4311 Diagnosis, asset management and serviceVEGAPULS WL 61 • 4 … 20 mA/HART - two-wire38061-EN-170830Measurement error during emptyingFault description Error pattern Cause Rectification11. Measured value re-mains unchanged inthe close range duringemptyingLeveltime0• False signal larger than the levelecho• Level echo too small• Eliminate false signal in theclose range. Check: Antennamust protrude from the socket• Remove contamination on theantenna• In case of interferences due toinstallations in the close range:Change polarisation direction• After eliminating the false sig-nals, the false signal suppres-sion must be deleted. Carry outa new false signal suppression12. Measured valuejumps towards 0 %during emptyingLeveltime0• Echo from the tank bottomlarger than the level echo, forexample, with products withεr < 2.5 oil-based, solvents• Check parameters Mediumtype, Vessel height and Floorform, adapt if necessary13. Measured valuejumps sporadically to-wards 100 % duringemptyingLeveltime0• Varying condensation or con-tamination on the antenna • Carry out false signal suppres-sion or increase false signalsuppression in the close rangeby editing• With bulk solids, use radar sen-sor with purging air connectionDepending on the reason for the fault and the measures taken, thesteps described in chapter "Setup" must be carried out again or mustbe checked for plausibility and completeness.Should these measures not be successful, please call in urgent casesthe VEGA service hotline under the phone no. +49 1805 858550.The hotline is also available outside normal working hours, sevendays a week around the clock.Since we offer this service worldwide, the support is provided inEnglish. The service itself is free of charge, the only costs involved arethe normal call charges.11.5 Software updateThe following components are required to update the instrumentsoftware:• Instrument• Voltage supply• Interface adapter VEGACONNECT• PC with PACTware• Current instrument software as fileYou can find the current instrument software as well as detailedinformation on the procedure in the download area of our homepage:www.vega.com.Reaction after fault recti-fication24 hour service hotline