scope:

The scope of this European Standard is restricted to the on route in motion measurement of quasi-static vertical wheel forces and derived quantities on vehicles in service operation. Derived quantities can be: - vertical wheelset forces (axle loads); - side to side wheel force differences inside a wheel set, bogie, vehicle or train set; - mean axle load of a running gear, vehicle or train set; - overall vehicle mass or train mass. This standard is not concerned with the measurement of: - dynamic wheel force or derived quantities; - wheel condition (i. e. shape, profile, flats); - lateral wheel force; - combination of lateral and vertical wheel forces. The standard defines accuracy classes for measurements to be made at any speed greater than 5 km/h within the calibrated range, which may be up to line speed. The aim of this standard is to obtain measurement results that give representative values for the distribution of the vertical wheel forces of a running vehicle, which will be similar to what can be obtained from a standing vehicle under ideal conditions. This standard does not impose any restrictions on the types of vehicles that can be monitored, or on which networks or lines the measuring system can be installed. The standard lays down minimum technical requirements and the metrological characteristics of a system for measuring vertical wheel forces and derived quantities of a vehicle. Also defined are accuracy classes for these parameters. The measuring system proposed in this standard should not be considered as being safety critical. If the measuring system is connected to track signalling, a train monitoring or a train control system then requirements that are not part of this standard may apply.