Endress+Hauser Prosonic M FMU40 Brief Operating Instructions page 11

Prosonic M FOUNDATION Fieldbus
2.4.2 Safety distance
If the level rises to the safety distance SD, the device switches to warning or alarm status.
The size of SD can be set freely in the "Safety distance" (015) function.The "in safety
distance" (016) function defines how the device reacts if the level enters the safety distance.
There are three options:
• Warning: The device outputs an error message but continues measurement.
• Alarm: The device outputs an error message. The output signal assumes the value defined in
the "Output on alarm" (011) function (MAX, MIN, user-specific value or holds the last
value). As soon as the level drops below the safety distance, the device recommences
measurement.
• Self holding: The device reacts in the same way as for an alarm. However, the alarm
condition continues after the level drops below the safety distance. The device only
recommences measurement when you cancel the alarm using the "Ackn. alarm" (017)
function.
2.4.3 Range
The sensor range is dependent on the measuring conditions. Refer to Technical Information TI
365F/00/EN for an estimation. The maximum range is shown in the above diagram (valid for
good conditions).
Sensor
FMU40
FMU41
FMU42
FMU43
FMU44
Endress+Hauser
maximum range [mm (inch)]
5 (16)
8 (26)
10 (33)
15 (49)
20 (66)
Mounting
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