Safety Microscope Illuminating SystemCarl Zeiss Maintenance, Care, Lamp breakage HBO 1006 B 46-0063 e 03/061.5 Hints on Maintenance andCareTo ensure perfect function of the microscopeilluminating system, it is necessary to use onlycomponents and spares marketed or approvedby us. When in doubt, please contact ourservice staff.With the exception of the work described in thismanual, the user must not perform any repairsor changes himself.We would like to emphasize that all otherchanges and repairs must be performed byspecially authorized personnel.Defective instruments or components may onlybe repaired and maintained by our servicedepartment.− After expiry of the average operating time(see data sheets from the lampmanufacturers), the lamps must beexchanged to avoid the risk of explosion!The operating time of the HBO 103 can bechecked on the display of operating hourmeter of the relevant transformer.(Fig. 6)With increasing service life, dirt will depositon the lamp bulb so that homogeneousillumination of the object field is no longerensured.− The lamps must be exchanged as describedin chapter 3.1.− Before each lamp exchange, make sure toallow the HBO 100microscope illuminator tocool down sufficiently long in order toreduce the pressure; wait at least for 15minutes!− Always disconnect the instrument from theline before each lamp exchange or any otherwork inside the instrument.− Clean the housing of the microscopeilluminator when it is dirty.Do not use any solvents.Soak a cleaning cloth in a mixture of waterand washing-up liquid, remove the dirt anddry the housing using a clean cloth.1.6 Advice on lamp breakageIf the HBO lamps have reached their ratedlifetime or their bulbs show advancedblackening, they should be replaced because ofthe increasing risk of explosion.If lamps are operated properly, lamp explosionis very unlikely.For the rare case, that an HBO lamp bursts andthe mercury (Hg) contained in the bulb isreleased, we recommend to follow thisprocedure:− First of all, the persons being nearby shouldinstantly leave the place to avoid inhalingmercury vapor.− Air the laboratory thoroughly (for approx.30 minutes)!− Every lamp housing of a higher-power lampshould be equipped with an individualexhaust device that is not connected to thedomestic air-conditioning system to avoidthat mercury vapor enters this system.− Once the lamp housing has cooled down,collect any mercury residues precipitatedinside the lamp housing by using anadsorbent available from a chemicalssupplier.