User manual

5
D
o not clean the instrument, its switches, or its terminals with contact cleaners, abrasives, lubricants,
solvents, acids/bases, or other such chemicals. Clean the instrument only with a clean dry lint-free cloth
or as instructed in this manual.
Not for critical applications
This instrument is not authorized for use in contact with the human body or for use as a component in a
life-support device or system.
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