Proceq PM8500 User Manual page 33

Chipping Graph View
The Chipping Graph View provides an area mapping of the measured potential values with a
fixed green/yellow/red color palette referring to the thresholds set in the Statistic View.
An immediate overview is then provided discriminating the actively corroding areas (red) from
the passive areas (green) and the uncertain regions (yellow).
You can zoom and scroll to any desired location and add text notes to any cell or group of
cells.
NOTE! It is always advisable to perform direct visual check on open locations to confirm/refine
the expected corrosion potential thresholds.
Figure 29 : PM8500 Profometer App: Chipping Graph View
BASIC MODE:
Chipping Graph
The threshold limits can be selected manually or using the limits suggested by ASTM C 876-
09, Appendix X1, assigning a 90% probability of corrosion ongoing to the areas more negative
than -350 mV, and a 90% probability of no corrosion to the areas more positive than -200 mV,
judging uncertain the behavior in the regions in between the two thresholds.
An immediate overview is then provided discriminating the actively corroding areas (red) from
the passive areas (green) and the uncertain regions (yellow).
25. September 2023 © Copyright 2023, PROCEQ SA 33