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3.2
Syrinix Severity Score (S3)
The S3 score is a non-dimensional measure of pressure transient activity calculated within PIPEMINDER-S
itself. Large changes which happen quickly result in a high score, small changes over a longer period result in
a lower score and a continuously stable pressure results in a score of zero.
Tracking and profiling S3 for a particular site over time is a good measure of the pipeline’s transient activity
and readily indicates if the activity level has increased or if mitigation work has been successful in reducing it.
3.3
Timekeeping
PIPEMINDER-S contains a very low drift clock which is used to time stamp data. This clock is set on deployment
using an internal GPS receiver and antenna.
Upon deployment it is important to consider the intended use of the PIPEMINDER-S device. For applications
that require a high degree of time accuracy Syrinix have made available software which incorporates a
Network Time Protocol (NTP) function. NTP is a method to synchronise all participating device clocks within
50 to 100 milliseconds of Coordinated Universal Time (UTC) via the cellular network.
NTP requires a reliable cellular signal, in situations where a poor cellular signal is affecting the accuracy of NTP
please follow chapter 8.2 Manual GPS Time Synchronisation.
Table 1 pro
vides examples of different deployment scenario’s and what is required to achieve a high time
accuracy.
Application
Initial GPS Lock/Leap Seconds
NTP Software
Standard deployment
For Network Monitoring
Triangulation of Network
Events
x
Table 1: Timekeeping application
