The Magic Principle Of The Glow Wire Tester
The Magic Principle Of The Glow Wire Tester
Glow wire tester is a commonly used material thermal performance testing instrument, which can measure the physical performance parameters of materials such as thermal expansion coefficient, thermal conductivity, thermal expansion, and thermal deformation temperature.So, how exactly does a Glow Wire Flammability Tester work?
Let’s reveal its magical principle to you below:
First, What is the Glow Wire Tester ?
Glow wire tester is an experimental instrument based on the principle of heat, which heats the nickel-chromium wire (U-shaped glow wire head) of Φ4mm with a large current to the specified temperature (300°C~1000°C) of the test.
The fire hazard of the finished electrical and electronic equipment is determined by the specified pressure (1.0N) level of the test sample for 30s, whether the test product and bedding are ignited or the ignition time.
After the test is completed, the ignition time, ignition time (Ti), flame extinguishing time (Te), and flammability index (GWFI) are recorded. It is suitable for scientific research, teaching and production.
Second, the working principle of the Glow Wire Tester
The working principle of the glow wire tester is to heat the sample with a resistance wire, and then measure the temperature curve of the sample over time to calculate the thermal performance parameters of the material.
1.Resistance Wires
The resistance wire is the core component of the glow wire tester, which is a metal wire with a diameter of less than 1.0mm, usually made of nickel-chromium alloy material.
During the test, the resistance wire is heated, and the curve of its temperature over time is called the “RTD curve”, which is the basis for calculating the thermal performance parameters.
2.Samples
The sample is another important component in the glow wire tester, and it is the material to be measured.
When the resistance wire is heated, the sample is also heated, and the curve of its temperature as a function of time is called the “sample temperature curve”, and by comparing the resistance wire curve and the sample curve, the ignition time (Ti), flame extinguishing time (Te), and flammability index (GWFI) of the material can be calculated.
Third, the application of Glow Wire Tester
Hot wire tester is widely used in scientific research, teaching and production fields, mainly used to measure the thermal performance parameters of various materials, including ignition time (Ti), flame extinction time (Te), flammability index (GWFI). Let’s wait.
It has important application value in material research, material design, new material development and so on.
Ending
Through the exploration of the glow wire tester, we learned that it is an experimental instrument based on thermal principles, which can be used to measure the thermal performance parameters of various materials.
In the future, with the continuous progress of science and technology, the hot wire tester will have a wider range of applications, and make greater contributions to the development of materials research and materials engineering.