MIL-DTL-3971F, DETAIL SPECIFICATION: METERS, TIME TOTALIZING, NON-HERMETICALLY SEALED, ELECTRICAL: GENERAL SPECIFICATION FOR (18 MAR 2008)

MIL-DTL-3971F, DETAIL SPECIFICATION: METERS, TIME TOTALIZING, NON-HERMETICALLY SEALED, ELECTRICAL: GENERAL SPECIFICATION FOR (18 MAR 2008)., This specification covers the general requirements for electrically operated non- hermetically sealed meters that automatically measure, and cumulatively register the total operating or idle time of the circuit, machine or system to which connected.