Measurements - Campbell 21X Operator's Manual

Micrologger
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SECTION 11.
OUTPUT PROCESSING INSTRUCTIONS
(defined as
the bin select value)
is
within
a
particular subrange
of
the
total specified range.
The
count
in
the bin associated with each
subrange is incremented whenever the value
falls within that
subrange. The value which
is
output
to Final Storage for each bin
is
computed
by dividing the accumulated
total
in
each bin by
the
total number of
scans:
This
form of output
is
also referred to as
a
frequency distribution.
The weighted
value histogram uses data lrom
2
input
locations. One location contains the bin
select value;
the other contains the weighted
value.
Each time
the instruction
is
executed,
the
weighted
value
is
added to
a
bin. The
sub-
range that
the bin select value is in determines
the bin to which the weighted value
is
added.
When
the Output Flag
is
set, the value
accumulated
in
each bin
is
divided by the
TOTAL number of input scans to obtain the
values that are output
to Final Storage. These
values are the contributions
of
the sub-ranges to
the
overallweighted
value.
To obtain the
average
of
the weighted values that occurred
while
the bin select value was within a pafiicular
sub-range, the value output
to
Final Storage
must be divided by the fraction
of
time that
the
bin select value was within
that particular sub-
range (i.e.,
a
standard histogram
of
the bin
select value must also
be
output).
For
either histogram, the user must
specify:
1)
the number of repetitions, 2) the number of
bins,
3)
a
form
code specifying whether a
closed or open
form histogram
is
desired (see
below),
4)
the bin select value input location,
5)
the weighted
value input location (see below),
6)
the lower range
limit,
7)
the upper range
limit.
The standard histogram (frequency distribution)
is
specified by entering
"O"
in
the weighted value
input location parameter. Otherwise, this
parameter specifies
the input location
of
the
weighted
value. With
more
than one repetition
the bin select
value location will be incremented
each repetition and the weighted value location
will remain the same (same weighted value
sorted on
the basis of different bin select
values).
The weighted
value location will
be
incremented if it
is
entered as
an indexed
location (key "C" at some point
while keying
in
Parameter
5;
two dashes,
--,
willappear
on
the
right
of
the display).
At
the user's option, the histogram may
be
closed or
open.
The open
form includes
all
values below
the lower range limit
in
the first
bi
and
allvalues
above
the upper range limit
in
last
bin.
The closed
form excludes any values
falling outside of
the histogram range.
The difference between the closed and open
form
is
shown
in
the following example
for
temperature values:
Lower range limit
Upper range limit
Number of bins
100c
300c
10
Closed
Form
Open Form
<120
>2go
Range
of
first
bin
10
to
1
1.99o
Range
of last
bin
28 to
29.990
4
4
01:
02:
03:
o4:
05:
06:
07:
A
common use of
a
closed form weighted value
histogram
is
the wind
speed
rose. Wind
speed
values
(the
weighted value input) are
accu
mulated into corresponding direction
sectors (bin select input).
PAR. DATA
NO. TYPE
DESCRIPTION
2
Repetitions
4
Number
of bins
2
Form
code
(O=open
form,
1=closed form)
Bin select
value input location
no.
Weighted
value input location
no.
(0 =
frequency distribution option)
FP
Lower limit
of range
FP
Upper limit
of range
Outputs
generated:
number of bins
*
repetitions
*** 77
RECORD REAL
TIME
***
FUNCTION
This instruction stores the current time in
Final
Storage. At
midnight the
clock rolls over from
23:59 to
00:00.
The day also changes.
lf hourly or daily summary data
is
output, it may
be desirable
to have the previous day specified
with the output, since
that
is
when the
measurements
were
made.
Entering a
2
for
th
day code causes
the previous day to be output
11-4

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