Panametrics DigitalFlow GS868, Programming Manual, Page: 54 / 146

Chapter 2. Displaying Data
44 DigitalFlow™ GS868 Programming Manual (2-Channel)
2.5.3 Graphical Format (cont.)
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most of the locator bar has been replaced by a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.
2.6 Displaying the Transducer Signal
The SIGNL submenu permits the direct graphical display of several transducer signals. Specifically, the signals listed
in Table 17 below may be viewed in this format.
Note: The Measure type signals (Mup and Mdown) are only available if the S/M burst technique was selected in the
ACTIV menu.
Refer to Figure 15 on page 87 and complete the following steps to display the transducer signals. Press the
appropriate side of the [SCREEN] key to activate the desired pane of the display screen, then proceed as follows:
Note:
For this discussion, it is assumed that the left pane of the display screen is active. If the right pane is active, it
is only necessary to replace the
[F1]-[F4]
keys designations by the
[F5]-[F8]
keys.
1. To access the
Display Menu, press the
[DISP] key.
2. Press [
?
and [F1] = SIGNL .
3. Press [F1] to display the Skan type signals or press [F2] to display the Measure type signals.
Note: If the Skan burst technique was selected in the ACTIV menu, the Signal to Display prompt does not appear
and the Measure type signals are not available. To access these signals, the S/M burst technique must be
selected.
The signal graph is a plot of signal amplitude (y-axis) vs. time in microseconds (x-axis). When the SIGNL display
screen first appears, it may briefly remain blank. As soon as the signal is acquired, processed and loaded into the
display memory, the graph will appear. A cursor, which is displayed as a vertical line that extends the full height of the
graph window, is used to highlight any point in time along the x-axis.
Table 17: Available Transducer Signals
Transducer Signal Description
Skan Types
Sup upstream Skan signal
Sdown downstream Skan signal
Cup upstream Skan correlation
Cdown downstream Skan correlation
Measure Types
Mup upstream Measure signal
Mdown downstream Measure signal