The caution hot surface icon indicates important information orwarning about the temperature of product surfaces.Class 1 Laser product. Take adequate measures to protect the eyesand do not view directly with optical instruments.The caution icon indicates important information or warning relatedto the concept discussed in the text. It might indicate the presenceof a hazard which could result in corruption of software or damageto equipment or property.The information icon alerts the reader of important facts andconditions.The tip icon indicates advice on, for example, how to design yourproject or how to use a certain function.Although warning hazards are related to personal injury, it is necessary tounderstand that under certain operational conditions, operation of damagedequipment may result in degraded process performance leading to personal injuryor death. It is important that the user fully complies with all warning andcautionary notices.1.4.2 Document conventions GUID-96DFAB1A-98FE-4B26-8E90-F7CEB14B1AB6 v6• Abbreviations and acronyms in this manual are spelled out in the glossary. Theglossary also contains definitions of important terms.• Push button navigation in the LHMI menu structure is presented by using thepush button icons.For example, to navigate between the options, use and .• HMI menu paths are presented in bold.For example, select Main menu/Settings.• LHMI messages are shown in Courier font.For example, to save the changes in non-volatile memory, select Yes andpress .• Parameter names are shown in italics.For example, the function can be enabled and disabled with the Operationsetting.• Each function block symbol shows the available input/output signal.1MRK 506 383-UEN A Section 1IntroductionLine distance protection REL650 2.2 IEC 13Commissioning manual
