IEC 61034-1-2013 pdf download.Measurement of smoke density of cables burning under defined conditions – Part 1: Test apparatus.
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
I EC 60695-4, Fire hazard testing — Part 4: Terminology concerning fire tests
lEG Guide 104:1997, The preparation of safety publications and the use of basic safety publications and group safety publications
ISO/lEG 13943:2000, Fire safety — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions in lEG 60695-4 apply, or it a term is not defined in IEC 60695-4 then the definition in ISO/IEC 13943 applies.
4 Details of test enclosure
The equipment shall comprise a cubic enclosure with inside dimensions of 3 000 mm ± 30 mm and constructed of a suitable material fixed on to a steel angle frame. One side shall have a door, with a glass inspection window. Transparent sealed windows (minimum size 100 mm x 100 mm) shall be provided on two opposite sides to permit the transmission of a beam of light from the horizontal photometric system, The distance from the floor to the centre of these windows shall be 2 150 mm ± 100 mm (see Figure 1 for plan view).
The walls of the enclosure shall include orifices at ground level (i.e. not greater than 100 mm above the level of the chamber floor) for the passage of cables, etc., and to permit the enclosure to be at atmospheric pressure.
No orifice shall be directly behind the fire source or on the same wall. A minimum of two orifices shall be provided and the total area of the orifices open during the test shall be 50 cm2 ± 10cm2.
5 Photometric system
5.1 The photometric system is illustrated in Figure 2. The light source and the receiver shall be placed externally in the centre of both windows in the two opposite walls of the cube without making physical contact. The light beam shall traverse the cube through the glass windows in the side walls.
5.2 The light source shall be a halogen lamp with a tungsten filament with a clear quartz bulb having the following characteristics:
nominal power: 100 W:
nominal voltage: 12 V d.c.:
nominal luminous flux: 2 000 Im to 3 000 Im;
nominal colour temperature: 2 800 K to 3 200 K.
The bulb shall be supplied with a voltage of 12,0 V ± 0,1 V (mean value). During the test, the voltage shall be stabilized to a range of ± 0,01 V (see A.2c) for additional guidance.) The lamp shall be mounted in a housing and the beam adjusted by a lens system to give an evenly illuminated circular area of 1.5 m ± 0,1 m diameter on the interior of the opposite wall.
5.3 The receptor photocell shall be of the selenium or silicon type with a spectral response matching the International Commission on Illumination (CIE) photopic observer (equivalent to the human eye). The photocell shall be mounted at the end of 150 mm ± 10 mm tube with a dust protection window at the other end. The inside of the tube shall be matt black to prevent reflections. The photocell shall be connected to a potentiometric recorder to produce a linear proportional output. The cell shall be resistance-loaded to operate in its linear range and the input impedance of the recorder shall be at least iO times greater than the load resistance of the cell which shall not exceed 100 c.
5.4 The photometric system shall be energized before the blank test. When stability has been attained, the zero and full scale reading of the recorder shall be adjusted for light on the detector corresponding to 0 % (absence of light) and 100 % luminous transmission.IEC 61034-1 pdf download.