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    How to choose Truck Scale / Weighbridge  and Buying Guide


    When considering a new weighbridge, straightforward and reputable information can be difficult to find. Educational material that can guide you through the key decisions can be very valuable. This guide is designed to help you make an informed decision when buying a new weighbridge. Whether you need help getting started or want to better understanding technology and specification options, this guide will be useful.

    What is a weighbridge?

    Truck scales or weighbridges are industrial scales that are capable of weighing trucks of all sizes. The most common use of a truck scale is to determine the weight of bulk goods being bought and sold in truckload-sized quantities. In those cases, information from the scale is a crucial part of the business transaction. The scale functions much like a cash register. Enforcement agencies use weighbridges to check for a truck's compliance with road-going vehicle weight limits and Chain of Responsibility. They are also used to monitor intake and output volumes at facilities, such as solid-waste processing and recycling centers, construction sites and more.

    How long is an average weighbridge?

    In applications in which you need to weigh the entire truck, your weighbridge must be long enough to hold all of the wheels of the longest truck you plan to weigh. That usually means 18 to 24 metres or 60 to 80 feet long for tractor-semitrailers, and up to 30 metres or 100 feet for double trailers. The overall maximum length of over-the-road tractor trailers is typically regulated by regional/state/provincial authorities.

    What is a load cell?

    The sensory devices used to measure the weight on the scale. Load cells are the heart of any weighbridge. They are the sensors that measure the weight of objects on the scale deck. Most truck scales require 6 to 12 load cells. They must work together flawlessly to provide accurate weight readings.

    Are analog or digital load cells better?

    Digital load cells are proven to be more accurate than analog load cells. digital load cells are also equipped with signal processing capabilities at each cell. load cells can eliminate errors by monitoring and adjusting the weight measurement based on a number of criteria. They also can include features, such as predictive diagnostics, self-monitoring, breach detection and remote diagnostics. Analog load cells may be required for some applications, such as hazardous environments, where voltage outputs are closely monitored. Outside of those situations, analog is often considered to be an old technology from the past. digital load cells are the future.

    How does a weighbridge work?

    Five main components must work together for a truck scale to function properly. 1. Foundation: permanent installations use a concrete foundation. 2. Weighbridge, also known as the scale deck: this is the structure that creates the driving surface for the trucks. The weighbridge is typically composed of modular sections that are placed together to span the desired length. 3. Load cells: these are the sensors that measure the weight on the scale. In most modern scales the weighbridge is supported by the load cells themselves. 4. Terminal: sometimes referred to as an indicator, the terminal is the control panel for the scale. It displays the weight value to the operator, and often serves as the connection point for other scale peripherals. 5. Cables: the signal from the load cells must be transmitted to the terminal. In most cases this is done with cables.

    What is the difference between concrete and steel deck weighbridge?

    Steel and concrete decks should provide equal weighing performance because both are built to the same design specifications. However, there are some differences that could make one deck type more advantageous for your application. Steel-deck truck scales have a quick installation time of one day and they are lighter weight. Concrete deck scales have a 28-day installation time, as the concrete must cure for this allotted time. They are also much heavier. Concrete-deck scales have better traction than steel decks, which can be slippery when wet. Additionally, concrete scales are better suited for point loading, as it is not recommended on a steel deck. Maintenance, service life and total project cost for both are about the same. Business owners will have to determine what is best for their application and needs.

    What is the average life span of a weighbridge?

    Most scale owners expect a weighbridge to last 10 to 20 years, but lifespan depends on several factors. First, selecting the appropriate scale option and highest quality manufacturer will set your scale up for either a long life or a short one full of regret. There is a large variance in manufacturing quality that should be considered when shopping for a truck scale. Environmental factors and traffic volume also play a part. A scale that weighs 200 trucks per day will wear faster than a scale weighing only 20 trucks per day.  GK has scales in the field still operating that are 20 years old. Many competitors have only been manufacturing for ten years. Make sure you consider proven performance when shopping for a weighbridge. 

    How can I protect my weighbridge from lightning?

    Most weighbridge providers offer weighing systems with numerous grounding features. A single-point grounding system with surge protectors can be the first line of defense for the scale and scale house. These passive systems offer some level of protection. Active systems are able to re-route the current of a lightning strike away from major components. SL-RSD load cells are equipped with a proactive lightning system called StrikeShield. These load cells actively divert a lightning strike away from the terminal and have been tested up to 80,000 amperes in a laboratory to prove their effectiveness.

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