Keysight Truevolt Serie Mode D'emploi page 18

IEC Measurement Category II
To protect against the danger of electric shock, the Keysight Truevolt Series DMM protects the user from
AC mains power overvoltage events. When measuring AC mains, the HI and LO input terminals may be
connected to AC mains power up to 300 VAC under Measurement Category II conditions as defined
below.
IEC Measurement Category II includes electrical devices connected to AC mains power at an outlet on a
branch circuit. Such devices include most small appliances, test equipment, and other devices that plug
into a branch outlet or socket. The instrument may be used to make measurements with the HI and LO
inputs connected to AC mains power in such devices, or to the branch outlet itself (up to 300 VAC).
However, the instrument may not be used with its HI and LO inputs connected to AC mains power in per-
manently installed electrical devices such as the main circuit-breaker panel, sub-panel disconnect boxes,
or permanently wired motors. Such devices and circuits are subject to overvoltages that may exceed the
instrument's protection capabilities.
Voltages above 300 VAC may be measured only in circuits that are isolated from AC mains power. However,
transient overvoltages are also present on circuits that are isolated from AC mains power. The instrument is
designed to safely withstand occasional transient overvoltages up to 1500 Vpk when measuring voltages
greater than 300 VAC. Do not use this equipment to measure circuits where transient overvoltages could
exceed this level.
Keysight 34139A Test Lead Set
The Keysight 34139A Test Lead Set, described below, is compatible with the Truevolt Series DMMs.
Test Lead Ratings
Test Leads - 1000 V, 15 A
l
Fine Tip Probe Attachments - 300 V
l
3A Mini Grabber Attachment - 300 V, 3 A
l
SMT Grabber Attachments - 300 V, 3 A
l
Operation
The Fine Tip, Mini Grabber, and SMT Grabber attachments plug onto the probe end of the Test Leads.
Maintenance
If any portion of the Test Lead Set is worn or damaged, do not use. Replace with a new Keysight 34139A
Test Lead Set.
If the Test Lead Set is used in a manner not specified by Keysight Technologies, the protection provided by
the Test Lead Set may be impaired. Also, do not use a damaged or worn Test Lead Set. Personal injury or
death may result.
Keysight Truevolt Series Operating and Service Guide
Safety and Regulatory Information
19