YSI IFL 700 IQ - Manual (Page 21)

IFL 70x IQ Commissioning
3 - 11 ba76129e01 10/2012
Echo selection With this setting, the echo to be evaluated
is determined.
The echo is automatically identified
according to the criterion that was set.
Topmost echo The topmost echo (from the surface of the
water) is used for calculating the mea-
sured value.
To ensure that a weak echo can be iden-
tified among the surrounding echoes, the
interfering echoes can be suppressed
with the setting, Minimum intensity.
Strongest echo The echo with the greatest intensity is out-
put as the measured value.
With spongy sludge, the bottom echo is
the strongest echo of the echo profile.
To avoid taking the bottom echo as the
sludge echo, the Water depth and/or Eval-
uation range setting should be adjusted in
such a way that the bottom echo is not
taken into account.
Follow echo
On
Off Filter effecting that a new echo is only
evaluated if the new echo is in the vicinity
of the echo previously determined. The
tolerance range moves with each new
valid echo.
Minimum intensity 5 ... 30 ... 100 Filter that ignores echoes with low inten-
sity.
Evaluation range Filter that ignores measured values out-
side the selected range.
Complete The entire area between the end of the
dead zone and the bottom of the basin is
displayed.
Limited
Start
End Filter that reduces the measuring range to
the limits required. Thus, interfering
echoes of any fixtures installed in the
basin can be ignored.
Setting Selection/values Explanation