Fluorescent ultraviolet lamps used for tanning
IEC 61228-2020 pdf download.Fluorescent ultraviolet lamps used for tanning — Measurement and specification method
Lampes fluorescentes a ultraviolet utilisées pour le bronzage — Méthode de mesure et de specification.
Spectroradiometric measurements shall be made in accordance with the relevant recommendations of the CIE (International commission on Illumination), as given In CIE 63.
NOTE I Additional information about UV measurements is given in Annex B of PEC 62471:2006,
NOTE 2 Additional requirements for electrical measurements are given in Annex B of IEC 600811997, Annex B of
IEC 60081:1997/AMD2:2003, Annex B of IEC 60081:1997/AMD4:2010, Annex B of EC 60081:1997!AMD5:2013 and
Annex B of IEC 60901:1996. Annex B of IEC 60901:19961AMD2:2000. Annex B of lEG 60901:1996/AMD5:2011 and
Annex B of IEC 60901:1996/AMD6:2014.
5.2 Spectroradiometric measuring system
Lamps shall be measured in a spectroradiometer system to obtain the spectral irradiance. The system input optics shall have a cosine response to accurately measure irradiance.
The spectroradiometer shall have a bandwidth at a given wavelength not exceeding 2,5 nm and its wavelength resolution shall not be higher than 1 nm.
The distance between sensor and lamp axis, 1sensor’ shall be (25 ± 0,5) cm (see Figure 1).
NOTE A bandwidth at a given wavelength of 1 nm is preferred for greater measurement accuracy in cases where a rapid change of the spectral Irradiance occurs wtflln a smati bandwidth ar€a
6 Measurement and evaluation procedure
6.1 Measurement
6.1.1 General
The spectral irradiance shall be measured at intervals of 1 nm from 250 nm to 400 nm. Under the test conditions, the lamp power, current and voltage shall be recorded. The lamp shall be in stable electric and radiometric conditions.
6.1.2 Double capped fluorescent UV Lamps
Double capped UV fluorescent lamps shall be operated during measurement such that the lamp axis is at the same height as the centre of the entrance aperture of the sensor. The sensor shall be placed in front of the middle of the lamp (see Figure 1).
Reflector lamps shall be operated such that the non-reflecting side is directed towards the entrance aperture of the spectroradiometer. Lamps having a portion with no phosphor layer shall be positioned, such that the uncoated portion is directed centrally towards the entrance aperture of the spectroradiometer.
6.3 Ambient temperature adjustment
In order to arrive at the final total effective Liv irradiance values, the following correction factor
may have to be applied.
For lamps having the optimum UV irradiance at an ambient temperature other than 25 ocr a factor shall be applied to obtain the optimum UV Irradiance. as specified in Annex A.
6.4 Reflector angle
The reflector angle of fluorescent UV lamps shall be measured by using a reflector angle gauger in accordance with Annex D. The measurement of the reflector angle shall be performed in the middle of the lamp.
If the lamp to be measured is not covered by the gauge shown in Annex 0 (see Figure Dl), the measurement of the reflector angle shall be specified by the manufacturer or the responsible vendor.
6.5 Determination of the lamp maintenance code
Lamps shall be designated by a maintenance code in accordance with the ratio, r, of LIV radiance measured at 500 h divided by the UV radiance measured at 5 h.
For expression In the equivalency code IR, (see Clause 8), the UV Irradiance ratio, r, shall be multiplied by ten and the result rounded down to the next integer value.
7 Lamp specification
The following information shall be given for each lamp type in the manufacturer’s documentation:
a) lamp dimensions;
b) for reflector lamps, the reflector angle a, i.e. the angle subtended at the lamp axis by the reflector coating;
C) the ballast (operation frequency, nominal wattage) for which the lamp is designed;
NOTE Operation frequency can either be 50 HzJ60 Hz andlor HF.
d) the rated electrical characteristics:
— lamp wattage;IEC 61228-2020 pdf download.