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Model
1920
General
Information
SECTION 1.
GENERAL INFORMATION
l-l.
INTRODUCTION
l-2.
The Keithley
Model
1920
is
a True
Root
Mean Square
(TKMS) AC plug-in
option
for
the
Models
192
and
191.
The 1920 enables
the
191 or
192 to
measure
the
TKMS value
of an AC
siynal.
When the
1920
is
installed
in
the
Model
192
an ACtUC function
is
available.
The
Model
1920
has four
ranges
on which
an AC siynal
can
be measured.
It
is
field
installable.
1-3.
Warranty
Information
l-4.
The warranty
is
yiven
on the
inside
front
cover
of this
manual.
If
there
is
a need
to
exercise
the
Warranty,
contact
the
Keithley
Representative
in your
area
to
determine
the
proper
action
to
be taken.
Keithley
maintains
complete
repair
and calibration
facilities
in
the
United
States,
West tiermany,
tireat
Britain,
France,
the
Netherlands,
Switzerland
and Austria.
Information
concerning
the
application,
operation
or service
of
your
instrument
may be directed
to
the
applications
engineer
at
any of
the
above
locations.
Check
the
inside
front
cover
of
this
manual
for
addresses.
l-5.
Manual
Addendums
1-G.
Improvements
or changes
to the
instrument
that
occur
after
printing
of
the
[manual
will
be explained
on an addendum
which
will
be attached
to
the
inside
back
cover.
1-7.
Safety
Symbols
and Terms
l-8.
The symbol
A
on the
instrument
denotes
that
the
user
should
refer
to
the
operating
instructions.
t
The symbol
on the
instrument
denotes
that
up to
5UllV may be present
on the
terminals.
The WARNING used
in
this
manual
explains
dangers
that
could
result
in personal
injury
or death.
The CAUTION used
in
this
manual
explains
hazards
that
could
damage the
instrument.
l-9.
Specifications
l-10.
Uetailed
specifications
for
the
Model
1920 are
given
in
Table
l-l.
l-l
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