IEC 60601-2-50:2000/COR1:2001

IEC 60601-2-50(E)
(First edition – 2000)
Medical electrical equipment –

Part 2-50: Particular requirements for the safety

of infant phototherapy equipment

CORRIGENDUM 1
Page 15
*34 Ultraviolet radiation
Replace the existing text by the following new text:
This clause of the General Standard applies, except as follows:
Replacement:
Effective ultraviolet irradiance shall not exceed
–5 -4
for 180 nm < λ ≤ 400 nm      ≤1,0 × 10 mW/cm² (1,0 × 10 W/m²)
at any point of the EFFECTIVE SURFACE AREA.
Compliance with this requirement is checked by testing.
Page 22
Annex AA
(informative)
Guidance and rationale for particular subclauses
Addition to Item 34, page 23:
See also IRPA Guidelines on protection against non-ionizing radiation, edited by A.S.
Duchéne et al. Pergamon Press: Chapter 3: Guidelines on limits of exposure to ultraviolet
radiation of wavelengths between 180 nm and 400 nm (incoherent optical radiation), pages
42-52.
March 2001
In this publication the exposure limits (EL) were given for the near-ultraviolet UV-A spectral

region (315 nm – 400 nm). The total radiant exposure incident on the unprotected skin should

not exceed the values given in table AA.1.

Values for the relative spectral effectiveness, S , are given up to 400 nm to expand the action
λ
spectrum into the UV-A for determining the EL for skin exposure.

To determine the effective irradiance of a broadband source weighted against the peak of the

spectral effectiveness curve (270 nm), the following weighting formula should be used:

E = ∑ E × S × Δ
eff λ λ λ
where:
E = effective irradiance in W/m² normalized to a monochromatic source at 270 nm
eff
E = spectral irradiance from measurements in W/m²
λ
S = relative spectral effectiveness (unitless)
λ
Δ
= bandwidth in nanometers of the calculation or measurement intervals
λ
These ELs should be used as guides in the control of expo
...