OTT CBS, Operating Instructions Manual, Page: 20 / 28

8.2 Setting measurement type of the 4 … 20 mA interface to
level or depth measurement
8.3 Scaling the measuring range for the 4 … 20 mA interface
With DIPs 5 and 6 you can scale the available measuring range (15 or 30 m) of
an OTT CBS to a smaller range. Where the whole measuring range is not required,
this has the advantage that a higher resolution for the 4 … 20 mA interface can
be achieved. Example: For 2 m water level change 16 mA measuring range is
available (DIP switches 5 + 6 = OFF).
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
15 m / 50 f t
1.5 bar / 25 psi
( n ot scaled)
30 m / 100 f t
3 bar / 50 psi
( n ot scaled)
8 m / 25 f t
0.8 bar / 12 psi
15 m / 50 f t
1.5 bar / 25 psi
4 m / 12 f t
0.4 bar / 6 psi
8 m / 25 f t
0.8 bar / 12 psi
2 m / 6 f t
0.2 bar / 3 psi
4 m / 12 f t
1.5 bar / 6 psi
Standard +
USGS specification
30 m measuring
range
CBS version
Fig. 17: Scaling the measuring
range of the OTT CBS
(4 … 20 mA interface).
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
Level M easure m e n t
Depth M easure m e n t
Fig. 16: Setting measurement type level or
depth measurement of the OTT CBS
(4 … 20 mA interface).
20