18 SuperUser mode
18.4 Limit of the signal amplification
FLUXUS F60*
2017-10-16, UMFLUXUSF60xV5-0EN
178
18.4
Limit of the signal amplification
In order to prevent disturbing and/or pipe wall signals (e.g., if the pipe has run empty)
from being interpreted as useful signals, it is possible to define a max. signal amplifica-
tion. If the signal amplification is greater than the max. signal amplification,
• the flow velocity will be marked as invalid. The physical quantity cannot be determined.
• a hash symbol (
#
) will be displayed after the unit of measurement (in case of a normal
error, (
?
) is displayed).
• Select
Special Funct.\SYSTEM settings\Measuring\Miscellaneous
.
• Press ENTER until the menu item
Gain threshold
is displayed.
Example
Slope
: 1.1
Offset
: -10.0 cm/s = -0.1 m/s
If a flow velocity v = 5 m/s is measured, before the calculation of the derived quantities,
it will be corrected as follows:
v
cor
= 1.1 · 5 m/s - 0.1 m/s = 5.4 m/s
Example
Slope
: -1.0
Offset
: 0.0
Only the sign of the measured values changes.
Notice!
The correction data will only be stored when a measurement is started. If the trans-
mitter is switched off without starting a measurement, the entered correction data
will be lost.
Notice!
The correction of the flow velocity is still active after the deactivation of the SuperUser
mode.
Special Funct.\SYSTEM settings\Measuring\Miscellaneous\Gain
threshold