-site operating environment, selection of the most suitable installation location, and proper installation of all components to ensure normal performance. Experienced technical engineers from Guonuo Technology have summarized some installation experience for belt scales to share with you.

1. Environment Selection for Scale Installation

·Keep away from air vents, rain, and direct sunlight.

·Avoid locations with vibration sources, corrosive gases, strong magnetic fields, and interference from large electrical equipment.

2. Selection of Scale Frame Installation Position

·Generally, install near the tail end, about 10 meters away from the feed inlet.

·Ensure that the several sets of idler rollers near the installation position are on the same horizontal line to maintain uniform force distribution on the idler rollers above the belt scale.

·Avoid installing near the head end, where belt tension is high, as it may cause zero-point drift. Also, avoid sections where the belt sags.

3. On-site Scale Frame Installation

·For installation in flat or gently sloping areas, remove the screws on both sides of the idler roller bracket, and two people can simultaneously tilt the bracket left or right to remove the idler roller and bracket.

·For installation in areas with steep slopes and high idler roller loads, use a manual hoist, steel wire rope, and a long angle iron as a beam to lift the belt and then remove the idler roller and bracket easily after removing the screws on both sides of the bracket.

4. Scale Frame Installation

·Installation of weighing idler rollers: The radial runout, supporting height, and groove angle should be within the allowed tolerance range. The selected idler rollers must match the original idler rollers in size and groove angle.

·Guide idler rollers (anti-deviation idler rollers): Install them four sets away from the weighing idler roller on both sides.

·Idler roller calibration: The weighing idler roller and the three sets of idler rollers before and after it should meet precision size standards. Adjust them with shims to ensure the idler rollers on the scale are not affected by changes in belt tension.

·The weighing zone idler rollers refer to the weighing idler roller and the four sets of idler rollers on each side. The idler rollers in the weighing zone should be 3-6mm higher than other idler rollers on the conveyor frame to ensure the entire weighing zone is higher.

·The centerline of the weighing idler roller should align with the centerline of the conveyor. The idler rollers in the weighing zone should be level and equidistant, with a measurement accuracy of ±0.8mm for the spacing between each idler roller and the reference idler roller to ensure they are straight. Ensure consistent spacing and height of idler rollers in the entire weighing zone.

5. Encoder Installation

·The encoder should not be installed directly below the several sets of idler rollers on the scale frame. It should be at least 2-3 idler rollers away from the scale frame to prevent encoder vibration from affecting the scale's measurement.

6. Instrument Installation

·Fix the instrument to the wall or frame near the belt scale frame.

7. Sensor Installation

·When using two sensors, their load-bearing points should be on the same horizontal plane, and the line connecting the load-bearing points should be parallel to the roller axis.

·When using a single sensor for suspension metering, it should be installed vertically on the centerline of the scale body.

·The measurement range of the sensor should be more than 120% of the material weight in the measurement section at the maximum flow rate of the belt conveyor. When using multiple sensors, they should have the same measurement range and performance indicators.

·After wiring and powering on, supply power to both weighing sensors. Do not connect the two sets of signal lines together initially. Use a multimeter to measure their millivolt signal voltage separately. Adjust the screw below each sensor to make the millivolt voltage of the two sensors consistent (tightening the screw increases the voltage, and loosening it decreases). Then connect them together and plug them into the host circuit board. This also applies to scale frames with four sensors; adjust the millivolt voltage of all four sensors to be the same.

Proper installation of the electronic belt scale provides the foundation for subsequent stable use. Regarding belt scale installation, Guonuo Technology's technical engineers will communicate with customers in detail and provide professional installation solutions.