Calibration

Calibration informs the verifier about the grey scale levels and pixel dimensions of the reader. This way, the verifier can report Symbol Contrast and X-dimension in true physical units.

For ISO compliant barcode verification, make sure that the verifier is in a calibrated state.

For Standards Based Grading, the verifier will not report all quality parameters without calibration.

In an uncalibrated state the verifier does not report:

  • Aperture and Symbol Contrast (SC) for ISO/IEC 15415/15416 applications
  • Minimum Reflectance (MR) for ISO/IEC TR29158 (AIM-DPM) applications

When the verifier is used in an uncalibrated state, neither the aperture nor Symbol Contrast (SC) for ISO/IEC 15415/15416 applications and Minimum Reflectance (MR) for ISO/IEC TR29158 (AIM-DPM) applications is reported.

Note: In an uncalibrated state, the verifier does not report aperture value, but uses the default aperture selection: Auto 80%.

To calibrate the DataMan 475:

  1. Click the Calibration icon in the top left corner in the TruCheck Verification window.

  2. Enter the Rmax and Rmin values from the calibration card.

  3. Click Center Target.

  4. A live image appears in the Calibration screen. Center the verifier over the Master Symbol on the Data Matrix symbol of your traceable calibration card.

  5. Click Start Calibration.

  6. The verifier goes through a series of lighting calibrations. After a successful calibration, the Calibration Complete window pops up:

    Tip: Click Discard Calibration to remove all calibration values and return the verifier to an uncalibrated state.

    Calibrate your verifier as needed to ensure accurate verification results:

    • Monthly calibration recommended: for laboratory or QA environment, which is free of dust, vibration, bright sunlight or oil particulates
    • Weekly calibration is recommended: for production environments, where contaminants exist

    • Custom frequency calibration recommended: where internal quality guidelines demand more frequent calibration

    Note: Store the calibration card away from direct light where contaminants do not compromise the calibration symbol.
    Tip: Enable a calibration reminder to alert you about the next scheduled calibration. After enabling the calibration reminder, set the number of days for prompting a calibration reminder.