PRINTER OUTPUT
The M35P was designed for use with the built-in printer. The printer is the
only means
of
displaying the velocity measured
in
the proof channel, and
it
is
convenient not to write down numbers after each shot. Chronographs with
printers are nothing new
to
Oehler; we've been making them for industrial
users for over forty years. We have maintained one absolute requirement;
the printed record must always reflect a complete record
of
the test. Editing
removes individual shots from the next statistical summary, but the data
remains
in
the record. The scientist crosses out data in his records; he
doesn't erase it. The printed output from the M35 saves all the velocities.
You will have the data later
if
you need it. Just because you don't expect a
particular velocity doesn't mean it is wrong.
Shown below is a typical output tape from the printer:
3272-01-3272
3234-02-3235
3256-03-3256
3259-04-3257
3302-05-3259
*
X
3234-06-3236
Page
10
05-3272
+
05-3235
-
05-0037
T
05-3251
M
05-0015
$
~
ProojVelocity.
Shot Number.
Primary Velocity
f-
Asterisk denotes possible error
~
Preceding shot omitted from summary
~
Highest Velocity
+-
Lowest Velocity
~
Extreme Velocity Spread
+---
Mean
or
Average Velocity
+---
Standard Deviation
SUMMARY
After you have fired a test lot
of
ammo (up to 20 rounds in the edit mode
or
255 rounds with the edit off), the M35 will summarize the test. With the
printer in use, one push
of
the SUMMARY button causes the entire summary
to print.
The
printed summary shows the high velocity (+) the low velocity (-
), the extreme velocity spread
(T)
, the mean or average velocity
(M),
and the
standard deviation
($). The printed round number in the summary refers to
the number
of
valid rounds considered
in
the summary. The summary ends
with a display
of
---- showing that more rounds can
be
fired and added to the
data for a later summary.
If
the printer is not in use, pushing the SUMMARY button briefly displays
Sh
ot
and then the number
of
rounds considered in the summary. The next
push
of
the SUMMARY button gives m and the high velocity,
...
LO
and
the low velocity,
...
ES and the extreme velocity spread,
...
A and the
average velocity, . . .
Sd and the standard deviation, and fmaUy
----
is
displayed showing that another round may be fued.
If
you fire large lots
of
ammo (more than 10 rounds), it is prudent to stop and
record the summary at intervals during the test.
If
the test is interrupted, you
will at least have partial statistics.
Only the primary velocities are summarized. The accuracy
of
the primary
channel is normally twice that
of
the proof channel, and the summary
of
the
primary velocities is most
signillcant.
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11
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