GB/T5454 Oxygen Index Tester

1、 Instrument Overview:

GB/T5454 Oxygen Index TesterCan test the lowest concentration of oxygen required for the combustion of samples of interior decoration materials for electric bicycles. The oxygen index is an important reference value for measuring the flame retardant properties of materials. The oxygen index refers to the minimum oxygen concentration (expressed as a percentage) required to maintain continuous combustion when a material (specimen) of a certain size is loaded into a testing device, a mixture of oxygen and nitrogen is introduced under specified conditions, and the specimen is ignited with an igniter. This tester is an imported paramagnetic oxygen concentration sensor with accurate measurement, long lifespan, low error rate, and high reliability.

2、 Compliant with standards:
GB17761-2024 "Safety Technical Specification for Electric Bicycles";

GB/T 5454-1997 "Test for Burning Performance of Textiles - Oxygen Index Method";

GB/T 2406.2-2009 "Determination of Combustion Behavior of Plastics by Oxygen Index Method Part 2: Room Temperature Test"

GB38262-2019 "Combustion Characteristics of Interior Materials for Passenger Cars";

IIIGB/T5454 Oxygen Index TesterInstrument features:

Full color touch screen control, simply set the oxygen concentration value on the touch screen, and the program will automatically adjust to the oxygen concentration balance and emit a beep sound prompt, eliminating the trouble of manually adjusting the oxygen concentration;

The step proportional valve greatly improves the control accuracy of flow rate. With closed-loop control, the oxygen concentration drift program automatically adjusts to the target value during the test, which avoids the disadvantage that the traditional oxygen index tester cannot adjust the oxygen concentration during the test, and greatly improves the test accuracy.

4、 Main technical parameters

Using imported oxygen sensors, the digital display of oxygen concentration does not require calculation, with higher accuracy and a range of 0-100%.

Digital resolution: ± 0.1%

Measurement accuracy: 0.1 level

Touch screen setting program automatically adjusts oxygen concentration

One click calibration accuracy

One click concentration ratio

Oxygen concentration stable automatic prompt alarm sound

Equipped with timing function

Can store experimental data

Can query historical data

Can clear historical data

Can choose whether to burn 50mm or not

Gas source fault prompt

Oxygen sensor fault prompt

Oxygen and nitrogen misconnection prompt

Oxygen sensor aging prompt

Standard oxygen concentration input

Can set the diameter of the combustion cylinder (two commonly used specifications are optional)

Flow regulation range: 0-20L/min (0-1200L/h)

Quartz glass tube: Choose one of two specifications (inner diameter ≥ 75mm or inner diameter ≥ 85mm)

Gas flow velocity inside the combustion cylinder: 40mm ± 2mm/s

Overall dimensions of the machine: 650mm × 400 × 830mm

Experimental environment: ambient temperature: room temperature~40 ℃; Relative humidity: ≤ 70%;

Input pressure: 0.25-0.3MPa

Working pressure: Nitrogen 0.15-0.20Mpa, Oxygen 0.15-0.20Mpa

The sample holder can be used for soft and hard plastics, various building materials, textiles, fire doors, etc

The propane (butane) ignition system has an ignition nozzle made of a metal tube with an inner diameter of Φ 2 ± 1mm at the tail end, which can be freely bent. Can be inserted into the combustion cylinder to ignite the sample, flame length: 16 ± 4mm, size 5mm-60mm can be freely adjusted,

Gas: Industrial nitrogen, oxygen, purity>99%; (Note: The gas source and connection head shall be provided by the user)

Tips: During the oxygen index tester test, one bottle of industrial grade oxygen/nitrogen gas with a minimum of 98% is required as the gas source. As these gases are high-risk transportation goods, they cannot be provided as accessories for the oxygen index tester and can only be purchased at the user's local gas station. (To ensure the purity of the gas, please purchase it at a local regular gas station)

Power requirement: AC220 (+10%) V, 50HZ

Maximum power consumption: 150W

Self supporting material sample clamp: can be fixed at the axis position of the combustion cylinder and can vertically clamp the sample

Optional: Non self-supporting material sample clamp: capable of fixing both vertical edges of the sample to the frame at the same time (applied to soft non self-supporting materials such as textiles)

Attention: Oxygen sensor

1. Introduction to oxygen sensor: In the experiment of oxygen index testing, the function of oxygen sensor is to convert the chemical signal of combustion into electronic signal and display it in front of the operator. A sensor is like a battery, and it consumes energy every time it is tested. The higher the user's frequency of use or the higher the oxygen index value of the test material, the higher the consumption of the oxygen sensor.

2. Maintenance of oxygen sensors: To eliminate normal wear and tear, the following two points in maintenance and upkeep can help extend the service life of oxygen sensors:

If the equipment does not require testing for a long time, the oxygen sensor can be removed and sealed at a lower temperature to isolate oxygen storage. A simple operation method is to protect it with cling film and place it in the refrigerator compartment.

2. If the equipment is used relatively frequently (such as every three to four days), at the end of the day's test, the oxygen cylinder can be turned off first and then the nitrogen cylinder can be turned off after one or two minutes, allowing nitrogen to fill other mixing devices to reduce the ineffective reaction between the oxygen sensor and oxygen.

5、 Installation condition table: User provided