Light Loading Belt Scales Offer Superior Performance for Light Load Applications

Available with 2,3,4, and 6 idlers, the RF-ALA belt scales were specifically designed for high accuracy (1/10 to 1/2% typical) inventory control and throughput totalization of light scale loading applications such as Biomass, wood chips, saw dust, tobacco and land refuse. The belt scale weigh bridge features exclusive rocking flexure suspension in the approach and approach/retreat configurations. Measurement sensitivity is high while deflection is low.  The single load cell is isolated from the error-inducing effects of extraneous lateral forces, off-center loading, foundation distortion, inclination hold-back forces, and high sporadic shocks and overloads. Tare load is mass counterbalanced to create superior signal -to-noise ratio in weight sensing, orders of magnitude better than belt scale designs supporting full tare load on the load sensor.

The RF-ALA belt scales feature highly advanced and extremely robust weight sensing technology that is based on the marriage of the weighbridge, weight transducer (load cell), embedded temperature sensing and proprietary linearizing and temperature compensating control algorithms.

To ensure the most accurate weighing, Thayer has installed a secondary lever system on its weigh belts.  The system utilizes stainless steel aircraft cables as flexural elements to transmit and FOCUS pure tension forces to the load cell. Since the cables are non-extendable, but rather laterally yieldable connecting links the lever can align itself under conditions of varying stringer distortion. This reduces the structural redundancy of the suspension systems, decreasing the risk of deflection and rotation.  
Additional benefits of the secondary lever system include:

• Mass can be added to counterbalance the dead load (idler support frame, idlers, belts) without loading down the suspension pivot
• Load sensors react only to the net material load since complete mass counterbalance of the dead load zone is achieved
• By positioning the load cell correctly relative to the secondary lever, load cell size is matched to the net loading
• Idler deflection is reduced and additional immunity to errors associated with belt tension is provided as a result of the increased lever ratio of the secondary lever
• This unique system is not affected by dirt, shocks or vibration, and can withstand overloads in excess of 1,000 pounds without causing damage or affecting calibration

Through the use of various Thayer technologies the RF-ALA weigh belts are easy to use, rugged and reliable and provide extremely accurate measurement that is unmatched in the industry.   

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