IEC 61034 Lab Flammability Tester Smoke Density Testing Machine For Cable

IEC 61034 Smoke Density Measuring Device for Cable Optical Cable Burning Test Machine

1. Introduction

It meets the requirements of GB/T17651.1~2 and IEC61034-1~2 “Determination of Smoke Density of Burning Cables or Fiber Optic Cables under Specific Conditions” Part 1 “Test Equipment” and Part 2 “Test Procedures and Requirements”. Measurement of smoke density is an important aspect of evaluating the burning characteristics of cables or optical fiber cables, which is related to evacuation of personnel and judging the proximity to the fire. The instrument is mainly used to measure the smoke concentration and verify the smoke density of cables and fiber optic cables when they burn under specific conditions. Under flaming or flameless burning conditions, transmittance is used as a measurement method to compare the burning performance of different cables or fiber optic cables under specific conditions.

2. Features
The instrument involves three major specialized knowledge in mechanics, optics and electronics. It is a mechatronic product with reasonable structure, stable performance and easy operation; it adopts Windows XP operation interface, LabVIEW style and perfect safety mechanism. During the test, the measurement results can be displayed in real time, and the perfect curve (showing transmittance and time curve) can be drawn dynamically. Data can be permanently saved, read and printed, and reports can be printed directly.
Measurement software: Windows XP + VB6.0 operating interface, can test the main data: smoke optical density, relative optical density, smoke rate, maximum smoke rate, average smoke density and so on. Also has calibration, editing, testing, parameter adjustment and other operating interfaces. The program adopts automatic computer control, acquisition, recording and result settlement.

3. Principle
The smoke density optical measurement system for cable or optical cable burning under specific conditions consists of a light source, a silicon photocell, a light source receiver and a computer system. The light generated by the light source passes through a 3m×3m×3m smoke density laboratory and forms a uniform beam of light with a diameter of 1.5m±0.1m on the wall opposite the light source. The photocell installed in the center of the beam detects the intensity of the beam from the light source. When a large amount of smoke is generated in the combustion chamber due to the burning of cables or optical cables, the smoke absorbs part of the photoelectricity and the beam intensity of the silicon photocell is weakened. By processing the data through the computer system, the transmittance with a linear response relative to the initial transmittance can be calculated to be 100%.
The design of the combustion chamber adopts two ways for customers to choose: the first brick wall, our company recommends the design plan and sends professional engineers to guide the construction on site; the second is fixed on the angle iron bracket with suitable materials to form the entire cubic combustion chamber.

4. Equipment composition
The whole instrument is composed of closed test chamber, photometer measuring system, alcohol plate, combustion system, igniter, test box, cable bracket, thermometer table and smoke density testing software; The circuit is developed by single chip microcomputer with high technical content and stable performance. This instrument is suitable for all cables, and is widely used in production plants and scientific research and testing units of wire and cable industry. The test chamber is a test cube with a volume of 27m3.

5. Detailed technical parameters

1. Combustion chamber	inner size: 3M* 3M* 3M, a total of 27 cubic meters.Can be brick wall structure, also can be steel plate structure, by the customer's choice.
2. light measuring device	A. light source imported quartz halogen lamp: nominal power 100W, nominal voltage: 12V, nominal light return: 2000-3000LM
	B. Receptor: silicon photocell, light transmittance of 0% is no light through, light transmittance of 100% light without blocking completely through.
3. Standard ignition source	A. The ignition source is 1.0L alcohol
	B. Alcohol plate: stainless steel, bottom side 210*110mm, Top surface 240*140mm, height 80mm
4. Mixing of smoke	the use of desktop fans to make the smoke evenly distributed in the combustion chamber.
5. Blank test	burn the alcohol lamp to make the temperature of the combustion chamber reach 25±5ºC.
6. temperature measuring device	in the door surface from the ground height of 1.5m, A temperature sensor is installed 0.5M away from the wall.
7. including a set of transmittance measurement software, can output curves and reports.
8. including a computer (printer)
9. power	220V, 4KW.(The total power of the equipment should be indicated)
10. (smoke density) 0-924 six automatic shift gear
11. Measuring range	0.0001 -- 100%;
12. measuring accuracy	+ 3%;
13. Working voltage	200-240V 50HZ;
14. ambient temperature	room temperature - 40ºC
15. relative temperature	≤85%;
16. working environment	when the instrument is running, should avoid direct light, and there is no forced air flow phenomenon.

Other parameters and introduction
1. the front door is installed with a window and can block the inspection of the activities of the opaque screen
2. The bottom of the square box is provided with an automatic ignition device, and the top is provided with an internal pressure regulating device
3. light source: 12V incandescent lamp, optical wavelength of 400 ~ 750nm
4. Receptor: for silicon photocell, light transmittance 0% for no light through, light transmittance 100% light without blocking completely through.
5. Combustion system: composed of pressure regulator valve, filter, regulating valve flowmeter and burner.
6. Burner: composed of igniter and alcohol plate, placed in the center of the sample.