Air Flow Test Standard

Method of testing performance of laboratory fume hoods.

Air flow test standard.

The osha accepted qlft and qnft protocols and procedures are contained in appendix a of this section. Fully calibrated certified traceable air flow leak standards cts leak standard calibration lab is a2la accredited and iso 17025 certified ensuring that the strictest controlled calibration procedures are followed during the course of the manufacturing process. These certified leak orifices mount into master calibration parts or plug into test lines and manifolds for calibration processes. 1910 134 f 6 qlft may only be used to fit test negative pressure air purifying respirators that must achieve a fit factor of 100 or less.

Edana 140 2 recommended test method. This standard is published by the american national standards institute and the american society of heating refrigerating and air conditioning engineers inc. A thermo anemometer with an averaging feature and datalogging is best suited for this type of measurement. Definition of standard hvac air flow rate per ton.

A thermo anemometer with a telescopic articulated probe deflecting vane anemometer with a low flow probe rotating vane anemometer or velocity matrix can be used to test spray booths. To pass this test as detailed in the industry standard aama wdma csa 101 i s 2 a440 a commercial product must not allow more than 0 1 to 0 3 cubic feet per minute of air to pass through every square foot of the opening the manufactured product fills under prescribed pressure differences depending on product type and performance class. The rate of flow of air passing perpendicularly through a given area of fabric is measured at a given pressure difference across the fabric test area over a given time period. Determination of air flow for powered air purifying respirators subpart kk section 84 1157 a rct apr stp 0014 pdf icon determination of leakage of drinking tube and accessories for respirator facepieces subpart g section 84 63 a c and d rct apr stp 0025 pdf icon.

1 2 this test method is designed for the measurement of values of specific airflow resistance ranging from 100 to 10 000 mks rayls pa s m with linear airflow velocities ranging from 0 5 to 50 mm s and pressure differences across the specimen ranging from 0 1 to 250 pa. The combined air mix then flows up the exhaust duct. 400 cfm per ton of cooling capacity. Measured across the cooling coil typical a c air flow is about 400 to 450 cfm per ton of cooling capacity.

It concerns itself primarily with methods of testing fume hoods to check their operation. All of our leak standards are provided with calibration certificates that are traceable to nist. The upper limit of this range of linear airflow velocities is a point at which the airflow through most porous materials is. The fit test shall be administered using an osha accepted qlft or qnft protocol.