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AC Yoke Cal 11

This document outlines the procedure for calibrating magnetic yokes used for magnetic particle testing. It specifies that field inspectors must calibrate their yokes at least once every 12 months by lifting a 10 pound weight with the yoke and maintaining lift for 5 seconds, repeating this step 3 times. If the yoke cannot perform as outlined, it must be returned for repair. Records of calibration must include a description of the calibrated item, its serial number, date, who performed it, and any issues found.

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1K views2 pages

AC Yoke Cal 11

This document outlines the procedure for calibrating magnetic yokes used for magnetic particle testing. It specifies that field inspectors must calibrate their yokes at least once every 12 months by lifting a 10 pound weight with the yoke and maintaining lift for 5 seconds, repeating this step 3 times. If the yoke cannot perform as outlined, it must be returned for repair. Records of calibration must include a description of the calibrated item, its serial number, date, who performed it, and any issues found.

Uploaded by

John Dolan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOC, PDF, TXT or read online on Scribd
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Section : Calibration Control 3/11 Approval : Date:1st June 2000

Subject : AC Yoke. Revision No : 3 PTSCOS/06-2000

SUBJECT : CALIBRATION OF MAGNETIC YOKES.

1.0 PURPOSE

1.1 To establish a standard procedure for calibration of magnetic yokes.

2.0 APPLICATION

2.1 All magnetic yokes used by field inspectors to conduct magnetic particle
testing .

2.2 This procedure applies to the initial calibration of newly aquired yokes and
to the periodic calibration at the specified intervals.

3.0 ASSOCIATED MATERIALS.

3.1 Ten { 10} pound weight

4.0 PROCEDURE

4.1 Field inspectors shall calibrate their magnetic yokes at least once every 12
months as outlined in this procedure.

4.2 Visually examine the yoke for any defects which would affect accuracy
function or use.

4.3 Magnetic yokes shall have a dead weight lifting power of at least ten { 10 }
pounds.

4.4 Place the yoke on a ten pound weight of carbon or alloy steel so that the
poles of the yoke are flat on the surface of the weight.

4.5 Apply electric current to the yoke and lift the weight. Once the weight is
fully suspended , continue applying the current for five { 5} seconds.

4.6 Return the weight to it’s rest position and remove the electric current.

4.7 Repeat steps 4.4 , 4.5 and 4.6 two additional times.

4.8 Each time , the yoke must be able to lift the weight and keep it suspended
as long as the current is applied to the yoke.

4.9 If the yoke is unable to perform as outlined in this procedure it shall be


returned to inspection services for repair.

4.10 All repair work must be performed by a qualified individual.

ItemNo:PTSCOS,CAL3/11-6/2000 Page 1 of 2
Section : Calibration Control 3/11 Approval : Date:1st June 2000

Subject : AC Yoke. Revision No : 3 PTSCOS/06-2000

5.0 DOCUMENTATION

5.1 A record of calibration shall be furnished to main office. The record shall
include as a mimimum , the following information.

A A description of the item calibrated.

B Serial number of item calibrated.

C The date calibration was performed.

D Identifying mark of the individual performing the calibration.

E Notation of any out of tolerance conditions.

ItemNo:PTSCOS,CAL3/11-6/2000 Page 2 of 2

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