Emerson ROSEMOUNT 5300 Dokumentacja Pobierz pdf (Strona 52)

Reference Manual

00809-0600-4026, Rev BA

December 2011

Rosemount Process Radar

4-8

Figure 4-8. Echo Curve plot

indicating that the amplitude

threshold for the interface peak

is too high

If the Interface Threshold is too high, the signal amplitude peak at the

interface between the upper and lower products is not detected.

Recommended Actions

Lower Interface Threshold.

• Strong fixed echo - Bent probe / Probe contacting Nozzle

A bent probe in contact with metal creates a strong echo and

measurement will lock onto the strong echo. Note that contamination also

may create strong disturbance echoes.

Figure 4-9. Measurement data

using a bent probe from refining

best practices

3.0 5.0

The Interface Threshold is above

the interface peak

Amplitude, mV

Distance, m

Interface Threshold

Surface Threshold

Reference Threshold

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 105 106

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Emerson ROSEMOUNT 5300 Dokumentacja Strona 52