Service And Troubleshooting Tools - Emerson 5301HxxxxxxxxxxxxxxZZ Series Reference Manual

Service and troubleshooting
April 2019
7.9

Service and troubleshooting tools

7.9.1 Analyzing the measurement signal
Rosemount Radar Master and other tools using enhanced EDDL has powerful functions for
advanced troubleshooting. Using the Echo Curve plot function, an instant view of the tank
signal is shown. Measurement problems can be solved by studying the position and
amplitude of the different pulses.
Note
Figure 7-8
the probe end pulse and the probe end echo threshold line are not visible in an interface
application, they are shown for illustration purposes only.
Figure 7-8: The Echo Curve Function Presents All Visible Echoes
A. Amplitude, mV
B. Distance, m
C. Reference
D. P1 Surface
E. P2 Interface
F. Probe End
G. Interface Threshold
H. Surface Threshold (ATC)
I. Probe End Threshold
J. Reference Threshold
Echo peaks
In a typical measurement situation, the following peaks appear in the echo curve plot:
Reference peak
This peak is caused by the transition between transmitter and the tank vapor space or air.
It is used by the transmitter as a starting reference point for distance to the level surface.
The echo peak amplitude depends on the probe type and installation geometry.
194
illustrates the key elements of a theoretical echo curve. In an actual echo curve,
Reference Manual
00809-0100-4530
Rosemount 5300 Level Transmitter