Operating Environment - Omega CA450 User Manual

2. Operating Environment

WARNING
■ Measurement Category of CA450 and Lead cables
There are restrictions on the maximum voltage level at which the CA0 can be used.
These restrictions are based on the measurement categories specified by the safety
standards.
AC/DC 000 V for CAT.III, AC/DC 600 V for CAT.IV
The terminals for current measurement and output and the accessory lead cables
fall under category I.
Do not use the above terminals and lead cables for measuring points that fall under
measurement categories II, III, or IV.
■ Category of Test leads
With Caps:
Without Caps: 000V 0A CAT.II/600V 0A CAT.II
Measurement
Category
For measurements performed on circuits not
I CAT.I
directly connected to MAINS
For measurements performed on circuits
II CAT.II
directly connected to the low voltage installation
For measurements performed in the building
III CAT.III
installation.
For measurements performed at the source of
IV CAT.IV
the low-voltage installation.
000V 0A CAT.III/600V 0A CAT.IV
Description
Entrance
Cable
CAT .IV
Fixed Equipment,
etc.
Internal Wiring
Distribution
CAT . III
CAT . II
Board
CAT .I
Outlet
Equipment
9
Remarks
Circuits not connected to a
mains power source
Appliances, portable
equipment, etc.
Distribution board, circuit
breaker, etc.
Overhead wire, cable
systems, etc.