Leitz transformer 6v 20w microscope lamps instructions. Available to purchase for immediate download. Below is an extract from the manual converted to text for a quick impression on the content. Leitz transformer 6v 20w microscope lamps instructionsTransformer for the 6v 2oWor2x6v 15W microscope lampslntroduction The lamp current is adjusted with a phase-angle control arranged in the output circuit. With a slight change of the mains voltage the output voltage set remains approx- imately constant. so that the brightness of the lamp is not noticeably affected (3. 0.870) by mains fluctuations of 1 10°70. The output voltage is a SELV (safety extra-low voltage) and may be touched. The instrument is protected against overload by an automatic re-setting temperature limiter. A fuse plug is inserted in the output circuit against short- ing. The supply unit can be installed upright. laid on the workbench or hung on the wall. Before oEning the transformer disconnect it from the mains.