For the next few entries we are going to answer some frequently asked questions about buying a truck scale. In the first entry we answer the question below.
What exactly is the difference amongst a full-length truck scale and an axle scale? Which variety do you notice recyclers employing most frequently?
An axle scale is designed to weigh only a single individual axle of a large vehicle at one time and may possibly give an overall total gross weight at the conclusion of weighing the truck. Axle scales are frequently portable, but could also be permanent installations as well. For example, check out the video below.
On the other hand, full-length truck scales, usually 70 feet long can weigh the entire truck (all axles included) in a single weighment, so axle scales need more time to weigh up a truck than full-length weighing machines. Recyclers will normally use full-length 18 wheeler scales due to the fact axle scales will not be NTEP legal for trade, which is needed in the recycling industry.
Recycling businesses are having to pay men and women depending on the load of the timber in their particular vehicle load, so consequently it’s important for the scale to be NTEP listed for correct weighments. In brief, the process involves individuals bringing in their recycled copper, the metal recycling company compensates these individuals for it depending on the weight displayed on their truck scale, and so the recycler then usually utilizes a railcar to deliver the material to steel mills. For more information on Cardinal Truck Scales, contact authorized distributor Central Carolina Scale, located in Sanford NC.
Why should you purchase a scale that is “Legal-for-Trade” when you don’t intend to use the weighing instrument in a commercial weighing setting? Defining a commercial weighing application can sometimes be difficult. Scales can be moved around your facility and get utilized for things that perhaps you didn’t originally intend. Basically, an NTEP approved device is required any time money changes hands based on a scale’s reading. Freight scales, for example, must be NTEP approved. For these situations government requires that a scale must pass tests put forth by the National Type Evaluation Program (NTEP). These regulations are meant to protect the consumer. Click here to see the rest of the story.
The other legal for trade question we wanted to discuss is related to Classes. Often you will see NTEP Legal for Trade Class III. But, what exactly does Class III mean? Handbook 44, the book that spells out rules and regulations for the weighing industry, separates weighing devices into five accuracy classes. Depending on the number and value of scale divisions, equipment can be either class I, II, III, IIIL, or IIII, with Class I having the highest precision. All Legal-for-Trade scales fall under one of these five classes.
Table 7a of Handbook 44 breaks down the description of each class. Class III states: “All commercial weighing not otherwise specified, grain test scales, retail precious metals and semi-precious gem weighing, animal scales, postal scales, vehicle on-board weighing systems with a capacity less than or equal to 30,000 lb, and scales used to determine laundry charges.” Continue reading →
Rice Lake Weighing Systems was recently granted an amendment to its NTEP Certificate of Conformance for the SURVIVOR OTR Series of above ground truck scales. The amendment reduces the scale’s minimum division value (emin) from the industry standard 20 pounds to 10 pounds, making the SURVIVOR OTR suitable for not only vehicle weighing, but high-dollar applications such as livestock and scrap-metal weighing. The improved resolution is essential where valuable commodities are being weighed and Rice Lake’s truck scales now offer a competitive advantage in those cases.
The new certification applies to Rice Lake’s entire OTR Series, including steel and concrete decks and pit or pitless grain dump models, in standard widths up to 16.5 feet and standard lengths up to 160 feet. The SURVIVOR OTR is also now available with racks and gates for livestock containment needs.
This month we continue to look at the overall service and maintentance of a truck scale. Today we look at the weighbridge and the foundation. Even the toughest scale on earth is put at risk on a poor foundation. Cracked foundations can lead to movement or settling which causes chronic calibration errors. Letting little cracks become big cracks may require removing part or all of the foundation and pouring a new one for the scale to once again weigh accurately. It is important that the end user periodically walk around their scale and do a thorough visual check of the foundation and let your service tech know of any issue that you see possibly developing. Take a look at the weighbridge or deck. Rust or crumbling concrete can weaken the scale’s structure and cause problems. Clean and paint rusted steel decks. Continue reading →
Concentrated Load Capacity, or CLC, is an industry recognized rating of a vehicle or axle load scale. The rating defines the maximum load for which the weighbridge is designed as applied by a group of two axles with a center line spaced 4 feet apart and an axle width 8 feet apart. When a CLC load is applied to the weighbridge during a National Type Evaluation Program test, the NTEP tester records the displayed weight. If the scale falls within accepted testing tolerances, the scale has that CLC weight value recorded as the CLC on the Certificate of Conformance.
The CLC rating is not a measure of weighbridge strength or rigidity, because weighbridge deflection is not measured in the NTEP test. It is irrelevant if the load weighbridge sags 1/10th of an inch, or 10 inches, as long as the scale weighs within the accepted tolerance. The scale’s CLC weight rating passes in either case. A high CLC rating could be given to an extremely flexible deck sitting on load cell mounts which are capable of accurately handling the side loading resulting from a severely sagging weighbridge.