12
3.
OPERATION
This section of the manual contains information required to use and operate the
260-8 in a safe and proper manner.
Multifunction instruments (VOM’s) such as the 260-8 are intended as general pur-
pose measuring Instruments for use in low power circuitry such as found in con-
sumer appliances, TV and radio receivers, and in general laboratory applications.
Their use is not recommended in high voltage, high power circuitry where opera-
tor errors and inadequate personal protective measures could result in serious
injury from arcing or explosion. Such circuitry is found in industrial or commercial
applications such as induction (r-f) heaters and broadcast transmitters, power sub-
stations and distribution centers, x-ray equipment, large motor controls, etc. Work-
ing in the high voltage section of such equipment requires single-function, often
specially designed instruments operated by specially trained personnel who use
appropriate protective equipment and procedures.
3.1
Safety Precautions
The following precautions are suggestions and reminders of commonly recog-
nized safe practices as well as specific hazards to be avoided, and are not implied
to be sufficient to ensure the safety of untrained personnel in all circumstances.
Neither is this manual a substitute for technical manuals covering the equipment
being measured. Always refer to the equipment manual and its specific warnings
and instructions and observe them as well as those contained herein.
a.
The 260-8 should only be used by personnel qualified to recognize shock
hazards and trained in the safety precautions required to avoid possible in-
jury.
b.
Do not connect any terminal of this Instrument to a circuit point at which a
voltage exceeding 1000 volts AC or DC may exist with respect to earth ground.
(Refer to Table 1-1, item 16.)
c.
Turn off power and discharge any capacitors in the circuit to be measured
before connecting to or disconnecting from it.
d.
Before using this Instrument, check accessories, if any, and test leads for
missing, damaged, deteriorated or otherwise faulty insulating parts. Do not
use, or permit the use of, equipment with faulty insulation until it has been
properly repaired.
e.
Always wear safety glasses when working in electrical circuitry.
f.
Do not work alone on high voltage circuits. Make certain that someone ca-
pable of giving aid is watching nearby.
g.
Do not handle the Instrument, its test leads, or the circuitry while high voltage
is being applied.
h.
Hands, shoes, floor, and workbench must be dry. Avoid making measure-
ments under humid, damp, or other environmental conditions that could ef-
fect the dielectric withstanding voltage of the test leads or Instrument.
i.
Do not change switch settings or test lead connections while the circuit is
!