Siemens XPS15F Manual de Instruções descarregar pdf (Página 15)

LIQUID APPLICATIONS - VOLUME

1. Beam should not detect bin bottom. If this occurs use range extension parameters

(on transceivers where available) to omit false echoes. A 6° beam angle represents a

rise : run of about 20 : 1 (10 : 1 for 12°). In most tanks, the transducer should be

centered as much as possible (without interference from inlet) for optimum reading range.

2. Sound beam must be perpendicular to liquid surface.

If standpipe is used, refer to Liquid / Applications - Standpipes.

3. Echo has missed improperly leveled transducer.

4. When performing an empty or full calibration, the tank must contain its normal vapour and

be at its normal temperature.

tank manufacturer’s

empty level

discharge

Empty level for

‘alternate’ location.

Below this level, echo

would reflect away

from the transducer.

may require target to

obtain empty reading

rise

span : corresponds to

tank manufacturer’s

empty level.

beam

angle

tank

manufacturer’s

full level

Maintain full level

for full calibration.

Above this level

erroneous readings

will result as level

has entered

blanking zone.

(shaded area)

‘ Alternate ’

‘ Preferred ’

‘ Bad ’

7ML19981AK01.2 XPS/XCT Transducers 15

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Siemens XPS15F Manual de Instruções Página 15