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Safety Summary
The following safety precautions apply to both operating and maintenance
personnel and must be followed during all phases of operation, service,
and repair of this instrument.
Before applying power to this instrument:
Read and understand the safety and operational information in
this manual.
Apply all the listed safety precautions.
Verify that the voltage selector at the line power cord input is set
to the correct line voltage. Operating the instrument at an
incorrect line voltage will void the warranty.
Make all connections to the instrument before applying power.
Do not operate the instrument in ways not specified by this
manual or by B&K Precision.
Failure to comply with these precautions or with warnings elsewhere in
this manual violates the safety standards of design, manufacture, and
intended use of the instrument. B&K Precision assumes no liability for a
customer’s failure to comply with these requirements.
Category rating
The IEC 61010 standard defines safety category ratings that specify the
amount of electrical energy available and the voltage impulses that may
occur on electrical conductors associated with these category ratings. The
category rating is a Roman numeral of I, II, III, or IV. This rating is also
accompanied by a maximum voltage of the circuit to be tested, which
defines the voltage impulses expected and required insulation clearances.
These categories are:
Category I (CAT I): Measurement instruments whose measurement inputs
are not intended to be connected to the mains supply. The voltages in the
environment are typically derived from a limited-energy transformer or a