In-l<strong>in</strong>e-type washersTable 6-2Mach<strong>in</strong>eTunnel cage washerwash<strong>in</strong>g temperature pre-wash<strong>in</strong>g zone ca 40 - 50 °Cpre-wash<strong>in</strong>g timeca 60 secwash<strong>in</strong>g temperature wash<strong>in</strong>g zone ca 55 - 60 °Cwash<strong>in</strong>g timeca 120 secr<strong>in</strong>s<strong>in</strong>g temperature ca 80 - 90 °Cr<strong>in</strong>s<strong>in</strong>g timeca 50 - 90 secdry<strong>in</strong>g temperature ca 40 - 100 °Cdry<strong>in</strong>g time ca 120 - 240 sec 1detergent concentration2 - 5 ml/lr<strong>in</strong>se aid concentration0,5 - 2 ml/l1The dry<strong>in</strong>g time is largely dependent on the desired dry<strong>in</strong>g result.Steam sterilisersTable 6-3Program Procedure Fractionations(puls<strong>in</strong>g)locks with steam PVP /sterilisation VWODSteam sterilisationtemperature[°C]Dwell time[m<strong>in</strong>] 2Dry<strong>in</strong>gtime [m<strong>in</strong>]Cycle time[m<strong>in</strong>]1 134 3 1 ca 20solids, racks PVP / VWD 1 134 5 2-5 ca 30cages, feed, and FVP / VWD 2 - 4 121 20 10 ca 65bedd<strong>in</strong>gcages made of FVP / VWD 2 - 4 118 40 10 ca 85polycarbonatefilled water bottlesmade of polycarbonatePVP / ICBP 1 118 40 cool<strong>in</strong>g
6.9 Rout<strong>in</strong>e checks and measuresThe rout<strong>in</strong>e measures specified <strong>in</strong> the operator guide and operat<strong>in</strong>g <strong>in</strong>structions should be implemented at the<strong>in</strong>dicated <strong>in</strong>tervals. These measures <strong>in</strong>clude for example:• check of concentration, temperature, pH value or conductivity of the detergent solution,• replacement of the detergent solution by empty<strong>in</strong>g the wash tank (please also see chapter 4.3.2.2.4),• rout<strong>in</strong>e clean<strong>in</strong>g of filters and conta<strong>in</strong>ers,• check for clogg<strong>in</strong>g and correct spray position of jets.6.10 Check of wash<strong>in</strong>g, dry<strong>in</strong>g, and steam sterilisation resultEfficacy checks are of great relevance for an animal facility. For evaluat<strong>in</strong>g the performance of washers, the<strong>in</strong>structions <strong>in</strong> chapter 7 should be followed. For sanitization procedures with H 2O 2/ PAA, <strong>in</strong>dications for rat<strong>in</strong>gthe steriliser performance are provided <strong>in</strong> chapter 4.6.If further checks are recommended or required by the mach<strong>in</strong>e manufacturer, it must be specified <strong>in</strong> the operatorguide. If the operator wishes additional checks, he/she must give details on those as early as when issu<strong>in</strong>ga tender.6.11 Ma<strong>in</strong>tenance measuresFor ensur<strong>in</strong>g a safe and repeatable mach<strong>in</strong>e operation, ma<strong>in</strong>tenance measures, as required by the manufacturer,<strong>in</strong>clud<strong>in</strong>g all necessary <strong>in</strong>spection, ma<strong>in</strong>tenance, and overhaul procedures (def<strong>in</strong>ed accord<strong>in</strong>g to DIN31051), must be done on a regular basis. Only tra<strong>in</strong>ed experts are to implement these measures. Thereby,attention should be paid to the follow<strong>in</strong>g aspects:• All safety <strong>in</strong>structions must be followed.• Process parameters must be checked.• It must be checked if the selected chemicals are suitable for the purpose and used <strong>in</strong> correct concentration.• Manufacturer recommended spare parts must be used.When replac<strong>in</strong>g mach<strong>in</strong>e parts that might cause a change <strong>in</strong> wash<strong>in</strong>g process parameters, an extraord<strong>in</strong>arycheck is required.As ma<strong>in</strong>tenance work requires specialised knowledge and special tool<strong>in</strong>g, conclud<strong>in</strong>g a ma<strong>in</strong>tenance contractwith the manufacturer is strongly recommended. Moreover, such a contract might be a prerequisite for assert<strong>in</strong>gwarranty claims.7 Performance evaluation checks for wash<strong>in</strong>g systemsFor evaluat<strong>in</strong>g a flawless operation, it is necessary to check the wash<strong>in</strong>g, decontam<strong>in</strong>ation, r<strong>in</strong>s<strong>in</strong>g, and dry<strong>in</strong>gperformance of a mach<strong>in</strong>e. Please f<strong>in</strong>d below pr<strong>in</strong>ciple requirements and methods for performance evaluation:7.1 Requirements7.1.1 Wash<strong>in</strong>gWash<strong>in</strong>g generally means the process of remov<strong>in</strong>g soil<strong>in</strong>g off objects to a degree required for further process<strong>in</strong>gor <strong>in</strong>tended item use.7.1.2 Decontam<strong>in</strong>ationThe decontam<strong>in</strong>ation process consists of a wash<strong>in</strong>g procedure and a process-<strong>in</strong>duced sanitization that is importantfor further use of an item that requires a def<strong>in</strong>ed hygienic status. Steam sterilisation alone is not sufficient.The required status will be achieved with a reduction of microorganisms of, by def<strong>in</strong>ition, at least a log 10reduction factor of 5.7.1.3. R<strong>in</strong>s<strong>in</strong>gThe r<strong>in</strong>s<strong>in</strong>g process must ensure a sufficient removal of all chemical residues from the items <strong>in</strong> a process<strong>in</strong>gcycle. When us<strong>in</strong>g alkal<strong>in</strong>e or acid detergents, no residues must rema<strong>in</strong> on the items’ surface, which can beverified by means of pH <strong>in</strong>dicators.Cage Process<strong>in</strong>g <strong>in</strong> <strong>Animal</strong> <strong>Facilities</strong> · 4th issue · 2013 47
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