Experience shows that fingers are best suited in the following order: First middle finger, Second index finger, Third ring finger. The thumb and little finger should not be used. Every person has better and less suitable fingers. The writing hand is advantageous because you have more feeling in this hand (right-/left-handed). Please choose a clean finger without injuries or abrasions. The sensor cannot detect a groove structure that is too flat due to wear or genetic predisposition. Beautiful and well-visible groove structure facilitates recognition. In children, the index finger or the finger that the child intuitively uses himself works best. Use the fingers that are most comfortable to use and quickest to recognize.
For comfortable ambidextrous operation and as a precautionary measure in case of injuries, one finger of both hands should be stored. In the case of fingers that are not as easy to scan as small children, elderly people or craftsmen may have, the same finger should be scanned in several memory locations. 99 finger storage locations are available with ekey home/ekey multi. Basically, it is better to scan one finger several times than several fingers once each. This increases the chance of detection and the system works better in borderline situations (dry fingers, skin cream or sweat after exercise) or if the system is not operated properly.
With the 1-relay variant, you simply use F1-F5 for the first finger and F6-F0 for the second finger at the same user memory location. This means that you have used up 5 reference scans each and thus a total of 10 memory locations.
Child’s fingers: In principle, children’s fingers function from about school age. However, under certain circumstances it is possible to store younger children using the multiple storage described above. The prerequisite for correct operation is the specified mounting height for IN, WM and OM. If the LED flashes red immediately without previously flashing yellow when the finger is drawn over the sensor, the finger was not drawn correctly over the sensor or the wait was too long. As soon as the finger is placed on the sensor, it must be pulled down immediately. The software interrupts the scanning process and signals this by a short, red flash of the LED.
Example Person 1:
- Memory location 1, F3 for the left middle finger
- Memory location 1, F8 for the right middle finger
For control units without multi-line display, a list of recorded fingers is useful.