Keysight M5201A, Startup Manual

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M5201A PXIe Downconverter Modules Startup Guide 71
Troubleshooting and Safety information 4
Table 11 Description of Measurement Category II, III and IV
Servicing
Equipment and accessories
Measurement Category Description
II Applicable to testing and measuring circuits connected directly to utilization points (socket outlets and similar points) of
the low-voltage mains installation.
Example: Measurements on MAINS CIRCUITS of household appliances, portable tools and similar equipment and on the
consumer side only of socket-outlets in the fixed installation.
III Applicable to test and measuring circuits connection to the distribution part of the building’s low-voltage mains
installation. To avoid risks caused by the hazards arising from these higher short-circuit currents, additional insulation
and other provisions are required.
Example: Measurements on distribution boards (including secondary meters), photovoltaic panels, circuit breakers,
wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation, equipment for
industrial use and some other equipment such as stationary motors with permanent connection to the fixed installation.
NOTE: For equipment that is part of a fixed installation, the fuse or circuit breaker of the installation can be considered to
provide adequate protection against short-circuit currents.
IV Applicable to test and measuring circuits connected at the source of the building’s low-voltage mains installation. Due to
these high short-circuit currents, which can be followed by a high energy level, measurements made within these
locations are extremely dangerous. Great precautions shall be made to avoid any chance of a short circuit.
Example: Measurements on devices installed before the main fuse or circuit breaker in the building installation.
WARNING
Servicing of the modules must be performed by qualified personnel
only. To avoid electrical shock, do not perform any servicing manually.
Return the module to Keysight Service Center.
WARNING
For safety reasons, only Keysight approved equipment and accessories
should be used with the module.
NOTE
Position chassis to ensure easy access to remove the modules.