This International Standard describes the steps recommended to complete a loop check,
which comprises the activities between the completion of the loop construction (including
installation and point-to-point checks) and the start-up of cold commissioning. This standard
is applicable for the construction of new plants and for expansion/retrofits (i.e. revamping) of
E&I installations in existing plants (including PLC, BAS, DCS, panel-mounted and field
instrumentation). It does not include a detailed checkout of power distribution systems, except
as they relate to the loops being checked (i.e. a motor starter or a power supply to a four-wire
transmitter).