Omron V670 Series, User Manual

Page: 135 / 143

9-5
When you install the tag, take into consideration the influence of back metal.
If there is any metallic material behind the tag, the communication range deteriorates. The characteristic of communication range dete-
rioration depending on the distance between the tag and back metal of tag (the same size as antenna) is shown below.
•
Model V670-H11 Model V670-D13F03
0
0
100
80
60
40
20
20 40 60 80 100
Distance between metal and tag (mm)
Communication range ratio (%)
0 20 40 60 80 100
Distance between metal and tag (mm)
Communication range ratio (%)
0
100
80
60
40
20
Antenna
Metal
Tag
Distance
between back
metal and tag
Communication
range
* Assume that the communication
distance without metal is 100%.
* Assume that the communication
distance without metal is 100%.
Metal: Aluminum
Metal: Iron
9-4 Influence of Back Metal of Tag (Reference)