Vega VEGACAL 60 Series Safety Manual

Also see for VEGACAL 60 Series: Operating instructions Operating instructions

Contents

Vega VEGACAL 60 Series Safety Manual Manual pdf 7 page image

71 Functional safetyVEGACAL series 60 • Two-wire 4 … 20 mA/HART35593-EN-181129is used, the parameter "SIL" must be activated in the menu level"Service".The parameter adjustment of the interference current influences thesafety-related characteristics. For safety-relevant applications only thefollowing interference currents are permitted:• fail low = <3.6 mA (default value)• fail high = 22 mAThe damping of the output signal must be adapted to the processsafety time.Measured value transmission via HART signal as well as HARTmultidrop mode is not permitted.The effectivity of the set parameters must be checked in a suitableway.• After connecting the instrument, the output signal jumps to the setinterference current (at the end of the switch-on phase)• In mode "Simulation", the signal current can be simulated inde-pendently of the actual levelTo avoid unwanted or unauthorized modification, the set parametersmust be protected against unintentional access:• Activate the password protection in the adjustment software• Activate the PIN on the display and adjustment moduleAccess by means of HART handheld or similar equipment is notpermitted.Protecting against unintentional or unauthorized adjustment can bedone, e.g. by sealing the housing cover.Caution:After a reset of the values, all parameters must be checked or read-justed.1.4 SetupTake note of the mounting and installation instructions in the operatinginstructions manual.In the setup procedure, a check of the safety function by means of aninitial filling is recommended.1.5 Reaction during operation and in case offailureThe adjustment elements or device parameters must not be modifiedduring operation.If modifications have to be made during operation, carefully observethe safety functions.Reaction when malfunc-tions occurDamping of the outputsignalInadmissible modesInspection possibilitiesAccess lockingMounting and installationOperation and interfer-ence