Accuracy is Everything

Your business relies on barcodes for efficiency, productivity, and customer satisfaction. Barcodes that are not printed accurately can cost you time and money. You need barcodes that scan the first time, every time, throughout the supply chain to the point-of-sale.

Verifiers + Test Cards = Barcode Accuracy

Barcodes are required to be precisely printed, following a set of rigorous parameters, and unfortunately when they’re not, it may be impossible to detect problems with the naked eye. That’s where barcode verifiers come in. Although verifiers seem like every other scanner around, they actually perform very sophisticated tests on barcodes and report on the quality of the printed symbol. These machines (verifiers) must be kept maintained and calibrated to ensure the values they report are accurate.

New GS1 US Calibrated Conformance Test Cards Features

The test cards consist of a series of barcodes each intentionally printed with unique errors. If your verifier can spot them, your verifier can be trusted to function with accuracy. The 8 flawed barcodes are made up of:

  • Quiet Zone infractions
  • Defect symbols to reflect both 'voids' and 'spots'
  • Decodability symbols to reflect both edge to similar edge bar flaws
  • Low Modulation symbol to reflect loss of symmetry in reflectance through the symbol
  • Low contrast symbol

1D Judge®

The 1D Judge was built under the guidance of the GS1 Barcodes and Identification Technical Group (BCIDTG). Test cards verified by the 1D Judge (which is more accurate than commercially available verifiers) are used to test the calibration and accuracy of your verifier. The 1D Judge and the 1D Calibrated Conformance Standard Test Cards maintain adherence to ISO/IEC 15416, ISO/IEC 15426-1, and GS1 General Specifications.


No! These cards are made using specialized materials and techniques to ensure their quality and accuracy. Any copies that are made would degrade this quality and accuracy, making them unacceptable for use. Any copy of the card is not considered a reliable reference to perform testing.

The Test Cards are made using specialized materials and equipment. The processes and procedures to create, test, and calibrate them is very precise and labor intensive. The pricing of these cards is consistent with (if not lower than the cost of the years of development of both the machine and the cards) comparable Test Cards used in the optics industry or precision calibration tools used in other industries.

Frequency of use can either be recommended by your quality control department based upon your firm’s normal calibration and/or traceability procedures or by the manufacturer of your verifier. Minimally, you should use it whenever parameters change such as you power off and on, or you close down your verifier’s software and then re-open it, or if you have doubts about the accuracy of your device.

Under normal, nondestructive use, the cards should last for a period of two years from the time the Test Card is put in service. If the package seal is intact, the card has not been used, and it has been properly stored, the cards should be good for 4 years (2 years in proper storage followed by 2 years of use). Once in use, replacement should be made no less than one time per two-year period. If you use excessive pressure on verifier parts that contact the Test Cards, you may produce light scratches and reduce the effectiveness of the card. Anytime you see light lines or streaks that cannot be removed by the recommended cleaning procedure, your card’s integrity may be compromised. To ensure the longevity of the Test Cards, make sure that verifier bases, wands, and other parts that contact the cards are clean. As long as your verifier produces consistent results within the tolerances specified by the verifier manufacturer as described in FAQ #2, any perceived small scratches should not be an issue. If the scratches and soiling of your card make it more difficult to collect a measurement or degrades the measurement beyond the verifier manufacturer’s specified tolerance, you could have a problem with your Test Card and/or your verifier. If this occurs, it will be necessary to replace the card. With a new Test Card in hand, immediately test your verifier to make sure it is still functioning within the tolerances.

Your verifier manufacturer can assist you in determining how to best use the card for training new or checking existing operators. The Test Card when used as a training tool can be invaluable to help a user to learn the technique needed to achieve an accurate scan. This is especially true when using a verifier that requires the user to move the scanning head (mouse or light pen) across a symbol. Once an experienced user has determined the accuracy of the verifier by using the Test Card, a trainee can attempt to match closely the values written in on the card as he or she (the trainee) verifies those symbols. Care and attention should be given to the speed and consistency with which the scan head is passed over the symbols.

Yes, certificates of conformance and traceability are shipped with each Test Card. These documents provide traceability to the National Institute of Standards and Technology (NIST) or other national standards bodies.

For the particular Test Card you plan to use, pay close attention to the aperture size specified on card either at the top of the card or in the lower left hand corner. We have designed the aperture size to match the most common printing densities for the symbology selected.