NEC ShieldPRO N22A, Руководство пользователя, Страница: 71 / 173

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2.11 FINGERPRINT SENSOR (APPLIED TO FS-N22 OF
FINGERPRINT SENSOR INSTALLATION MODEL ONLY)
N22A of fingerprint sensor installation model can register fingerprint information to enhance
security.
N22A of no fingerprint sensor installation model cannot be equipped with the fingerprint sensor
later.
The fingerprint sensor is intended to read fingerprints. You may pull the registered finger with it
slipped on the sensor to allow the fingerprint to be read.
Security can be enhanced by registering fingerprint information.
See
“
Fingerprint Authentication Utility
”
in
“
Chapter 5 Installing OS and Applications
”
for details.

Proper finger movement
The fingerprint sensor reads a fingerprint in the range from the top joint to the tip.

Characteristics of fingerprint
It is recommended to register the fingerprints of more than one finger to be registered
easily.
It may be hard to register fingerprint in the following cases:

Grooves of fingerprint are buried with much
sweat and/or skin oil,

Finger is extremely dried,

Fingerprint is too small,

Fingerprint is too large,

Fingerprint has no whorls,

Hand is in bad condition, or

Fingerprint is weak due to wear.

Fingers are much sweat and/or oily in the
summer season,

Fingers are extremely dried in the winter
season,

Fingers are rough or injured, or

Fingers have changed its shape rapidly.
Wipe a finger of sweat and/or skin oil completely or put proper cream on a rough or dry
finger, as necessary.
If your fingertips are small, register as large a finger as possible, i.e., a thumb.
A finger of difficult registration is apt to cause discrepancies in verification.
If all fingers are hard to be registered, registering a specific finger several times can reduce
discrepancies in verification.
Sensor
Put the registered finger
on the sensor with the
top joint located at this
line.
Sensor
(1) Put the registered finger on the
sensor with a line just above the top
joint located at the sensor. Start
moving the finger after a while.
(2) Pull the finger straight and slowly
in parallel with the sensor while
the finger is contact with the
sensor. Note that the finger may
not be detached from the sensor.