18 SuperUser mode
18.5 Upper limit of the sound speed
FLUXUS F60*
2017-10-16, UMFLUXUSF60xV5-0EN
180
• Enter for each measuring channel the offset. Enter zero to use the default value of
300 m/s.
• Press ENTER.
It is possible to display the valid range for the sound speed (
SS=
) in the lower line within
the program branch
Measuring
during the measurement. The second value (here:
2146 m/s) corresponds to the upper limit at the operating point.
Special Funct.\SYSTEM settings\Measuring\Miscellaneous\Bad
soundspeed\offset
Example
fixed upper value of the sound speed
thresh.
: 2007 m/s
offset
: 600 m/s
value of the sound speed curve at the operating point: 1546 m/s
As 1546 m/s + 600 m/s = 2146 m/s is greater than the fixed upper value 2007, this val-
ue will be used as the upper limit of the sound speed when the plausibility of the signal
is evaluated.
Fig. 18.1:
Display of the valid sound speed range
Notice!
The defined upper limit of the sound speed remains active after the deactivation of
the SuperUser mode.
GAIN=91dB
SS=1038/2146 m/s