Weighbridges

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Camaweigh Weighbridges

Weighbridges are the main vehicle weighing equipment in the weighing industry. Out of the other kinds of vehicle weighing equipment, the weighbridge is the largest of them all. A weighbridge, alternately called a truck scale, is a type of vehicle weighing equipment which is used to determine the total weight of a truck or vehicle. Unlike other vehicle weighing equipment like the weighing pads and axle weigh scales which both measure the loads on each wheel axle of a vehicle, the weighbridge measure the vehicle as a whole.

Types of Weighbridges

A weighbridge is a vehicle weighing equipment which consists of five important components; a steel platform, load cell/s, concrete foundations, scale indicator, and connecting cables. The steel platform is where the vehicle or truck will be stationed for weighing. There are two kinds of weighbridges offered by Camaweigh, portable and fixed weighbridges. Fixed weighbridges, also referred to as pit type trucks scales, are the type of weighbridges whose steel platform needs to be aligned with the ground level around it. For the setup of the pit type weighbridges, a pit is needed to be made first. Concrete foundations are then evenly placed throughout the length of the steel platform. The concrete foundation is responsible to support the load cells which are sandwiched in between it and the steel platform. The concrete foundations should be strong enough and well-built so as not to crumble under weights reaching up to 40 tons. The loads cells are the most important of the weighbridge and any kind of vehicle weighing equipment. They are the heart and soul which are responsible for reading of the vehicle’s weight. A weighbridge with a defective load cell is useless. Each load cell’s output line is connected to a junction box or summing box which sums up all the individual result from the load cells. The output of the junction box then goes to a scale indicator. Camaweigh’s load cells are made from alloy steel which is sturdy enough to handle massive loads on their own. The maximum capacity load cell which Camaweigh offers reaches up to 40 tons.  A load cell is a type of pneumatic transducer which converts forces like shear, strain, and compression into electrical current. Scale indicators are responsible for accumulating all the data and displaying the results.

How Weighbridges Work

The weight of the vehicle or truck’s load is determined by first weighing it empty. This will be established as the reference point. When the truck or vehicle is loaded then it will be weighed again on the weighbridge. The reference point will then be subtracted from this new weight reading. The difference of the two weights will be the weight of the payload. Calibration tests are very important to conduct on weighbridges to ensure that you will get the most accurate reading possible and to find out if you need to adjust anything on the setup. When there is nothing on the weighbridge, the reading on the scale indicator should exactly be reading a zero. Repeatability test is a good calibration test to conduct on newly installed weighbridges, portable or not. This calibration test ensures that you will get the same weight result every single time when the same truck is used under the same kind of condition. If the result the tests differ each time, then it is best to check the setup and the weighing equipment. It may be that a load cell might be functioning or that maybe the steel platform of the weighbridge is not leveled and aligned with the ground. It the steel platform is not leveled, the load cells will each read differently on every attempt.