B&K PRECISION BK5493C Инструкция по эксплуатации онлайн [5/57] 528287

Do not touch live circuits

Instrument covers must not be removed by operating personnel. Component replacement and

internal adjustments must be made by qualified service-trained maintenance personnel who

are aware of the hazards involved when the instrument's covers and shields are removed.

Under certain conditions, even with the power cord removed, dangerous voltages may exist

when the covers are removed. To avoid injuries, always disconnect the power cord from the

instrument, disconnect all other connections (for example, test leads, computer interface

cables, etc.), discharge all circuits, and verify there are no hazardous voltages present on any

conductors by measurements with a properly-operating voltage-sensing device before touching

any internal parts. Verify the voltage-sensing device is working properly before and after making

the measurements by testing with known-operating voltage sources and test for both DC and AC

voltages. Do not attempt any service or adjustment unless another person capable of rendering

first aid and resuscitation is present.

Do not insert any object into an instrument's ventilation openings or other openings.

Hazardous voltages may be present in unexpected locations in circuitry being tested when a

fault condition in the circuit exists.

Fuse replacement

Fuse replacement must be done by qualified service-trained maintenance personnel who are

aware of the instrument's fuse requirements and safe replacement procedures. Disconnect the

instrument from the power line before replacing fuses. Replace fuses only with new fuses of the

fuse types, voltage ratings, and current ratings specified in this manual or on the back of the

instrument. Failure to do so may damage the instrument, lead to a safety hazard, or cause a fire.

Failure to use the specified fuses will void the warranty.

Servicing

Do not substitute parts that are not approved by B&K Precision or modify this instrument.

Return the instrument to B&K Precision for service and repair to ensure that safety and

performance features are maintained.