Il tester di resistenza al flusso d'aria della maschera ISO9237 utilizza il metodo della pressione differenziale
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Descrizione
ISO9237 Mask Airflow Resistance Tester Use Differential Pressure Method
introduzione
The computer breathability tester adopts the latest technology and the most common testing method, which is ideal for testing the breathability of all kinds of masks, pelle, stoffa, tessuto, carta, cardboard or other flaky objects.This instrument is a fully integrated and automated instrument.
Standard: yy0469-2011 medical surgical mask, YY/T 0699-2013 disposable medical mask
BSEN 14683:2019 ISO9237, GB/T458, iso5636/2, QB/T1667, GB/T22819, GB/T23227, ISO2965, YC/T172, GB/T12655, eccetera.
Il tester di resistenza al flusso d'aria della maschera ISO9237 utilizza il metodo della pressione differenziale
Principle of respirator resistance test:
The gas flow rate was adjusted to 8L/min for the test, the diameter of the sample test area was 25mm, and the experimental area was 4.9cm. The pressure difference was calculated, and the result was reported as the pressure difference per square centimeter.
ISO9237 Mask Airflow Resistance Tester Use Differential Pressure Method
Testing principle of fabric permeability:
Based on the principle design of differential pressure method, the preprocessed sample is placed between the upper and lower measuring surfaces, and a constant differential pressure is formed on both sides of the sample. Under the effect of differential pressure, the gas flows from the high-pressure side to the low-pressure side through the sample. The permeability of the sample is calculated according to the area, differential pressure and flow through the sample.Or a constant airflow is formed on both sides of the sample, the pressure difference between the two sides of the sample is recorded, and the permeability of the sample is calculated.
ISO9237 Mask Airflow Resistance Tester Use Differential Pressure Method
Specifica tecnica
| Intervallo di misura | 0~200 (Pa/ cm²) 0～400L/dm²/min |
| Unit | Pa/ cm² Pa L/dm²/min μm/(Pa•s) mm/s m/s |
| Precisione | 0.01 (Pa/ cm²) 0.1papà 0.01 L/dm²/min |
| Errore | <1% |
| Measure error | 4.9cm² |
| Test airflow（Mask） | 8l/min |
| Test pressure difference range | 0-2000papà |
| Peso | 25kg |
| Misurare | 420×340×480mm |
ISO9237 Mask Airflow Resistance Tester Use Differential Pressure Method
Principio di prova:
Based on the principle design of differential pressure method, the preprocessed sample is placed between the upper and lower measuring surfaces, and a constant differential pressure is formed on both sides of the sample. Under the effect of differential pressure, the gas flows from the high-pressure side to the low-pressure side through the sample. The permeability of the sample is calculated according to the area, differential pressure and flow through the sample.Or a constant airflow is formed on both sides of the sample, the pressure difference between the two sides of the sample is recorded, and the permeability of the sample is calculated.
ISO9237 Mask Airflow Resistance Tester Use Differential Pressure Method
Caratteristiche del prodotto
The instrument chip and sensor are imported from the United States, the test results are accurate, buona ripetibilità, alta precisione.
The calibration of pressure sensor and flow sensor is traceable.
Design raffinato: the instrument USES microcomputer technology, il processo di test è completamente automatizzato, Risultati del display LCD touch screen veloci e precisi, e con funzioni di registrazione ed elaborazione dei dati, con stampa.
(3) prestazioni superiori: compared with the traditional breathability meter, this instrument has a very high advantage, the low breathability of the paper, can be set higher pressure difference, and the high breathability of the paper can be set lower pressure difference, easy and accurate determination of the results.
Easy to use, high automation: the traditional breathability tester test is not only slow and laborious, anzi, the breathability tester test is automatic and fast, at the same time the accuracy of the test results has been guaranteed.Misoperation or low reproducibility of test results, which are caused by poor instrument design and manufacturing techniques, are effectively avoided in this instrument.
