Technical data

Characteristics and Specifications 1

4000 X-Series Oscilloscopes Service Guide 15

Measurement Category

The InfiniiVision 4000 X- Series oscilloscope is intended to

be used for measurements in Measurement Category I.

Measurement Category Definitions

Measurement category I 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.

WARNING

Use this instrument only for measurements within its specified

measurement category.