8
Basic Settings
– continued –
Establishing active measuring range
– continued –
Ascertain the type of fluid to be monitored. Establish the active measuring range [mm] for your
application. Use diagrams
h
,
i
or
j
to determine the required code switch settings for water and
fuel oil EL.
Example: Max. measuring range at 25 °C: 500 mm, active measuring range: 000 mm,
switch 3 of the code switch must be set to ON and all other switches to OFF.
If the fluid to be monitored is not water or fuel oil EL, the voltage must be measured in order to
determine the switch position. For this purpose switch on the mains switch of the associated level
switch NRR 2..., NRS 2... or NRT 2... .
. Open the cover
6
of the terminal box
!
.
2. Fill vessel until its max. liquid level is reached and then connect a voltmeter between the terminals
“” (+) and “M” (–). Before starting the measurement set all switches of the code switch to OFF.
3. Now operate each individual switch in turn: first only to ON, then only 2 to ON, then only 3 to ON,
then only 4 to ON, then 4 +5 to ON and then 4 + 5 + 6 to ON. As soon as with one of the switch
positions the value measured by the voltmeter exceeds 7 V, select the preceding switch position.
4. After having set the code switch, put cover
6
onto the terminal box
!
and fix it by fastening the
screw
5
.
2 ON
3 ON
4 ON
7
6
5
4
3
2
1
0
200
400
600
800
1000
1200
1400
1600
1800
2000
0
4+5 ON
Code switch
Example
A
A
A
A
B
B
B
B
Active measuring range (control range) [mm]
Output volta
ge U
M
[V
] DC
A
= completely submerged
B
= completely exposed
Fig. 12
h
Diagram for water, conductivity ≥ 20 μS/cm
