Intrinsically safe tachograph

Intrinsically safe tachograph

1) Tachograph designed for and fitted to goods vehicle wired to meet special requirements for petroleum and other dangerous goods carrying vehicles (in common terms, to meet 'petroleum regulations').

Such vehicles have battery master cut-off switches which isolate current to avoid electrical discharge. Where tachographs are fitted a continuous current supply is necessary to operate the clock so a limited by-pass of the master switch is arranged via a barrier device in accordance with exacting standards imposed by BASEEFA.

Source: David Lowe. The Dictionary of Transport and Logistics. Kogan Page, 2002. – P.128-129 (288 p.)