Preparing for ASTM F1862 testing: from method to instrument setup

The TNG1044 and TNG1049 instruments are suitable for ASTM F1862 testing, as their specifications align with the required parameters for synthetic blood penetration evaluation.

Confirming the Method Code

Before selecting an instrument, it is essential to confirm that the test method code, ASTM F1862, is correctly referenced. This standard outlines the procedures for evaluating the resistance of face masks to synthetic blood penetration, which is critical for ensuring respiratory protection in healthcare and industrial environments. The TNG1044 and TNG1049 are designed to meet the requirements of this standard, ensuring accurate and repeatable results.

Identifying the Required Measuring Range

The ASTM F1862 standard specifies the conditions under which synthetic blood is sprayed onto a face mask to assess its protective capabilities. The TNG1044, for instance, has a blood spraying distance of (300 ± 10) mm, which matches the standard's requirement for consistent application of the test fluid. Additionally, the nozzle inner diameter of 0.84 mm ensures the correct flow rate and pressure for the synthetic blood, while the nozzle length of 12.7 mm supports uniform coverage across the test sample. These specifications are crucial for maintaining the integrity of the test and ensuring that the results are reliable and comparable.

Checking the Published Specification Table

To ensure the selected instrument is appropriate for ASTM F1862 testing, the published specification table should be reviewed thoroughly. The TNG1044 offers multiple spraying speeds—450 cm/s, 550 cm/s, and 635 cm/s—as well as varying spraying times of 0.80 s, 0.66 s, and 0.57 s. These options allow for flexibility in simulating different levels of exposure and stress on the mask material. The adjustable watching time of 10 seconds provides the necessary observation period to determine whether any penetration occurs. These features ensure that the test can be conducted in accordance with the standard, providing accurate and meaningful data.

Requesting a Quotation

Once the method code, measuring range, and specifications have been verified, the next step is to request a quotation. This should include the model number of the instrument, the specific test parameters required, and any additional accessories or software that may be necessary for compliance with ASTM F1862. By anchoring each step in the supplied instrument data, the procurement and setup process can be streamlined, ensuring that the selected equipment meets all the necessary criteria for accurate and standardized testing.

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).