SI Onboard, a brand of the VPG on-board weighing product line and part of the Vishay Precision Group, has introduced what is said to be the first digital on-board weighing system in North America to be based on the CAN standard and to feature tilt compensation.

The new SI Onboard 9150 provides high accuracy regardless of truck position, the company says. It also features simple calibration through setup wizards; detailed, real-time diagnostics; and a graphic color TFT display.

It’s useful for underbody on-board weighing in a broad range of truck makes, models, and applications — including forestry/logging, waste management and recycling, freight, and bulk hauling. By using digital communication instead of an analog signal, the system is said to offer a higher immunity to electromagnetic noise and better performance under high temperatures and humidity.

The 9150  provides gross or net vehicle weight as well as axle-group loading and overload alarms for the truck and trailers. Its tilt compensation measures the tilt angle of the truck and trailer in both pitch and roll axes. The measured angles are used to compensate the readings from the load cells to ensure accurate weighing regardless of the truck position.

The digital CAN system is composed of two components: the 9150 meter to provide the user interface and the 9150 JBOX/transmitter to integrate the interface with the load cells, signal processing, diagnostics, and the local functionality needed for setup and calibration per trailer. The 9150 meter features a bright 4.3 in. graphic color TFT display with LED backlighting to display weight, configuration, and diagnostic results. The meter’s RS-232 interface allows for connection to a printer or in-cab PC, while a USB interface enables backup and restore of setup parameters and user data.

For intuitive setup using the 9150’s password-protected wizards, the operator simply selects the relevant configuration from the drop-down menu, and the system automatically configures the needed parameters. Up to eight 9150 transmitters can be added to the system to support an additional four to eight trailers. For easy connection of the trailers, including hot swaps, all operational and setup parameters are stored in the 9150 transmitter. Once the trailer is connected to the truck, the 9150 meter reads the required parameters from the transmitter and updates the system accordingly.

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