18-14
IM 701240-01E
3 The measurement category of this instrument's signal input terminals varies depending on the modules that are installed.
Use the instrument within the scope of the measurement category that corresponds to the module specifications. Do not use
the instrument outside the scope of the measurement category that corresponds to the module specifications. The scope of
each measurement category is as follows.
Measurement category Other (O) applies to measurement of circuits that are not directly connected to a main power supply.
This category applies to measurement of secondary electric circuits in equipment across a transformer. If the module
specifications fall under measurement category O, the estimated transient voltage that may appear at the signal input
terminals is 1500 V.
Measurement category II applies to measurement of circuits, such as household electric appliances and portable electric
tools, that are connected to low-voltage installations.
Measurement category III applies to measurement of facility circuits, such as distribution boards and circuit breakers.
Measurement category IV applies to measurement of power source circuits, such as entrance cables to buildings and cable
systems, for low-voltage installations.
4 Pollution Degree applies to the degree of adhesion of a solid, liquid, or gas which deteriorates withstand voltage or surface
resistivity. Pollution Degree 2 applies to normal indoor atmospheres (with only non-conductive pollution).
5 Use cables of length 3 m or less.
6 Use cables of length 30 m or less.
18.11 General Specifications
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