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Safety
Precautions
The following safety precautions should be obse1ved before using this product and any asso-
ciated instrumentation. Although some instruments and accessories would normally be used
with non-hazardous voltages, there arc situations where hazardous conditions may be present.
This product is intended for use
by
qualified personnel who recognize shock hazards and are
familiar
with
the safety precautions required to avoid possible injury. Read the operating in-
fonnation carefully before using the product.
The lypcs of product users are;
Responsible body is the individual or group responsible for the use and mainlenance of
equipment, for ensuring that the equipment is operated within lls specifications and operat-
ing limits, and for ensuring that operators are adequately trained.
Operators use the
product for
its intended
function.
They must be trained in
electrical
safety
procedures and
proper
use of the instrument. They must be protected from electric shock and
contact with hazardous live circuits.
Maintenance
personnel
perform
routine pro.ccdurcs on the product to keep
it
operating, for
example, setting
the line voltage or replacing
consumable materials. Maintenance procedures
arc
described in !he
manual.111e
procedures
explicitly state
if
the
operator may
perform
them.
Otherwise, they should be
performed only
by
service
personnel.
Service personnel
arc trained
to work on live circuits,
and
perform safe installations
and
re-
pairs of
products.
Only properly trained service personnel may perfonn installation and ser-
vice procedures.
Exercise extreme caution when a shock hazard is present. Lclhal voltage may be present on
cable connector jacks
or
test fixtures.
111c
American National Standards Institute (ANSI)
states that a shock hazard exists when voltage levels greater than 30V RMS, 42.4V
peak,
or
60VDC
are present.
A good safety practice Is to expect that hazardous voltage is prtscnt
in an)' unknown circuit before measuring.
Users of this product must
be
protected from electric shock at all times. 11re responsible body
must ensure that users are prevented access and/or insulalcd from every connection point. In some
cases. connections must be
exposed
to potential human contact. Product users in these circum-
stances
must
be trained to protect themselves from the risk of
electric
shock.
If
the circuit is ca-
pable of operating at or above l 000 volts, no conductive part of
the
circuit may
be
exposed.
As described in tile International Eloctrotechnical Commission (IEC) Standard !EC 664, dig-
ital multimeter measuring drcuits (e.g., Keithley Modcis 175A, 199, 2000, 2001, 2002, and
2010} are Installation Category IL AH other instruments' signal tenninals are Installation Cat-
egory I and
must
not be connected to
mains,
Do
not connect
switching
cards
directly to
unlimited
power
circuits. They are intended
to be
used with
impedance limited sources. NEVER connect switching cards directly to AC mains.
When connecting sources to switching cards, install
protective devices
to Jimit fault current
and voltage to lhc
card.
Before operating an instrument, make
sure
the line cord is connected to a property 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 lhe product, lest cables, or any other instruments while pow-
er 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, instaning or
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