DigitalFlow™ DF868 Multipurpose Ultrasonic Liquid Flowmeter Programming Manual (2-Channel)
61
Chapter 2. Displaying Data
2.5.3 Graphical Format
After choosing
PLOT
at the
FORMAT
prompt, the programming sequence continues as follows:
5.
Enter a maximum value for the
Y-axis
(vertical) scale that is larger than the maximum expected reading and
press
[ENT]
.
6.
At the
Y-Range
prompt, press
[F1]
to graph only positive Y values or press
[F2]
to graph both positive and
negative Y values.
After the
Y RANGE
is entered, the Model DF868 automatically displays the chosen log file records in the specified
graphical format.
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.
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 30.
V
E
L
ST: 08 MAR 09:50
<CUR
S
CURS
>
STAR
T
END
Table 30: 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
)
[
+ [F3]
=
YMAX
Display the programmed maximum Y value in the message line: (i.e.
YMAX 25.0 Ft/s
)
[
+ [F4]
=
T INC
Display the time increment value, as set when the log file was created, in the message line:
(i.e.
T INC 30 seconds
)
[
+ [F1]
=
EXIT
Leave the graphical
LOG
display and return the display to the previous data format. (The
[EXIT]
key on the keypad will also perform this function.)