Endress+Hauser Levelflex FMP57 - Page 140

Operating menu Levelflex FMP56, FMP57 FOUNDATION Fieldbus
140 Endress+Hauser
Signal quality
Navigation  Setup → Signal quality
Description Displays the signal quality of the evaluated echo.
Additional information Meaning of the display options
• Strong
The evaluated echo exceeds the threshold by at least 10 mV.
• Medium
The evaluated echo exceeds the threshold by at least 5 mV.
• Weak
The evaluated echo exceeds the threshold by less than 5 mV.
• No signal
The device does not find a usable echo.
The signal quality indicated in this parameter always refers to the currently evaluated
echo: either the level/interface echo
4)
or the end-of-probe echo. To differentiate between
these two, the quality of the end-of-probe echo is always displayed in brackets.
In case of a lost echo (Signal quality = No signal) the device generates the following
error message:
• F941, for Output echo lost (→  163) = Alarm.
• S941, if another option has been selected in Output echo lost (→  163).
Confirm distance 
Navigation  Setup → Confirm distance
Description Specify, whether the measured distance matches the real distance.
Depending on the selection the device automatically sets the range of mapping.
Selection • Manual map
• Distance ok
• Distance unknown
• Distance too small
*
• Distance too big
*
• Tank empty
• Delete map
Factory setting Distance unknown
4) Of these two echos the one with the lower quality is indicated.
* Visibility depends on order options or device settings