10/ 2010
BENNING LUXMETER B
17
2. Main feature standards for field illuminance (lux) meters
The International Commission on Illumination (abbreviated as CIE from its
French title) is an organization devoted to international cooperation and
exchange of information between its member countries on all matters relating
to the science and art of lighting. In accordance with an agreement between
ISO (the International Organization for Standardization) and CIE, standards are
published as double logo standards by ISO. Standards produced by the CIE are
a concise documentation of data defining aspects of light and lighting, for which
international harmony requires a unique definition. CIE Standards are therefore
a primary source of internationally accepted and agreed data which can be
taken, essentially unaltered, into universal standard systems.
CIE 69
Methods of Characterizing Illuminance Meters and Luminance
Meters
The properties of photometers and photometer heads for the measurements of
illuminance and luminance are defined. Methods of calibration are given and
sources of errors are described.
BS 667
The requirements for field instruments (type F) meters for the
measurement of planar illuminance are specified in this standard.
The main definitions and requirements regarding the performance
of measurements and construction of measurement instrument are
also included.
DIN 5032 /7
Light Measurement Classifications for illuminance and brightness
measurement instruments
There are four classes of illuminance meters due to the German DIN 5032
standard: L, A, B and C. Requirements for type F (field instruments) meters for
the measurement of planar illuminance are specified in classes A, B and C.
In table 1 the maximum allowed error over the effective range is specified:
Parameter
DIN 5032 – 7
Class B
Matching to V(
λ
) function
6%
Ultraviolet response
2%
Infra-red response
2%
Cosine correction
3%
Non-linearity
2%
Fatigue
1%
Temperature change
1% / degree
K
Modulated light
0,5%
Table 1:
Accuracy of field illuminance meters
BENNING Luxmeter type B is Class B compliant.
