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Smoke Density Chamber ASTM E662, BS 6401

The working principle of the NBS smoke density test chamber is to calculate the specific optical density by measuring the light transmittance of the smoke (in %) using the built-in optical system of the test chamber. The minimum light transmittance is usually used to calculate the maximum specific optical density Ds.
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Smoke Density Chamber ASTM E662, BS 6401
Smoke Density Chamber ASTM E662, BS 6401
Smoke Density Chamber ASTM E662, BS 6401
Smoke Density Chamber ASTM E662, BS 6401
  • GD-ISO5659

  • GOLD

Smoke Density Chamber ASTM E662, BS 6401


Description:

The working principle of the NBS smoke density test chamber is to calculate the specific optical density by measuring the light transmittance of the smoke (in %) using the built-in optical system of the test chamber. The minimum light transmittance is usually used to calculate the maximum specific optical density Ds.

The formula is: Dsmax=132Log10(100/Tmin).

Tmin is the minimum light transmittance during the test.


The NBS smoke density test chamber consists of the following components:

The test chamber, with internal dimensions of 914mm x 914mm x 610mm, has good corrosion resistance.

Built-in optical measurement system.

Radiant heat source.

Data acquisition system.

Operating software.


In the smoke density test, the sample is mounted horizontally/vertically in the test chamber and its upper surface is exposed to a radiant heat source of a specific irradiance (up to 50 kW/m²). The generated smoke is collected in the test chamber and the attenuation of the light beam passing through the smoke is measured by the built-in photometric measurement system in the test chamber. The data and results are collected and calculated by the software.


Main feature:

  • Integrated body and 19” analysis rack (Saving space).

  • 17” touch screen panel type PC for the whole control and automatic testing.

  • Air cylinder type movement to load sample or automatically open the up/down  vent(highly resistant to pollution from test).

  • Coating of the test chamber convenient in cleaning and resistant tochemicals.

  • Lock designed to close the chamber door at a time.

  • Indication of transmission rate and smoke density with improved accuracy.

  • Chamber preheat system to facilitate test with more accuracy.

  • Safety blow-out panel system to protect user when pressure is sharply increased during test.

  • Port, heated filter, and heated line to measure toxic gases.

  • Manometer gauge with increased accuracy by using the MFC (Mass Flow Controller) and DPT(Differential Pressure Transducer) enabling auto leakage test.

  • Portable water cooling system without need for waterworks and plumbing when using the Heat Fluxmeter (for ISO 5659).

  • Load cell with increased accuracy to measure mass loss rate in ISO 5659 test.

  • SB 2005 DAQ(Data Acquisition) Program to control the use of touch screen panel PC.

ISO 5659-2 Plastics NBS Smoke Density Tester Optical Density Test Apparatus (3)

ISO 5659-2 Plastics NBS Smoke Density Tester Optical Density Test Apparatus (1)

Test result:

  • Laboratory Information

  • User’s CI

  • Specimen Conditions

  • Time from start of test, t(s)

  • Transmission(%) and specific optical density, Ds

  • Maximum Ds and time to maximum Ds

  • Correction Ds

  • Current range setting and filter position

  • Current mass(g) for ISO 5659


Specification:

Size

1,600mm(w) × 820mm(D) × 2,150mm(H)

Power

220 V AC, 60 Hz, 15 A

Weight

about 350 kg

Exhaust

50 l/s

Utilities

Compressed Air, Propane Gas, Personal Computer, Dust Collector


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