Test UHF RFID Read Range on Your Own Items

State the decision before measuring distance

Write the acceptance question as an operation: identify an item at an issue counter, inventory a particular storage arrangement or detect a linen item in a chosen handling state. Add the required reading area, allowed orientations and available observation time. Agree on how a missed item and an unintended read will be recorded before starting.

This is a suggested buyer-run field protocol. It contains no results from tests performed by this site, and it does not define a certification procedure. Your observations apply to the samples, equipment and arrangements you document. Keep that scope with the final decision so a later operator does not interpret the pilot as an unrestricted model guarantee.

Voyantic distinguishes walk-away results from laboratory characterization. A field result combines the reader, alignment and surrounding environment. Use a field trial to answer the installed-workflow question, and obtain calibrated laboratory measurements separately when the procurement decision requires them.

Prepare samples and a stable setup

Give each specimen a distinct identifier and maintain a list of the identifiers expected in each trial. Verify the samples before mounting, then record the installed position and fixing method. If a sample has an unexpected identity, fix the inventory record before collecting distance observations. Otherwise a filter or data-mapping problem may look like a radio failure.

Use the intended reader and antenna where practical. Save the reader configuration, including its country setting and inventory parameters. Record the antenna model, polarization, cable type and length. Follow the reader's approved installation instructions. Do not substitute an undocumented transmitter setting simply to produce a longer result.

Select a representative item and location. Describe the asset material, surface finish and orientation. For a metal-mounted FR4 candidate, keep the actual mounting method with the record. For a textile laundry candidate, describe the attachment and item condition. These are different assemblies even if the reader is unchanged.

Keep this setup record

Keep this setup record

Field	Record before the first trial	Reason to retain it
Sample identity	Model, specimen label and expected identifier	Distinguishes samples and missing items
Installed item	Material, finish, size and placement photograph	Describes the tested assembly
Reader configuration	Model, firmware, country and saved settings	Makes later repetitions interpretable
Antenna path	Antenna, polarization, cable and port	Identifies the actual equipment arrangement
Geometry	Antenna and tag positions, reference points and orientation	Makes distance and direction repeatable
Observation rule	Fixed interval and definition of a successful detection	Prevents differing trial durations
Operating context	Grouping, neighboring objects and movement	Keeps the result tied to the use case

Use named reference points for distances. Measure from the reader antenna position you have defined to the tag position you have defined. Do not switch between the reader enclosure, the front of the asset and the tag center during the same comparison. Photograph the geometry and label the reference points so another person can reconstruct it.

Choose an observation rule you can repeat

Decide the observation interval from the operation you need to support. A stationary inventory check and a moving handover have different timing requirements. Use the same interval for candidate comparisons within that operation, and record it in every result. This guide does not prescribe one interval that suits all readers and workflows.

For a stationary trial, start a fresh observation at the marked position and record whether the expected identifier appeared during that window. Save the inventory log with a timestamp. Keep repeat reads if they are useful, but distinguish them from unique item detections. A high count for one sample is not evidence that all expected samples were read.

Choose and document a repetition plan before comparing candidates. Run each candidate through that plan, including unsuccessful observations. Where multiple specimens are available, retain the specimen identity instead of combining every result under the model name. Describe the pilot size honestly; it does not establish the distribution of future production batches.

Map positions rather than chasing the last read

Begin with a position where the reference sample is detected repeatably. Mark a series of positions that includes the intended operating region and its boundaries. Keep height and orientation defined as you move through them. The useful output is a position record showing where the operation succeeds and fails under the selected observation rule.

For every position, run the same observation procedure. If a farther position succeeds after a nearer one fails, retain both observations. Do not redraw the result as a smooth radius. Move back to a reference position periodically and check whether its behavior changed; unexpected drift makes the intervening comparison uncertain.

If you are exploring the farthest possible isolated read, label that result explicitly as exploratory. Do not use it as the acceptance distance for a moving population. The coverage improvement guide can help select a controlled follow-up when the position map shows gaps.

Include the permitted orientations

List the orientations an operator or process can actually produce. Use recognizable labels such as face toward antenna, reverse face and a defined side view. Photograph them. Keep each label associated with its observations instead of reporting only the favorable face of the item.

Times-7 describes polarization as relevant to tag alignment. Record the antenna choice, but let the trial establish whether the installed item works across your permitted presentations. Do not assume a polarization label means every asset orientation has been covered.

For a tag-format comparison, keep the location and orientation common where they fit. If a candidate requires a different placement, note that the trial compares assemblies. Use the on-metal format checklist to identify the geometry or fixing differences that must remain visible in the result.

Repeat the trial with normal grouping and movement

After isolated-item observations, assemble the ordinary population. Keep the expected identifier list and compare it with the detected list after each run. Include the normal container, nearby items and movement. Voyantic's tagged-item guidance describes population testing as relevant when items are used or stored close together; a single-item check leaves that question open.

For a moving trial, define the path and presentation rule. Record deviations from that rule instead of silently repeating an unsuccessful pass until it works. Separate misses within the target population from identifiers detected outside it. In the final decision, explain whether special handling is required and whether that handling can be maintained.

Write one result row per observation

Use columns for run label, specimen identifier, position, orientation, reader configuration label, observation interval, detected or missed, unintended identifiers and notes. Keep the raw inventory file alongside the rows. Describe interventions such as reattachment or a moved antenna immediately, because they change the tested arrangement.

Summarize the required operating region, the orientations included and the outstanding failures. Report the sample count and repetition plan you used. Do not replace the evidence with “works well” or a single advertised distance. If the result prompts a configuration change, save it under a new label and repeat the baseline for comparison.

When this does not apply

This protocol does not measure calibrated tag sensitivity, prove compliance with a radio regulation or provide a statistical guarantee. It also does not qualify the bond, wash life or chemical resistance. Define those requirements separately and use the mounting checklist when an attachment question remains.

When testing across markets, review the regional frequency comparison and the equipment's approved configuration. Preserve each market setup as a separate trial. To begin the comparison, request a test kit with your items, reader configuration and acceptance question.