How To determine The cause Of a Field Failure Based On The Echo Graph
Exit the echo map: first press and hold the down button to not let go, then press and hold the "SET"
button for three seconds to exit the echo map.
Enter the echo map: first press and hold the up button to not let go, then press and hold the "SET"
button, hold it for three seconds and the echo map will appear.
The ultrasonic level meter has a function to be able to see the waveform of the ultrasonic wave
reflected back from the scene. The shape of the echo can roughly determine the cause of the failure at
the scene. Let me explain to you.
When the probe is connected to a metal bracket or flange, because the probe is constantly vibrating,
this vibration can be transmitted to the metal flange, and then reflected back by the metal flange, and
stacked on the probe to form a strong Reflected signal. It will appear that the water level of the pool is
1.Resonance
Figure 1 Echo signal formed by resonance
Figure 2 Resolved echo signal
In the echo graph, the closer to the left, the closer to the probe's echo, and the closer to the right, the
farther away from the probe.
The left picture is the ultrasonic echo picture taken at the scene, and the right picture is a comparison
picture. In the right picture, the part I framed is caused by the resonance between the probe and the
metal bracket. The wave formed by resonance has been freezed. Although the reflected wave is very
clear, the intensity and width cannot be compared with the wave formed by resonance. Therefore, the
ultrasonic level gauge often appears full.
050
EN
7
0
1
7
8
7
2
.0
6
0
9
/2
0
1
8
C
H
/E
N
