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FUNCTION
Keys
When
changing from one
function
to
another
the
output
is
automatically
set to
OFF.
When
changing from
Q,
to
AC
or
DC,
the
OUTPUT
value
is
automatically
set to
zero.
If
the corre-
sponding
OUTPUT RANGE
or
value
is
not
available
on
the
new
function, the
4708
displays Error
8
and sounds
its
error
buzzer.
Q. selection
forces the
4708
into
Remote
Sense
for
4-wire
operation.
Selected
Specified
Function
Output
DC
AC
Q.
DC
Voltage
c
o
^
1
.
1
or Error
9
and
AC
Voltage
|
,
..
1
buzzer
if
any
Resistance
>
DC
and
I
DC
Current
1
of
the
Options
AC
and
I
AC
Current
^
are
not
fitted
OUTPUT RANGE
Keys
Each
OUTPUT RANGE
key
scales the
output
as selected
by
the
user, setting the
legend
and
decimal
point
on
the
OUTPUT
display
to
match.
Full
range
values
for
voltage
and
current are
marked above
the keys.
Nominal
values of
each
precision
resistor for
the
O
function are
marked below
the keys.
Voltage
and
current
ranges
are selectable as follows, the actual
output value being
selected
by
use of
the
OUTPUT
display t
keys.
DC
Voltage
AC
Voltage
DC
Current
AC
Current
Resistance
lOOjiV
to
lOOOV
ImV
to
lOOOV
RMS
100|iA
to
1
A
lOOfxA
to
1
A RMS
lOO
to
lOOMO
If
OUTPUT
is
ON
when
changing
ranges,
it
remains
on
unless
the
change
is
to
lOOOV
range, or
ranging
up
to
more
than
75V
RMS
in
AC
or
llOV
in
DC
on
lOOV
range.
In these
cases
OUTPUT
defaults
to
OFF.
Any
range
selection
which would
exceed
the internally
defined voltage-frequency
limit
is
auto-
matically
inhibited.
These
limits
are
described
on page
3-7.
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