Fluke 709 User Manual page 17


Battery.
Measurement Category II is
applicable to test and measuring
CAT II circuits connected directly to
utilization points of low voltage
mains installation.
Measurement Category IV is applicable to test and measuring circuits connected at the source of the
CAT IV
building's low-voltage MAINS installation.
The CAT ratings apply to the handheld accessories only. The Product is rated to 30 V maximum.
Table 1. Symbols (cont.)

Double insulated
Measurement Category III is applicable to test and
CAT III measuring circuits connected to the distribution part of
the building's low-voltage MAINS installation.
Precision Loop Calibrator
Symbols
5