ii PCM
+
Operation Manual
Table of figures
Figure 2.1: Tx Facia
3
Figure 2.2: Frequency Selector
3
Figure 2.3: Rectifier connection to pipeline
5
Figure 2.4: PCM connection to pipeline
5
Figure 2.5: PCM connection using test point
6
Figure 2.6: PCM connection using sacrificial
anode for grounding
6
Figure 3.1: Receiver Controls
8
Figure 4.1: Peak mode
12
Figure 4.2: Null mode
12
Figure 4.3: Pipeline current flow
13
Figure 4.4: Pipeline current flow
13
Figure 4.5: Pipeline fault
13
Figure 4.6: mA fault graph
14
Figure 4.7: dBmA fault graph
14
Figure 4.8: mA fault graph
14
Figure 4.9: dBmA fault graph
15
Figure 4.10: Collected data and interpreted results 15
Figure 5.1: Tie line 1
16
Figure 5.2: Tie line 2
16
Figure 5.3: Loop
16
Figure 5.4: Looped system 1
16
Figure 5.5: Looped system 2
16
Figure 5.6: Distributed system
17
Figure 5.7: Interpreting distributed systems
17
Figure 5.8: Poor coated steel shield
17
Figure 5.9: Perfect coating
17
Figure 6.1: Parallel Pipes Example 1
18
Figure 6.2: Example 1 interpretation
18
Figure 6.3: Parallel Pipes Example 2
18
Figure 6.4: Example 2 interpretation
19
Figure 6.5: Parallel Pipes Example 3
19
Figure 6.6: Example 3 interpretation
19
Figure 6.7: Angled Pipes Example 1
19
Figure 6.8: Parallel Pipes Example 4
20
Figure 6.9: Parallel Pipes Example 5
20
Figure 7.1: A-Frame Fault-Finding
21
Figure 7.2: A-Frame Fault-Finding
22
Figure 7.3: Locating the fault
22
Figure 7.4: Taking a reading
22
Figure 7.5: Comparing fault severity
22
Figure 8.1: Interpreting results
24
