arranged on a carrier element to be tested to generate test data from received electromagnetic radiation the test data are evaluated in a processing system to determine a deviation of the test data from a nominal state of the carrier element the testing device is used to test a carrier element of an elevator installation on which the elevator car is suspended application_number US 201113811504 A description fig1 shows a schematic illustration of an exemplary embodiment of an elevator installation 2 which has an elevator car 22 which can be displaced vertically in an elevator shaft 6 and is connected to a drive unit 23 via carrier elements 21 and a drive pulley 24 further components of the elevator installation 2 e g counterweight and safety apparatuses or details in respect of the suspension of the elevator car 22 e g 1 1 2 1 etc suspension are not shown in fig1 for reasons of clarity however it is understood that the exemplary embodiments described here can be used independently of these components or details mentioned in an exemplary fashion in the elevator installation 2 the elevator installation 2 is furthermore provided with a test device 1 by means of which a carrier element 21 can be tested in the illustrated exemplary embodiment the carrier element 21 comprises a sheath 215 made of plastic in which for example two wire ropes 21 a 21 b are integrated however it is understood that more than two wire ropes can be embedded in the.