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Technical Papers
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The following technical papers describe our
instruments and how to use them:
- 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.
- Setup for Testing
the Gain and Polarity of the Clamp at the Wellhead
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Precision Instruments
Since 1965 |