Monitoraggio
L'impianto di frenatura ad aria compressa può essere monitorato tramite gli appositi manometri, solitamente situati nella cabina di un'unità di trazione.
La pressione del serbatoio principale dovrebbe sempre essere pari o prossima agli 8 bar ed è automaticamente ricaricata dal compressore.
Brake pipe operating pressures are between 3.5 bar when the brake is fully applied and 5 bar when it is fully released. Brake pipe pressure is usually represented by a black or white needle on the brake pipe gauge, and its pressure is controlled by the train brake control device.
Brake cylinder pressure goes between 0 and 3.75 bar and represents the actual braking force applied to the wheels. Brake cylinder pressure is usually represented by a red needle on the brake pipe gauge.
Since gauges display pressures relative to the atmospheric pressure, the actual absolute pressures are approximately 1 bar higher than what's indicated on the gauge and used in technical documentation.