Keithley 237

Model
236/237/238s
remain
powered
up.
Turning
off
one
or
more
Model236/237/238s
in
the
test system
may
result
in
erratic IN-
TERLOCK
operation.
That
is,
an
operational
Model236/237/238
may
not
go
into
standby
when
the
lid
of
the
system
test
fixture
is
opened.
This
condition exposes
the
operator
to
potentially
lethal
voltages
that
could
re-
sult
in
injury
or
death.
As a general
role
of
safety
for
multiple
unit
interlocked test systems,
either
keep
all
Model
236/237/2388
powered
on,
or
turn
them
all
off.
+
+
SECTION I
Getting
Started
@ LINE
FUSE-
Provides protection
on
the ac
power
line input.
@
CAL
LOCK
- Source Measure
Unit
calibration
cannot
be
saved
with
this
pushbutton
switch
in
the OUT
position.
@
IEEE-488 - Connects the instrument to the
IEEE-488 bus.
1-17