Vega VEGAFLEX 81 Operating Instructions Manual

Also see for VEGAFLEX 81: Mounting instructions Quick setup guide Operating instructions Operating instructions Operating instructions

Contents

Vega VEGAFLEX 81 Operating Instructions Manual Manual pdf 60 page image

609 Diagnostics and servicingVEGAFLEX 81 • 4 … 20 mA/HART - four-wire42280-EN-160518Fault description Error pattern Cause Rectification5. Measured valuejumps sporadically to100 % during fillingLeveltime0– Changing condensation orcontamination on the probe– Carry out a false signal sup-pression6. Measured valuejumps to ≥ 100 % or0 m distanceLeveltime0– Level echo is no longerdetected in the close rangedue to false signals in the closerange. The sensor goes intooverfill protection mode. Themax. level (0 m distance) aswell as the status message"Overfill protection" are output-ted.– Eliminate false signals in theclose range– Check installation conditions– If possible, switch off the func-tion "Overfill protection"Measurement error during emptyingFault description Error pattern Cause Rectification7. Measured value re-mains unchanged inthe close range duringemptyingLeveltime0– False signal larger than thelevel echo– Level echo too small– Eliminate false signals in theclose range– Remove contamination on theprobe. After having removedthe source of the false signals,the false signal suppressionmust be deleted.– Carry out a new false signalsuppression8. Measured value re-mains reproduciblein one position duringemptyingLeveltime0– Stored false signals in thisposition are larger than thelevel echo– Delete false signal suppression– Carry out a new false signalsuppressionDepending 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.9.5 Exchanging the electronics moduleIf the electronics module is defective, it can be replaced by the user.In Ex applications, only instruments and electronics modules with ap-propriate Ex approval may be used.If there is no electronics module available on site, the electronicsmodule can be ordered through the agency serving you. The electron-Reaction after fault recti-fication24 hour service hotline

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