GB/T 19666 Toxicity Index Tester | ASTM ISO Testing Machine

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The ASTM E1678 Combustion smoke toxicity tester is used for smoke toxicity testing in accordance with multiple international and regional standards. Typical application scenarios include:

Flame-retardant and fire-resistant power cables

Railway rolling stock cables and signal cables

Optical fiber cables and communication cables

Polymer insulation and sheath materials

Halogen-containing and halogen-free cable compounds

The instrument supports both absorption-liquid analysis and gas bag collection methods, allowing flexible downstream analysis depending on the test standard and laboratory requirements.

Standards

The system complies with the following standards and test methods:

(1) GB/T 19666 – General Rules for Flame-Retardant and Fire-Resistant Wires, Cables or Optical Cables

(2) EN 50305 – Railway Applications – Test Methods for Fire Behaviour of Electric Cables

(3) BS 6853 Annex B – Code of Practice for Fire Precautions in the Design and Construction of Passenger Carrying Trains

(4) ISO 19700 – Controlled Equivalence Ratio Method for the Determination of Toxic Product Yields in Fire Effluents (Steady-State Tube Furnace Method)

(5)ASTM E1678

(6)NFPA 269

Parameters

Item	Specification
Tube furnace heating length	600 mm
Temperature range	0–1100 °C
Temperature accuracy	±0.1 °C
Quartz tube	Heat-resistant quartz, thickness ≥ 2 mm
SO₂ measurement range	0–1000 ppm
SO₂ resolution	1 ppm
SO₂ accuracy	±30 ppm
NOₓ measurement range	0–3000 ppm
NOₓ resolution	1 ppm
NOₓ accuracy	±30 ppm
Gas sampling bag	PTFE-coated, 80 L capacity, with imported manual sampler
CO measurement range	0–10 %
CO resolution	0.01 %
CO accuracy	Absolute ±0.1 % or relative ±3 %
CO₂ measurement range	0–20 %
CO₂ resolution	0.01 %
CO₂ accuracy	Absolute ±0.2 % or relative ±3 %
Spectral analysis device	Spectrometer at 500 nm wavelength, membrane thickness 10 mm
Absorption solution	0.1 N NaOH
Titration reagents	Picric acid aqueous solution (3 g/dm³) and sodium carbonate aqueous solution (50 g/dm³)

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