FT-02: Reading distance
<!-- Generated from field-tests/suite.json by tools/field_tests.py. Edit the JSON, not this file. -->
Category: Distance · Time: about 10 minutes · Run it and see results: https://openckey.org/tests/test?id=FT-02
What it checks
A 2-inch CKey reads from arm's length, about 60 cm.
Why
Posters, shelf labels and screens are read from further away than a business card. Distance shrinks the code in the image exactly as print size does, so this shows how far the size results stretch.
Test codes
Print or open the sheet at https://openckey.org/tests/sheet?id=FT-02. It is drawn by the CKey web SDK from the values below.
| Code | Size | Version | Level | Layout | Style | Holds |
|---|---|---|---|---|---|---|
| A | 2.0 in | smallest that fits | M | standard | plain | https://openckey.org/t/FT02-A |
Set up
- Print the test sheet at 100% scale and check that the code is 2.0 inches (51 mm) wide.
- Tape it to a wall at eye level in even indoor light.
- Mark distances of 15, 30, 60, 100 and 150 cm from the wall.
Steps
- Stand at each distance in turn, holding the phone square to the sheet.
- Allow up to 5 seconds at each distance without zooming.
- Record whether it read.
What to record
- Read within 5 seconds, boolean, required. For each of: 15 cm, 30 cm, 60 cm, 100 cm, 150 cm.
Every report also records the device, operating system, reader and its version, and the printer or screen.
How to grade it
- Pass: It read at 15, 30 and 60 cm.
- Partial: It read at 15 and 30 cm but not at 60 cm.
- Fail: It did not read at 30 cm.
Report a result
- On openckey.org: https://openckey.org/tests/test?id=FT-02, with optional photos.
- On GitHub: open a field-test report and choose FT-02.
Both are published together at https://openckey.org/tests and as JSON at https://openckey.org/api/field/results.