What is the range of mask particle filtration efficiency tester?

At present, the domestic quantity and value traceability system does not have the calibration method of the mask particulate matter filtration efficiency tester, relying on various measurement and calibration institutions in the field of traceability activities calibration items and capabilities are not the same, and most measurement institutions have not calibrated the main indicator of filtration efficiency, only some of the flow rate and pressure difference and other conventional parameters of the calibration.

 

The indicators of mask particle filtration efficiency are as follows, the area of 100cm2; flow rate of (30 ± 2) L/min and (85 ± 2) L/min; airflow resistance that the pressure difference does not exceed 343.2 Pa; aerosol concentration monitoring device, the dynamic range of the particle detector (0.001 ~ 200) mg/m3; mask particle filtration efficiency of the results of the measurement range ( 0.001~99.999)% with a resolution of at least 0.003%.

 

Mask particle filtration efficiency tester range

 

This method applies to the calibration of new manufacturing, in use and after repair of the mask particulate matter filtration efficiency tester.

Mask particle filtration efficiency tester calibration conditions

 

1. Environmental conditions

 

(1) Temperature: (25±5)℃

 

(2)Relative humidity: ≤85%

 

2. Main standard instrument

 

(1) Digital display caliper: measuring range (0~200)mm, resolution 0.01mm

 

(2) Standard digital display flow: measuring range (0~200)L/min, maximum error

 

difference ±1 L/min

 

(3) Standard digital display differential pressure gauge: measuring range (0~1000)Pa, maximum error

 

difference ±0.5%FS

 

(4) Digital display particle tester: measurement range (0.001~200) mg/m3, maximum error ±0.3% or ±0.5%FS.

 

Maximum error ±0.3% or ±0.001 mg/m3

 

Mask particle filtration efficiency tester measurement characteristics

 

(1) Test test area: 100 cm2±1 cm2

 

(2) Detection of airflow: the maximum allowable error ± 2 L / min

 

(3) Pressure difference (airflow resistance): maximum permissible error ± 1% FS

 

Mask particle filtration efficiency tester range is shared here, I hope it will be helpful to you.