Vega VEGAPULS WL 61 Operating Instructions Manual

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Vega VEGAPULS WL 61 Operating Instructions Manual Manual pdf 37 page image

379 Diagnosis, asset management and serviceVEGAPULS WL 61 • Profibus PA38062-EN-190128CodeText messageCause Rectification DevSpecDiagnosis BitsM503Measurement reli-ability too low• The echo/noise ratio is too smallfor reliable measurement • Check installation and processconditions• Clean the antenna• Change polarisation direction• Use instrument with highersensitivityBit 16M504Error at a device in-terface• Hardware defect • Check connections• Exchanging the electronics• Send instrument for repairBit 17M505No echo available• Level echo can no longer bedetected • Clean the antenna• Use a more suitable antenna/sensor• Remove possible false echoes• Optimize sensor position andorientationBit 21Tab. 6: Error codes and text messages, information on causes as well as corrective measures9.4 Rectify faultsThe operator of the system is responsible for taking suitable meas-ures to rectify faults.The first measures are:• Evaluation of fault messages via the adjustment device• Checking the output signal• Treatment of measurement errorsFurther comprehensive diagnostics options are available with a PCwith PACTware and the suitable DTM. In many cases, the reasons canbe determined in this way and faults rectified.The below tables show typical examples of application-related meas-urement errors with liquids. The measurement errors are differentiatedaccording to the following:• Constant level• Filling• EmptyingThe images in column "Error pattern" show the real level as a brokenline and the level displayed by the sensor as a continuous line.Reaction when malfunc-tion occursProcedure for fault recti-ficationTreatment of measure-ment errors with liquids