2 For your safety2.1 Authorised personnelAll operations described in this operating instructions manual must becarried out only by trained specialist personnel authorised by the plantoperator.During work on and with the device the required personal protectiveequipment must always be worn.2.2 Appropriate useVEGAPULS 66 is a sensor for continuous level measurement.You can find detailed information on the application range in chapter"Product description".Operational reliability is ensured only if the instrument is properly usedaccording to the specifications in the operating instructions manual aswell as possible supplementary instructions.2.3 Warning about misuseInappropriate or incorrect use of the instrument can give rise toapplication-specific hazards, e.g. vessel overfill or damage to systemcomponents through incorrect mounting or adjustment.2.4 General safety instructionsThis is a state-of-the-art instrument complying with all prevailingregulations and guidelines. The instrument must only be operated in atechnically flawless and reliable condition. The operator is responsiblefor the trouble-free operation of the instrument.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 newregulations.The safety instructions in this operating instructions manual, thenational installation standards as well as the valid safety regulationsand accident 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. Arbitraryconversions or modifications are explicitly forbidden.The safety approval markings and safety tips on the device must alsobe observed.VEGAPULS 66 • Profibus 52 For your safety36521-EN-120301