…5 Installation
Localized heating / welding
The sensor must not be submitted to localized heating during
installation; take care to remember this is a measuring
instrument.
Figure 22 Localized heat
Environmental rating
Ensure the level of IP rating is correct for the required meter
installation application. IP68 (NEMA 6P) rated meters can be
submerged continuously.
10 m
(30 ft)
IP68 (NEMA 6P)
Figure 23 Within environmental rating
Gasket fitting
Use correctly sized gaskets. Do NOT fit gaskets that extend
into the flow area – the turbulence caused adversely affects
sensor accuracy.
Figure 24
Fit gaskets
Gaskets
same size
as pipe
Fit gaskets same size as pipe
Cable routing
IMPORTANT NOTE
Do not attempt to join signal cable to increase cable
length.
The cable to the sensor must be installed neatly or within a
conduit. Both loose or conduit installations must have a u-bend
below terminal box height to enable any water to run off thus
avoiding any capillary action into the sensor.
Figure 25 Cable routing to enable water run off
Observe the following points when routing signal cables:
• Keep the remote form sensor cable as short as possible
to avoid unnecessary electrical and magnetic pickup.
Lengths* up to 150 m (492 ft) are permitted, but are more
susceptible to unwanted pickup.
• Avoid routing the cable in the vicinity of electrical
equipment or switching elements that can create stray
fields, switching pulses and induction
• Avoid running sensor cables adjacent to those from other
electromagnetic flowmeters, especially in the same cable
ducts, as unwanted magnetic coupling can induce
unwanted signals and cause incorrect operation of the
sensor. Ideally, adjacent cables should be >200 mm
(8 in.) apart.
• Do not damage the sheathing of the cable during
installation.
• Ensure that a drip loop (water trap) is used when installing
the connecting cables for the sensor.
*Sensus
TM
cable is available in 5 and 20 m (15 and 65 ft)
lengths. Renewable energy cable is available as a 10 m
(30 ft) length.
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