Safety Considerations - Keysight U1242C Service Manual

Safety Considerations

Read the information below before using this instrument.
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 for design, manufacture, and intended use of the instrument. Keysight
Technologies assumes no liability for the customer's failure to comply with these
requirements.
– Do not exceed any of the measurement limits defined in the specifications
WARNING
– Do not use the multimeter if it is damaged. Before you use the
– Inspect the test leads for damaged insulation or exposed metal. Check
– Do not operate the multimeter around explosive gas, vapor, or wet
– Do not apply more than the rated voltage (as marked on the multimeter)
– Never use the multimeter in wet conditions or when there is water on the
– Before use, verify the multimeter's operation by measuring a known
– When measuring current, turn off the circuit power before connecting the
– When servicing the multimeter, use only the specified replacement parts.
– Use caution when working above 60 V DC, 30 V AC rms, or 42.4 V peak.
4
to avoid instrument damage and the risk of electric shock.
multimeter, inspect the case. Look for cracks or missing plastic. Pay
particular attention to the insulation surrounding the connectors.
the test leads for continuity. Replace damaged test leads before you use
the multimeter.
environments.
between terminals, or between terminal and earth ground.
surface. If the multimeter is wet, ensure that the multimeter is dried only
by trained personnel.
voltage.
multimeter in the circuit. Remember to place the multimeter in series
with the circuit.
Such voltages pose a shock hazard.
Keysight U1241C/U1242C Service Guide