Azbil MagneW Plus+ MGG14C, Руководство пользователя

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3-7
Electrical wiring (2)
Cables between flowtube and transmitter
Please use a special cable (MGA12W) designated for connecting the flowtube and
transmitter.
Select a signal cable (Azbil’s special cable or a commercially-available shielded cable)
depending on the fluid conductance, cable length, and the diameter of the flowtube. Refer
to the figure below.
-Range where Azbil’s special cable can be used: A and B
-Range where a commercially-available cable can be used: Only A
2.5mm and 5mm Diameter Cable >10mm Diameter Cable
Cable length (m) Cable length (m)
Fluid Conductivity (µs/cm)
Fluid Conductivity (µs/cm)
B. Usage range of dedicated
cable, model MGA12W
B. Usage range
of dedicated
cable, model
MGA12W
A. Usage range of
commercially
available cable
A. Usage range of
commercially
available cable
Figure3-4 Relationship between the fluid conductance and cable length
Specifications of cables between flowtube and transmitter
Cable (between remote flowtube and transmitter):
Length:
Maximum 300 m (depends on the fluid conductance)
Outer diameter: φ 10–12 mm
Signal cable:
Special cable (diameter of 11.4 mm, 0.75 mm 2 ), or an equivalent among
commercially-available shielded cables (e.g., CVVS, CEEV)
Excitation cable: Special cable (φ 10.5 mm, 2 mm 2 ), or an equivalent among
commercially-available shielded cables (e.g., CVV)
Note:
-Always use a shielded cable as a signal cable.