KROHNE LEM 300 EN - Manual (Page 9)

Installation and Operating Instructions LEM 300 9
4.4 Example 4
Tank 1 is being filled with water and emptied via a water tap. Security valve1 is securing the tank
from overflowing.
Tank 1: Metal
Ground: Via the LS 72XX process connection.
Instrument: LS 7240, 2 coated rods.
< Y1 level: Close valve1
> Y2 level: Open valve1
Tank 2 is filled via pump 2 and emptied via a water tap.
Tank 2: Metal
Ground: Via the LS 72XX process connection.
Instrument: LS 7240, 2 coated rods.
< Y3 level: Start Pump 2
> Y4 level: Stop Pump 2
1
Switches »Normally open«
2 230 V AC
3 Reversing relay 2
4 Pump 2
5 Tank 2
6 Valve 1
7 Tank 1
Z1 Y1 Y2 Y3 Y4 A1 A2 11 14 21 34
1
2
3
4
5
6
7