Vega VEGAPULS WL 61 Operating Instructions Manual

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Vega VEGAPULS WL 61 Operating Instructions Manual Manual pdf 43 page image

4311 Diagnosis, asset management and serviceVEGAPULS WL 61 • Two-wire 4 … 20 mA/HART38061-EN-190404CodeText messageCause Rectification DevSpecState in CMD 48M503Measurement reli-ability too lowThe echo/noise ratio is too smallfor reliable measurementCheck installation and processconditionsClean the antennaChange polarisation directionUse instrument with higher sen-sitivityBit 3 ofByte 14 … 24M504Error at a device in-terfaceHardware defect Check connectionsExchanging the electronicsSend instrument for repairBit 4 ofByte 14 … 24M505No echo availableLevel echo can no longer be de-tectedClean the antennaUse a more suitable antenna/sensorRemove possible false echoesOptimize sensor position and ori-entationBit 7 ofByte 14 … 24Tab. 6: Error codes and text messages, information on causes as well as corrective measures11.4 Rectify faultsThe operator of the system is responsible for taking suitable meas-ures to rectify faults.The first measures are:• Evaluation of fault messages• Checking the output signal• Treatment of measurement errorsA smartphone/tablet with the VEGA Tools app or a PC/notebook withthe software PACTware and the suitable DTM offer you further com-prehensive diagnostic possibilities. In many cases, the causes can bedetermined in this way and the faults eliminated.Connect a multimeter in the suitable measuring range according tothe wiring plan. The following table describes possible errors in thecurrent signal and helps to eliminate them:Error Cause Rectification4 … 20 mA signal notstableFluctuating measured value Set damping4 … 20 mA signal miss-ingElectrical connection faulty Check connection, correct, if necessaryVoltage supply missing Check cables for breaks; repair if nec-essaryOperating voltage too low, load resist-ance too highCheck, adapt if necessaryCurrent signal great-er than 22 mA, less than3.6 mASensor electronics defective Exchange the instrument or send it in forrepairReaction when malfunc-tion occursFault rectification4 … 20 mA signal