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Appendix
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7.3.1 Description of the equivalence keys for
UV fluorescent lamps
The equivalence key for UV fluorescent lamps for tanning that is represented
in detail in the IEC 61228 and that is marked on the lamp in a readable and
permanent manner, is described in the following.
The equivalence key has the following structure:
Wattage – Reflector type key – UV key.
The following reflector type key should be used for the equivalence key:
O with lamps without reflector;
B with lamps that have a wide reflecting angle
α
> 230°;
N with lamps that have a narrow reflecting angle
α
< 200°;
R with lamps that have the usual reflecting angle 200°
≤ α ≤
230°.
The following UV key should be used for the equivalence key:
UV key = X/Y;
X = the entire effective erythematic UV radiation strength across the range
250 nm to 400 nm;
Y = the relationship of the non-melanoma skin cancer effective UV radiation
strength
≤
320 nm and > 320 nm.
X is specified in mW/m² and rounded up to the next whole value, Y will be
rounded to the first decimal place after the point. The effective values apply
for a distance of 25 cm and under the conditions of an optimum UV radiation
strength.
Note
One example for an equivalence key is specified below:
y
100 W reflector lamp with a reflector angle of 220°
y
erythematic UV radiation strength
(250 nm to 400 nm) = 47 mW/m²
y
short wave NMSC effective UV radiation strength
(
≤
320 nm) = 61 mW/m²
y
long wave NMSC effective UV radiation strength
(> 320 nm) = 19 mW/m²
y
lamp equivalence key: 100–R–47/3.2