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16
Troubleshooting
If any problem appears which cannot be solved with the help of this user manual, contact our sales office and give a pre-
cise 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 (see section 13.4).
Check if the battery is inserted and charged. Connect the power supply. If the power supply is ok, the transducers or an in-
ternal component of the transmitter are defective. The transducers and the transmitter have to be sent to SEBAKMT for
repair.
The message SYSTEM ERROR is displayed
Press key BRK to return to the main menu.
If this message is displayed repeatedly, write down the number in the lower line. Track down the situations when the error
is displayed. Contact SEBAKMT.
The transmitter does not react when key BRK is pressed during the measurement
A program code has been defined. Press key C and enter the program code.
The backlight of the display does not work, but all other functions are available.
Check if the backlight can be switched on by pressing the I/O key (see section 4.3).
The backlight is defective. This problem does not affect the other functions of the display. Send the transmitter to
SEBAKMT for repair.
Date and time are wrong, the measured values are deleted when the transmitter is switched off
The data backup battery has to be replaced. Send the transmitter to SEBAKMT.
An output does not work
Make sure that the outputs are configured correctly. Check the function of the output as described in section 15.1.3. If the
output is defective, contact SEBAKMT.
A measurement is impossible or the measured values substantially differ from the expected values
see section 16.1.
The values of the totalizer are wrong
see section 16.6.
16.1
Problems with the Measurement
A measurement is impossible because no signal is received. A question mark is displayed in the lower line on the
right
• Check if the entered parameters are correct, especially the outer pipe diameter, the pipe wall thickness and the sound
speed of the medium. (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.)
• Make sure that the recommended transducer distance was adjusted when mounting the transducers.
• Make sure that an appropriate measuring point has been selected (see section 16.2).
• Try to establish better acoustic contact between the pipe and the transducers (see section 16.3).
• Enter a lower value for the number of sound paths. The signal attenuation might be too high due to a high medium vis-
cosity or deposits on the inner pipe wall (see section 16.4).
The measuring signal is received but no measured values can be obtained
• An exclamation mark "
!
" in the lower line on the right indicates that the defined upper limit of the flow velocity is exceed-
ed and, therefore, the measured values are marked as invalid. The limit has to be adapted to the measuring conditions or
checking has to be deactivated (see section 11.4).
• If no exclamation mark "
!
" is displayed, a measurement at the selected measuring point is not possible.
Loss of signal during the measurement
• If the pipe had : Was there no measuring signal afterwards? Contact SEBAKMT.
• Wait briefly until acoustic contact is reestablished. The measurement can be interrupted by a temporarily higher propor-
tion of gas bubbles and solids in the medium.
