7088-8000
-172
F.5 Viewing the Flow Data in the Graph Tab
After the flowmeter has been configured (Section F.4), the values for signal strength,
velocity, flow rate, and totalized flow can be observed in the
GRAPH
tab (Figures F-21
through F-23). In addition to numerical flow data, a graphical representation of a signal
sample is displayed for analysis.
The yellow waveform on the graph represents the signal from the upstream transducer,
while the green waveform represents the signal from the downstream transducer. The Y
(vertical) axis of the graph represents signal amplitude and the X (horizontal) axis
represents time in microseconds. The signal from the upstream (
UP
) and downstream
(
DOWN
) transducers can be displayed separately or simultaneously by clicking on the
appropriate check boxes located in the upper left corner of the graph.
The differential transit time of the upstream and downstream signals is represented by the
horizontal distance between the peaks of the two waveforms. The greater the horizontal
offset, the higher the flow rate.
To view a sample of the signal in different time resolutions, the graph can be scaled with
one of several time divisions along the X axis. The following time divisions selections are
displayed beneath the graph:
!
0.1
Τs
/div
(0.1 microseconds per division)
!
0.5
Τs
/div
(0.5 microseconds per division)
!
1.0
Τs
/div
(1.0 microseconds per division)
!
2.5
Τs
/div
(2.5 microseconds per division)
!
5.0
Τs
/div
(5.0 microseconds per division)
The horizontal scroll bar located at the bottom of the graph may be used to view the
portions of the sample which are not currently displayed. Figures F-21 through F-23
illustrate examples of the same signal as it would be displayed on the graph with three
different time divisions (0.5, 1.0, and 5.0 microseconds per division).
To Next Page
Loading...
Need help?
General