Scope of Application

【Operating Instructions】

This instrument is used to determine the volume percentage of oxygen required during the combustion of polymers. The Oxygen Index (OI) value is defined as the minimum oxygen concentration in an oxygen-nitrogen mixture required to just sustain the combustion of a specimen (after ignition) for a length of 50mm or a duration of 180s.

YS-JF-5 Intelligent Touch Screen Fully Automatic Oxygen Index Tester

【Scope of Application】This instrument is used to determine the volume percentage of oxygen required during the combustion of polymers. The Oxygen Index (OI) value is defined as the minimum oxygen concentration in an oxygen-nitrogen mixture required to just sustain the combustion of a specimen (after ignition) for a length of 50mm or a duration of 180s.

【Applicable Standard】

• GB/T 2406.2-2009

【Instrument Features】

• Full-Color Touch Screen Control: Simply set the oxygen concentration value on the screen. The program automatically adjusts to the oxygen balance and emits a beep sound for confirmation, eliminating the hassle of manual adjustment.

• High Precision Control: Utilizes a stepping proportional valve to greatly improve flow control accuracy.

• Closed-Loop Control: During testing, if the oxygen concentration drifts, the program automatically adjusts it back to the target value. This overcomes the limitation of traditional testers that cannot adjust concentration during the test, significantly improving testing precision.

【Technical Specifications】

• Sensor: Imported oxygen sensor with digital display; no manual calculation required. Range: 0 — 100%.

• Digital Resolution: ±0.1%

• Measurement Accuracy: Class 0.1

• Control: Touch screen program for automatic oxygen concentration adjustment.

• Calibration: One-touch accuracy calibration and one-touch concentration ratio adjustment.

• Stability Alert: Automatic audible alarm when oxygen concentration is stable.

• Data Management: Timing function included; capable of storing, querying, and clearing historical test data.

• Test Options: Selectable option for 50mm burn length criterion.

• Fault Diagnostics:

• Gas source fault prompt

• Oxygen sensor fault prompt

• Oxygen/Nitrogen reverse connection prompt

• Oxygen sensor aging prompt

• Standard Input: Standard oxygen concentration input available.

• Combustion Cylinder: Selectable diameter (two common specifications available).

• Flow Adjustment Range: 0 - 20 L/min (0 - 1200 L/h)

• Quartz Glass Cylinder: Two specifications optional (Inner Diameter ≥75mm or ≥85mm).

• Gas Velocity: 40 ± 2 mm/s inside the combustion cylinder.

• Overall Dimensions: 650mm × 400mm × 830mm

• Operating Environment: Ambient Temperature: Room Temp ～ 40℃; Relative Humidity: ≤70%

• Input Pressure: 0.25 - 0.3 MPa

• Working Pressure: Nitrogen 0.15 - 0.20 MPa; Oxygen 0.15 - 0.20 MPa

• Specimen Holders: Suitable for soft and rigid plastics, various building materials, textiles, fire doors, etc.

• Ignition System: Propane (Butane) ignition system. The ignition nozzle is a metal tube with a tail end nozzle of inner diameter Φ2±1mm, freely bendable. It can be inserted into the combustion cylinder to ignite the specimen.

• Flame Length: 16 ± 4mm (Adjustable from 5mm to 60mm).

• Gas Supply: Industrial Nitrogen and Oxygen, Purity >99%. (Note: Gas source and connectors are supplied by the user).

Tips:For the Oxygen Index Tester test, one cylinder each of industrial-grade Oxygen and Nitrogen (purity ≥98%) is required. Since these gases are classified as hazardous materials for transportation, they cannot be provided as accessories with the instrument and must be purchased from a local gas station. (Please purchase from a reputable local gas station to ensure gas purity).

• Power Supply: AC220 (+10%) V, 50Hz

• Max Power Consumption: 150W

• Specimen Holders:

• Self-Supporting Holder: Can be fixed on the axis of the combustion cylinder and clamp the specimen vertically.

• Non-Self-Supporting Holder: Can fix two vertical edges of the specimen on a frame (Optional / Applied to textiles and other soft materials that cannot self-support).