Introduction:
The testing tool known as the 3 Meter Smoke Density Tester measures the amount of smoke produced when a cable or optical cable is laid horizontally and burns under a certain fire resource under the proper conditions (3m3 chamber required by IEC61034). The value of light source penetration through the smoke produced when the cable is exposed to the designated standard fire source (ethanol 901%, methanol 41%, and distilled water 61%) 1L0.01L is crucial for measuring the smoke generation. P)
Standard:
IEC 61034 - 1 & 2
- Measurement of Smoke density of cables burning under defined condition
- part 1 : Test apparatus
- part 2 : Test procedure and requirements
Smoke Density Test in accordance with IEC 61034-1 & IEC 61034-2
IEC 61034-1:2005 I EN 61034-1:2005 I BS EN 61034-1:2005 1 DIN EN 61034-1:2006 I VDE 0482-1034-1:2006 Measurement of smoke density of cables burning under defined conditions. Part 1: Test apparatus IEC 61034-2:2005 I EN 61034-2:2005 I BS EN 61034-2:2005 1 DIN EN 61034-2:2006 I VDE 0482-1034-2:2006 1 CEI EN 61034-2:2006 (CEI 20-37/3-1) Measurement of smoke density of cables burning under defined conditions. Part 2: Test procedure and requirements. The standard specifies a method of measurement of smoke density of cables. Pant 1 specifies the test apparatus and Part 2 specifes the test procedure. The test is usually performed inside a chamber of 3m x3m x3m and the test is sometimes described as 3 metre cube test. The test is performed by monitoring the tranmittance reduction of a white light beam, running from one side of the chamber to the other, at a set height, thus monitoring the build up of smoke inside the chamber. The minimum percentage of light transmittance is often used to determine if the cable has passed or failed the test，often a minimum light transmittance of 60% is applied in order to classify a cable as low smoke.
BS 6853
- Code of practice for fire precautions in design and construction of passenger carrying trains
BS 6853 is the code of practice for fire safety measures in passenger train design and construction.
This British Standard is a code of practice that consists of suggestions and guidance. It shouldn't be cited as if it were a specification, and assertions of conformance should be verified carefully to make sure they aren't deceptive.
According to the British Standard's Introduction, the goal of the BS 6853 standard is to guarantee passenger safety in the case of a fire on or near a vehicle or vehicles that make up a passenger-carrying railway. A variety of interrelated procedures, such as those below, are necessary to provide fire safety in this setting:
emergency lighting and way-guiding systems, manual or automatic fire suppression systems, escape route or exit door widths, places of safety, occupancy levels, regular supervision, staff management of an incident (including staff training), control of materials and contents, ventilation, compartmentation, and fire resistance are all things to consider.
This standard, which also offers some guidance on various other topics, is naturally focused on the characteristics and fire performance of the construction and materials that make up the train. However, the engineer must be aware that all of the aforementioned safety precautions might need to be incorporated into the train's fire safety design.
NOTE: BS EN 45545 -2 Railway applications took the role of BS 6853. safety from fire on railroad wagons.
Requirements for fire behaviour of materials and components.
Feature:
1. The inside dimensions of the chamber are 3000 mm x 30 mm, and it is designed as a cubic enclosure with an adequate fixed iron frame angle.
2. It is set up with a door with test glass windows and sealed transparent windows (minimum 100 mm by 100 mm) on both faces of the opposite side that allow light to pass through.
3. Designed to keep the enclosure out of direct sunlight and extreme weather changes.
4. To prevent physical contact, the Photocell and Light Source are placed in the center of both windows on the opposite side of the wall.
5. A bulb is put to offer constant illumination.
6. To automatically calibrate the light transmissivity, two types of automatic filter systems (Carrusel) are installed.
7. A photocell is used to evaluate how much light is reduced by smoke.
8. The equipment has been created to fit different types of filters in the Light Source in order to check the radiation intensity in accordance with the measurement of light change by self-emission.
9. A support system that enables the separate installation of a photocell and a light source in the exterior wall.
10. The Light Source is a halogen light with a tungsten filament and a clear crystal lamp.
11. The average values for power, voltage, and light velocity are 100W, DC12v, 2000–3000 lm, and 2800–3200K, respectively.
12. The International Commission on Illumination's Photopic Observer (akin to a human eye) and the Receptor Photocell's spectrum reaction are selenium- or silicone-type devices (CIE).
13. To quickly match the standard temperature (25°C 5°C) in the initial test, a heating system is installed within the cube.
14. We use an auto ignition technology to ensure the security and convenience of the tester.
Test Result:
- Flameout time(min)
- Time to max Ao
- Min light transmittance (%)
- Add photo feature of carbonization area
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