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1、INTERNATIONAL STANDARD ISO 9022-11 First edition 1994-07-15 Optics and Optical instruments - Environmental test methods - Part 11: Mould growth Op tique et ins trumen ts d optique - Methodes d essais d environnemen t - Partie 11: Moisissures Weference number ISO 90224 1: 1994(E) ISO 902211:1994(E) F
2、oreword ISO (the International Organization for Standardization) is a worldwide federation of national Standards bodies (ISO member bodies). The work of preparing International Standards is normal numbers, etc. shall be punched Prior to applying the coating. Sterilize specimens at a temperature of 1
3、80 “C to 200 “C before applying lubricants as a thin film on one side only. Use glass hooks or Polyamide threads for suspending the specimens in the exposure chamber. 3.5 Incubation cabinets and climatic chambers The specimens inoculated with the mixed Spore sus- Pension shall be incubated in incuba
4、tion cabinets or climatic chambers under the climatic conditions specified in clause 4. The incubation cabinets or climatic chambers shall be adjustable to 29 “C + 1 “C and the temperature may vary in time by otherwise, the test is unac- ceptable and shall be repeated. Unless otherwise specified in
5、the relevant specifi- cation, evaluate the specimens at the end of the conditioning period without leaving them to dry first. On no account shall specimens be cleaned Prior to evaluating the mould growth. If a comparative corro- sion evaluation is required, carefully remove the mycelia, using water
6、and a soft cloth, after the evalu- ation of the mould growth. 5.5 Evaluation For the evaluation of the extent of mould growth, re- fer to table5. If, in addition to mould growth evalu- ation, evaluation of corrosion darnage due to mould growth is required, remove the mycelia and compare the specimen
7、s with the non-inoculated specimens. 5.6 General level for acceptance Unless otherwise specified in the relevant specifi- cation, the test shall be accepted as successful if the amount of growth is less than or equal to grade 2 in table 5. Table 5 - Evaluation of the extent of mould growth Surface o
8、f Amount of Substrate growth covered Extent of growth grade % I 0 1) 0 Substrate is devoid of mould growth 1 1) 2 more than Sparse or very restricted OtolO mould growth (traces) more than Intermittent or loosely 10 to 30 spread mould colonies on Substrate surface (visible with the naked eye) 3 more
9、than Substantial amount of 30 to 70 mould growth (easily vis- ible) more than Massive mould growth 70 I 1) Use x 50 magnification with appropriate illumination when evaluating these grades. 5 -,-,- ISO 9022=11:1994(E) 0 ISO 6 Environmental test code The environmental test code shall be as specified
10、in ISO 9022-1. EXAMPLE The environmental test of material for Optical instru- ments for resistance to mould growth, conditioning method 85, degree of severity 01, state of Operation 1, shall be identified as: Environmental test ISO 9022-85-01-1 7 Specification The relevant specification shall contai
11、n the following details: a) environmental test Code; b) number of specimens; c) type and dimensions of specimens; d) arrangement and Position of the specimens in the conditioning cabinet or climatic chamber; e) where appropriate: identification of the fungal strains of the species of fungi listed in
12、 table 1; f) number and type of non-contaminated specimens; ) requirements regarding air circulation in the con- ditioning chamber; ) requirements with respect to recording the tem- perature and relative humidity; type and scope of initial test; k) preconditioning if other than specified in 5.2; rec
13、overy if other than specified in 5,4; 1) type and scope of final test; m) criteria for evaluation, taking into account 5.5; n) type and scope of test report. 6 ISO 9022-11: 1994( E) 0 ISO relatively satisfactory, albeit temporary, protection from mould infestation tan be achieved by employing fungic
14、ides. Care should however be taken to ensure that spores enclosed during instrument assembly are destroyed to as large an extent as possible. Furthermore, desiccator cartridges may be placed in internal compartments in Order to keep the relative humidity below 65 %, thus preventing fungi from germin
15、ating and growing. Materials of an organic nature, such as leather, Paper and other cellulose derivatives, textiles, felt, oil var- nishes, and vegetable and animal oils and fats, are most susceptible to mould growth. Unplasticized synthetic material with or without inor- ganic fillers is fairly unl
16、ikely to be infested, while such material, if plasticized or containing organic fillers, is susceptible to mould infestation, the grade of sus- ceptibility depending upon the type of plasticizer used. Derivatives of fatty acids, for instance, are par- ticularly conducive to mould growth whereas thos
17、e of phthalic acids are less stimulating. When selecting fungicides for incorporation into ma- terials or for impregnation of materials and varnishes, the following Points should be taken into consider- ation. a) The volatilization pressure of the fungicide, at ambient temperature, shall be high eno
18、ugh to maintain anywhere within the instrument a con- centration sufficient to prevent mould growth; however, condensation of the fungicide on Optical surfaces, or corrosion of components caused by the fungicide, is unacceptable. b) Operational and testing temperatures of the in- strument shall not
19、degrade the stability of the fungicide. c) The fungicide shall not be soluble in water. d) The volatilization pressure of the fungicide shall be standardized to be effective over an optimal period. e) Fungi may become resistant to a fungicide at- tacking them over a prolonged period. f) The effectiv
20、eness of fungicides used in compart- ments that are not absolutely airtight will be limi- ted in time. 8 -,-,- This page intentionally left blank This page intentionally left blank -,-,- This page intentionally left blank -,-,- ISO 9022=11:1994(E) ES 37.020.00 Descriptors: optics, optical equipment, tests, environmental tests, mould growth tests. Price based on 8 pages -,-,-