BioSIMKey - ADT60 Reference Manual
rev 1.0, April, 2002
Advanced Card Systems Ltd.
Page 26 of 26
APPENDIX D: RECOMMENDDED DEVICE CLEANING PROCEDURES
D.1 Introduction
Key elements of image quality are the consistency within the actual image and the
background of the image. Software algorithms are more accurate and generally faster when
the image quality is consistent and the background has not changed dramatically. Dirty
residue, oils, or other material on the surface of the TouchChip may obscure the image,
leaving parts of the image unrecognizable, or creating false features within the image.
Regular use of the TouchChip may leave residue or other foreign materials on the surface.
Performance degradation in terms of False Match and False Non-Match are indicative of
such problems.
It is recommended that the sensor be visually inspected and periodically cleaned as
described in section D.2. It is also recommended that before each touch, the sensor be
cleaned as described in section D.3.
D.2 Periodic Cleaning
Dampen a lint-free cloth or cotton swab with alcohol or acetone. Gently rub the cloth across
the sensor surface in a left and right direction. Move slowly down the sensor to cover the
entire surface area. Repeat this process 4 times. Visually observe that no residual solution
remains on the sensor. After performing the periodic cleaning operation, a surface
conditioning is suggested to obtain the maximum performance from the TouchChip sensor.
Dampen a lint-free cloth with fragrance-free moisturizing lotion, and gently rub the cloth
across the sensor. Make sure that all the lotion will be removed as completion of the cleaning
process.
Acid-based fluids, and abrasive materials are not recommended for cleaning the TouchChip.
D.3 User Cleaning
Before each authentication, it is recommended that the user simply wipe the sensor with
her/his finger, and then position the finger for the authentication. With this action we assure
that residue from previous usage will be removed hence giving the best surface conditioning.
Copyright
Copyright by Advanced Card Systems Ltd. (ACS) No part of this reference manual may be reproduced or transmitted in any from without the expressed,
written permission of ACS.
Notice
Due to rapid change in technology, some of specifications mentioned in this publication are subject to change without prior notice. Information furnished is
believed to be accurate and reliable. ACS assumes no responsibility for any errors or omissions, which may appear in this document.
