Xylem SonTek FlowTracker2, User Manual

Page: 290 / 308

SonTek – a Xylem brand
FlowTracker2 User’s Manual (January 2019)
289
Category Value Description
Logging Duration Per
File (min) Defines a file logging limit based on a time
duration.
Logging Interval Start /
End Time Alignment
The Logging Interval Start / End Time
Alignment works in combination with
“Logging Duration Per File (min)”.
If your logging duration per file is specified
as 10 min and you start your logging at
17:03:25:
- Without logging interval alignment
the next file will be started at
17:13:25, the third one at 17:23:25
and so on
- With logging interval alignment the
next file will be started at 17:20:00,
the third one at 17:30:00 and so on
Table 15-2: Velocity Range Settings
Velocity
Range
Absolute max
velocity
in arbitrary
direction
in ideal
conditions
Absolute max
velocity
in X direction
in ideal
conditions
Recommended
max velocity
in arbitrary
direction
in ideal
conditions
Recommended
max velocity
in X direction
in ideal
conditions
Auto ± 112 cm/s ± 448 cm/s ± 60 cm/s ± 200 cm/s
± 10 cm/s ± 10 cm/s ± 40 cm/s ± 3 cm/s ± 10 cm/s
± 20 cm/s ± 14 cm/s ± 52 cm/s ± 7 cm/s ± 20 cm/s
± 50 cm/s ± 27 cm/s ± 108 cm/s ± 15 cm/s ± 50 cm/s
± 100 cm/s ± 55 cm/s ± 220 cm/s ± 30 cm/s ± 100 cm/s
± 200 cm/s ± 112 cm/s ± 448 cm/s ± 60 cm/s ± 200 cm/s
Ideal conditions consist of:
-
ideal signal conditions (high SNR, low noise)
-
Ideal boundary conditions (no boundaries nearby)
-
Ideal temperature and sound speed (18°C and 1475 m/s)
-
For X direction velocity – uniform flow in X direction
2D/3D FT2 probe would use the same recommendation with Z velocity maximum
same as the arbitrary direction.