User Guide

MS-3000 MicroStar Reader
Unit 17 Park Farm Industrial Estate 01815-001 Rev. H
Buntingford, Herts SG9 9AZ UK
TEL: + 44 (0) 1763 273 243 FAX: + 44 (0) 1763 274 106
Web: www.kerisys.com E-mail: [e-mail] Page 8 of 8
Quick Start GuideMS-3000
Problem Probable Cause Corrective Action
The reader has a
short read range.
1. The reader's
controller is not
properly grounded.
• Ensure there is a quality earth ground
connection made to the controller. Refer to
the controller's documentation for specific
information regarding the earth ground
connection.
2. The shield wire for
the reader's cable
has opened
somewhere between
the reader and the
controller.
• Verify the shield line from the controller to
the reader is one continuous, connected line.
Refer to the controller's installation
documentation and verify the shield line is
correctly connected to the controller.
3. The reader is
mounted too close to
a device that
radiates
electromagnetic
interference.
• Devices such as computer monitors radiate
electromagnetic interference that affects read
range. When possible, relocate either the
reader or the device to provide a greater
distance between the two.
4. The controller is
mounted too close to
a device that
radiates
electromagnetic
interference.
• Devices such as computer monitors radiate
electromagnetic interference that affects the
performance of the receiver board on the
controller. When possible, relocate either the
controller or the device to provide a greater
distance between the two.
5. The reader is
powered by a
switching power
supply.
• Switching power supplies are EMI sources.
Change to a linear, regulated power supply.