10 Troubleshooting
FLUXUS G801
10.1 Problems with the measurement
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UMFLUXUS_G801V1-0EN, 2020-06-26
If any problem appears which cannot be solved with the help of this operating instruction, contact our sales office and give
a precise description of the problem. Specify the type, the serial number and the firmware version of the transmitter.
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
nameplate below the outer right terminal strip.
• 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.
The message SYSTEM ERROR is displayed.
• Press BRK to return to the main menu.
• If this message is displayed repeatedly, write down the number displayed in the lower line. Track down the situations
when the error is displayed. Contact FLEXIM.
The transmitter does not react when BRK is pressed during the measurement.
• A program code has been defined. Press CLR and enter the program code.
The backlight of the display does not work, but all other functions are available.
• The backlight is defective. This does not affect the other functions of the display. Send the transmitter to FLEXIM for repair.
Date and time are wrong, the measured values are deleted when the transmitter is switched off.
• 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 again, the data backup battery has to be replaced. 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. An interrogation point is displayed after the
physical quantity.
• 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.
• An exclamation point (
!
) in the lower line on the right indicates that the defined upper limit of the flow velocity is
exceeded and, therefore, the measured values are marked as invalid. The limit has to be adapted to the measuring
conditions or the check has to be deactivated.
• If no exclamation point is displayed, a measurement at the selected measuring point is impossible.
Signal loss during the measurement.
• If the pipe was without any pressure and afterwards no measuring signal has been received, contact FLEXIM.
• Wait a moment until the acoustic contact is reestablished. The measurement can be interrupted by a temporarily high
portion of liquid 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 parameters entered for the
measuring point are correct.
