3 Metre Cube Smoke Density Apparatus

Compliance

IEC 61034, BS 6853, BS 6724, BS 7622

The 3 Metre Cube Smoke Density Apparatus, in accordance with IEC 61034 or BS 6853, provides a test method for measuring the density of smoke generated from building material or cable burning under a defined fire source.

During the test, when smoke is generated, the optical transmittance is continuously changed by blocking the light path through the smoke, resulting in a minimum transmission value and a test time to reach the minimum transmission.

3 Metre Cube in Intertek

The 3 Metre Cube Smoke Density Apparatus consists of:

  • The internal dimensions of the test chamber shall be 3000mm*3000mm*3000mm, with a total internal volume of 27 cubic metres.

  • The test chamber shall be equipped with a door and observation window to allow the user to observe the state of affairs in the combustion chamber.

  • The chamber shall be equipped with several ventilation holes near the floor to ensure a balanced atmospheric pressure inside and outside the chamber.

  • On the left and right side walls, transparent glass panels are installed, with light sources and optical receivers on each side.

  • Provides a floor-mounted fan to evenly agitate the smoke in the combustion chamber.

  • Provides an exhaust fan on top of the chamber to remove the smoke generated by the test.

  • Provides a combustion test stand and a stainless steel alcohol tray.

  • The light source is an imported light source, it is controlled by a constant current source, has higher stability. Features of the light source:

  • The light source, controlled by a constant current source, provides more stable and reliable data compared to the constant voltage mode.

  • Automatically obtain the optical of the gear, with an accuracy of 0.01%.

  • Matching error: F1 not more than 4%, with a linear accuracy of 1%

  • Light source receiving for imported silicon photocell, equipped with cosine calibration device as well as color filter, by which measure there can be a higher human eye matching.

  • A high-speed data acquisition system, integrating data acquisition, amplification, filtering, conversion, and recording.

  • Provides standard operation software.