Verify and document the following prior to functional testing:

1. Size (hp), rated capacity (acfm), and control type of each air compressor.
2. Total system capacity (the sum of the individual capacities).
3. System operating pressure.
4. Compressor(s) designated as trim compressors.
5. Method for observing and recording the states of each compressor in the system, which shall include at least the following states:
   1. Off
   2. Unloaded
   3. Partially loaded
   4. Fully loaded
   5. Short cycling (loading and unloading more often than once per minute)
   6. Blow off (venting compressed air at the compressor itself)

Step 1: As specified by the test methods outlined in the Construction Inspection, verify that these methods have been employed, so that the states of the compressors and the current air demand (as measured by a flow sensor or otherwise inferred by system measurements) can be observed and recorded during testing.

Step 2: Run the compressed air supply system steadily at as close to the expected operational load range as can be practically implemented, for a duration of at least 10 minutes.

Step 3: Observe and record the states of each compressor and the current air demand during the test.

Step 4: Confirm that the combinations of compressors states meet the following criteria:

1. No compressor exhibits short-cycling (loading and unloading more often than once per minute).
2. No compressor exhibits blowoff (venting compressed air at the compressor itself).
3. For new systems, the trim compressors shall be the only compressors partially loaded, while the base compressors will either be fully loaded or off by the end of the test.

Verify and document the following monitoring system capabilities prior to functional testing:

1. Measurement of header or compressor discharge pressure.
2. Measurement of amps or power of each compressor.
3. Measurement or determination of airflow in cfm.
4. Data logging of pressure, power, airflow, and calculated compressed air system specific efficiency in kW/100 cfm at intervals of 5 minutes or less.
5. Maintained data storage.
6. Visual trending display of each recorded point, load, and specific efficiency.

Verify and document the following monitoring system capabilities:

1. Data observed during test is being recorded to a log file that can be opened and viewed to see trend of airflow, power, and specific efficiency in at least 5 minute intervals.
2. Airflow and compressor power data vary with loading and unloading of the compressor within typical performance expectations. Measurements should be observed across various loading, whether manually varied in response to actual operational loads.