Toxicity Index (CIT) Test Apparatus

1. Compliant standards

1.1 Complies with GB/T 17650.1-2021—Test on gases evolved during combustion of materials from cables Part 1: Determination of the amount of halogen acid gas

1.2 Complies with GB/T 17650.2-2021—Test on gases evolved during combustion of materials from cables Part 2: Determination of degree of acidity of gases by measuring pH and conductivity

1.2 It meets the table 6 acidity test of GB/T19666-2005 "General Rules for Flame Retardant and Fire Resistant Electric Wires and Cables or Optical Fiber Cables"

2. Scope of application

2.1 It is used to measure the total amount of halogen acid gas in low-halogen and halogen-free flame retardant cables and measure the acidity of the gas by measuring PH value and conductivity.

3. Main parameters

3.1 Tube furnace: The effective length of the heating chamber and the diameter of the tube are 600×ф58mm, and it is equipped with an adjustable electrical heating system. Heating power: 220V /10KW

3.2 Combustion tube:

3.2.1 Material: refractory tube made of silica, resistant to corrosive gases.

3.2.2 Specifications: The inner diameter is 40mm, the length extending from the inlet side of the tube furnace is 60~200mm, and the length extending from the outlet side is 60~100mm, leaving a gap for thermal expansion.

3.3 Burning boat:

3.3.1 Material: Fused quartz tube is used.

3.3.2 Specifications: length 92mm, width 27mm, depth 8.5mm.

3.3.3 The way to send in the combustion boat: it adopts bar magnet and platinum wire to pull in.

3.4 Gas collection: Three bottles are used: one of them is equipped with a magnetic stirrer and contains at least 220mL of sodium hydroxide solution.