ASTM F1862: which instrument fits and how to decide

The Face Mask Synthetic Blood Penetration Tester (TNG1044) and Synthetic Blood Penetration Tester (TNG1049) are suitable for testing in accordance with ASTM F1862, as their specifications align with the required parameters for synthetic blood penetration assessment.

Matching Specifications to ASTM F1862 Requirements

ASTM F1862 outlines the procedures for evaluating the resistance of face masks to synthetic blood penetration. For compliance testing, the testing instrument must replicate the conditions described in the standard, including the spraying distance, nozzle dimensions, and spraying speed. The Face Mask Synthetic Blood Penetration Tester (TNG1044) is specifically designed for this purpose. It features a blood spraying distance of (300 ± 10) mm, which matches the standard's requirement for simulating realistic blood spray scenarios. This specification ensures that the test conditions are consistent with real-world exposure, allowing for accurate evaluation of mask performance.

The nozzle inner diameter of 0.84 mm and nozzle length of 12.7 mm are also critical parameters. These dimensions ensure that the synthetic blood is delivered in a manner that closely mimics the behavior of actual blood under pressure. The spraying speed options of 450 cm/s, 550 cm/s, and 635 cm/s provide flexibility in testing different levels of fluid impact, which is essential for assessing the mask's ability to resist penetration under varying conditions. The spraying time of 0.80 s, 0.66 s, and 0.57 s further supports the standard by allowing for precise control over the duration of exposure, ensuring that the test results are reliable and repeatable.

Instrument Capabilities and Test Reproducibility

The Face Mask Synthetic Blood Penetration Tester (TNG1044) is equipped with a watching time of 10 seconds, which is adjustable. This feature allows operators to observe the mask's performance during the test, ensuring that any signs of penetration are captured accurately. The ability to adjust the watching time is crucial for maintaining test consistency and ensuring that the results are not influenced by external factors.

The Synthetic Blood Penetration Tester (TNG1049) is another model that supports testing under ASTM F1862. While it may not have all the detailed specifications listed for TNG1044, it is designed to meet the general requirements of the standard. Its compatibility with the necessary test parameters ensures that it can be used effectively for assessing the performance of various protective equipment.

Ensuring Compliance and Test Accuracy

Selecting the correct instrument is vital for ensuring compliance with ASTM F1862. The Face Mask Synthetic Blood Penetration Tester (TNG1044) and Synthetic Blood Penetration Tester (TNG1049) are both capable of delivering accurate and reliable test results. Their specifications, such as the spraying distance, nozzle dimensions, and spraying speed, are directly aligned with the standard's requirements. By using these instruments, laboratories can ensure that their testing procedures are both compliant and effective, providing valuable data for the evaluation of protective equipment.

Instrument models referenced

• TNG1044 Face Mask Synthetic Blood Penetration Tester (Air / Water / Vapour Permeability Testing). Published specifications include Blood spraying distance: (300 ± 10) mm; Nozzle inner diameter: 0.84 mm; Nozzle length: 12.7 mm.
• TNG1049 Synthetic Blood Penetration Tester (Air / Water / Vapour Permeability Testing).