Siemens XPS15F Bedienerhandbuch PDF herunterladen (Seite 14)

LIQUID APPLICATIONS - STANDPIPES

In many applications access must be made via a standpipe. In such cases, Milltronics can

provide factory bonded flanged transducers or split flange kit that will readily mate to the

flanged standpipe. Another option is to hang the transducer from a blind flange.

The standpipe length should be as short and the diameter as large as possible. As a rule of

thumb, the -3 dB cone of the sound beam should not intersect the standpipe wall in

applications opening into a vessel or larger area. Otherwise, additional blanking will be

required to compensate for the interference zone created by the opening.

flanged

transducer

vessel

no additional blanking required

intersection

vessel

nipple welded into

blind flange

transducer

sound beam

intersects

no vessel

no additional blanking required

near blanking extension

of 150 mm (6") past end of

standpipe may be required.

reflection at

interference zone

created by opening

no additional blanking required

nipple welded into

a blind flange

transducer

can read

level inside

or below

standpipe

end cut on a

45 ° angle

typically

Note: When using a stilling well, make sure there is no build-up, welds, couplings, or other

debris on the inside of the well wall. This can affect reliability of level measurement.

14 XPS/XCT Transducers 7ML19981AK01.2

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Siemens XPS15F Bedienerhandbuch Seite 14