17 SuperUser mode
17.4 Limit of the signal amplification
FLUXUS G801
2020-06-26, UMFLUXUS_G801V1-0EN
148
17.4
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 amplification. If the signal amplification is above the max. signal amplification,
• the measured value 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, an interrogation point (
?
) is
displayed).
• Select the menu item
Miscellaneous
.
• Press ENTER until the menu item
Gain threshold
is displayed.
• Enter the max. signal amplification for each measuring channel. Enter zero to measure without signal amplification limit.
• Press ENTER.
The current value of the amplification (
GAIN
) can be displayed in the upper line in the program branch
Measuring
. If the
current signal amplification value exceeds the max. amplification, it is followed by
→FAIL!
.
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 not be stored until a measurement is started. If the transmitter is switched off without starting
a measurement, the entered correction data will be lost.
Notice!
The correction of the flow velocity remains activated after the deactivation of the SuperUser mode.
Special Funct.\SYSTEM settings\Measuring\Miscellaneous\Gain threshold
Special Funct.\SYSTEM settings\Measuring\Miscellaneous\Gain threshold\Fail if > 90 dB
Notice!
The limit of the signal amplification remains activated after the deactivation of the SuperUser mode.
