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CP 1 – Cathodic Protection Tester Course Manual

02/01/05

Section 4

Chapter 4–Safety

Introduction............................................................................................... 4:1

Electrical.................................................................................................... 4:2

Electrical Equipment (Rectifiers) ...................................................................................... 4:2

Cathodic Protection Surveyss............................................................................................ 4:6

HVAC Interference............................................................................................................ 4:7

Hazardous Material.................................................................................. 4:8

Material Safety Data Sheets (MSDS)................................................................................ 4:8

Explosions or Ignitions...................................................................................................... 4:5

Reaction Products.............................................................................................................. 4:9

General Precautions.................................................................................. 4:9

Section 5

Chapter 5–Field Measurements

Other Portable Reference Electrodes................................................................................. 5:1

Typical Applications.......................................................................................................... 5:3

Measuring Current ...................................................................................... 5:8

Use of an Ammeter............................................................................................................ 5:8

Shunts..............................................................................................................................5:10

Typical Applications........................................................................................................5:15

Measuring Resistance ............................................................................... 5:22

Typical Measurements.....................................................................................................5:22

Using Ohm’s Law............................................................................................................5:22

Using an Ohmmeter.........................................................................................................5:23

Electrical Continuity................................................................................. 5:24

Electrical Isolation.................................................................................... 5:24

Purpose and Usage...........................................................................................................5:24

Isolation (Insulating) Joints .............................................................................................5:25

Accidental Contacts.........................................................................................................5:25

Testing Resistance Between a Pipe and Casing...............................................................5:26

Measuring Structure Continuity ......................................................................................5:26

Diode Bias................................................................................................. 5:27

Measuring Electrolyte Resistivity............................................................. 5:28

Wenner Four-Pin Method................................................................................................5:28

Soil Box...........................................................................................................................5:30