Technical data

VI U3402A User’s and Service Guide
General Safety Information
The following general safety precautions must be observed during all
phases of operation, service, and repair of this instrument. Failure to
comply with these precautions or with specific warnings elsewhere in this
manual violates safety standards of design, manufacture, and intended
use of the instrument. Keysight Technologies assumes no liability for the
customer’s failure to comply with these requirements.
WARNING
• Do not exceed any of the measurement limits defined in the specifications to
avoid instrument damage and the risk of electric shock.
• Do not defeat power cord safety ground feature. Plug in to a grounded (earthed)
outlet.
• Do not use instrument in any manner that is not specified by the manufacturer.
• Double-check the instrument’s operation by measuring a known voltage.
• For current measurement, turn off circuit power before connecting the
instrument to the circuit. Always place the instrument in series with the circuit.
• When connecting probes, always connect the common test probe first. When
disconnecting probes, always disconnect the live test probe first.
• Do not measure more than the rated voltage (as marked on the multimeter)
between terminals, or between terminal and earth ground.
• Do not use repaired fuses or short-circuited fuse-holders. For continued
protection against fire, replace the line fuses only with fuses of the same voltage
and current rating and recommended type.
• Do not service or perform adjustments alone. Under certain conditions,
hazardous voltages may exist, even with the instrument switched off. To avoid
dangerous electric shock, service personnel must not attempt internal service or
adjustment unless another person, capable of rendering resuscitation or first aid,
is present.
• Do not substitute parts or modify instrument to avoid the danger of introducing
additional hazards. Return the instrument to Keysight Technologies Sales and
Service Office for service and repair to ensure the safety features are maintained.
• Do not operate damaged instrument as the safety protection features built into
this instrument may have been impaired, either through physical damage,
excessive moisture, or any other reason. Remove power and do not use the
instrument until safe operation can be verified by service-trained personnel. If
necessary, return the instrument to Keysight Technologies Sales and Service
Office for service and repair to ensure the safety features are maintained.