Thermo Scientific HB-S200, User Manual

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Sarasota 200 Ultrasonic Multipath
Flowmeter
Appendix 1 GAFA PC Software Page A1-21 Thermo Fisher Scientific
APPENDIX 1 GAFA PC SOFTWARE
To Observe Waveforms
•
The path number and type (i.e. velocity or depth) must be selected from the “Selection”
screen box.
•
To observe the transducer “fire” signal in detail, select a sample period of 1 ms and a
delay of 0 ms. Click on “Fire” and the fire signal will be displayed after approximately 10
seconds.
•
To observe the receive signal, (right), first
note the path TOF for the selected path.
This may be found on the “(View) Velocity
Paths” screen A1.3.2.
•
Set the Delay to slightly less than the TOF
and Sample Period to 1 ms.
•
Alternatively estimate the TOF as the path
length divided by the velocity of sound in
water (VOS).
•
To expand the waveform, the “zoom” facility
may be used. Double click on the waveform
in an area of interest.
•
2 vertical lines will appear which define the
viewing area to be zoomed in to.
•
Click and drag the viewing lines
•
Double click in the area between the
viewing lines to zoom in.
•
It may be necessary to enter a longer Delay time in conjunction with zoom to avoid losing
display resolution.
•
If the viewing conditions are set up on the Down Stream waveform, click on the “Up
Stream” box to replicate the conditions.
•
The blue vertical lines show the time that the signal has been received and accepted.
•
If there is no blue line the signal has not been accepted.
•
“Reset Waves” reverts to the initial view with no zoom.
•
“Fire” gets another sample
•
“Auto Fire” gets a new sample every 5 seconds.
•
“Drive” and “Gain may be altered from this screen rather than returning to the Channel
Config screen A1.4.2.2. It is best to set the operation to manual and to turn off shape
recognition via the Config screen beforehand. Set to Auto again via A1.4.2.2 if required
once finished with waveform viewing.
•
Ultrasonic Level waveforms are displayed in a similar fashion but only 1 waveform is
displayed for each level transducer.