AMPP CP1 Tester case studies
AMPP CP1 Tester · Put your knowledge to work in context.
The Cathodic Protection Tester (CP1) certification is an entry-level credential administered by AMPP for people who observe, record, or measure the effectiveness of cathodic protection systems. It is aimed at CP field personnel, technicians, and anyone who supervises CP systems or records field data, and it serves as a gateway into the cathodic protection profession. The AMPP CP1 Tester case studies are 5 cases and about 3,852 words.
141 V AC at Test Station TS-14
A two-person crew is running a close-interval survey on a 6 in. coated gas line that shares a corridor with a 138 kV transmission line for 3 km at a 12 m offset.
739 words, about 4 min2Which Reference Electrode Goes in the Truck
Before a survey, a technician checks two copper/copper-sulfate reference electrodes against a third electrode kept as a shop reference. Electrode A reads 5 mV and electrode B reads 19 mV against the shop cell.
735 words, about 4 min3Rectifier Output Has Fallen and Potentials Have Moved
A 40 V / 20 A air-cooled rectifier feeds a 300 m horizontal anode bed in a drainage swale. At commissioning, panel meters read 32 V and 9.0 A with the taps as found.
783 words, about 4 min4Twelve Test Stations, Three Strange Readings
A technician takes pipe-to-soil potentials at 12 test stations on a coated line laid in mixed soil. At station 3 the reading is -0.62 V with the half-cell on dry gravel over the pipe; moved 0.5 m toward the ditch into damp soil it reads -0.79 V.
788 words, about 4 min5The Survey That Does Not Add Up
An 800-reading close-interval survey covers 4 km of pipeline at 5 m spacing. At 2.34 km the potentials shift from -0.90 V to -0.68 V and back over about 20 m, near a road crossing; a foreign pipeline crosses at 2.40 km.
807 words, about 4 min