Dwyer UXF2 - Manual (Page 24)

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3.3. Flow transmitter wiring
3.3.1. Precautions in wiring
(1) Use a special coaxial cable (SX3C) as a signal cable between the detector (SX3) and flow
transmitter (UXF2). Continuous lengths are required. Signal cables may not be spliced or joined.
(2) Be sure to pass the signal cables through a metal conduit between the detector and flow transmitter.
Upstream and downstream signal cables may be put in the same conduit but, to avoid an interference, do
not put the power cable together.
(3) For output signal, use a shielded cable, where possible.
(4) To avoid noise interference, do not run cables through conduits carrying heavy duty or high voltage
lines.
(5) If a ground wire is included in the power cable, connect it to ground as it is.
(6) A power switch is not provided on the instrument and must be mounted separately if required.
(7) Cover unused wiring glands and protect from moisture intrusion.
3.3.2. Applied wiring
Use the following cables.
z Power cable
: 3 or 2 core cabtyre cable.
Nominal cross-sectional area 0.75 mm 2 min.
Finished outer diameter ‡11 mm.
z Output signal cable : 2 or, as required, multiple core cabtyre cable.
Finished outer diameter ‡11 mm.
z Detector-flow transmitter cable : Signal cable by type designation (heat-resisting high-frequency coaxial cable having
50 : of characteristic impedance. In case SX3-A0/B0, provided with one-
side waterproof BNC connector).
Finished outer diameter
‡5 mm.
3.3.3. Treatment of wiring ports
The outer case of flow transmitter is waterproof (IP65). However, if installed in a humid place, the wiring ports must be
made airtight to avoid ingress of moisture, condensation, etc. Be sure to use the waterproof glands furnished with the
instrument in order to ensure the waterproof seal. Hermetically seal unused glands with caps provided.
Do not install the instrument where there is a risk of flooding.
BULLETIN F-70