PCWI Coating Thickness Standards - Calibration

Calibration is done by comparison via Certified equipment traceable to a NATA Endorsed Test Report and NIST Certificates of Calibration

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PCWI Coating Thickness Standards - Calibration
  • Calibration Standards

For new Coating Thickness Standards and Class 1 recertification
Calibration is done by comparison via Certified equipment traceable to a NATA Endorsed Test Report and NIST Certificates of Calibration, in accordance with PCWI Reference Document LWI 6.

Ferrous Uncertainty of Measurement:
±0.25µm up to 6000µm
0.40µm from 6000µm up to 12500µm

Non-Ferrous Uncertainty of Measurement:
±0.30µm up to 6000µm
±0.40µm from 6000µm up to 12500µm.

 

Class 2 Coating Thickness Standard recertification
Calibration is done by comparison to the applicable clauses of AS 3894 and PCWI Reference Document LWI 16.

Uncertainty of Measurement up to 1500µm:
±1.0µm + 1% up to 50µm coating thickness
±2.0µm + 1% over 50µm coating thickness

Uncertainty of Measurement from 1500µm up to 6000µm
±(0.01mm + 1% of reading) 1500µm to 2500µm
±(0.01mm + 3% of reading) 2500µm to 6000µm

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  • What is the function of Coating Thickness Gauges?

    To check the thickness (depth) of Coatings applied on Ferrous or Non-Ferrous substrates for surface protection and appeal.

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  • What is the function of PCWI Calibration Standards?

    To check the accuracy and calibrate all coating thickness measuring gauges.

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  • How do PCWI Calibration Standards check the accuracy of Coating Thickness Gauges?

    Each Coating Standard consists of one Zero plate and four epoxy coated reference plates. The reference plates carry certified coating thicknesses that differ on each plate.

    The gauge under check is then used to relate the zero and reference plates against the gauge indicated readings – In this way arriving at agreement or variance.

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  • If variance shown from the standards how is re-calibration carried out?

    Coating Thickness Gauges carry adjustable calibration that can be used to bring the gauge readings in to conformity with the certified standards.

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  • Will this checking and calibration ensure the accuracy of the gauge?

    Yes – subject to the resolution tolerances within the instrument. A regular programme of checking and calibration is recommended.

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  • How is checking and calibration by PCWI Calibration Standard cost effective?

    To meet application and performance specifications the applicator (contractor) must rely on the accuracy and reproducibility of his Thickness Gauge readings. Regular checking and calibration to ensure this are critical.

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  • Can the Standards be re-certified?

    Yes, we offer Certification to Class 1 or Class 2, this depends on the customer’s requirements, and the condition of the plates on the Standard when returned to PCWI.

    Class One Certification
    Coating Thickness Plates are measured with reference to the original specification

    Uncertainty of Measurement:
    Ferrous: ±0.25µm up to 6000µm, ±0.40µm from 6000µm up to 12500µm

    Non-Ferrous: ±0.30µm up to 6000µm, ±0.45µm from 6000µm up to 12500µm

    Class Two Certification
    Coating Thickness Plates are measured with reference to PCWI Internal Reference Standards

    Uncertainty of Measurement
    ±1.0µm +1% up to 50µm coating thickness.
    ±2.0µm +1% from 50µm to 1500µm
    ±(0.01mm + 1% of reading) 1500µm to 2500µm.
    ±(0.01mm + 3% of reading) 2500µm to 6000µm.

    Recommended Recalibration
    Australia: 12 months or customer specified recalibration period
    Overseas: Customer specified recalibration period

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  • What are the Calibration Certificates traceable to?

    Traceable to Australian National Standards via NATA Endorsed Test Reports traceable to NMIA. International Standards via NVLAP Certificates of Calibration traceable to NIST. The Mutual Recognition Agreements ensures acceptance of these reports as equivalent in each other’s economy.

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