Emerson Process Management 5300 manual Signal Quality Metrics, Surface Threshold=, Curve ATC

Rosemount 5300 Series

Reference Manual

00809-0100-4530, Rev BA July 2009

SIGNAL QUALITY METRICS

Figure C-17. Echo curve showing surface peak amplitude, noise peak amplitude, and surface threshold.

Signal Quality Metrics indicates the surface signal integrity compared to the noise. It can be used to schedule maintenance to clean the probe or detect and monitor turbulence, boiling, foam and emulsions.

	P1
mV	Surface Threshold=
	Amplitude Threshold
Amplitude,	Curve (ATC)
	Reference Threshold

3.0 4.0 5.0 6.0

Distance, m

The following diagnostics measurements are available:

Signal Quality is a measurement of the surface peak amplitude (P1) compared to the surface threshold (ATC) and the smallest marginal between the noise and the ATC above the surface (indicated with a circle) compared to the ATC.

The Signal Quality spans from 0 to 10, where 0 indicates a low margin, and 10 indicates a high margin. It indicates how much margin there is until the noise peak is indicated as the surface level.

Surface / Noise Margin is the relationship between surface peak amplitude and the amplitude of the strongest noise peak above the surface. The Surface

/Noise Margin spans from 0 to 10, where 0 indicates a low margin, and 10 indicates a high margin. It indicates how much disturbance the device can handle in the tank.

NOTE!

The signal amplitude and the noise margin depend on probe type and application conditions, as well as the condition of the probe. Even if the probe is clean, Signal Quality and Surface / Noise Margin may not be a 10.

To check if Signal Quality Metrics is supported, do one of the following:

•If “DA1” or “D01” is mentioned in the model code on the label, the device supports Signal Quality Metrics.

Model Code: 530xxxxxxxxxxxxxxxxDA1 or 530xxxxxxxxxxxxxxxxD01xx

•In RRM:

1.Connect to the device.

2.Right click on the device and select Properties.

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