User's Manual

157
RFID System
User's Manual
Section 7 Reference Data
Section 7
Chemical Resistance
 V680-D8KF68/-D32KF68
 Effect of Metal behind Tags (Reference)
The transmission distance will be reduced if there is metal in back of
a Tag. When mounting on a metal surface, use the special
Attachment (V680-A81) of another sales or insert a non-metallic
spacer (e.g., plastic, wood, etc.).
The following diagrams show the relationship between the distance
between a Tag and metal surface and the transmission distance. The
Attachment is 10 mm thick.
• Special Attachment (V680-A81) Installation Direction
M4 screw
Spring washer
Flat washer
• V680-HS63 &V680-D8KF68/-D32KF68
10 20 30 40
(mm)
0
50
70
Distance to metal (x)
60
40
30
20
10
90
(%)
100
80
The communications distance without metal is 100%
Antenna
When Attachment (V680-A81) is not used
When Attachment (V680-A81) is used
Atachment
Metal on back
Metal
Communica-
tions
distance
Y
X
ID Tag
• V680-HS63 &V680-D8KF68/-D32KF68
10 20 30 40
(mm)
0
50
70
Distance to metal (x)
60
40
30
20
10
90
(%)
100
80
The communications distance without metal is 100%
When Attachment (V680-A81) is not used
When Attachment (V680-A81) is used
Atachment
Antenna
Metal
Metal on back
Y
X
Communica-
tions
distance
ID Tag