82 For Your SafetyUser groupsFor the handling of the Lambda Transmitter LT2, three user groups are required:• Service technicians of LAMTEC or its OEM customers and/or trained customer personnel:– Qualified technicians/engineers have very good knowledge of the device.– SERVICE access level - password-protected• Operators, customer fitters, technicians for instrumentation and control technology, elec-tricians, and electronic engineers have introductory knowledge of the device.– CUSTOMER access level - password-protected• Operating personnel with basic knowledge– OPERATION access level - no password2.4 Safety Equipment/Safety MeasuresHazards from electrical equipmentThe LT2 Lambda Transmitter and the Lambda Probe is equipment for use in industrial electri-cal power installations. Always switch off the power when working on mains connections ormains voltage. If shrouding (for electrical safety) has been removed, reattach it before switch-ing on the power supply again. Damage to health or equipment may result from improper useor improper handling.NOTICETo avoid damage, always observe the respective security notices.Preventive measures for improving operating safetyIf the LT2 is used in conjunction with control and monitoring technology, the operator must en-sure that any breakdown or failure of the LT2 device does not cause inadmissible damage ordangerous operating states. To avoid faults which could cause direct or indirect personal ormaterial damage, the operator must ensure that:• the responsible maintenance personnel can be reached at any time and as quickly as pos-sible• the maintenance personnel are trained to correctly respond to faults with the LT2 LambdaTransmitter and the associated malfunctions• in the case of doubt, the faulty equipment can be switched off immediately• A switch-off does not lead to direct follow-up problems.Avoiding consequential damagesTo avoid consequential damages in the event of failure, which could cause direct or indirectpersonal or material damage, the owner must ensure that qualified personnel can assess thefaults and initiate appropriate measures to tackle them.