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1
MEASURING AND TEST EQUIPMENT
CALIBRATION
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Calibration 2
Definitions
• Metrology
• Measuring & Test Equipment (M&TE)
• Calibration
• Measurement Standard
• Accuracy and Precision
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Calibration 3
Calibration System
• MIL-STD-45662 Military Standard – Calibration System Requirements.
• ISO 10012 – Measurement Management Systems – Requirements For Measurement Processes And Measuring Equipment.
• ANSI Z540 – Calibration & Measurement & Test Equipment – General Requirements
• Must Be An Integral Part Of The Quality System
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Calibration 4
Suggested Practices
• Written Description Of The Calibration System
• Listing Of All Standards Used
• Established Calibration Intervals
• Mandatory Recall Of Inspection And Test Equipment
• Measuring And Test Equipment Properly Identified To Reflect Calibration Status
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Calibration 5
Suggested Practices (cont’d)
• Maintain Historical Records Of Inspection And Test Equipment Calibration
• Utilize Standards Whose Accuracy Is Certified As Traceable To U.S. Or International Standards
• Written Calibration Procedures, Which Specify The Accuracy Of The Equipment Being Calibrated And The Accuracy Of The Standards Used
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Calibration 6
Sample Calibration Record2007 GAGE CALIBRATION RECORD
Gage Asset No. Location
Operator Number
Significant Dimensions Cycle Source
Date Due
Date Complete
CALIPERS C12456#1
Extruder 108 6 inch 6 moGage Block N-07 10/15/07
C12458#1
Extruder 12 12 inch 6 moGage Block N-07 10/17/07
C12462#2
Extruder 320 6 inch 6 moGage Block N-07 10/21/07
CNC N11052CNC house 12 0 to 12' 12 mo Outside J-07 5/22/07
MICROMETERS M13465 Press #1 119 0 to .385" 9 moGage Block D-07 11/14/07
M13466 Press #2 318.500
to .750" 9 moGage Block D-07 11/22/07
M13467 Press #3 289 0 to .385" 9 moGage Block D-07 11/9/07
M13466 Press #2 318.500 to .750" 9 mo
Gage Block D-07 11/22/07
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Calibration 7
Suggested Practices (cont’d)
• Utilize Standards That Have A Higher Accuracy Level Than The Accuracy Requirements Of The Equipment Being Calibrated
• Control Of Outside Calibration Sources• Environmental Controls• Out Of Tolerance Conditions• Control Of Inactive M&TE
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Calibration 8
Suggested Practices (cont’d)
• Use Of Tamper Proof Seals
• Storage And Calibration Facilities
• Customer Furnished M&TE
• Employee Owned M&TE
• M&TE Must Be Adequate To Permit Reliable Inspections
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