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Mjk-automation Shuttle Ultrasonic Level Transmitter and Sensor Manual de usuario Pagina 34

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34
GB Shuttle Manual 100316
SW 838023
Fault finding
Shuttle
®
indicates
system error
constantly
Shuttle
®
Setting Is the setting of the active measuring range (Shift + B)
correct? The active measuring range must not be set
lower than the max. possible level.
Level read-
out is not
changing
Ultrasonic
sensor
Sensor Is the sensor mounted ABSOLUTELY VERTICAL?
mounting It is extremely important that the sensor is firmly
mounted in a vertical position. See the section
'Mechanical mounting of sensor'.
Installation Are there for example bit, fatty accumulations or other
site objects disturbing the ultrasonic signal?
Setting Has the learning function been activated? If the
learning function has not been activated, Shuttle
®
may
lock on a false echo.
Level read-
out is wrong
Ultrasonic
sensor
Sensor Is the sensor mounted ABSOLUTELY VERTICAL?
mounting It is extremely important that the sensor is firmly
mounted in a vertical position. See the section
'Mechanical mounting of sensor'.
Cable Is the sensor cable extended with a not-approved
cable type and/or extended beyond 100 m?
Installation Does the ultrasonic sensor have the same temperature
as the ambient air? Deviations will produce measuring
errors!
Shuttle
®
Setting Shuttle
®
level readout may need adjustment.
Level
read-out is
unstable
Ultrasonic
sensor
Sensor Is the sensor mounted ABSOLUTELY VERTICAL?
mounting It is extremely important that the sensor is firmly
mounted in a vertical position. See the section
'Mechanical mounting of sensor'.
Is the sensor mounted firmly? The sensor should be
mounted on a suitable bracket.
Installation Turbulence on the surface.
site Objects on the surface that disturb the measurement.
Strong winds can bend off the echo, so it misses the
ultrasonic sensor.
Shuttle
®
Setting Response time (Shift + C) is set too low.
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