Flexim FLUXUS WD, Operating Instruction

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10 Troubleshooting
FLUXUS WD 10.1 Problems with the measurement
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UMFLUXUS_WDV1-3EN, 2018-07-16
The display does not work at all or fails regularly
Check the contrast setting of the transmitter or enter the HotCode
555000
to set the display to medium contrast.
Make sure that the correct voltage is available at the terminals. The destined transmitter voltage is indicated on the name-
plate below the outer right terminal.
If the power supply is OK, the transducers or an internal component of the transmitter are defective. The transducers and
the transmitter have to be sent to FLEXIM for repair.
If the transmitter is only connected via the USB interface, the backlight will be switched off.
An error is displayed in the status indication (symbol )
Press key to return to the main menu. Select
Special functions\System settings\Event log
. Press
ENTER. The error message list will be displayed.
Date and time are wrong, the measured values are deleted when the transmitter is switched off
The data backup battery has to be replaced if the date and the time are reset or wrong or the measured values are deleted
after the transmitter has been switched off and on. Send the transmitter to FLEXIM.
An output does not work
Make sure that the outputs are configured correctly. Check the function of the output. If the output is defective, contact
FLEXIM.
10.1 Problems with the measurement
A measurement is not possible because no signal is received. A question mark is displayed after the physical
quantity. The LED lights red after starting the measurement.
• Check whether the entered parameters are correct, especially the outer pipe diameter, the pipe wall thickness and the
sound speed of the fluid. Typical errors: The circumference or the radius was entered instead of the diameter. The inner
pipe diameter was entered instead of the outer pipe diameter.
• Check the number of sound paths.
• Make sure that the recommended transducer distance was adjusted when mounting the transducers.
• Make sure that an appropriate measuring point is selected and the number of sound paths was entered correctly.
• Try to establish a better acoustic contact between the pipe and the transducers.
• Enter a lower value for the number of sound paths. The signal attenuation might be too high due to a high fluid viscosity
or deposits on the inner pipe wall.
The measuring signal is received but no measured values can be obtained
• If the defined upper or lower limit of the flow velocity is exceeded or below,
UNDEF
and an exclamation point will be dis-
played after the physical quantity. The measured values are marked as invalid. The limit has to be adapted to the mea-
suring conditions.
• If no exclamation point is displayed, a measurement at the selected measuring point is impossible.
Signal loss during the measurement
• If there is no measuring signal after the pipe had been run empty and refilled, contact FLEXIM.
• Wait a moment until the acoustic contact is reestablished. The measurement can be interrupted due to a temporarily
higher proportion of gas bubbles and solids in the fluid.
The measured values substantially differ from the expected values
• Wrong measured values are often caused by wrong parameters. Make sure that the entered parameters are correct for
the measuring point.