Panametrics DigitalFlow GC868, Руководство по программированию, Страница: 52 / 134

Chapter 2. Displaying Data
2-7 DigitalFlow™ GC868 Programming Manual (2-Channel)
At any given time, the 120 records stored in one page of the log file will be graphed
on the display screen. The cursor , which is shown as a vertical line that extends the
full height of the graph window, can be used to highlight any one of these records.
IMPORTANT: Only the first of the three logged parameters is displayed in the
graphical format of the LOG submenu. Therefore, when creating a log
file, be sure to specify the parameter to be graphed at the 1st Value
Logged prompt. See Chapter 3, Logging Data, for details on creating a
log file.
In the typical graphical display shown, the first logged parameter (VEL) is shown to
the left of the y-axis and there is a
message line
below the graph that initially
indicates the starting date and time of the current page. Notice that most of the
locator bar has been replaced by a
status line
in standard video that shows the
value, units and time of the record at the current cursor location. However, there is
still an inverse video
pointer
at the far right of this line to indicate that additional
option bar choices are available.
Note: The date in the message line includes only the day and the month (not the
year), and the times in the status line and the message line include only the
hours and minutes (not the seconds).
Because the times displayed in the LOG graph are in whole minutes only, movement
of the cursor may not result in a visible change in the posted times. For example, if a
TIME INCREMENT of 30 seconds has been programmed, two presses of either cursor
movement key will be required to change the displayed time by one minute.
1.23 Ft/s 10:16
Use the [
←
] , [
→
] and [F1]-[F4]
keys to select the desired
option. The options are listed in
Table 2-4 on page 2-7.
V
E
L
ST: 08 MAR 09:50
<CURS CURS> START END
Table 2-4: Graphical Log Display Options
Option Bar Choice Description
[F1] = <CURS Move the cursor one record to the left and
display the value and time of that record in
the status line:
(i.e. 6.85 Ft/s 10:38 )
[F2] = CURS> Move the cursor one record to the right and
display the value and time of that record in
the status line:
(i.e. 5.31 Ft/s 10:38 )
[F3] = <PAGE Display the previous page of records
[F4] = PAGE> Display the next page of records
[
→
] + [F1] = START
Move the cursor to the first record on the
current page and post the date and time of
that record in the message line:
(i.e. ST: 08 MAR 10:38 )
[
→
] + [F2] = END
Move the cursor to the last record on the
current page and post the date and time of
that record in the message line:
(i.e. END 08 MAR 11:14 )