Specifications

G4500 BLACKBOX PORTABLE OPERATIONAL MANUAL
August 2010
Elspec | The Hardware
27
Grounding
The BLACKBOX Portable contains two independent ground systems:
 Measurement ground: The reference ground for a measured electrical system
 Safety ground: The line cord ground, same potential to all enclosure and connectors-
related metal parts
The ground systems are internally isolated to avoid ground loops when ex-
ternally they could be safely connected to the same or different ground sys-
tems.
Maximum permitted voltage between Safety and
Measurement grounds is 2kV DC or 1.5kV AC.