The Solution is in the ZCorr Software
Analysis of All Correlations Found
Click a Thumbnail, See the 8 Best Correlations.
Above: Many correlations at many loggers.
One leak or many?
Click Listen. Logger No. 4 much louder (below).
Click Play and listen to the leak for 60 seconds.
Correlation at 2:15 AM but not at 1:15 AM or 3:15 AM.
Answer: Usage at service
The Sound Level Graph (above) is for Logger no. 7 (high-lighted in the Leak Index Graph).
The Leak Index shows very little sound, and the Graph shows usage noise (meter) during the 2:15 AM recording.
The Leak Index Graph (bars) shows good leak sounds at Loggers no. 1, 2, and 3.
The Sound Level Graph shows a very steady leak noise for Logger no. 3.