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Prosonic T - FMU 130, 131, 230, 231, 232
Endress+Hauser
Temperature
The actual temperature at the sensor is shown in V3H5.
Upper Temperature Limit
Exceeding the upper temperature limit of 176°F (80°C) is shown in Field V3H5. Any value
above 176°F (80°C) is then stored in this field.
Lost Echo Delay Time
Entering a delay time in V8H3 prevents an alarm response of the measuring point to a
short-term lost echo (e.g. caused by foam). For normal level applications, the delay time
should not be smaller than 30 s.
Factory setting: 60 s
Selectable: 0 to 255 s
Actual Height
Falsifications in height in V0H9 (e.g. by temperature effects) can be corrected by entering
the correct height – the actual height – in V3H1. Entering the actual height then automatically
corrects empty calibration.
First Echo Factor
Vessels with tightly rounded roofs (dome covers) can cause double echoes giving rise
to a display showing a level which is too low. Double echoes can be excluded by
increasing the first echo factor to “maximum”.
# VH Entry Text
1 V8H3 e.g. 80 H
The measuring point reacts to a lost echo only after 80 s and then activates the alarm
E 641.
# VH Entry Text
1 V3H4 2 H Maximum first echo factor
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