Reduction of Probe-Spacing Effect in Pulsed Eddy Current Testing

Donald Waidelich

doi:10.1520/STP41993S

SYMPOSIA PAPER Published: 01 January 1958

STP41993S

Reduction of Probe-Spacing Effect in Pulsed Eddy Current Testing

Source

In using pulsed eddy currents to determine the thickness of cladding, it was found that the output wave as observed on the screen of a cathode-ray oscilloscope had several unusual points. These points were stationary as the probe-to-metal spacing varied, but moved vertically as the cladding thickness changed. Tests on a clad plate seemed to indicate that the points could be used to determine cladding thickness with little interference from changes in the probe-to-metal spacing. One such method involves the use of small photocells placed in front of the oscilloscope screen with the output of the photocells connected to a recorder. The initial tests with such a system are presented in this paper.

Author Information

Waidelich, Donald, L.

Argonne National Laboratory, Lemont, Ill.

Shipping & Handling

Domestic Shipping

Domestic orders are delivered via United Parcel Service (UPS) or United States Postal Service (USPS). Transit times average 3 to 5 business days. Please be aware that UPS will not deliver packages to Post Office Boxes.

Domestic Rush Orders

Please Contact Us.

International Standard Shipping

International orders are delivered via courier post services which can be either a postal service, courier service, or a combination of both. Standard Service is untraceable. Please allow 4-7 weeks for delivery.

International Expedited Shipping

Please Contact Us.

Please be aware that carriers will not deliver packages to Post Office Boxes. Because of the variability of customs processes and procedures in different countries, ASTM International cannot guarantee transit times to international destinations. Customs duty and taxes are the responsibility of the consignee.

Shipping & Handling charges follow the rate schedule, below:

Order Total	Shipping & Handling Fee (US Domestic)
Up to $50.00	$18.72
$50.01 to $100.00	$20.80
$100.01 to $150.00	$29.52
$150.01 to $250.00	$39.09
$250.01 to $500.00	$56.25
$500.01 to $750.00	$76.42
$750.01 to $1000.00	$93.15
$1000.01 to $1500.00	$121.27
$1500.01 to $2500.00	$158.38
$2500.01 to $4999.00	$209.04
$5000.00 to higher	FREE

Order Total	Shipping & Handling Fee (International)
Up to $50.00	$68.72
$50.01 to $100.00	$70.80
$100.01 to $150.00	$79.52
$150.01 to $250.00	$89.09
$250.01 to $500.00	$106.25
$500.01 to $750.00	$126.42
$750.01 to $1000.00	$143.15
$1000.01 to $1500.00	$171.27
$1500.01 to $2500.00	$208.38
$2500.01 to $4999.00	$259.04
$5000.00 to higher	FREE

Shipping and Handling charges are approximate. Additional charges may be incurred if your order requires multiple shipments. This does not apply to complete sets and sections.

Reprints and Permissions

Reprints and copyright permissions can be requested through the
Copyright Clearance Center

Details

Developed by Committee: E07

Pages: 191–200

DOI: 10.1520/STP41993S

ISBN-EB: 978-0-8031-5948-8

ISBN-13: 978-0-8031-6102-3

Reduction of Probe-Spacing Effect in Pulsed Eddy Current Testing

Author Information

Related

Reprints and Permissions

Details