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2fX
MICROLOGGER OVERVIEW'
Explanation
Enter
*5 mode. Clock running but not set correctly.
Advance to YEAR location.
Key
in
current
year (1990).
Enter and advance to day
of
year.
Key in day of
year.
The
21X Prompt Sheet has
a
day
of
year calendar.
Enter and advance
to hour and minute.
Key in hrs:min (1:24 PM
in
this example).
Clock set
and running. (:HR:MlN:SEC)
Now
that the ctock
is
set,
we will erase Final Storage so that
any data from the first example will not
be
confused with
this
data. The
*A
Mode is used to repartition memory
between lnput, lntermediate,
and
Finatstqrage. Final
Storage
is erased when memory is repartitioned, even if the same sizes
are retained (Section
1.5).
Display Shows
Key
(lD:Data)
Explanation
Key
"5
A
90
A
Display Shows
(lD:Data)
00:21:32
05:89
05:90
05:0076
05:197
05:00:21
05:1324
;13;24:01
197
A
1324
A
and
commence logging data.
*A
01:0028
28
01:28
A
02:0064
'0
:LOG
1
The
21X is rtow programmed to measure the
panel and
Tp
temperatures every 5 seconds.
Every hour tfrere
will be
3
values
output:
1)
the
output
array lD, 103 (3rd instruction
in
Table
1
set the
Outpi.tt
Flag),
2)
time, and 3) average of
the
thermocfuple
readings that
occurred
in
the
previous hoqr.
Every day there will be
7
values
output:
1)
output
array lD, 106 (6th instruction
in
Table
1
set
the Output Flag), 2) day,
3)
time,
4)
maximum TC
temperature that occurred
in
the
previous day, 5) time at which
the maximum
occurred,
6) minimum TC temperature, and
7)
the time at
Which
the minimum occurred.
There are
28Input Storage
locations.
"Change" to
28 locations
Enter 28, display no.
of Intermediate
loc.
Exit *A,
enter'0,
compile
Table
1
OVs.
DATA RETRIEVAL OPTIONS
There are several options for data storage and
retrieval. These options are covered in detail
in
Sections
2,4,
and
5.
Figure
OV5-1
summarizes the
various possible methods.
Regardless
of
the method used, there are three
general approaches
to
retrieving data
from
a
datalogger.
1.
On-line output
of Final Storage data to
a
peripheral storage
device.
On
a regular
schedule, that storage
device is brought
back to
the office/lab where the data
is
transferred to
the
computer. Another
storage device is usually
taken
into
the field
ov-l5
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