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
common side
of
the
circuit
under test
or
power
line
(eatth) ground, Always make measurements with
dry
hands
while
standing on a
dry,
insulated surface capable of withstanding the voltage being measured.
The instrument and accessories must
be
used
in
accordance with its specifications and
op-
erating instructions or the safety
of
the equipment may
be
impaired.
Do
not
exceed
the
maximum
signal levels of the instmments
and
accessories,
.as
defined
in
the specifications and operating infonnation,
and
as
shown
on
the instrument
or
test
fixture
panels, or switching
carcl.
When
fuses
are
used
in
a product, replace with same type and rating
for
continued protection
against
fire
hazard.
Chassis connections must only be
used
as
shield connections
for
measuring circuits, Nar
as
safety earth ground connections.
If
you
are using a test fixture, keep
the
lid closed while power
is
applied
to
the device under
test. Safe operation requires
the
use
of a
lid
interlock.
lf
a @screw
is
present, connect it
to
safety earth ground using the wire recommended
in
the user documentation.
TI1e
.&symbol
on
an
instrument indicates that
the
user should refer
to
the
operating
in-
structions located
in
the manual.
The&,
symbol
on
an
instrnment
shows
that
it
cm1
source
or measure
1000
volts
or
more,
in-
cluding
the
combined
effect
ofnonnal
m1d
common
mode
voltages.
Use
stm1dard
safety
precau-
tions
to
avoid
personal contact
with
these
voltages.
TI1c
WARNING heading
in
a manual explains dangers that might result
in
personal injury or
death. Always read
the
associated infonnation very carefully before performing the indicated
procedure.
The CAUTION heading
in
a manual explains
hazard'!
that could damage the instrument.
Such damage
may
invalidate
the
warranty.
lnstn.nnentatiou and accessories shall not be connected to humans.
Before performing
any
maintenance, disconnect the line cord
and
all
test cables.
To
maintain protection
from
electric shock
and
fire,
replacement components
in
mains
cir-
cuits, including the power transfonner, test leads,
and
input jacks,
must
be
purchased
from
Keithley
Instruments. Standard
fuses,
with applicable national
safety
approvals,
may
be
used
if the rating and type
are
the same. Other components that are not safety related
may
be
pur-
chased
from
other suppliers
as
long
as
they are equivalent
to
the
01iginal
component. (Note
that selected parts should be purchased only through Keithley Instruments
to
maintain accu-
racy
and functiona1ity of the product.)
1f
you
are
unsure about
the
applicability of a replace-
ment component, call a Keithley Instruments office for infonnation.
To
clean
an
instrument, use a damp cloth or mild, water based cleaner. Clean the exterior
of the instrument only.
Do
not apply cleaner directly
t6
the instrument or allow liquids
to
enteror spill on the instrument. Products that consist
of
a circuit board with
no
case or chas-
sis (e.g., data acquisition board for installation
into
acomputer) should never require clean-
ing ifhandled according
to
instructions, If the board becomes contaminated and operation
is
affected, the board should be returned
to
the factory
for
proper cleaning/servicing.
Rev.
2/99
