The following safety precautions should be observed before using
this product and any associated instrumentation. Although some in-
struments and accessories would normally be used with non-haz-
ardous voltages, there are situations where hazardous conditions
may be present.
This product
is
intended for use by qualified personnel who recog-
nize shock hazards and are familiar with the safety precautions re-
quired to avoid possible injury. Read the operating information
carefully before using the product.
The types
of
product users are:
Responsible body
is
the individual or group responsible for the use
and maintenance
of
equipment, for ensuring that the equipment
is
operated within its specifications and operating limits, and for en-
suring 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 instru-
ment. They must be protected from electric shock and contact with
hazardous live circuits.
Maintenance personnel perform routine procedures on the product
to
keep it operating, for example, setting the line voltage or replac-
ing consumable materials. Maintenance procedures are described in
the manual. The procedures explicitly state
if
the operator may per-
form them. Otherwise, they should be performed only by service
personnel.
Service
personnel are trained to work on live circuits, and perform
safe installations and repairs
of
products.
Only
properly trained ser-
vice personnel may perform installation and service procedures.
Keithley products are designed for use with electrical signals that
are rated Installation Category I and
Installation Category II, as de-
scribed in the International Electrotechnical Commission (IEC)
Standard IEC
60664. Most measurement, control, and data
I/0
sig-
nals are Installation Category I and must not be directly connected
to mains voltage or to voltage sources with high transient over-
voltages. Installation Category II connections require protection for
high transient over-voltages often associated with local
AC
mains
connections. The user should assume all measurement, control, and
data
I/0
connections are for connection
to
Category I sources un-
less otherwise marked or described in the Manual.
Safety
Precautions
Exercise extreme caution when a shock hazard
is
present. Lethal
voltage may be present on cable connector jacks or test fixtures. The
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
present
in
any
unknown
circuit before
measuring.
Users
of
this product must be protected from electric shock at all
times. The responsible body must ensure that users are prevented
access and/or insulated from every connection point. In some cases,
connections must be exposed to potential human contact.
Product
users in these circumstances must be trained
to
protect themselves
from the risk
of
electric shock.
If
the circuit is capable
of
operating
at or above 1000
volts,
no
conductive
part
of
the
circuit
may
be
exposed.
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 con-
necting sources to switching cards, install protective devices to lim-
it
fault current and voltage to the card.
Before operating an instrument, make sure the line cord
is
connect-
ed to a properly grounded power receptacle. Inspect the connecting
cables, test leads, and jumpers for possible wear, cracks, or breaks
before each use.
When installing equipment where access to the main power cord
is
restricted, such as rack mounting, a separate main input power dis-
connect device must be provided, in close proximity to the equip-
ment and within easy reach
of
the operator.
For maximum safety, do not touch the product, test cables, or any
other instruments 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 jump-
ers, installing or removing switching cards, or making internal
changes, such as installing
or
removing jumpers.
Do not touch any object that could provide a current path
to
the
com-
mon 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.
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