ISO 5659-2, Nes 711, ASTM E662, Nepa 258 Nbs Smoke Density Test Chamber

Introduction

The main principle is to measure smoke density of cable or material produced under specific conditions of combustion or 713 radiation. The smoke will couse the beam attenuate when passes through the smoke, the light transmittance be use to calculate ratio of the optical density and smoke density.
The smoke density chamber is designed according to ISO 5659 standard. It has a conical radiant furnace, heat flux can be up 50 kW / m2, and laterally positioned sample, it also can test the sample mass loss rate. 
 

Structure of Chamber

Combustion System
1, The heating cone: Power 2600W, input temperature range of 0 ~ 1000 ºC, can be stable within ± 2 ºC within 50 minutes, providing irradiance 10KW / m²-50KW / m².
2, The use of mass flow controllers and differential pressure sensor can improve the accuracy of piezometers and automatic leak test.
3, Ignition with automatic ignition devices; flame length 30mm±5mm; in accordance with standards prescribed blue flame with a yellow tip.

Smoke density measurement system
1, Smoke density and temperature are digital display, viewing more convenient, more accurate values.
2, Photodetector assembly includes a photomultiplier, amplified filters, shutters, filters, neutral density filter, a lens, an optical window, and other components.
3, The light source is 6.5V incandescent light sources.
4, The installation of optical cartridge box at the top, light accepted as side-on photomultiplier, light transmission rate of 0.001% accuracy can be achieved.
5, Achromatic lens is provided with ASTM E662 Smoke density test equipment.
6, ISO 5659-2 Smoke Box adopts Japan imported Photomultiplier tubes.
7, High-gain low-noise amplifier control circuit.

Technical Specification
1, Light transmittance measurement range: 0 ~ 100%; Resolution is 0.00001%;
2, Accuracy of measurement is less than ± 2.5%;
3, 6.5 V incandescent light; 2200+100k color temperature incandescent lamp;
4, Optical system for transmittance as linear response, measuring at least accuracy + / - 3%;
5, Photomultiplier tube filled with partial data acquisition precision 0.5%;
6, Heater input temperature 0 ºC ~ 1000 ºC, accuracy of plus or minus 2 ºC;
7, Import K type armoured thermocouple accuracy of 0.1 ºC;
8, Mouth thermopile type heat flow meter range is 0 ~ 80 kw/m2; The thermopile type heat flow meter, heat meter accuracy is 1%, repeatability and 0.5%;
9, Propane gas flow meter range: 0 ~ 100 ml/min. Minimum pressure of 3.5 kPa plus or minus 1 kPa;
10, Air flow meter range: 0 ~ 1000 ml/min.
11, Fan provides the negative pressure in the cabinet at least 0.5 kPa;
12, Enclosure bear greater than the atmospheric pressure at least 1.5 kPa;
13, Water pressure gauge 1.5 kPa (150 mm water column);
14, Wall temperature measurement range: 0 ~ 100ºC±1ºC;
15, Window heater power 9 W;
16, Test the pressure inside the warehouse scope: < 1.5 kPa;
17, Radiation power range: 0 ~ 50 kW/m².