Station Location - Xylem SonTek FlowTracker2 User Manual

6.1.9

Station Location

The Max Spacing Change criterion (default 100%) is intended to avoid data entry
errors.
a) It is assumed that the spacing of adjacent stations will be nearly constant across
the river.
b) If spacing between stations has changed by more than Max Spacing Change,
Max
an alert is issued to be sure the location was not incorrectly entered. A 100%
Station
Max Spacing Change means the new station spacing is more than two times
Evaluate
the previous station spacing.
i). Determine if the station location trend is expected to be increasing or
decreasing by comparing the location of the first two stations. All stations are
expected to match this trend.
ii). Any time a station location is changed, the location is compared to adjacent
value(s) to see if the station is out of order.
• If the trend in location from the previous station to this station does not
• If the trend in location from this station to the next station does not match
• Collecting an out-of-order station is allowed. However, when an out-of-
iii). Any time a station location is changed, the location is compared to the starting
edge location. If the new location is outside the starting edge, a
Outside Edge
iv). Max Station Change is checked during station configuration (see
Warning
• User is notified of any stations that exceed the Max Station Change
• User is prompted to verify the location value or re-enter the location.
c) The expected station spacing is computed from the previous two station locations.
If the station spacing from the previous station to this location is more than Max
Spacing Change percent of the expected station spacing, then give the Stn
Spacing > QC warning. A warning will be triggered only if the station spacing is
too big (there is no warning that it is too small).
d) The station location check is re-run (only for Discharge mode) to ensure the
warnings are set with the most current data.
e) Max Spacing Change is active only in Discharge data collection mode.
f) This criterion can be adjusted or disabled under
FlowTracker2 User's Manual (January 2019)
match the expected trend, then give the Station Order warning.
the expected trend, then give the Station Order warning.
order station is entered we verify the location value since the station is
sorted into the correct place within the stream.
warning is given.
Messages).
criterion.
SonTek – a Xylem brand
Discharge
95
Location
Timing of
Settings.