Omron V680-HAM42-DRT User Manual page 111

V680-D2KF67
Effect of Metal behind Tags (Reference)
The V680-D2KF67 communications distance is reduced if there is any metal material behind the Tag.
● V680-HS52 and V680-D2KF67
(%)
100
90
80
70
60
50
40
30
20
10
0 10 20 30
Distance to metal (x)
ID Tag
Antenna
Y
Communica-
tions
distance
● V680-HS65 and V680-D2KF67
(%)
100
90
80
70
60
50
40
30
20
10
0 10 20 30
Distance to metal (x)
Antenna
ID Tag
Y
Communica-
Metal
tions
distance
● V680-HS63 and V680-D2KF67
50 (mm)
40
Metal on back
X
50
40 (mm)
Metal on back
X
(%)
100
90
80
70
60
50
40
30
20
10
0 10 20 30
Distance to metal (x)
ID Tag
Antenna
Y
Metal on back
Communica-
Metal
tions
distance
X
Section 6
Appendices
40 50 (mm)
RFID System
User's Manual
109