Electric Cables Halogen Acid Gas Release Tester，Cable Halogen Acid Gas Release Test Machine

Application

This apparatus is widely used in laboratories and quality control departments involved in fire safety and material performance evaluation. Typical application scenarios include:

Testing halogen acid gas release characteristics of power cables, control cables, and communication cables

Evaluation of low-smoke halogen-free (LSHF) cable materials

Fire performance assessment of insulation and sheath compounds

Research and compliance testing for cable manufacturing enterprises

Type testing and routine inspection in third-party testing laboratories

Standards

The test apparatus is designed in accordance with the following international and national standards:

(1) GB/T 17650 – Determination of the Total Amount of Halogen Acid Gas Released During Combustion of Electric Cables

(2) IEC 60754-1 – Test on Gases Evolved During Combustion of Materials from Cables – Part 1: Determination of the Amount of Halogen Acid Gas

(3) IEC 60754-2 – Test on Gases Evolved During Combustion of Materials from Cables – Part 2: Determination of Acidity (by pH Measurement) and Conductivity

Parameters

Item	Specification
Tube Furnace Heating Length	600 mm
Maximum Heating Temperature	Up to 950 °C with thermal equilibrium
Temperature Measurement Range	0–1100 °C
Temperature Sensor	High-temperature K-type thermocouple
Temperature Accuracy	±0.1 °C
Quartz Tube	Heat-resistant quartz, thickness ≥ 2 mm
Carrier Gas	Compressed air
Equipment Dimensions	1500 (W) × 450 (D) × 400 (H) mm
Control Cabinet Dimensions	500 (W) × 400 (D) × 250 (H) mm
Power Supply	AC 220 V, 16 A
Weight	Approx. 80 kg

Features

Integrated structural design places the specimen guide tube and tube furnace on the same plane, minimizing positional deviation and improving glassware sealing performance.

Independent control cabinet enhances operational convenience and flexible equipment layout.

Tube furnace heating system adopts a temperature control module combined with a power regulator and PID control to ensure uniform and stable temperature rise.

Protective enclosure with perforated structure improves heat dissipation while protecting the furnace body.

Heat-resistant quartz tube is used for both gas transmission and specimen heating, with ground joints to enhance sealing performance.

Ceramic combustion boat is driven by a strong magnetic mechanism and transmission rod, ensuring stable and precise movement of specimens into the furnace core zone.

Lead screw transmission mechanism enables accurate positioning and smooth operation of the traction tube, reducing the risk of quartz tube damage caused by manual operation.

Imported precision rotameter controls carrier gas flow, combined with branded pressure gauge and pressure regulator to ensure stable airflow.

Dual filter columns filled with activated carbon and color-changing silica gel are used to purify and dry the carrier gas.

PLC and touchscreen control system enables intelligent temperature regulation and improved furnace temperature accuracy.

Built-in test programs for total halogen acid gas, conductivity, pH value, and quartz tube cleaning, with stored standard reference values.

Supplied with complete testing accessories including washing bottles, beakers, graduated cylinders, and magnetic stirrers.

High-quality pH meter and conductivity meter are included for accurate measurement of solution acidity and conductivity.

Accessories

(1) Heat-resistant quartz tube

(2) Ceramic combustion boat

(3) Precision rotameter

(4) Activated carbon filter column

(5) Color-changing silica gel filter column

(6) Glass washing bottles

(7) Beakers and graduated cylinders

(8) Magnetic stirrer

(9) pH meter

(10) Conductivity meter

Test Procedures

Prepare the cable specimen according to the relevant standard requirements and place it in the ceramic combustion boat.

Insert the combustion boat into the quartz tube and position it outside the furnace heating zone.

Set the target furnace temperature according to the selected standard (800 °C for IEC 60754-1 or 950 °C for IEC 60754-2).

Start the carrier gas flow and ensure stable airflow through the system.

Move the combustion boat into the furnace core zone using the magnetic transmission mechanism.

Collect the combustion gases through the absorption system.

Measure the total halogen acid gas volume, pH value, and electrical conductivity according to the selected test method.

Complete the test and perform the quartz tube cleaning procedure using the built-in program.

Maintenance Information

Regular inspection of the quartz tube, sealing joints, and gas pipelines is recommended to ensure reliable test results. The filter materials in the purification columns should be replaced periodically based on usage conditions. Temperature calibration of the thermocouple and verification of pH and conductivity meters should be conducted according to laboratory quality management requirements. After each test, the quartz tube and glassware should be thoroughly cleaned to avoid cross-contamination.

Conclusion

The GB/T 17650 Halogen Acid Gas Release Test Apparatus for Electric Cables provides a standardized and reliable solution for evaluating halogen acid gas emissions from cable materials under high-temperature conditions. With precise temperature control, stable gas flow regulation, and integrated measurement of halogen acid content, pH value, and conductivity, the system fully meets the requirements of GB/T 17650 and IEC 60754 standards, making it suitable for both research and routine compliance testing.

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