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Coating Thickness Standards

  • What is the function of PCWI Calibration Standards?

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

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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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  • 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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  • How many plates are on a Coating Thickness Standard?

    One zero plate and four coated plates, or one zero plate and two coated plates.

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  • What is the substrate material used?

    Ferrous – Steel, Non-Ferrous – Aluminium

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  • Is the substrate material the same on the one standard?

    Yes, the sets are entirely ferrous or non-ferrous.

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  • Why are four coated reference plates and one zero used?

    Coating Thickness Gauges are designed to be accurate through a wide range of thicknesses. To verify this it is advantageous to check and calibrate across the range.

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  • What are the specifications for PCWI’s plates?

    Plate size: 35 x 35 x 2mm (coatings up to 550µm), 43 x 43 x 2mm (coatings above 550µm)

    Base material: Steel (Ferrous), Aluminium (Non-Ferrous)

    Thickness material: Epoxy (up to 550µm), Acrylic (above 550µm)

    Resolution: 0.01µm

    Area of measurement: Centre single point of coated plate (not including the label)

    Weight: 211g (heavy duty example set)

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  • What are some example Coating Thickness Standard sets available?

    For Heavy Duty Coating: 0, 75, 150, 250, 500µm
    For Powder Coating: 0, 35, 75, 125, 175µm
    For Galvanising: 0, 50, 80, 125, 200µm
    For Plating & Anodising: 0, 10, 15, 20, 40µm
    For Ultra-high Builds: 0, 750, 1500, 2500, 5000µm

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  • Do PCWI manufacture different Standards?

    Yes, for some Companies we supply private label Coating Thickness Standards.

    There are set up costs involved in supplying private label Standards.

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  • Can I choose the coating thickness sizes I want?

    Yes, talk to one of our Professional Sales Team.

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  • How are the Standard sets packaged?

    All Standards are packaged in a durable plastic folder and then into a clear dust cover.

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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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  • Are replacement plates available if required?

    Yes, zero plates and reference plates are available- only necessary unless heavily scratched, dented or if the zero plate is corroded.

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  • What do the Coating Thickness Standards comply to?

    Australian Standard AS3894.3 – 2002

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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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  • What industries typically use PCWI Calibration Standards?

    All Industries applying surface coatings when coating depth is critical and requires test measurement by gauges i.e. Automotive, Aviation, White goods, Coating Applicators, Maintenance and quality control engineers, Quality control inspectors, Coating thickness gauge manufacturers (private labelling available) etc.

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  • What advantages do PCWI Calibration Standards have over Certified Films?

    Films cannot be recertified, are expendable and relatively expensive. Technically, 3894.3 – 2002 does not recommend the use of films in the calibration of manual magnetic gauges, as films tested during the writing phase caused the magnet to lift off prematurely.

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