®Instruction ManualNivuMaster Ultrasonic SensorsPage 10 NivuMaster Ultrasonic Sensors - Rev. 06 as of 29.07.20113 General Notes on Safety and Danger3.1 Danger Notes3.1.1 General Danger SignsCautionsare framed and labelled with a warning triangle.Notesare framed and labelled with a “hand“.Danger by electric voltageis framed and labelled with the Symbol on the left.Warningsare framed and labelled with a “STOP“-sign.For connection, initial start-up and operation of the NivuMaster Ultrasonic-Sensors the following information and higher legal regulations (e.g. in GermanyVDE), such as Ex-regulations as well as safety requirements and regulations inorder to avoid accidents, must be observed.All operations, which go beyond steps to install, to connect or to program thedevice, must be carried out by NIVUS staff only due to reasons of safety andguarantee.3.1.2 Special Danger NotesPlease note that due to the operation in the waste water field, transmitter, sen-sors and cables may be loaded with dangerous disease germs. Respectiveprecautionary measures must be taken to avoid damage to one’s health.