Measurement Category; Measurement Category Definitions - Keysight Infiniium 9000 Series Service Manual

1
General Information

Measurement Category

•
•
•

Measurement Category

Measurement Category II, III, or IV.

Measurement Category Definitions

The "Not rated for CAT II, III, IV" measurement category is for measurements
performed on circuits not directly connected to MAINS. Examples are
measurements on circuits not derived from MAINS, and specially protected
(internal) MAINS derived circuits. In the latter case, transient stresses are variable;
for that reason, the transient withstand capability of the equipment is made known
to the user.
Measurement category II is for measurements performed on circuits directly
connected to the low voltage installation. Examples are measurements on
household appliances, portable tools and similar equipment.
Measurement category III is for measurements performed in the building
installation. Examples are measurements on distribution boards, circuit-breakers,
wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the
fixed installation, and equipment for industrial use and some other equipment, for
example, stationary motors with permanent connection to the fixed installation.
Measurement category IV is for measurements performed at the source of the
low-voltage installation. Examples are electricity meters and measurements on
primary overcurrent protection devices and ripple control units.
SAFETY CLASS 1 PRODUCT
WARNING
This is a Safety Class 1 Product (provided with a protective earth ground
incorporated in the power cord). The mains plug shall only be inserted in a socket
outlet provided with a protective earth contact. Any interruption of the protective
conductor inside or outside of the product is likely to make the product dangerous.
Intentional interruption is prohibited.
16
"Measurement Category"
"Measurement Category Definitions"
"Maximum Input Voltages"
The Keysight Infiniium 9000 Series oscilloscopes are not rated for
on page 16
on page 16
on page 17
Infiniium 9000 Series Oscilloscopes Service Guide