How to Get Better Accuracy with a Clamp-on Direct Current Ammeter
Solving cathodic protection problems. This abbreviated paper discusses: How much lost current can you find? What is the resolution and accuracy?
Posted 13 October 2000.
Measuring Unwanted Alternating Current in Pipe
Alternating Current (AC) flowing in a pipe can be a portent of trouble, such as corrosion or harm to persons. I discuss interference and fault location, corrosion, and personnel safety.
Posted 5 October 2000.
Structure, Durability, and Accuracy of a Permanently Mounted and Buried Clamp-on Direct Current Ammeter
The structure of the MER Meter type clamps; why we expect they will continue to work satisfactorily for a lot longer than 3 years; what accuracy and resolution can be expected.
Posted 23 September 2000.
Use and Accuracy of a Clamp-on Direct Current Ammeter
Solving cathodic protection problems. How much lost current can you find? What is the resolution? Accuracy? Zero offset?
Posted 23 June 2000.
Line Current Monitor
Mr. Joe Maxwell has written on how to find electrical contacts on gas pipelines [Materials Performance, April 1999, page 33]. My emphasis here is related, but somewhat different. This paper relates to knowing of the contact, when contact occurred, and a lot more.
Posted 13 October 1999.
Measure Structure Current with a Clamp-on Ammeter
How to measure the actual electrical current flowing in a structure -- say a concrete column, a ground cable, or a 3 foot diameter pipe.
Posted 31 August 1999.
How to Save Time Locating and Measuring Interference Current from a Foreign Line
A pipeline or cable may carry an unwanted and sometimes unexpected current because of interference from a foreign line, subway, or other conductor in the vicinity. Corrosion is likely where current leaves a line and enters ground soil so we want to locate and measure the current and find its source.
Pipeline Protection with Clamp-On DC & AC Ammeters
Clamp-on DC and AC ammeters are used by corrosion engineers and others to accurately measure actual pipe and cable current -- on the line -- during normal operations. This saves time and trouble.
Amp Clips for Corrosion Control
Tells what can be done with sensitive DC and AC clamp-on ammeters from ¼ inch to 5 feet diameter. An update of a paper given at the Appalachian Underground Corrosion Short Course.
Clip and Read Measurement of Offdraw Current in a Vehicular Battery
On a production line an objective is to measure the 20 mA offdraw current accurately and quickly in each of a group of similar vehicles.