P M A C
3 0 0 0
Page
16
Analog
Output
The
Analog
Output
is
available
to
the
user
via
the
BNC
connector
on
the
rear
of
the
PMAC
3000.
See
Figure
1.
The
center
conductor
is
the
analog
signal,
and
the
outer
shell
is
the
analog
common.
The
analog
output
is
tied,
via
software,
directly
to
the
sensor
input.
It
is
a
scaled
reflection
of
the
live
load
on
the
sensor
as
a
percentage
of
the
sensor
full
scale
capacity.
The
output
range
of
the
Analog
Output
is
user
selectable
in
the
Menu
to
one
of
four
ranges.
The
ranges
are,
+/
‐
10V,
+/
‐
5V,
0
‐
10V
and
0
‐
5V.
See
Figure
13.
In
any
case,
these
user
selectable
ranged
reflect
the
output
value
of
the
Analog
Output
when
full
scale
load
is
applied
to
the
sensor.
The
entire
range
of
the
sensor,
from
positive
full
scale,
to
negative
full
scale,
is
accounted
for.
This
means
that
zero
load
on
the
sensor
will
produce
0V
output
for
+/
‐
10V
and
+/
‐
5V
ranges,
5V
for
the
0
‐
10V
range,
and
2.5V
for
the
0
‐
5V
range.
The
analog
output
uses
the
full
16
bits
of
the
digital
to
analog
converter
(DAC)
resolution
to
produce
the
+/
‐
10V
output.
The
+/
‐
5V
and
0
‐
10V
ranges
are
produced
using
15
bits
of
DAC
resolution.
The
0
‐
5V
range
is
produced
using
14
bits
of
DAC
resolution.
Figure
13
–
Analog
Output
Settings
Screen
The
Analog
Output
may
be
turned
off
by
choosing
the
Disabled
selection
on
the
Analog
Output
Settings
screen.
Turning
off
the
Analog
Output
when
not
needed
will
increase
battery
life
by
about
10%.
The
Analog
Output
is
electrically
isolated
from
the
PMAC
3000.
When
measuring
this
output
with
a
data
acquisition
system,
it
may
be
necessary
to
connect
the
signal
common
to
a
ground
reference
on
the
data
acquisition
system
to
insure
that
the
common
mode
input
range
of
the
data
acquisition
system
is
not
violated.
