ABB FV4000 Operating Instruction page 42

Electrical connections
5.2.4.1 Laying the signal cable (remote design only)
Remote design FV4000-VR4 Vortex and FS4000-SR4 Swirl flowmeters are based on the
FV4000-VT4 / FS4000-ST4 compact meters with all options. The transmitter is installed
separately from the flowmeter sensor, if this is positioned in a location which is difficult to
access. This design can also be advantageous if the measuring point is located in extreme
ambient conditions. The distance between the flowmeter sensor and the transmitter must not
exceed 10 m (33 ft). A special cable connects the flowmeter sensor to the transmitter. The cable
is permanently connected to the transmitter.
Fig. 31: Vortex / Swirl flowmeters
Important
Please observe the following when laying the signal cable:
• The signal cable carries a voltage signal of only a few millivolts and must, therefore, be
routed along the shortest distance possible. The maximum permissible signal cable length is
10 m (33 ft).
• All leads must be shielded and connected to the station ground potential. For this purpose,
the cable shield must be connected underneath the cable clamp.
• Avoid routing the signal cable in the vicinity of electrical equipment or switching elements
that can create stray fields, switching pulses and induction. If this is not possible, run the
signal cable through a metal pipe and connect this to operational ground.
• Make sure during installation that the cable is provided with a water trap. For vertical
installation, align the cable glands pointing downward.
Once installation is complete, cut the connecting cable to length as far as the flowmeter sensor.
The transmission signal between the sensor and the transmitter is not amplified, so the
connections need to be routed carefully. Lay the wires in the terminal box so that they are not
affected by vibration.
42
FV4000-VR4
FV4000 / FS4000
FS4000-SR4
D184B097U02
G00708