DAY 10 — Calibration Certificate

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33 Terms

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What is a calibration certificate?
A document containing relevant information about the calibration and its measurement results
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What does a calibration certificate show?
That the measurement was performed using appropriate methods standards and conditions
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What should be checked about UUT identification?
What was calibrated such as the model and serial number
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What does UUT mean in the infographic?
The unit under test
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What should be checked about the calibration method?
How the instrument was calibrated including the procedure or method
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What should be checked about reference standards?
What the instrument was compared against including the applicable standard or equipment
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What should be checked about measurement results?
The reference indication error and correction where applicable
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What should be checked about measurement uncertainty?
The stated uncertainty associated with the measurement result
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What does measurement uncertainty help answer?
How confident we are in the result
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What should be checked about conditions?
The relevant environmental conditions
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What should be checked about traceability?
The connection to appropriate measurement references
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What does as-found mean?
The condition or result before adjustment when applicable
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What does as-left mean?
The condition or result after adjustment when applicable
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What example reference value is shown?
100.00 °C
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What example UUT indication is shown?
100.12 °C
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What example error or correction is shown?
+0.12 °C
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What example expanded uncertainty is shown?
±0.20 °C
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Are the numbers on a certificate the complete measurement story?
No
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What question should a calibrator ask about the complete certificate?
Can I tell the complete measurement story from this certificate?
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What should be asked about what was measured?
What was measured
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What should be asked about how it was measured?
How it was measured
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What should be asked about the reference?
What reference was used
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What should be asked about interpreting the result?
How should the result be interpreted
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What is a calibration certificate red flag?
A PASS statement where the supporting results applicable requirement or decision process is unclear
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What is missing in the red-flag example?
Uncertainty specification decision rule and clear results
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Why is a PASS statement alone insufficient?
The supporting measurement information and decision process should be clear
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What global reference is listed for terminology and concepts?
VIM3 — JCGM 200:2012
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What ISO standard is listed for calibration laboratory requirements?
ISO/IEC 17025:2017
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What ILAC document is listed?
ILAC P14:09/2020
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What other references may support a calibration certificate?
The applicable calibration method or standard manufacturer specification and laboratory procedure or SOP
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What should you check if a certificate reports a result but no measurement uncertainty?
The supporting information before using the certificate
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What is the main lesson of the certificate infographic?
A certificate should provide enough context to understand the measurement result rather than simply showing a calibration status
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Why should the word CALIBRATED not be accepted without context?
Because the certificate should also explain what was measured how it was measured and how the result should be interpreted