6.1 Connect power supply
The OTT CBS requires a power supply of 10 … 30 V DC, typ. 12/24 V DC (e.g.
using batteries or mains connection with galvanically separated low safety voltage).
Please note the following points when dimensioning the power supply:
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Maximum power consumption per day: 3700 mAh (typ. 320 mAh/day) (with
1 min measurement interval and 100 m measuring tube using the 4 … 20 mA
interface)
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Peak current consumption: temporary max. 2 A
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Protect the supply voltage with a microfuse (e.g. 2.5 A, slow-blow)!
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When using solar panels, we recommend the use of an overvoltage protection
device.
To supply the OTT CBS with power, proceed as follows:
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Connect the power supply to screw terminal strip A of the OTT CBS as shown
in Fig. 8.
Notes
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The OTT CBS does not have a switch for switching the unit on and off. As soon
as power is supplied, the OTT CBS is ready for operation.
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Each time the power supply is attached, the piston pump operates for approx.
400 strokes (approx. 5 minutes running time).
6.2 Connecting the OTT CBS to any datalogger using an SDI-12
interface
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Connect the OTT CBS to an SDI-12 input of the external datalogger. Follow the
datalogger handbook as you do this. See Fig. 8 for the assignments.
6.3 Connecting the OTT CBS to any datalogger using 4 … 20 mA
interface
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Connect the OTT CBS to a 4 … 20 mA input of the external datalogger. Follow
the datalogger handbook as you do this as well as Chapter 10 of these instruc-
tions). See Fig. 8 for the assignments.
䡵
With depth measurement: ensure that DIP switch 4 is set to ON.
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