“Systems that measure suspension deflection or do not measure all load paths create a wider accuracy bandwidth, and therefore the safe load target is lower,” Elefson explains. “That is why a system that uses the most accurate and repeatable technology provides the most reliable payback.”
“Typically, the LoadMan system can provide less than 1% error,” notes Housley. “The same accuracy is also provided on individual axle group weights. “
Systems prove reliable
Adventure Trucking reports that its LoadMan Systems have proven reliable. “We really don’t have a lot of problems with anything,” says Chandler. The company might replace a couple of load sensors a year. “Our biggest problem is drivers that start pushing too many buttons.”
“Typically maintenance is very low, with calibration recommended annually,” says Housley.
“Maintaining an onboard system will vary between applications, but typically consists of ensuring that the load cells/transducers do not become bound up with debris and that the components remain tight,” says Riley. “All SI Onboard systems are completely self diagnostic with regard to component monitoring. Periodic calibration is usually not necessary. The frequency of re-calibration is a factor of the application, as well.”
Many systems will not need recalibration once properly installed. “With our systems, there is a one-time calibration,” says Panagapko. “The initial calibration does not have to change unless something in the suspension system is changed. Our scales also maintain accuracy through temperature extremes.”
“Maintaining a load cell-based on-board scale system is not much different than normal dump truck maintenance,” says Elefson. “The hinge points should be greased like they are during normal dump truck maintenance. Also, the wiring should be protected so that it is not snagged or cut during normal operation.”
A load cell based system often does not require re-calibration unless the truck configuration itself changes. A secondary suspension deflection-type system requires more maintenance and calibration as the components and technology are more susceptible to the rigors of operation.