Technical Specifications

SPEEDMASS® In-Motion Weighing System

Accuracy Based on total train Speed up to 20 Km/Hr ± 1%
Method of weighing Wheel by wheel or Full Draught Weighing
Active length of weighing section 500 mm
Mechanical Construction No
Construction and Installation Downtime 8 hours - no civil work
Number of loadcells/transducers

2 transducers externally manufactured onto two sections of standard rail - each nominally 3m in length

2 double transducers for full draught weighing manufactured onto two sections of standard rail - each nominally 3m in length

Division Size 20 kg
Maximum gradient 1:300
Temperature Compensation Self Temperature compensation 

SPEEDMASS® Controller

Hardware Platform Intel 486/Pentium processor with 4Mb RAM – Single Board computer with 8 Mb on board Flash Disk
A/D Conversion Dual/Quad 16 bit 100kHz 1 part in 65000
Digital Inputs Opto Isolated 5-30VDC - hardware interrupt generation - 12 Inputs
Digital Outputs Opto Isolated, OPTO22 or SPDT relays - 12 Outputs
Communications RS232/RS422/RS485
Operator Input  
Customers/Products Databases in standard DBF/Paradox format hold customer and product information
Weighment Details User defined input screen for the manual input of weighment details
Modes of operation  
Manual Operator definition of a complete weighing cycle
Automatic Use of sensors to start and end weighments
Track switches Only used if all other elimination does not work
Inductive loop detectors Dual detectors used to detect presence and direction of train
AVI Automatic Vehicle Identification using transponders for vehicle elimination and/or vehicle tracking
Calibration Static

Initial settings are determined by DIP switches on the loadcell amplifier. Final calibration is performed digitally

In motion calibration performed using a train of known mass as per the assize regulations

Dynamic Offsets Dynamic offsets can be set for both directions of travel
Directional Speed Dynamic correction factors can be set for any number of desired speed bands
Diagnostics The following routines can be used to test the controller: Digital I/O, Analogue I/O, Printer, Serial port.
Overvoltage/Lightning protection Surge protection at the rail and/or the control room depending on the distance. Faraday Cage protection of weighbridge and control room linked by dedicated earth cable
Loadcell amplifier 1 to 4 channel isolated/non-isolated amplifier Upto 10 60R loadcells per amplifier


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Contact Us

If you'd like to a learn more about our systems and services please contact us on the details below.

Tel +27 11 793 2466

Mail russell@controlsolutions.co.za