Airflow Measurement Techniques and Equipment

The video tutorial by Tony from Philp Products demonstrates how to use the Philp STA2 hot wire anemometer to measure CFM in HVAC ducts. It covers the importance of airflow measurement, the setup and use of the STA2, and methods for conducting a duct traverse. The tutorial explains how to calculate average CFM using both time and point averages, emphasizing the importance of proper measurement techniques and positioning. The video concludes with a reminder to compare results with manufacturer specifications and offers additional resources for further learning.

What is the primary function of the Phil Piece STA2 anemometer?

• To measure air temperature

• To measure air velocity

• To measure humidity

• To measure static pressure

Why is it important to perform a duct traverse away from elbows and bends?

• To avoid damaging the duct

• To ensure accurate airflow readings

• To prevent sensor overheating

• To reduce noise levels

How many holes are required for a duct less than 30 inches wide?

• Six

• Five

• Four

• Three

What should you do after drilling holes in the duct for testing?

• Leave them open for ventilation

• Cover them with mastic tape

• Paint over them for protection

• Cap or tape them to prevent air leakage

What is the first step in setting up the STA2 for a CFM test?

• Insert the telescoping wand

• Select the measurement mode

• Power on the device

• Calibrate the sensors

What is the purpose of the telescoping wand in the STA2 setup?

• To measure duct diameter

• To adjust the device height

• To sample airflow at different points

• To calibrate the sensors

How long should each leg of the timed average measurement take?

• 5 seconds

• 10 seconds

• 15 seconds

• 20 seconds

What is the main difference between timed and point average methods?

• Timed average samples over time, point average samples at specific depths

• Timed average measures air speed, point average measures temperature

• Timed average is more accurate than point average

• Timed average uses a stopwatch, point average uses a ruler

How many points are measured in each hole using the point average method?

• Four

• Five

• Six

• Seven

What was the average CFM measured using the point average method?

• 700 CFM

• 694 CFM

• 735 CFM

• 750 CFM