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Technical Papers
on How to Use Swain Meters
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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Setup for Testing the Gain and Polarity of the Clamp
at the Wellhead
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