APG IRU-9400 user manual - Manual (Page 8)

IRU Series
Rev. B1 3/10
8
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4. Always mount above the highest anticipated target level by at least the
published minimum blanking distance. If a target enters into the blanking
area, error in the detection will occur. It is always advisable to allow for
sufficient headroom to ensure that the target does not enter the blanking
area.
5. Generally it is advisable to mount the sensor away from any vessel fill
spouts. However, if heavy foam is expected, it is often helpful to mount the
sensor near a fill spout where the foam is being dispersed.
6. Avoid mounting the sensor in the direct center of a tank with a significantly
domed top. A domed top can act as parabolic dish, amplifying small
undesired signals that may be present inside the tank.
7. Avoid mounting the sensor in close proximity to tank walls, especially
on tanks with corrugated walls or in applications where product buildup on
the tank walls may occur.
BEST GOOD
NPT Mounting
A half-coupler is preferable to a full-coupler to help ensure that the sensor face
extends below the mounting fixture. The coupler must be aligned so that the
sensor face is perpendicular to the target surface. Thread the sensor into the
coupler only hand tight.