Please note:
All connection cables must be UV-resistant and suitable to be laid
in the ground!
Connection cable for data collection device/precipitation gauge
SDI-12 interface – Cable length: maximum 70 m
1)
– Cable type: shielded low-voltage cable
– Wire size: 3 x 0.5 mm
2 2)
RS-485 interface – Cable length: maximum 1000 m
– Cable type: twisted-pair cable
3)
;
shielded design
– Wire size: 2 x 2 x 0.5 mm
2
Pulse output – Cable length: maximum 1000 m
– Cable type: shielded low-voltage cable
– Wire size: 6 x 0.5 mm
2
The connection cable recommended in each case includes the wires for power
supply and data collection device.
1)
with a point-to-point connection (no SDI-12 bus operation), a cable length of up to 300 m is possible.
2)
with standard SDI-12 wiring, alternative 4 x 0.5 mm
2
wire with separate power supply.
3)
the wires intended for power supply can be twisted pair, but do not have to be.
Connection cable for orifice rim heater power supply
4)
– Cable length: maximum 125 m
– Cable type: unshielded low-voltage cable
– Wire size:
1 … 25 m: 2 x 0,5 mm
2
25 … 50 m: 2 x 1,0 mm
2
50 … 75 m: 2 x 1,5 mm
2
75 … 125 m: 2 x 2,5 mm
2
Calculation is based on: output voltage of the 24 V
DC
power supply (e.g. mains
adapter)
4)
optional: As necessary, alternatively provide two additional wires in the cable between data recording
unit and power supply considering adequate wire cross-section.
Grounding cable
– Cable length: max. 5 m
– Cable type: unshielded low-voltage cable
– Wire size: 1 x 10 mm
2
USB cable
If any changes are to be made to the factory settings, a USB cable is temporarily
required during commissioning (supplied). Maximum cable length: 3 m.
Please note:
The USB port has no overload protection. It is designed to be
temporarily used as a service interface.
5.2 Required tools and equipment
䊳
Open-ended wrench, size 13 mm (supplied)
䊳
Phillips screwdriver, size: PH 2
䊳
Slotted screwdriver, size: 0.8 mm x 4 mm and 1.0 mm x 6 mm
䊳
Tool for stripping insulation on electrical cables
䊳
Wire-cutting pliers
䊳
For a connection cable with wires made of strands: Ferrules and
crimping pliers
17
