15
Basic settings
Establishing active measuring range (control range)
Ascertain the type of fluid that will be measured. Determine the active measuring range (control range)
in mm. Refer to diagrams
u
,
v
or
v
for the required code switch settings for water and fuel oil EL.
Example: Max. measuring range at 25°C: 1500 mm, selected active measuring range: 1000 mm, toggle
switch 3 of the code switch must be set to ON, all other toggle switches to OFF.
If a fluid other than water or fuel oil EL is to be measured, the position of the code switches must be
determined by measuring the voltage. For this purpose apply supply voltage to the connected level
switch / level controller.
1. Unscrew screw
i
land remove cover
j
.
2. Fill vessel to required maximum level and connect a voltmeter between terminals "1" (+) and "M"
(–). Before starting the measurement set all toggle switches of the code switch to OFF.
3. Now operate each individual switch in turn: only switch 1 to ON, only 2 to ON, only 3 to ON, only 4
to ON, only 4 + 5 to ON and only 4 + 5 + 6 to ON. As soon as with one of the switch positions the
value measured by the voltmeter exceeds 7 V, stop operating switches, and select the preceding
switch position.
4. After having set the code switch, place cover
j
onto the terminal box
o
and fasten with screw
i
.
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
Selected (active) measuring range [mm]
Output volta
ge U
M
[V] DC
A
= completely submerged
B
= completely exposed
Fig. 13
u
Diagram for water, conductivity ≥ 20 μS/cm
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