Siemens 3UG4 - Page 372

Parameters
3UG4 / 3RR2 monitoring relays
372 Manual, 05/2016, NEB927043002000/RS-AC/004
Sensor sensitivity
The sensor sensitivity is the sensitivity R sens, with which the filling level monitoring relay
must respond.
The working principle of the filling level monitoring relays is based on resistance
measurement of conductive liquids (conductive measurement method). This method can be
used with all liquids and substances that have a resistivity < 200 kΩ.
Table B- 1 Resistivity of liquids
Product
kΩ
Product
kΩ
Buttermilk
1
Natural water
5
Fruit juice 1 Waste water treatment 5
Vegetable juice
1
Starch solution
5
Milk 1 Oil 10
Soup
2,2
Condensation
18
Beer
2,2
Soap foam
18
Coffee
2,2
Jellies
45
Ink
2,2
Gelatin
45
Salt water
2,2
Sugar solution
90
Wine
2,2
Whisky
220
Distilled water
450
Scaling factor
The "scaling factor" parameter allows the user to set the number of pulses per revolution
provided by the pulse encoder. This allows the revolutions per minute to be read direct on
the display.
Possible indications on the display:
Scale