Xylem SonTek FlowTracker2, User Manual

Page: 106 / 308

SonTek – a Xylem brand
FlowTracker2 User’s Manual (January 2019)
105
Quality Control Criteria QC Warning Graphic Display
Peak Level
•
The shape of the sampling
volume curve is compared to
the expected shape. Any
significant deviation causes a
warning,
•
This criterion can only be
checked with sufficient SNR
(> 7 dB).
Peak Level >
QC
Peak Location
•
The physical location of the
sampling volume is compared
to the expected location. Any
significant deviation causes a
warning.
•
This criterion can only be
checked for sufficient SNR (>
7 dB).
Peak
Location >
QC
Temperature
•
No criteria defined for
Temperature.
•
Temperature data included in
Automated BeamCheck to
allow user to analyze data
before measurement.
None
c) The graphical display of the Quality Control parameters supplied during the
Automated BeamCheck is time series of each parameter. If there are any
significant variation between the beams, spikes are present in the data or Quality
Control warnings are issued we recommend the following steps,
i). Repeat the test at least once, after you verify that the probe and sampling
volume are well away from any underwater obstacles.
ii). Perform BeamCheck, described in 6.3 Beam Check to evaluate FlowTracker2
performance in more detail,
d) The display options for individual or all beam check data are listed in
Table 6:7
.
The shortcut key on the keypad determines which beam SNR will be displayed,
Table 6-7 - Automated Beam Check Display
Beam Line Color Keypad Key
Beam1 Red 1
Beam2 Blue 2
Beam3 Green 3
All Beams All 4
e) To select a Quality Control Criteria,
i). Use up or down scroll arrows keys to view quality control criteria.