16
Apply mains voltage to level switch NRS 1-7.
Commissioning
Check whether the NRG 16-11S and the associated controller NRS 1-7 are wired in accordance with
the wiring diagram.
Fig. 9, Fig. 10
Check wiring
Apply mains voltage
Electrical Connection
– continued –
Tools
■
Screwdriver for cross-recess head screws, size 1
■
Screwdriver for slotted screws, size 2.5, completely insulated according to DIN VDE 0680-1
■
Open-end spanner A. F. 18 (19)
Voltage table
Use this voltage table as a reference when checking whether the level electrode is submerged or if
there is a malfunction. Please take the wiring diagram of the electrode NRS 1-7 into account.
Fig. 9, Fig. 10
U
1-2
U
1-
⊥
U
2-
⊥
submerged
exposed
malfunction (submerged/alarm)
10 V
eff
0.5 µS/cm,
C = 0.13 cm
-1
2 V
eff
10 µS/cm,
C = 0.3 cm
-1
<
U
1-2
2
≥
U
1-2
2
≤
U
1-
⊥
Note
■
The self-checking routine of the amplifier NRS 1-7 reduces
U
1-2
every 40 seconds to
0 volt!
