Instructions

HD2402 - 6 - V1.3
(a)
t
0
eff
H =
∫∫
=λ nm400
=λ nm180
tdd)(S)t,(E
...
λ
λλλ
(H
eff
is only relevant in the range 180 to 400 nm)
(b)
H
UVA
=
t
0
λ = 400 nm
λ = 315 nm
(λ, t)
.
dλ
.
dt
∫∫
E
λ
(H
UVA
is only relevant in the range 315 to 400 nm)
(c), (d)
L
B
= L
λ
(λ)
.
B(λ)
.
dλ
λ = 700 nm
λ = 300 nm
∫
(L
B
is only relevant in the range 300 to 700 nm)
(e), (f)
∫
700 nm
B
λ
d)λ(B)λ
λ
(E
E
=λ
= 300 nmλ
..
=
(E
B
is only relevant in the range 300 to 700 nm)
(g) to (l)
L
R
= L
λ
R
d
λ
.
(λ)
λ
2
λ
1
∫
.
(λ)
(See Table 1.1 for appropriate values of λ
1
and λ
2
)
(m), (n)
∫
⋅=
=λ
=λ
λ
nm 3000
nm 780
IR
dλ)(λ EE
(E
IR
is only relevant in the range 780 to 3 000 nm)
(o)
∫∫
⋅⋅=
=λ
=λ
λ
t
0
nm 3000
nm 380
skin
dtdλ)t,(λ EH
(H
skin
is only relevant in the range 380 to 3 000 nm)
Table 1: formulas for the calculation of limit values
Where :
E
λ
(λ,t),
E
λ
Spectral irradiance or spectral power density: the radiant power incident per
unit area upon a surface, expressed in watts per square meter per nanome-
ter [W/(m
2
nm)]; E
l
(λ,t) and E
λ
values come from measurements or can be
supplied by the manufacturer of the equipment;
E
eff
Effective irradiance: calculated irradiance within the UV wavelength range
180 to 400 nm, spectrally weighted by S (λ), expressed in watts
p
er s
q
uare
meter [W/m
2
];
H Radiant exposure: the time integral of the irradiance, ex
p
ressed in
j
oule
p
er
square meter [J/m
2
];
H
ef
f Effective radiant exposure: spectral weighting by S (λ) radiant exposure,
expressed in joule per square meter [J/m
2
];
E
UVA
Total irradiance (UVA): calculated irradiance within the UVA wavelength
range 315 to 400 nm, expressed in watts per square meter [W/m
2
];
H
UVA
Radiant exposure: the time and wavelength integral or sum of the irradiance
within the UVA wavelength ran
g
e 315 to 400 nm, ex
p
ressed in
j
oule
p
er
square meter [J/m
2
];
S (λ) Spectral weighting taking into account the wavelength de
p
endence of the
health effects of UV radiation on eye and skin [dimensionless];
t, Δt Time, duration of the exposure, expressed in seconds [s];
λ Wavelength, expressed in nanometers [nm];
Δλ Bandwidth, expressed in nanometers [nm], of calculation or measurement
intervals;
L
λ
(λ),
L
λ
Spectral radiance of the source, expressed in watts per square meter
p
er
steradian per nanometer [W/(m
2
sr nm)];