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Glow wire testing machine

A glow-wire tester is a device used to simulate the heat resistance of materials exposed to a heat source (such as electrical components). Its operating principle is that an electric wire is heated to a predetermined temperature by an electric current. A robotic arm or manual force is used to press the glow-wire into the test sample to observe the material’s behavior under high temperature. This process simulates the potential reactions that materials might experience when exposed to high-temperature heat sources in real environments, such as burning, dripping, and ignition, thereby assessing the material’s safety.

Glow-wire Tester Operation Procedure

A complete glow-wire test typically involves the following steps:

1. Preparation: Select appropriate test conditions (such as glow-wire temperature, contact time, and backing material) according to the standard. Mount the test sample on the test bench to ensure the test environment meets standard requirements.

2. Preheating: Start the tester and allow the glow-wire to heat to the desired temperature and maintain a stable temperature. During this process, closely monitor the thermometer to ensure the required temperature is reached.

3. Contact Test: Place the glow-wire, which has reached the desired temperature, vertically on the sample surface for the specified contact time. Observe the sample’s reaction, including whether it ignites or continues to burn.

4. Observation and Recording: Carefully observe and record the sample’s combustion during and after contact. This includes information such as the appearance and extinction of flames, burning time, and dripping. This data will serve as an important basis for evaluating the sample’s flame retardancy.

5. Result determination: Compare the observed results with the determination criteria according to the standard to determine the sample’s flame retardancy level or whether it passes the test. For samples that fail the test, further analysis of the reasons and implementation of appropriate improvement measures are required.

Product Features

1. Utilizing a single-chip microcomputer (MCU) with touchscreen control and a high-precision temperature gauge, the electronic control system addresses the limitations of PLC systems in digital-to-analog conversion accuracy while also improving anti-interference capabilities. Microcomputer control offers greater precision.

2. Start, timing, ventilation, lighting, and heating are all controlled on the touchscreen. After a test cycle is completed, the device automatically saves the data; simply edit the saved name. All saved data is available in the historical data viewer.

3. 7-inch color touchscreen

4. Intelligent 7mm limit adjustment

5. The fixture accommodates specimens of various shapes and sizes.

6. Flexible X and Z movement facilitates specimen positioning.

7. One-touch operation allows for the entire test process to be completed with a single button press, eliminating the need for complex button switching.

8. The specimen trolley is fully enclosed and will not tip over.

9. Equipped with a flame height gauge for convenient flame height monitoring.

10. Overtemperature protection

Maintenance

1. Regularly perform maintenance on the instrument and check the operation of the relevant adjustment keys, keeping records.

2. Use the thermocouple only at the standard experimental temperature. After calibration, mark the ammeter for future use. Once the temperature drops to room temperature, carefully remove the thermocouple from the glow-wire and begin the experiment.

3. The glow-wire should not be operated at high temperatures for extended periods to avoid shortening the thermocouple’s lifespan. After each use, reduce the current and disconnect the power supply.

4. If maintenance is required, especially when replacing the glow-wire, be sure to re-tighten any screws that have been moved. Otherwise, poor contact may affect the current circuit and cause high interface temperatures. After replacing parts, tighten all screws.

8. The glow-wire tester has an over-temperature protection function. When the set temperature is reached, the heating circuit is automatically shut off. Therefore, the preset temperature must not be lower than the normal operating temperature, otherwise it will not function properly.