Omron V680-HAM91 User Manual page 148

Section 7
Appendices
V680-D1KP66T-SP
Effect of Metal on Back of RF Tags (Reference)
The V680-D1KP66T-SP communications distance is reduced if there is any metallic material on the
back of the RF Tag. If the RF Tag is mounted on metallic material, insert a non-metal spacer (such as
plastic or resin).
The relationship between the distance from the RF Tag to the metal surface and the communications
distance is shown below.
● V680-HS52 and V680-D1KP66T-SP
(%)
100
90
80
70
60
50
40
30
20
10
0
● V680-HS63 and V680-D1KP66T-SP
(%)
100
90
80
70
60
50
40
30
20
10
0
● V680-HS65 and V680-D1KP66T-SP
(%)
100
90
80
70
60
50
40
30
20
10
0
RFID System
146
User's Manual
50
10 20 30 40 (mm)
Distance to metal (x)
10 20 30 40 50
Distance to metal (x)
10 20 30 40 50
Distance to metal (x)
Antenna
Metallic material
Antenna
Metallic
material
(mm)
Antenna
Metallic
material
(mm)
RF Tag
Metal on back
Y
Communica-
tions
distance
X
RF Tag
Metal on back
Y
Communica-
tions
distance
X
RF Tag
Metal on back
Y
Communica-
tions
distance
X