ZKTeco US922 User Manual

User Guide

US922 Series | Time & Attendance Terminal

This guide provides User instructions only. For information regarding actual installation, refer to the US922 Installation Guide

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User Guide Disclaimer

All functions described in this document are current as of January 2009. Every eort has been made to ensure the information in this document is complete and

consistent with the US922 you have purchased. Since the US922 is constantly being improved, it is remotely possible that this document may not precisely coincide

with the US922 you have purchased. ZK Software will not assume liability for any direct or indirect nancial loss resulting from any inaccuracies or omissions found

in this document.

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Step 1: Install the US922 and power it up.

Step 2: Enroll users by registering his/her ngerprints or passwords.

If the US922 is operating in stand-alone mode, (where no 3rd party access con-

trol panel exists) assign users’ security privileges directly on the US922.

Note: If using the US922 with a 3rd party Wiegand access control panel, users’

security privileges will be maintained by the access control panel and NOT the

US922.

Step 3: After enrolling user(s), verify that his/her enrolled ngerprint or password

is recognized by the US922.

Step 4: Congure the US922 communication settings and then download the

users’ newly enrolled ngerprints from the US922 onto a computer. Data can be

transmitted via TCP/IP or by using a USB ash drive.

Step 5: Verify that US922 displays the correct day and time

Note: Always back up the ngerprint templates on a computer or removable

media source. Having a “template backup” can potentially save you a lot of time.

If the US922 fails or is vandalized, having a “backup” eliminates the need of hav-

ing to re-enroll all your users.

Operating | Brief Overview

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Prior to operating the US922, it is essential to understand how ngerprint recognition

technology works.

Adding and verifying ngerprints are the core functions of the US922. Once you ac-

quire a thorough understanding of ngerprint recognition technology, you will nd

your experience with the US922 to be very productive and rewarding

How Fingerprint Recognition Technology Works

All ngerprints contain a number of unique physical characteristics called minutiae.

Minutia includes certain visible aspects of ngerprints such as ridges, ridge endings,

and bifurcation (forking) of ridges. Most of the minutiae are found in the core points

of ngerprints, which are found near the center of the ngerprint on the eshy pad

of the nger.

Figure below shows the positions of core points within ngerprints. The core points

are represented by the green dots in the gure below

Fingerprint Recognition Technology

Island Dot Bifurcation Ending Ridges

A core point is dened as the topmost point on the innermost upward recurring

ridge line.

A user is considered “enrolled” in the US922 after his/her ngerprint(s) or password

has been successfully registered in the US922.

When the user places his/her nger(s) on the US922 ngerprint sensor during the

enrollment process, the US922 takes a picture of that user’s nger’s key minutiae

points. Then the US922 uses its proprietary mathematical algorithm and converts

that picture into a unique mathematical template which is comparable to a 60-digit

password. This unique template is then encrypted and stored in the US922 database

IMPORTANT NOTE

Privacy issues should never be a concern when using the US922 because NO REAL

IMAGE OF A USER’S FINGERPRINT IS STORED. ONLY the minutiae-based tem-

plates are stored.

Each time a user’s ngerprint is scanned, the US922 searches its database for a

matching ngerprint. If the US922 nds the user’s ngerprint, then his/her “atten-

dance/door access” is recorded in the US922 “audit log” and will be noted in subse-

quent reports.

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Getting Good Fingerprint Images

The quality of ngerprint images is relative to the number of minutiae points cap-

tured by the US922’s sensor. Fingerprint images not possessing an adequate number

of minutiae points may be unreadable. It is advised to issue a secret password for

those users whose ngerprint images lack sucient minutia points and cannot be

read by the sensor. Also, you may consider purchasing an US922 with an integrated

card reader if you do not intend to assign passwords

Figure A-2 shows poor-quality ngerprints, characterized by smudged, faded or dis-

torted areas on the ngerprint. These conditions can be caused by excessive dryness,

wetness, insucient pressure or scarring of the skin at the ngertip..

Dry Wet Scarred

The US922 ngerprint matching algorithm is capable of extracting the correct minu-

tiae without the benet of a perfect print. However, the positioning of the nger and

the moisture and pressure of the ngerprint are signicant factors to consider when

it is placed on the sensor. This will help achieve a good consistent ngerprint match.

Correcting Wet or Dry Fingerprint Images

When the temperature is rigid or when hands have just been washed, ngerprints

often become very dry. In this case, the user should moisturize his/her ngerprint

simply by breathing on the eshy pad of his/her ngertip prior to placing his/her n-

ger on the sensor. The moisture from his/her breath should improve the recognition

of his/her ngerprint.

Conversely, if the ngerprint is too wet, the ridges and valleys are rendered indistin-

guishable. The lack of recognizable minutiae causes wet ngerprints to be rejected

by the US922. This can be remedied simply by swiping the nger on a clean dry

towel or cloth.

How much pressure is required for a good-quality
ngerprint?

If too much pressure is applied when pressing down on the sensor, the nger’s

ridges become pressed together and create an unrecognizable image. Applying too

much pressure (similar to ngerprints that are too wet) will create a “blurred” image

which the US922 sensor might not recognize.

If too little pressure is applied, the resulting image will be similar to the dry ngerprint

and unidentiable. Issues related to moisture and pressure can easily be addressed

with practice and users getting a feel of the sensor.

Be sure to maintain contact with the ngerprint sensor for 2 full seconds, until

the US922 responds.

The US922 has both audio and visual indicators which respond when the US922

senses a nger.

Fingerprint Recognition Technology

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Proper Finger Placement

The user’s nger should completely cover the sensor. The nger should be placed at

and in the center of the sensor. The nger should cover at least 80% of the sensor as

shown below

Identity Verication

The US922 will NOT record an employee’s attendance OR allow door access UNTIL

the individual’s identity is veried.

The US922 uses various methods to verify a user’s identity:

• Fingerprint Matching

• Password Matching

• Card Matching (optional)

Fingerprint Matching

The US922 supports two methods of ngerprint matching, 1:N and 1:1.

1: N Fingerprint Matching

When using 1:N Fingerprint Matching, the US922 will place the ngerprint (“1”) in its

temporary memory and then compare it to ALL (“N”) ngerprint templates stored in

the US922 database (up to 2800 templates).

By using 1:N matching, the user enjoys the convenience of not entering his/her User

ID number prior to placing his/her nger on the sensor. 1:N is principally a 1-touch

matching. It is the FASTEST and EASIEST method of ngerprint matching.

The nger should NOT be placed in the following positions:

Upright

Sideways

Skewed

Partial

Fingerprint Recognition Technology

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Start from the Check/Clock-

In Screen:

If the US922 responds

“Please try again,” the pro-

cess must be repeated.

1: 1 Fingerprint Matching (ID. NO +ngerprint)

When too many users’ ngerprints are not easily recognized by the US922, it can be

set to perform 1:1 ngerprint matching.

1:1 matching requires an added step of entering the user’s ID. number rst. However,

1:1 matching is more consistent than 1:N matching.

How to Use 1:1 Fingerprint Matching

PRIOR to placing his/her nger on the US922 ngerprint sensor, the user must FIRST

enter his/her ID number and press . If the ngerprint template registered with

his/her user ID number (“1”) matches his/her nger (“1”), the user’s identity has

successfully been veried using 1:1 ngerprint matching.

From the Check/Clock-In

screen, properly place nger

on sensor.

When the US922 responds,

“Thank you,” the user has

successfully veried his/

her identity by using 1:N

matching.

How to Use 1:N Fingerprint Matching

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If ngerprint matching

becomes too problematic

for too many users, they can

register with passwords

instead of ngerprints.

How to Use Pass­word Matching

Start at the Check/Clock-In

Screen:

At the Check/Clock-In

screen, enter the employ-

ee’s User ID. number and

press

After a users ID number

is entered and the user is

NOT prompted to enter his/

her password (“PWD”), this

means that NO password

has been registered to that

ID number.

If the US922 prompts “Error Enroll NO(number)” ,this means the user has mistak-

enly entered an incorrect ID number. If this is the case, the user should reattempt

entering his/her correct user ID number.

After entering the user ID.

number, the user will enter

his/her password (“PWD”).

If the US922 responds with

“Thank You”, then the user

has successfully veried his/

her identity using Password

verication.

Password Matching

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If the US922 prompts the

user with “Error Pwd”, then

the user should re-attempt

entering his/her correct

password.

If the US922 veries the us-

er’s identity BUT determines

the user is NOT permitted

door access AT THAT PAR-

TICULAR TIME, the door will

NOT release and the US922

displays the following:

Door-Access Con­siderations

The US922 is designed to

work as an Access Control

terminal and a Time &

Attendance recorder.

Door Access Control deci-

sions are based upon “Who”

the user is and “When” the

user is permitted door

access.

The US922 will verify “who” the user is. When the user is granted door access, it can be

decided EITHER by the US922 OR a 3rd party Access Control panel.

If the US922 validates the identity of the user AND determines the user is permitted

door access AT THAT PARTICULAR TIME, the door will release and the US922 displays

the following:

Password Matching