Abriox

DATA DISPLAY

The CPSM screen is divided into three areas:

• LEFT: Pipeline folders with icons identifying MERLIN TR Monitors and Test Post Monitors

• TOP: Tabular data showing all values displayed in the graph

• BOTTOM: Graph of CP values with voltage shown on the left axis and, where displayed, current on the right axis.

CPSM Data screen layout

By clicking on the toolbar the user can view the most recent 30, 60 or 90 days’ data – or all data stored for that monitor.

In normal operation a weekly report will be generated by each monitor showing the minimum, maximum and average values recorded in the week for each measurement channel.

Periodic (Weekly) Report of CP values from a Transformer Rectifier. There has been a temporary loss of AC supply during one week.

For short term problem-solving, a monitor can be switched to a diagnostic mode in which hourly readings are taken and reported daily. CPSM automatically notifies the user of monitors that are in this mode to avoid incurring unnecessary communication costs for the additional frequency of data.

Hourly measurements can facilitate the identification of CP problems. This pipeline has fluctuating levels of AC but the cathodic protection system is working consistently

If the distance along the pipeline is entered for each monitor, a chainage graph can be generated for each reporting date, showing the profile of values for user-selectable channels.

Chainage graph with the X-axis as the pipeline length and ON potential values from 2 TRs and 2 test posts taken at the same time

Status information may be displayed for each monitor, including:

• Battery level

• GSM signal

• Self test & status information.