Keithley 8009 Instruction Manual - page 5
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SAFETY PRECAUTIONS
The following safety precautions should be observed before using this product
and any associated instrumentation. Although some instruments and accessories
would normally be used with non-hazardous voltages, there are situations where
hazardous conditions may be present.
This product is intended for use by qualified personnel who recognize shock haz-
ards and are familiar with the safety precautions required to avoid possible injury.
Read the operating information carefully before using the product.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be
present on cable connector jacks or test fixtures. The American National Stan-
dards Institute (ANSI) states that a shock hazard exists when voltage levels great-
er than 30V RMS, 42.4V peak, or 60VDC are present.
A good safety practice is
to expect that hazardous voltage is present in any unknown circuit before
measuring.
Before operating an instrument, make sure the line cord is connected to a proper-
ly grounded power receptacle. Inspect the connecting cables, test leads, and
jumpers for possible wear, cracks, or breaks before each use.
For maximum safety, do not touch the product, test cables, or any other instru-
ments while power is applied to the circuit under test. ALWAYS remove power
from the entire test system and discharge any capacitors before: connecting or
disconnecting cables or jumpers, installing or removing switching cards, or mak-
ing internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the common side of
the circuit under test or power line (earth) ground. Always make measurements
with dry hands while standing on a dry, insulated surface capable of withstanding
the voltage being measured.
Do not exceed the maximum signal levels of the instruments and accessories, as
defined in the specifications and operating information, and as shown on the in-
strument or test fixture rear panel, or switching card.
Do not connect switching cards directly to unlimited power circuits. They are in-
tended to be used with impedance limited sources. NEVER connect switching
cards directly to AC main. When connecting sources to switching cards, install
protective devices to limit fault current and voltage to the card.
When fuses are used in a product, replace with same type and rating for continued
protection against fire hazard.