Operating point data

Compressor unit

The physical compressor at a compressor station.

Compressor performance curve set

The set of speed vs. efficiency curves associated with the compressor.

Sample time stamp

The date and time that the operating point sample was taken, to the nearest minute.

Head pressure (y)

The y-coordinate of the operating point sample.

Flow rate (x)

The x-coordinate of the operating point sample.

Suction/discharge pressure

The suction and discharge pressures at the date and time of the operating point sample.

Suction/discharge temperature

The suction and discharge temperatures at the date and time of the operating point sample.

Compressor speed

The unit speed at the date and time of the operating point sample.

Unit Status

The state of the compressor (on-line or off-line) at the date and time of the operating point sample. This may be derived from either a RealTime database (RTDB) status point or two RTDB analog points. For more information, refer to Unit starts.

Flow conditions status/data quality

The associated flow conditions status and the data quality of the operating point (alarm, off-scan, manual, unknown, or normal) at the date and time of the operating point sample.