MANUFACTURING MODULAR OPERATION THEATER

ISO 14644 is a standard that provides guidelines for the classification of airborne particulate cleanliness in cleanrooms and controlled environments. It does not specifically outline procedures for air velocity testing using a pitot tube. However, I can provide you with a general explanation of how to conduct an air velocity test using a pitot tube.
Here’s a step-by-step procedure for conducting an air velocity test with a pitot tube:Here’s a step-by-step procedure for conducting an air velocity test with a pitot tube:

Equipment Preparation:

• Ensure you have a calibrated pitot tube, which consists of a small tube connected to a pressure gauge.
• Verify that the pitot tube is clean and free from any obstructions or damage.
• Calibrate the pressure gauge according to the manufacturer’s instructions.

Test Setup:

• Position the pitot tube in the airflow that you want to measure. The pitot tube should be aligned with the airflow direction and perpendicular to the airflow.
• Make sure there are no obstructions or disturbances near the pitot tube that could affect the airflow.

Measurements:

• Turn on the pressure gauge and allow it to stabilize.
• Position the pitot tube in the airflow, ensuring that it is fully exposed to the airflow.
• Hold the pitot tube steady for a sufficient period to take accurate readings.
• Record the pressure reading from the gauge.

Calculation:

• Use the recorded pressure reading to calculate the air velocity using the appropriate formula or conversion table provided with the pitot tube.
• If necessary, convert the air velocity from the pitot tube measurement to the desired unit of measurement specified in ISO 14644.

Repeat and Average:

• Repeat the measurements at multiple locations within the cleanroom or controlled environment to ensure representative sampling.
• Take multiple measurements at each location and calculate the average air velocity to obtain a more reliable result.

Documentation:

• Record all the measurement data, including the location, time, and corresponding air velocities.
• Include information about the pitot tube used and its calibration details.
• Document any observations or anomalies that may have affected the measurements.