JIS-B-7751-1990-ENG.pdf
J I S B*77CL 90 = 4933b08 0019397 7 JIS UDC 620.1 93.2.05:535-31621.327.5 JAPANESE INDUSTRIAL STANDARD Light-Exposure and Light-and- Water-Exposure Apparatus Enclosed Carbon-Arc Type) Translated and Published by Japanese Standards Association Printed in Japan 17 S COPYRIGHT Japanese Standards Association Licensed by Information Handling Services COPYRIGHT Japanese Standards Association Licensed by Information Handling Services J I S B*7751 90 m 4933608 0019398 9 m In the event of any doubt arising, the original Standard in Japanese is to be final authority. COPYRIGHT Japanese Standards Association Licensed by Information Handling Services COPYRIGHT Japanese Standards Association Licensed by Information Handling Services J I S B*'7751 90 M 4933608 0019399 O UDC 620,193.2.05: 535-31: 621.327.5 JAPANESE INDUSTRIAL STANDARD J I S Light -Exposure and Light-and-Water-Exposure B 7751-1990 Apparatus (Enclosed Carbon-Arc Type) e e e 1, Scope This Japanese Industrial Standard specifies the light-exposure and light- and-water-exposure apparatus (enclosed carbon-arc type) , hereinafter referred to as the “testing machine“, to be used for the tests of light re- sistance and weather resistance of various industrial materials and products. Remarks 1. The testing machine consists of the testing tank, emission part, arc stabilizer, test piece holding device set at the circumference of emission part provided with a rotary mechanism, spray device( ') , drum cooler( ') , thermo- regulator, humidity regulator( 2, for regulating the temperature and humidity in the testing tank, instrumen- tation appliances, etc. Further, an example is shown in Informative Reference Fig. 1. Notes (I) This applies to light-and-water testing machine. (2) This applies to the testing machine provided with a humidity regulator . 2. In this Standard the units and numerical values shown in are in accordance with the traditional units and, appended for informative reference. 2. Definitions For the purpose of this Standard, following definitions apply: light resistance of sunlight. The property difficult to be varied against working weather resistance natural working of sunlight, wind and rain, etc. at outdoor. The property difficult to be varied against light-exposure apparatus A test machine to carry out irradiation of artificial light source resembled to solar light in order to examine property of a part of light resistance in a short time. a Applicable Standards and Reference Standards: See page 29. COPYRIGHT Japanese Standards Association Licensed by Information Handling Services COPYRIGHT Japanese Standards Association Licensed by Information Handling Services J I S B*7751 90 4933b08 OOL9400 3 = 2 B 7751-1990 (4) light-and-water-exposure apparatus A testing machine to carry out intermittent water spray with carrying out irradiation of artificial light source resembled to solar light in order to examine the property of a part of weather resistance in a short time. 3. Classification Testing machines shall be divided according to the fact without spray device or equipped with it into the following two types. (1) Enclosed carbon-arc type light exposure apparatus hereinafter referred to as 'IF typeff. (2) Enclosed carbon-arc type light-and-water-exposure apparatus, hereinafter referred to as “W type“. Further, main specifications of these two type testing machines shall be in accordance with Table 1. Table 1. Main Specifications of Testing Machines device I 1 Rack I I I W 2 Drum type (3 1 system or con- tinuous blast type Exist Intermittent or con- tinuous blast type Tempera- ture regulation regulation Humidity Exist Automatic regulation type or wick (moisture absorption cloth) type Exist Automatic regulation type or wit hou t Note (3) There is such type made capable of carrying out the light resistance test without actuating the spray device and drum cooler by the process where the one lamp out of two lamps equipped to W type is detached and the other lamp is suspended at the middle and the drum is exchanged to rack for F type. 4. Performance 4.1 Emission Part The performance and specifications of emission part shall be in accordance with Table 2. COPYRIGHT Japanese Standards Association Licensed by Information Handling Services COPYRIGHT Japanese Standards Association Licensed by Information Handling Services 3 B 7751-1990 Table 2. Performance and Specifications of Emission Part Item Type of emission part Voltage and current of arc e Carbon electrode (hereafter referred to as llcarbonll) Globe Radiation illuminance on test piece surface( 4 , Content Enclosed type A. C. voltage Permissible range 125 to 145 V Central value 135 V (I 2 %) 15 to 17 A Central value 1 6 A ( I 2 %) Provided that the input voltage is constant. A. C. current Permissible range It is capable of operating for 20 h or more, and ash content is 3. O % or less for carbon having core, and, is O. 5 % or less for that without core. Spectral transmissivity before use 2 % or less at 275 n m 90 % or more at 400 to 700 nm Expansion rate approx. 3 x 10- 6K- In F type, at the position of surface of test piece holder of rack or at the position of 254 -I 1 mm from center of arc in horizontal direction, 500 ? 100 W/m2 (wavelength range 300 to 700 nm) the value when the central value of current of arc of Table 2 is taken as the reference. In W type, two lamps of carbon arc lamp having this radiation illuminance are used. Note ( 4 , The measuring method is in accordance with Annex. 4.2 Test Piece Holding Device The performance and specifications of test piece holding device shall be in accordance with Table 3. The relative positions of test piece holding device, emission part and spray nozzle are shown in Informative Reference Fig. 2. COPYRIGHT Japanese Standards Association Licensed by Information Handling Services COPYRIGHT Japanese Standards Association Licensed by Information Handling Services J I S B*7753 90 W 49336138 0039402 7 W 4 B 7751-1990 Table 3. Performance and Specifications of Test Piece Holding Device Item I Content Rack (for F type) Outer diameter 508 2 3 mm Rotary speed (approx. ) 3 min- (3 rpm or í min- (i rpm 1 1 min- (1 rpm Drum (for W type) Internal diameter 795 rt 10 mm Rotary speed (approx.) 4.3 Spray Device The performance and specifications of spray device shall be in accordance with Table 4. The relative positions of spray nozzles and test piece are shown in Informative Reference Fig. 2. Table 4. Performance and Specifications of Spray Device Item Cycle meter Spray nozzles Pressure reducing valve Water pressure gauge Solenoid valve Content As the* methods of irradiation and spray at least following three classes can be set. 120 min cycle: successively for 18 min irradiation and spray. 60 min cycle: successively for 12 min irradiation and spray. Without spray: accuracy of time is to be -t- O. 5 min. for 102 min irradiation, and for 48 min irradiation, and carry out only irradiation. It is in opposition to the test piece attaching surface, and, capable of performing conical, uniform spraying. Spray water amount; it is capable of obtaining spray water amount (total water amount of four nozzles) of 2.1 1 : O. 1 ilmin at spray pressure of 0.10 MPa (1.0 kgf/cm2). When the supply water pressure is constant between 0.15 to 0.30 MPa (1.5 to 3.0 kgf/cm2), it is able to set the spray pressure at O. 08 to 0.13 MPa (0.8 to 1.3 kgf/cm2). A water pressure gauge specified in JIS B 7505 having highest pressure graduation of O. 3 to 0.6 MPa (3 to 6 kgf/cm2. Scale interval; 0.02 MPa 0.2 kgf/cm2 max. Opening and closing of channel actuate securely according to signal of cycle meter. COPYRIGHT Japanese Standards Association Licensed by Information Handling Services COPYRIGHT Japanese Standards Association Licensed by Information Handling Services J I S B*7751 90 m 4933608 0019403 9 m 5 B 7751-1990 4.4 Thermoregulator The performance and specifications of thermo- regulator shall be in accordance with Table 5. Table 5. Performance and Specifications of Thermoregulator Item Regulation of black panel temperature Black panel thermometer Thermo- regulator Content Setting capable range 60 to 70% or 60 to 93% Fluctuation allowable range At 63OC in set value 2 3OC. Provided that when the atmospheric condition is at 20% grade 5 (20 2 5OC) in standard temperature condition specified in JIS Z 8703 and in W type further the water temperature is 20% or lower. Temperature raising Temp erature lowering Spectral reflectivity Scale Immerse the black panel thermometer into water in water tank regulated at 30 i 1% with remaining its scale part , confirm that the indication stabilizes at 30 2 1% , quickly enter in a water tank regulated at 70 2 l0C, and measure the time until the indication becomes 63%. Its value is to be 10 s or less. Immerse the black panel thermometer into water in water tank regulated at 70 2 1% with remaining its scale part, confirm that the indication stabilizes in the range of 70 2 i%, quickly enter in a water tank regulated at 30 2 1%, and measure the time until the indication becomes 37OC. Its value is to be 10 s or less. When measured according to illumination and geometrical condition d of light reception specified in JIS Z 8722, in the wavelength range 380 to 780 nm the spectral reflectivity (including positive reflection light) of black panel is to be 5 % or less. At highest 80% or loo%, the scale interval is 1%. The black panel temperature can be regulated at tempera- ture in the specified setting capable range. COPYRIGHT Japanese Standards Association Licensed by Information Handling Services COPYRIGHT Japanese Standards Association Licensed by Information Handling Services J I S B*7751 90 E 4933bOô 0019404 O = Item Voltmeter 6 B 7751-1990 Content The voltmeter of grade 2.5 for switchboard specified in JIS C 1102 or that equivalent or superior thereto. 4.5 Humidity Regulator The performance and specifications of humidity regulator shall be in accordance with Table 6. Table 6. Performance and Specifications of Humidity Regulator Item Hum idit y regulation Content Automatic control type outlet of testing tank is 50 ? 5 %. Wick type (non control) air outlet of testing tank is 20 to 50 %. Provided that the environmental humidity is standard humidity condition 65 % grade 20 specified in JIS Z 8703 and at (65 2 20 %) , when the temperature of black panel is 63 ? 3%. The relative humidity at air The relative humidity at 4.6 Instrumentation Appliances The performance and specifications of instrumentation appliances shall be in accordance with Table 7. Ammeter The ammeter of grade 2.5 for switchboard specified in JIS C 1102 or that equivalent or superior thereto, and is capable of reading suitably the arc current. Integrating hour meter Time switch The highest indication 9999.9 h or more The set range Scale interval within 6 min O to 24 h or 24 h min. 4.7 Insulation Resistance The insulation resistance of testing machine shall be not less than 1 MR. 5. Structure and Material 5.1 Testing Tank The testing tank shall be as follows: (1) Structure The testing tank is a tank to carry out light irradiation or light irradiation and water spray, which is provided with an emission part, rack or drum, capable of accumulating water on the bottom part, capable of regulating temperature or temperature and humidity, and in W type further it is such structure that it is built- in with spray nozzle and the like. COPYRIGHT Japanese Standards Association Licensed by Information Handling Services COPYRIGHT Japanese Standards Association Licensed by Information Handling Services J I S B*775L 90 m 4933b08 0039405 2 m 7 B 7751-1990 (2) Material The material of testing tank internal wall is SUS 304 specified in JIS G 4305 or that having corrosion resistance equivalent or superior thereto or that applied with corrosion resistance treatment. 5.2 Emission Part The emission part shall be as follows: (1) Structure The emission part is a carbon arc lamp of a.c. burning to generate arc in inside of enclosed globe, consists of carbon, globe, arc current voltage regulator, carbon holder, etc. and is in ac- cordance with Table 8. Further, the summary is shown in Informative Reference Fig. 3. Item. Carbon Globe Arc current (or voltage) regulator Carbon holder Table 8. Structure of Emission Part Content This is a carbon rod made for use of testing machine, there are two types having core and without core, and those of different type are used as a pair up and down. This is a filter made of heat resistant glass having the purpose to enclose the carbon arc. Further, the shape of globe is indicated in Informative Reference Fig. 4. This is a device to generate arc, to regulate automatical- ly the position of upper part carbon corresponding to variation of the current (or voltage), and to maintain the arc current (or voltage) at the specified value, and as to the system, there are such systems of electro- magnetic coil system, electric motor driving system, etc. There are carbon holders for upper part carbon and lower part carbon and these are capable of fixing the carbon securely. (2) Material Corresponding to the using part, the material has adequate heat resistance, corrosion resistance , moisture resistance or electric insulation. 5 . 3 Arc Stabilizer The arc stabilizer is a device to maintain continuously the stabilized arc , and in arc circuit a resistor, choke transformer , magnetic leakage transformer, etc. are used. Further, in order to enter the arc voltage always in the specified range relative to the variation of input voltage, an arc voltage regulator is provided. 5.4 Test Piece Holding Device The test piece holding device consists of a rack to attach a test piece holder or drum, their rotation mechanism and test piece holder, and is in accordance with Table 9. Further, the structure of main part is shown in Informative Reference a Fig. 2. COPYRIGHT Japanese Standards Association Licensed by Information Handling Services COPYRIGHT Japanese Standards Association Licensed by Information Handling Services J I S B*7753 90 4933b1l8 0039906 9 m 8 B 7751-1990 Table 9. Structure and Material of Test Piece Holding Device Item Rack Drum Rotary mechanism Test piece holder Content The rack is a rotary rack of ring state, is capable of attaching test piece holders of 18 pieces or more (including black panel thermometer and the like), and so as the test piece to receive irradiation of light is able to rotate around the circumference of emission part. The material to be used is SUS 304 specified in JIS G 4307, C 2600 R specified in JIS H 3100 applied with corrosion resistant treatment or the material equivalent or superior thereto. This is a rotary drum of cylinder shape, is capable of attaching test piece holders of 30 pieces (including the black panel thermometer) and so as the test piece to receive uniformly the irradiation of light and water spray, is able to rotate around the circumference of emission
