1、 Overview of Oxygen Index Tester

The instrument has a simple structure and is easy to operate. It can be used as a means of identifying the combustion performance of polymers, as well as a related research tool, in order to gain a better understanding of the combustion process of polymers. It is applicable to the test of combustion performance of plastics, rubber, foam and other materials, with accurate results and good reproducibility. It is a testing instrument for researching and producing flame-retardant materials.

2、 Technical parameters of oxygen index analyzer

1. Inner diameter of combustion cylinder: 100mm

2. Combustion cylinder height: 450mm

3. Flow meter accuracy: Level 2.5

4. Pressure gauge accuracy: Level 2.5

5. Pressure gauge resolution: 0.01MPa

6. Resolution of oxygen concentration indicator: 0.1%

7. Gas source: oxygen specified in GB3863, nitrogen specified in GB3864

8. Test environment: temperature 10-35 ℃, humidity 45-75%

9. Input pressure: 0.2-0.3MPa

10. Work pressure: 0.05-0.15MPa

11. Sample types: self-supporting materials and non self-supporting materials

12. Power supply: AC220V/50Hz

3、 Installation of Oxygen Index Tester

1. Unpack the instrument and place it flat on the workbench.

2. Connect the oxygen nitrogen mixed gas output end behind the control box to the pipe connector at the bottom of the host using the plastic reinforcement pipe in the random attachment, and tighten it with a pipe clamp. Attention: The nitrogen and oxygen inputs behind the control box correspond to the adjustment directions of the nitrogen and oxygen in front, respectively. The mixed gas output end is in the middle. 3. Install the oxygen and nitrogen steel cylinders and install the pressure reducing valve on the cylinders. Connect the nitrogen and oxygen connectors on the rear panel of the control box to the output end of the pressure reducing valve of the oxygen and nitrogen gas cylinders respectively using the plastic reinforcement tube in the random attachment, and clamp them tightly with a pipe clamp. The steel cylinder and pressure reducing valve shall be provided by the user.

4. Install the combustion drum on the base

5. Method for filling glass beads and replacing fixtures

6. Igniter is an ignition device specifically selected for ignition, which can adjust the length of the flame. Users can inflate or replace the randomly carried igniter after the gas is exhausted (lighter uses gas).

4、 Use of oxygen index analyzer

1. According to GB2406.2-2009, the mixed gas flow rate in the combustion chamber is 4 ± 1 cm/s. Based on this, the mixed gas flow rate is selected as 1.133m3/h (empirical value is 10.7-1.18 m3/h). The required flow rate can also be calculated according to special standards. The formula is: combustion cylinder cross-sectional area X flow rate (note unit conversion). Some standards, such as GB/T5544-1997, directly provide mixed gas flow rates, which can be adjusted according to this standard flow rate.

2. Select and make samples according to the required test sample standards, and use self-supporting or non self-supporting material sample clamps. Install them at the top of a height adjustable slide sleeve. If the height exceeds the standard requirements, the height adjustable slide sleeve can be removed and the sample clamp can be directly installed on the slide sleeve

3. The oxygen sensor for full adjustment has been calibrated at the factory, and users do not need to adjust this knob.

Precautions:

1. This equipment is an experimental testing device

Please do not use this device for purposes other than specified testing and materials.

The sample production should be precise and accurate, with a flat and smooth surface.

The flow regulation of oxygen and nitrogen should be appropriate, and the pressure gauge should be in the normal position. It is forbidden to use excessive air pressure to prevent damage to the equipment.

Flow meters and glass cylinders are fragile items, so be careful not to break them during experiments.

2. Please improve the installation environment

Please keep it at room temperature.

Places with low humidity. Places with less than 80% no condensation and low levels of dust and dirt.

3. Please install the test materials as required

Install the test materials as required, otherwise unexpected failures may occur.

4. When carrying out wiring and maintenance operations, please make sure to turn off the power

To prevent accidents and electric shock caused by the loss of control of the machine during the operation, please make sure to turn off the power before starting the operation.

5. Power supply

Please pay attention to the following matters regarding the power supply of this device.

In principle, the distribution method adopts single-phase 220V power supply.

Regarding power supply and power engineering, please consult with electrical engineering personnel or individuals with equivalent knowledge.

6. Power cord

Please make sure to use the power cord provided with the device. If any abnormalities are found in the power cord and power plug, please contact our company. Replace or guide the replacement with our company's service personnel.

7. Fuse

To prevent fires and damage to internal circuits, please do not use fuses other than those specified. When replacing fuses, please use fuses of the same model and shape as the original equipment.

8. Special Warning

Warning: Attention should be paid to the high level of danger posed by the applications or conditions being executed, which may result in personal injury or even death.

To prevent accidental injury or death, please be sure to observe carefully before moving and using the equipment before taking any action