6 Maintenance and repairIMPORTANTOnly allow repairs to be conducted by authorised skilled personnel !Kindly inform us in writing of any malfunctions – use the enclosed questionnaire.Important information• Before each repair, turn off the device and disconnect the plug from the mains!• Defective parts may only be replaced with original parts.• First, ensure firm positioning between the ultrasonic transducer and the standard or boosterhorn, as well as between the standard or booster horn and the probe ⇒ very often, the reasonfor malfunctions is an inadequate mechanical coupling of these parts. In addition, follow thedetailed descriptions in chapters 4.3.1 to 4.4!The black housing of the ultrasonic transducer and the aluminium cylinder (ultrasonic oscillatingsystem) must not be twisted toward each other. The ultrasonic oscillating system and its electricalconnections would be damaged as a result.6.1 MaintenanceSONOPULS homogenisers are maintenance-free.Aside from the process-dependent cavitation erosion on the sound-emitting surfaces of theprobes, no other homogeniser parts are subject to wear. Worn out or faulty probes can bereplaced following the instructions in chapters 4.3.1 to 4.4.The devices are calibrated at the time of delivery. A control of the calibration is only required afterrepairs, and will only be conducted by the manufacturer.6.2 Functional checksImportant operating functions can be tested immediately:Display test Press the "+" and "-" keys at the same time. In all display segments, thenumerals 0 to 9 are displayed in ascending order for one second. Then, thevalue that was last saved will appear.Connection test If the ultrasonic transducer is not connected, the power display will go outafter 1 second - the generator turns itself off. Before restarting the generator,connect the transducer; then press the START/STOP key or the key. The setprogram is retained and continues running after start-up.29 / 4451436a GB/2017-101 electronic GmbH & Co. KG • Heinrichstraße 3-4 • 12207 Berlin • Deutschland • info@bandelin.com