natgillin/translations-raw huggingface dataset:
The manufacturer is responsible for carrying out a statistical study of the test results and for defining, in agreement with the Type Approval Authority, criteria governing acceptability of his products in order to meet the specification laid down for verification of conformity of products in paragraph 9.1 of this Regulation.
Nato je treba vzorce dobro sprati z destilirano vodo, ki pri temperaturi 23 °C ± 5 °C ne vsebuje več kot 0,2 odstotka primesi, in jih obrisati z mehko krpo.
The criteria governing acceptability shall be such that, with a confidence level of 95 per cent, the minimum probability of passing a spot check in accordance with Annex 7 (first sampling) would be 0,95.
Po preskusu odpornosti proti okoljskim dejavnikom ne sme biti na zunanji površini vzorcev nobenih razpok, prask, drobcev in deformacij, srednja vrednost spremembe stopnje prepustnosti svetlobe Δt=(T2-T3)/T2, ki se pri treh vzorcih izmeri po postopku iz Dodatka 2 k tej prilogi, pa ne sme biti večja od 0,020 (Δtm < 0,020).
When the driving beam is reciprocally incorporated with the passing beam, HV in the case of the driving beam shall be the same measuring point as in the case of the passing beam.
Po preskusu odpornosti proti kemičnim dejavnikom ne sme biti na vzorcih nobenih sledi kemičnega obarvanja, ki bi lahko povzročilo spremenjeno razprševanje svetlobe, pri čemer srednja vrednost spremembe Δd =(T5-T4)/T2, ki se pri treh vzorcih izmeri po postopku iz Dodatka 2 k tej prilogi, ne sme biti večja od 0,020 (Δdm < 0,020).
‘HL’ and ‘HR’: points on ‘H-H’ located at 2,6 degrees to the left and to the right of point HV respectively.
Odpornost proti sevanju svetlobnega vira
ANNEX 6
Po potrebi se opravi naslednji preskus:
REQUIREMENTS FOR SYSTEMS INCORPORATING LENSES OF PLASTIC MATERIAL: TESTING OF LENS OR MATERIAL SAMPLES AND COMPLETE SYSTEMS OR PART(S) OF SYSTEMS
Ravni vzorci vsakega elementa sistema iz plastičnega materiala, ki se uporablja za prepuščanje svetlobe, se izpostavijo svetlobi svetlobnega vira.
The samples supplied pursuant to paragraph 2.2.4 of this Regulation shall satisfy the specifications indicated in paragraphs 2.1 to 2.5 below.
Parametri, kot so koti in razdalje med vzorci, morajo biti enaki kot v sistemu.
The set of samples of complete systems or part thereof supplied pursuant to paragraph 2.2.3 of this Regulation and incorporating lenses of plastic material shall, with regard to the lens material, satisfy the specifications indicated in paragraph 2.6 below.
Vsi vzorci morajo biti iste barve in po potrebi enako površinsko obdelani kot deli sistema.
The samples of lenses of plastic material or samples of material shall be subjected, with the reflector to which they are intended to be fitted (where applicable), to approval tests in the chronological order indicated in Table A reproduced in Appendix 1 to this annex.
Po 1500 urah neprekinjenega izpostavljanja morajo kolorimetrične specifikacije oddane svetlobe ustrezati novemu svetlobnemu viru, na površini vzorcev pa ne sme biti razpok, prask, lusk ali deformacij.
However, if the system manufacturer can prove that the product has already passed the tests prescribed in paragraphs 2.1 to 2.5 below, or the equivalent tests pursuant to another Regulation, those tests do not need to be repeated; only the tests prescribed in Appendix 1, Table B, shall be mandatory.
Preskus odpornosti notranjih materialov proti ultravijoličnemu sevanju svetlobnega vira ni potrebno, če se uporabi svetlobni vir v skladu s Pravilnikom št. 37 in/ali svetlobni vir z nizkim ultravijoličnim sevanjem, ki deluje na principu razelektritve v plinu, in/ali moduli LED z nizkim ultravijoličnim sevanjem ali če se sprejmejo določbe za zaščito ustreznih sestavnih delov sistema pred ultravijoličnim sevanjem, na primer s filtri iz stekla.
If the system or part thereof is designed for right-hand installation only, or for left-hand installation only, tests pursuant to this annex may be done on one sample only, at the choice of the applicant.
Odpornost proti čistilom in ogljikovodikom
TESTS
Odpornost proti čistilom
Resistance to temperature changes
Zunanja površina treh vzorcev (leč ali vzorcev materiala) se segreje na 50 °C ± 5 °C in se za pet minut potopi v mešanico, katere temperatura je 23 °C ± 5 °C in ki vsebuje 99 delov destilirane vode z največ 0,02 odstotka primesi in en del alkilarilsulfonata.
Tests
Po preskusu se vzorci posušijo pri 50 °C ± 5 °C.
Three new samples (lenses) shall be subjected to five cycles of temperature and humidity (RH = relative humidity) change in accordance with the following programme:
Površina vzorcev se očisti z vlažno krpo.
3 hours at 40 °C ± 2 °C and 85-95 per cent RH;
Odpornost proti ogljikovodikom
1 hour at 23 °C ± 5 °C and 60-75 per cent RH;
Nato je treba zunanjo površino teh treh vzorcev eno minuto rahlo drgniti s kosom bombažnega blaga, prepojenega z mešanico iz 70 odstotkov n-heptana in 30 odstotkov toluena (volumski odstotki), potem pa pustiti, da se posuši na zraku.
15 hours at – 30 °C ± 2 °C;
Po zaporedno opravljenih obeh zgornjih preskusih srednja vrednost spremembe stopnje prepustnosti svetlobe Δt = (T2-T3)/T2, ki se pri treh vzorcih izmeri po postopku, opisanem v Dodatku 2 k tej prilogi, ne sme biti večja od 0,010 (Δtm ≤ 0,010).
3 hours at 80 °C ± 2 °C;
Odpornost proti mehanskim poškodbam
Before this test, the samples shall be kept at 23 °C ± 5 °C and 60-75 per cent RH for at least four hours.
Metoda preskušanja odpornosti proti mehanskim poškodbam
Note: The periods of one hour at 23 °C ± 5 °C shall include the periods of transition from one temperature to another which are needed in order to avoid thermal shock effects.
Zunanjo površino treh novih vzorcev (leč) je treba preskušati po metodi, opisani v Dodatku 3 k tej prilogi, s katero je treba doseči enakomerno mehansko poškodbo te površine.
Photometric measurements
Po tem preskusu je treba spremembe
Method
prepuščanja svetlobe : Δt = (T2 – T3)/T2
Photometric measurements shall be carried out on the samples before and after the test.
in razpršenosti svetlobe : Δd = (T5 – T4)/T2
These measurements shall be made according to Annex 9 to this Regulation, at the following points:
Preskus oprijema prevlek (če obstajajo)
B50L and 50V for the class C passing beam lighting;
Priprava vzorca
Imax for the driving beam of a system.
Na prevleki leče se na površini 20 mm × 20 mm z britvico ali iglo vreže mrežasti vzorec s kvadratki velikosti približno 2 mm × 2 mm.
Results
Pritisk na britvico ali iglo mora biti zadosten, da se prereže vsaj prevleka.
The variation between the photometric values measured on each sample before and after the test shall not exceed 10 per cent including the tolerances of the photometric procedure.
Opis preskusa
Resistance to atmospheric and chemical agents
Uporabi se lepilni trak s silo oprijema 2 N/(cm širine) ± 20 %, izmerjeno v normalnih okoliščinah, opisanih v Dodatku 4 k tej prilogi.
Resistance to atmospheric agents
Ta lepilni trak, ki mora biti širok vsaj 25 mm, se za najmanj pet minut pritisne na površino, ki je bila pripravljena skladno z zahtevami iz odstavka 2.5.1.
Three new samples (lenses or samples of material) shall be exposed to radiation from a source having a spectral energy distribution similar to that of a black body at a temperature between 5500 K and 6000 K. Appropriate filters shall be placed between the source and the samples so as to reduce as far as possible radiation with wave lengths smaller than 295 nm and greater than 2500 nm.
Nato se konec lepilnega traku obremeni tako, da se sila oprijema na zadevni površini izravna s silo, ki deluje pravokotno na to površino.
The samples shall be exposed to an energetic illumination of 1200 W/m2 ± 200 W/m2 for a period such that the luminous energy that they receive is equal to 4500 MJ/m2 ± 200 MJ/m2.
Tedaj je treba lepilni trak odtrgati z enakomerno hitrostjo 1,5 m/s ± 0,2 m/s.
Within the enclosure, the temperature measured on the black panel placed on a level with the samples shall be 50 °C ± 5 °C.
Na mrežasti površini ne sme biti znatnih poškodb.
In order to ensure a regular exposure, the samples shall revolve around the source of radiation at a speed between 1 and 5 min– 1.
Poškodbe na presečiščih kvadratov ali na robovih vreznin so dovoljene, če poškodovana površina ne presega 15 odstotkov površine z mrežastim vzorcem.
The samples shall be sprayed with distilled water of conductivity lower than 1 mS/m at a temperature of 23 °C ± 5 °C, in accordance with the following cycle:
Preskusi celotnega sistema z vgrajeno lečo iz plastičnega materiala
Spraying: 5 minutes; drying: 25 minutes.
Odpornost površine leče proti mehanskim poškodbam
Resistance to chemical agents
Na leči vzorca sistema št. 1 se opravi preskus, opisan v odstavku 2.4.1.
After the test described in paragraph 2.2.1 above and the measurement described in paragraph 2.2.3.1 below have been carried out, the outer face of the said three samples shall be treated as described in paragraph 2.2.2.2 with the mixture defined in paragraph 2.2.2.1 below.
Po opravljenem preskusu rezultati fotometričnih meritev, opravljenih na sistemu ali njegovih delih v skladu s tem pravilnikom, ne smejo za več kot 30 odstotkov presegati najvišjih vrednosti, predpisanih v točki B50L, in ne smejo biti za več kot 10 odstotkov pod najnižjimi vrednostmi, predpisanimi v točki 75R, če je primerno.
The test mixture shall be composed of 61,5 per cent n-heptane, 12,5 per cent toluene, 7,5 per cent ethyl tetrachloride, 12,5 per cent trichloroethylene and 6 per cent xylene (volume per cent).
Na leči vzorca enote št. 2 se opravi preskus, opisan v odstavku 2.5.
Application of the test mixture
PREVERJANJE SKLADNOSTI PROIZVODNJE
Soak a piece of cotton cloth (as per ISO 105) until saturation with the mixture defined in paragraph 2.2.2.1 above and, within 10 seconds, apply it for 10 minutes to the outer face of the sample at a pressure of 50 N/cm2, corresponding to an effort of 100 N applied on a test surface of 14 × 14 mm.
V zvezi z materiali, uporabljenimi pri izdelavi leč, se šteje, da enote proizvodne serije ustrezajo zahtevam tega pravilnika, če:
During this 10-minute period, the cloth pad shall be soaked again with the mixture so that the composition of the liquid applied is continuously identical with that of the test mixture prescribed.
se po preskusu odpornosti proti kemičnim dejavnikom ter po preskusu odpornosti proti čistilom in ogljikovodikom na zunanji površini vzorcev ne pojavijo razpoke, drobci ali deformacije, ki so vidni s prostim očesom (glej odstavke 2.2.2, 2.3.1 in 2.3.2 te priloge);
During the period of application, it is permissible to compensate the pressure applied to the sample in order to prevent it from causing cracks.
so po preskusu, opisanem v odstavku 2.6.1.1, fotometrične vrednosti na merilnih točkah, navedenih v odstavku 2.6.1.2, znotraj mejnih vrednosti, ki so v tem pravilniku predpisane za skladnost proizvodnje.
Cleaning
Če rezultati preskusov ne izpolnjujejo zahtev, je treba preskuse ponoviti na drugem naključno izbranem vzorcu sistemov.
At the end of the application of the test mixture, the samples shall be dried in the open air and then washed with the solution described in paragraph 2.3 (Resistance to detergents and hydrocarbons) at 23 °C ± 5 °C.
Dodatek 1
Afterwards the samples shall be carefully rinsed with distilled water containing not more than 0,2 per cent impurities at 23 °C ± 5 °C and then wiped off with a soft cloth.
ČASOVNO ZAPOREDJE HOMOLOGACIJSKIH PRESKUSOV
After the test of resistance to atmospheric agents, the outer face of the samples shall be free from cracks, scratches, chipping and deformation, and the mean variation in transmission Δt = (T2 – T3)/T2 measured on the three samples according to the procedure described in Appendix 2 to this annex shall not exceed 0,020 (Δtm < 0,020).
A. PRESKUSI PLASTIČNIH MATERIALOV (LEČ ALI VZORCEV MATERIALA, KI SO BILI PREDLOŽENI SKLADNO Z ODSTAVKOM 2.2.4 TEGA PRAVILNIKA)
After the test of resistance to chemical agents, the samples shall not bear any traces of chemical staining likely to cause a variation of flux diffusion, whose mean variation Δd = (T5 – T4)/T2 measured on the three samples according to the procedure described in Appendix 2 to this annex shall not exceed 0,020 (Δdm < 0,020).
Vzorci
Resistance to light source radiation
Leče ali vzorci materiala
If necessary the following test shall be done:
Leče
Flat samples of each light transmitting plastic component of the system are exposed to the light of the light source.
Omejena fotometrija (odst.
The parameters such as angles and distances of those samples shall be the same as in the system.
2.1.2)
These samples shall have the same colour and surface treatment, if any, as the parts of the system.
Sprememba temperature (odst.
After 1500 hours of continuous exposure, the colorimetric specification of the transmitted light must be met with a new light source, and the surface of the samples shall be free of cracks, scratches, scaling or deformation.
2.1.1)
The UV-resistance testing of internal materials to light source radiation is not necessary if light sources according to Regulation No 37 and/or low-UV-type gas discharge light sources and/or low-UV-type LED modules are being applied or if provisions are taken, to shield the relevant system components from UV radiation, e.g. by glass filters.
Meritev prepustnosti svetlobe
Resistance to detergents and hydrocarbons
Meritev razpršenosti svetlobe
Resistance to detergents
Okoljski dejavniki (odst.
The outer face of three samples (lenses or samples of material) shall be heated to 50 °C ± 5 °C and then immersed for five minutes in a mixture maintained at 23 °C ± 5 °C and composed of 99 parts distilled water containing not more than 0,02 per cent impurities and one part alkylaryl sulphonate.
2.2.1)
At the end of the test, the samples shall be dried at 50 °C ± 5 °C.
Kemični dejavniki (odst.
The surface of the samples shall be cleaned with a moist cloth.
2.2.2)
After the above two tests have been performed successively, the mean value of the variation in transmission Δt = T2 – T3)/T2 measured on the three samples according to the procedure described in Appendix 2 to this annex shall not exceed 0,010 (Δtm ≤ 0,010).
Ogljikovodiki (odst.
Resistance to mechanical deterioration
2.3.2)
Mechanical deterioration method
Poškodbe (odst.
The outer face of the three new samples (lenses) shall be subjected to the uniform mechanical deterioration test by the method described in Appendix 3 to this annex.
2.4.1)
After this test, the variations:
Oprijem (odst.
In transmission : Δt = (T2 – T3)/T2
2.5)
And in diffusion : Δd = (T5 – T4)/T2
Odpornost proti sevanju svetlobnega vira (odst.
Shall be measured according to the procedure described in Appendix 2 in the area specified in paragraph 2.2.4.1.1 of this Regulation.
2.2.4)
The mean value of the three samples shall be such that:
B. PRESKUSI CELOTNIH SISTEMOV (PREDLOŽENIH V SKLADU Z ODSTAVKOM 2.2.3 TEGA PRAVILNIKA)
Test of adherence of coatings, if any
Celotni sistemi
Preparation of the sample
Št. vzorca
A surface of 20 mm × 20 mm in area of the coating of a lens shall be cut with a razor blade or a needle into a grid of squares approximately 2 mm × 2 mm.
Poškodbe (odst.
The pressure on the blade or needle shall be sufficient to cut at least the coating.
2.6.1.1)
Description of the test
Fotometrija (odst.
Use an adhesive tape with a force adhesion of 2 N/(cm of width) ± 20 per cent measured under the standardized conditions specified in Appendix 4 to this annex.
2.6.1.2)
This adhesive tape, which shall be at least 25 mm wide, shall be pressed for at least five minutes to the surface prepared as prescribed in paragraph 2.5.1 above.
Oprijem (odst.
Then the end of the adhesive tape shall be loaded in such a way that the force of adhesion to the surface considered is balanced by a force perpendicular to that surface.
2.6.2)
At this stage, the tape shall be torn off at a constant speed of 1,5 m/s ± 0,2 m/s.
Dodatek 2
There shall be no appreciable impairment of the gridded area.
METODA MERJENJA RAZPRŠENOSTI IN PREPUSTNOSTI SVETLOBE
Impairments at the intersections between squares or at the edges of the cuts shall be permitted, provided that the impaired area does not exceed 15 per cent of the gridded surface.
OPREMA (glej sliko 1)
Tests of the complete system incorporating a lens of plastic material
Svetlobni pramen kolimatorja K s polovično divergenco β/2 = 17,4 × 10– 4 rad se omeji z zaslonko Dτ z odprtino 6 mm, pri kateri je nameščen nosilec za vzorec.
Resistance to mechanical deterioration of the lens surface
Akromatična zbiralna leča L2, ki je korigirana za sferične aberacije, povezuje zaslonko Dτ s sprejemnikom R; premer leče L2 mora biti tak, da ne zaslanja svetlobe, ki se od vzorca razprši v stožcu s polovičnim vršnim kotom β/2 = 14 stopinj.
The lens of system sample No 1 shall be subjected to the test described in paragraph 2.4.1 above.
Obročasta zaslonka DD s kotoma αo/2 = 1° in αmax/2 = 12° je nameščena v goriščni ravnini slike leče L2.
After the test, the results of photometric measurements carried out on the system or part thereof in accordance with this Regulation shall not exceed by more than 30 per cent the maximum values prescribed at point B50L and not be more than 10 per cent below the minimum values prescribed at point 75R, if applicable.
Neprozorni srednji del zaslonke je potreben za zaslanjanje svetlobe, ki prihaja neposredno iz svetlobnega vira.
The lens of installation unit sample No 2 shall be subjected to the test described in paragraph 2.5 above.
Srednji del zaslonke se lahko odstrani iz svetlobnega pramena tako, da se vrne točno v svoj izhodiščni položaj.
VERIFICATION OF THE CONFORMITY OF PRODUCTION
Razdaljo L2 Dτ in goriščno razdaljo F2 leče L2 je treba izbrati tako, da slika Dτ v celoti pokrije sprejemnik R.
With regard to the materials used for the manufacture of lenses, the installation units of a series shall be recognized as complying with this Regulation if:
Za L2 se priporoča uporaba goriščne razdalje približno 80 mm.
After the test for resistance to chemical agents and the test for resistance to detergents and hydrocarbons, the outer face of the samples exhibits no cracks, chipping or deformation visible to the naked eye (see paragraphs 2.2.2, 2.3.1 and 2.3.2 of this annex);
Če se za začetni vpadni svetlobni tok vzame 1 enota, mora biti absolutna točnost odčitanja boljša od 0,001 enote.
After the test described in paragraph 2.6.1.1 above, the photometric values at the points of measurement considered in paragraph 2.6.1.2 are within the limits prescribed for conformity of production by this Regulation.
Optični sistem za merjenje sprememb razpršenosti in prepustnosti svetlobe
If the test results fail to satisfy the requirements, the tests shall be repeated on another sample of systems selected at random.
MERITVE
Appendix 1
Odčitati je treba naslednje vrednosti:
CHRONOLOGICAL ORDER OF APPROVAL TESTS
Odčitana vrednost
A. TESTS ON PLASTIC MATERIALS (LENSES OR SAMPLES OF MATERIAL SUPPLIED PURSUANT TO PARAGRAPH 2.2.4 OF THIS REGULATION)
Z vzorcem
Samples
S srednjim delom DD
Lenses or samples of material
Ustrezajoča velikost
Lenses
Vpadni svetlobni tok pri prvem odčitku
Limited photometry (para.
(pred preskusom)
2.1.2)
Svetlobni tok, ki ga je prepustil novi material na območju 24 stopinj
Temperature change (para.
Svetlobni tok, ki ga je prepustil preskušeni material na območju 24 stopinj
2.1.1)
Svetlobni tok, ki ga je razpršil novi material
Transmission measurement
Svetlobni tok, ki ga je razpršil preskušeni material
Diffusion measurement
Dodatek 3
Atmospheric agents (para.
METODA PRESKUSA S ŠKROPLJENJEM
2.2.1)
PRESKUSNA OPREMA
Chemical agents (para.
Škropilna pištola
2.2.2)
Uporabljena škropilna pištola mora imeti šobo s premerom 1,3 mm, ki omogoča pretok tekočine 0,24 ± 0,02 l/minuto pri tlaku obratovanja 6,0 bara – 0/+ 0,5 bara.
Detergents (para.
V teh pogojih uporabe je treba dobiti curek s premerom 170 ± 50 mm na površino, ki je izpostavljena poškodbam in od šobe oddaljena 380 ± 10 mm.
2.3.1)
Preskusna mešanica je sestavljena iz:
Hydrocarbons (para.
kremenčevega peska s trdoto 7 po Mohsovi lestvici z velikostjo zrn med 0 in 0,2 mm in približno normalno porazdelitvijo s kotnim faktorjem od 1,8 do 2;
2.3.2)
vode, katere trdota ni večja od 205 g/m3, za mešanico, ki vsebuje 25 g peska na 1 liter vode.
Deterioration (para.
PRESKUS
2.4.1)
Zunanjo površino leče žarometa je treba enkrat ali večkrat izpostaviti delovanju curka peska, dobljenega po zgoraj opisani metodi.
Adherence (para.
Pri tem je treba curek usmeriti skoraj pravokotno na površino, ki se preskuša.
2.5)
Nastajanje poškodb se preverja na enem ali več vzorcih stekla, nameščenih v bližini leč, ki se preskušajo.
Resistance to light source radiation (para. 2.2.4)
Mešanico je treba škropiti, dokler sprememba razpršene svetlobe na vzorcu ali vzorcih, izmerjena po metodi iz Dodatka 2, ne ustreza naslednji vrednosti: Δd = (T5 - T4)/T2 = 0,0250 ± 0,0025.
B. TESTS ON COMPLETE SYSTEMS OR PART(S) THEREOF (SUPPLIED PURSUANT TO PARAGRAPH 2.2.3 OF THIS REGULATION).
Za preverjanje enakomernosti poškodb na celotni površini, ki se preskuša, se lahko uporabi več referenčnih vzorcev.
Complete systems
Dodatek 4
Sample No
PRESKUS OPRIJEMA LEPILNEGA TRAKU
Deterioration (para.
NAMEN
2.6.1.1)
Po tej metodi se lahko pri normalnih pogojih določi linearna sila oprijema lepilnega traku na stekleni plošči.
Photometry (para.
NAČELO
2.6.1.2)
Merjenje sile, ki jo je treba uporabiti za snemanje lepilnega traku s steklene plošče pod kotom 90 stopinj.
Adherence (para.
PREDPISANI ATMOSFERSKI POGOJI
2.6.2)
Zrak mora imeti temperaturo 23 °C ± 5 °C in relativno vlažnost 65 ± 15 %.
Appendix 2
PRESKUŠANCI
METHOD OF MEASUREMENT OF THE DIFFUSION AND TRANSMISSION OF LIGHT
Pred preskusom se vzorčni kolut lepilnega traku 24 ur pripravlja pri predpisanih pogojih okolice (glej odstavek 3).
EQUIPMENT (see Figure 1 below)
Z vsakega koluta je treba preskusiti po pet preskušancev dolžine 400 mm.
The beam of a collimator K with a half divergence β/2 = 17,4 × 10 – 4 rad is limited by a diaphragm Dτ with an opening of 6 mm against which the sample stand is placed.
Ti preskušanci se vzamejo s koluta, ko so odstranjene prve tri plasti.
A convergent achromatic lens L2, corrected for spherical aberrations links the diaphragm Dτ with the receiver R; the diameter of the lens L2 shall be such that it does not diaphragm the light diffused by the sample in a cone with a half top angle of β/2 = 14 degrees.
POSTOPEK
An annular diaphragm DD, with angles αo/2 = 1 deg and αmax/2 = 12 degrees is placed in an image focal plane of the lens L2.
Preskus je treba opraviti pod pogoji okolice, kakor so določeni v odstavku 3.
The non-transparent central part of the diaphragm is necessary in order to eliminate the light arriving directly from the light source.
Pet preskušancev je treba sneti s koluta med radialnim odvijanjem lepilnega traku s hitrostjo približno 300 mm/s, nato pa jih je treba v 15 sekundah nanesti, kakor sledi:
It shall be possible to remove the central part of the diaphragm from the light beam in such a manner that it returns exactly to its original position.
Lepilni trak se nanaša na stekleno ploščo postopoma tako, da se s prstom rahlo drgne v vzdolžni smeri, vendar brez prekomernega pritiska, tako da med trakom in stekleno ploščo ni nobenega zračnega mehurčka.
The distance L2 Dτ and the focal length F2 of the lens L2 shall be so chosen that the image of Dτ completely covers the receiver R.
Vse skupaj se 10 minut pusti v predpisanih atmosferskih pogojih.
For L2 it is recommended to use a focal distance of about 80 mm.
Približno 25 mm preskušanca je treba odlepiti s plošče v ravnini, ki je pravokotna na os preskušanca.
When the initial incident flux is referred to 1 the absolute precision of each reading shall be better than 0,001.
Ploščo je treba pritrditi, prosti konec lepilnega traku pa prepogniti za 90° od plošče.
Optical set up for measurement of variations in diffusion and transmission
Vlečna sila mora delovati tako, da je ločilna črta med lepilnim trakom in ploščo pravokotna na to silo in na ploščo.
MEASUREMENTS
Lepilni trak je treba odstraniti s hitrostjo 300 mm/s ± 30 mm/s in zapisati uporabljeno silo.
The following readings shall be taken:
REZULTATI