31 For your safetyVEGAPULS 69 • 4 … 20 mA/HART - four-wire47255-EN-1408011 For your safety1.1 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.1.2 Appropriate useVEGAPULS 69 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.1.3 Warning about incorrect useInappropriate 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.1.4 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 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.The safety approval markings and safety tips on the device must alsobe observed.Depending on the instrument version, the emitting frequencies are inthe C or K band range. The low emitting frequencies are far below theinternationally approved limit values. When used correctly, there is nodanger to health.