52 For your safetyVEGAFLEX 82 • 4 … 20 mA/HART - four-wire41830-EN-1710022 For your safety2.1 Authorised personnelAll operations described in this operating instructions manual mustbe carried out only by trained specialist personnel authorised by theplant operator.During work on and with the device the required personal protectiveequipment must always be worn.2.2 Appropriate useVEGAFLEX 82 is a sensor for continuous level measurement.You can find detailed information about the area of application inchapter "Product description".Operational reliability is ensured only if the instrument is properlyused according to the specifications in the operating instructionsmanual as well as possible supplementary instructions.2.3 Warning about incorrect useInappropriate or incorrect use of this product can give rise to applica-tion-specific hazards, e.g. vessel overfill through incorrect mountingor adjustment. Damage to property and persons or environmentalcontamination can result. Also, the protective characteristics of theinstrument can be impaired.2.4 General safety instructionsThis is a state-of-the-art instrument complying with all prevailingregulations and directives. The instrument must only be operated in atechnically flawless and reliable condition. The operator is responsi-ble for the trouble-free operation of the instrument. When measuringaggressive or corrosive media that can cause a dangerous situationif the instrument malfunctions, the operator has to implement suitablemeasures to make sure the instrument is functioning properly.During the entire duration of use, the user is obliged to determine thecompliance of the necessary occupational safety measures with thecurrent valid rules and regulations and also take note of new regula-tions.The safety instructions in this operating instructions manual, the na-tional installation standards as well as the valid safety regulations andaccident prevention rules must be observed by the user.For safety and warranty reasons, any invasive work on the devicebeyond that described in the operating instructions manual may becarried out only by personnel authorised by the manufacturer. Arbi-trary conversions or modifications are explicitly forbidden. For safetyreasons, only the accessory specified by the manufacturer must beused.To avoid any danger, the safety approval markings and safety tips onthe device must also be observed and their meaning looked up in thisoperating instructions manual.