E546-88(1999)e1 Standard Test Method For Frost Point Of Sealed Insulating Glass Units E 546-88 (new 1999 authorized) the standard that hollow glass frost nods checks a method 1. The lab that limits checked a method 1.1 times to stipulate frost of lining of hollow glass air is nodded determines measure, built judgement frost to nod whether under or the basis that some gives prep above or sets temperature. 1.2 levels are right also the instrument that uses in afore-mentioned tests undertook demonstrative. The 1.3 numerical value that use SI unit tabulation to show are a standard. The numerical value in bracket offers reference only 1.4 standards are incorrect and all safe item makes a regulation. If set somewhat, all use circumstance photograph to be united in wedlock with its. The use person of this standard should be in charge of adopting proper safety and healthy measure, restrict conditional applicability certainly before use. About specific danger the specification of the element sees note 2 with accessory X1.1. 2. Consult C 1036 E 77 E 576 3 of standard 2.1ASTM standard. — of 3.1 frost dot and frost nod term the test range of appearance is conterminous next surfaces of touched hollow glass lining appear the temperature when visible frost. The frost dot prep above of hollow glass of — of 3.2 frost condition buys goods square or the checks temperature condition that user place sets. 3.3 not the frost of hollow glass of frost condition — is nodded under buy goods square or the checks temperature condition that user place sets. 4. Test method summarizes 4.1 tests method to use special apparatus. This instrument is substantially by two refrigerant cylindrical plate is formed, a plate places the upper part in another plate, pass the clearance space that can adjust a distance. The diameter of the flowing and cricoid surface that plate exposes on is 25mm (1 In. ) . The temperature of next plate maintains through the action of dry ice in - 78°C (- 109°F) the left and right sides. Fluctuate through adjusting the distance of air space can make go up between plate the temperature of plate is far under freezing point. Wait for test sample going up the shape of smooth slip ring with refrigerant plate apparently place proper time, reduce as the abidance of metallic surface temperature, can be certainly below corresponding air lining apparently the temperature of occurrence frost. 5. Importance and the device that apply place of 5.1 tests method to use basically apply to the hollow glass that the level places. If be used,determine the hollow glass that is not horizontal position, so its check a result to be able to not compare a gender. 6. Instrument and device 6.1 tests device (see a graph 1) : Have fluctuation two cylindrical plate, on insert in plate have thermometer of thermocouple, bimetallic or appropriate temperature sensor; An operating ring; Secure in bedspring bear the has adiabatic crust cylinder on device. Two plate by space of place of space of a paragraph of small air, the distance of air space can be adjusted through operating ring. The diameter of the flowing and cricoid surface that plate exposes on is 25mm (1 In. ) , have abrade or of polishing bright and clean degree. This surface and test sample are conterminous frost is become to nod test surface namely when touching. Through a bedspring bear container of device general dry ice is contacted with next plate, cool next plate thereby and maintain the sublimate temperature in dry ice (- 78°C (- 109°F) ) around. Because solid state plate has good thermal conductivity, because the temperature of these each plate is even essentially. Use operating ring adjusts between two plate the distance of air space, obtain the thermal resistance of a need thereby. Such, should go up the cricoid test surface of plate and sample are conterminous when touching, can be adjusted needs temperature. The diameter of cricoid test surface in this device agrees with the frost dot of the glass that measures the biggest ply to be 6mm. Graph spare parts of Parts List of sketch map of appearance of 1 frost dot expresses Part No. 2 Lower Metal Block of the plate on 1 Upper Metal Block of name of serial number Nomenclature issues 4 Supporting Plate of coping of plate 3 Top Cover, the plate on Upper Metal Block uses 6 Spring of gasket of gripper shoe 5 Spacer, the plate on Upper Metal Block uses bedspring 7 Supporting Plate, 10 Disk of the canister inside 9 Inner Tube of the canister outside the gripper shoe 8 Outer Tube of coping of the canister inside Top Of Inner Tube, disc of Dry Ice Pushing, use at advancing dry ice 11 Clamp, dial Gage clamping apparatus, use at measuring small implement 12 Supporting Ring, bottom Of Inner Tube props up annulus, use at inside 14 Cover Lid of operating ring of canister bottom 13 Control Ring, the 16 Tube of bent housing of cap 15 Elbow of the canister inside Inner Tube, nylon nylon pipe, 17 Main Spring advocate heat source of 22 Heat Source Block of indicator of scale of 21 Dial Indicator of thermometer of disc of bimetallic of 20 Bimetallic Dial Thermometer of bearing of 19 Bearing of gasket of bedspring 18 Spacer board the aluminium alloy that the material of 6.1.1 fluctuation plate can use course positive pole to change processing, its dimension and graph are shown 1 times consistent. The other part of device can be made by any right stuff. The temperature of 6.1.2 courses demarcate is measured plan, for instance thermometer of thermocouple, semiconductor or bimetallic thermometer should have appropriate measurement limits, scale division value is 1°C (2°F) or smaller unit, in whole measure the accuracy inside limits to be ±0.5°C (±1°F) . To the demarcate of bimetallic thermometer the proposal sees accessory X1. 7. The preparation of sample chooses 7.1 times wait for test sample to should be had representative and can the level is placed. 8. The adjustment of sample should be sample 24±3°C in temperature before 8.1 tests (75±5°F) not less than 24h are placed below the environment. 9. 9.1 instruments prepare test measure 9.1.1 through taking out dry ice container and bedspring bear device will ravel frost nods appearance. With soft cloth or wadding careful rub-up checks the surface, do not want cut to check the surface. If there is lunt on instrument surface and lumen, answer complete cleanness. Container of 9.1.2 mount dry ice, rotational operating ring, make the distance of air space is 13mm between fluctuation plate (0.5in. ) . Get on instrument convert in soft cloth next. In the 9.1.3 interlining that enter alcohol or acetone gush dry ice container, ensure the good contact of its and dry ice. broken or graininess dry ice close together accumulation is in container till full graduation mark. With dry ice of bedspring device extruding and locking cap. 9.1.4 the instrument new and erect place, firm installation is in level apparently. Place the instrument enough long time, make the temperature of next plate achieves the temperature of dry ice. Of 9.2 instruments reinstall 9.2.1 to be in test process, as long as dry ice is fast gave out to must weigh new clothes full. Move is as follows: Get on instrument convert in soft cloth, open cap, take out bedspring bear device, repeat next 9.1.3 with 9.1.4. 9.3 frost condition and not frost condition is decided really 9.3.1 by 9.1 or the regulation of 9.2 nods appearance with frost of dry ice fill. Two outside faces of 9.3.2 clean sample. 9.3.3 an argent plating aluminium polyester film (high catoptric lens face, ply does not exceed 0.08mm (0.003in. ) the diameter is 25mm (1in. ) or 25′25mm (1′1in. ) , put in the test apparently, two this filmy surfaces must use acetone or alcohol embellish is wet. Put sample in the center of the instrument. The examination is hollow the appearance below vitreous air layer is possible the area of frost, the attention is possible as promiscuous as frost contamination or eyewinker. However, particle of next apparently tiny foreign body perhaps are helpful for air layer observer is issueing attention concentration apparently likely the area of frost. (see a graph 2) . Graph exterior Lower Air Space Glass Surface Where Frost Is To Be Deposited Www.531718.cn goes up outside the glass of section Upper Exterior Glass Surface of the 2 hollow glass that nod a test with Yu Shuang the air layer of frost issues the likelihood frost of Frost Point Apparatus of the plate on Upper Metal Block of surface of test of hollow glass Measuring Surface nods exterior Sealed Insulating Glass Unit appearance Frost frost 9.3.4 rotational operating ring, between plate of slow and contractible fluctuation the distance of air space. At the same time the temperature of the plate on observation. 9.3.5 pass fine tuning operating ring, will go up the temperature of plate maintains steadily in wait for measure temperature. Temperature wave motion should not exceed ±1°C (2°F) . The time that 9.3.6 sample should keep in afore-mentioned stable temperature is as follows: Designation vitreous ply Mm (In. ) the periodic Min 2.5 of stable temperature (3/32) 3 3.0 (1/8) 3 5.0 (3/16) 4 6.0 (1/4) 5 9.3.7 erase is hollow the condensation content that the surface gets on to had arisen outside glass, or spray clean water in on the surface. 9.3.8 examinations and test surface are conterminous next surfaces of the air layer of touched hollow glass whether frost. To be checked better whether frost, usable fluorescent lamp (the fluorescent lamp bubble of 2 15 tile) or other and similar illume thing enlightens this surface. (see a graph 3) . Graph the 3 frost in using nod appearance 9.3.9 if be in temperature stability cycle or later, below air layer apparently the frost that appears to be seen apparently, so the frost dot prep above of sample should stabilize temperature (frost condition) (concerned frost data sees a graph 4) . Check the afterimage of frost, ensure air layer issues the surface already frost. (4B seeing a graph) . If because very small or agglomerate frost is very faint and cannot undertake distinguishing with contamination or eyewinker particle, should express the test the temperature of the face to reduce 1°C (2°F) Www.531718.cn is inside the cycle of 9.3.6 regulations, maintain this temperature stable. Next, check sample afresh. If deposit is frost, so its dimension or amount will increase or grow in quantity. Graph 4 ply are 5mm (3/16in. ) the Frost Point Range of referenced a collection of illustrative plates of the frost on glass: Zhui paragraph?Frost Point: Frost dot Enlarged 200 Times magnifies the afterimage Measuring Surface of frost of Double Image Of Frost of frost of 200 times Frost Deposit checks glass of Glass #1 1# of layer of air of Air Space of glass of exterior Glass #2 2# to note 1: Numeric - X expresses to nod low X °C than frost. Note 2: What the dimension of frost follows vitreous ply is different and different the 9.3.9.1 frost that realize 9.3.9 regulations very hard on reflection glass nod judgement method. Accordingly, to judge frost, can get off from the instrument sample, take lamplight place to undertake observation. Should going up from the instrument get off 5 seconds of sample in undertake observation. Frost did not discover after the 9.3.10 temperature that if be in,set stabilize cycle, so the frost dot of sample stabilizes temperature under this (not frost condition) . The 9.3.11 test measure that repeat 9.3.3-9.3.10, the test undertakes in other temperature. Limits of temperature of 9.4 frost dot decides the 9.4.1 temperature that reducing continuously according to the regulation of 9.3 really the dot undertakes a series of the test appears till the proof frost condition. Appropriate temperature interval is 10°C (20°F) : For instance of 9.3 regulations - 10°C (20°F) , - 20°C (0°F) , - 30°C (- 20°F) , - 40°C (- 40°F) , - 50°C (- 60°F) . If need,also can undertake a test in other temperature. Frost name a person for a particular job is between the temperature of occurrence frost and next higher temperature. Below the 9.4.2 circumstances that in the basis experience can forecast frost to nod limits (be like new production sample) , the temperature that needs in the vicinity of to predict frost is nodded only undertakes determining. The 9.4.3 frost that will appear when temperature floor level (frost condition) the referenced a collection of illustrative plates with identical temperature limits (see a graph 4) undertake comparative, can be in 9.4.1 determining frost and the frost dot that sample did not estimate in frost temperature limits. Measure the 9.5.1 temperature that are worth a few Celsius from estimation of dot of tower above frost finally what 9.5 frost nod to begin, undertake according to the regulation of 9.4 a series of not the test of frost, frost. In order to be less than 2°C (3°F) interval reduces temperature gradually. If be in,metrical initiative temperature appears frost, should consult graph 4 reappraisal frost is nodded and duplicate tests. 9.5.2 frost dot is to appear for the first time the temperature of visible frost, between the next higher temperature that perhaps checks in this temperature and place. 9.5.3 appear when first time when visible frost, the temperature of the plate on the record regards frost as the dot. 9.5.4 going up with a sample repeat measure frost dot, should let already some frost evaporate completely, or choice distance checks a dot formerly at least 50mm (2 In. ) new test site. Use counterweight to make sample poises. Before undertaking retest, should heat heat source board (see a graph 1, the 22nd part) and with go up plate is brief so that the contact rises on the temperature of plate. 10. Report 10.1 tests report includes following content: Of 10.1.1 sample complete state, include type of ply of dimension, glass, air layer ply, desiccative and amount and sealant type. 10.1.2 if be different from the regulation of 8.1, should make clear sample adjustment temperature 10.1.3 frost nod temperature 11. The 11.1 accuracy that check a method originally through collecting the result that disparate test personnel applies respective test equipment to determine in same and communal lab to decide mix accuracy and deviation deviation. All tests are used same the sample that approves special preparation. 11.2 measure when temperature plan undertook demarcate according to the 6.3 regulations with appendix X1, the deviation that measures frost dot is in 2°C (4°F) in. Http://www.horngjaan.com.tw http://www.531718.cn http://www.a5317.com http://www.076017.com http://www.17tidi.com
Previous12 Next