-97-
Startup of signals is not good
Cause of the poor startup signals
(1) Incorrect detector mounting, dimensions (sensor mounting dimension, outer diameter, etc) and detector mounting
angle
Mount the detector properly.
(2) Interference from acoustic wave (It is likely to happen when the outer diameter is set longer than the actual length.)
Make a setting of the acoustic wave of the fluid type to be 20 to 50m/s lower, and remount the detector again.
Note) 1400m/s is set for water.
b) Noise on the one side
<Cause> <Check>
Dedicated cable on the one side is abnormal. Measure the insulation resistance.
Polarity of connected terminals is inverted. Check the connection
Sensor on the one side is abnormal. Peel off the detector and check the sensitivity
Detector bonding surface is peeling. Peel off the detector and temporarily place it by
grease, etc.
Dedicated cable is disconnecting. Check the continuity.
Poor contact. Check the connection
Trigger
The same
wave height
forms near the trigger
level.
Startup of signals is not good
There is not large difference
among triggering waveform.
Trigger
Waveform with noise on the one side
CH1 : 500mV/div
CH2 : 5V/div
Displacement from the
center of the pipe.
(in case of Z method)
Displacement of the
mounting dimension
Displacement from the
pipe axis.
To Next Page
Loading...
Need help?
General
