HP 3468A - Page 59

The
STATS
program
computes
four
statistical
values
for
a
set
of
measurements
made
by
the
3468A.
The
four
values;
Mean,
Standard
Deviation,
Minimum
value,
and
Maximum
value,
are
displayed
on
the
3468A’s
display
for
easy
readability.
An
example
of
where
this
program
might
be
used
is in
Component
Test.
You
have,
for
example,
a
batch
of
one
hundred
1,000
ohm
5%
resistors.
Your
job
is
to
test
them
to
be
sure
that
they
are
within
specification
and
to
check
for
trends
such
as
the
mean
value
increasing
between
batches.
Running The Program
The
program
does
not
have
provisions
for
setting
the
3468A
to
your
desired
measurement
function,
range,
etc.
You
must
either
do
this
manually
from
the
3468A
front
panel,
or
modify
line
O03
to
specify
the
function,
range,
etc.
Remember
that the T2 command
must be the last command
in the string.
STAT
When the 3468A displays - S. TRIG - SRQ - connect your first device to be
sampled (first resistor, voltage, etc.) to the 3468A and press the multimeters
single trigger key.
The
3468A
will
take
one
measurement,
display
the
reading,
and
send
the
result
to
the calculator
for storage and future analysis. The multimeter
will return with the
same display - S. TRIG -SRQ.
Remove the first device from the 3468A and connect the second device. Again,
press the 3468A single trigger key.
Continue in this manner until all devices have been tested. At that time, press the
3468A SRO key (instead of the single trigger key) to begin the analysis of the
measurements. First, the 3468A will display the number of samples or devices
tested:
N= XXxX.0000
Press the 3468A’s SRO key. The 3468A will momentarily display the word
“MEAN” and then display the calculated mean value.
MEAN
XXXXXXXK
Press
SRO
again.
The
next
value
displayed
is
the
standard
deviation.
STANDARD
DEV.
XXXXXXX
Press
the
SRO
key
again
to
display
the
minimum
value
measured.
MINIMUM
XXXXXXX
54