Omron V680 Series User Manual page 127

Influence of ID Tag Angle (Reference)
Install Antennas and ID Tags as close to parallel to each other as possible.
Communications are possible even when an Antenna and an ID Tag are mounted at an angle, but the
communications distance will be shortened. The relation between the angle and the communications
distance is shown below.
Percentage of Change in Communications Distance for 680-D1KP52MT Angle
V680-HS51 and V680-D1KP52MT
V680-HS51 and V680-D1KP52MT
(Metal on back: Steel)
V680-HS52 and V680-D1KP52MT
V680-HS52 and V680-D1KP52MT
(Metal on back: Steel)
V680-HS63 and V680-D1KP52MT
---: Measurement is not possible because Antenna and ID Tag would strike each other.
Measurement Conditions
V680-HS51 and V680-D1KP52MT
Steel
Nuts
Antenna
Toothed
θ
washer
V680-HS52 and V680-D1KP52MT
Antenna
θ
V680-HS63 and V680-D1KP52MT
θ
Antenna
Metallic material
0
0%
0%
0%
0%
0%
ID Tag
Non-metallic
material
ID Tag
Non-metallic
material
ID Tag
Non-metallic
material
ID Tag angle (θ°)
10 20
−1% −5%
0% 0%
0% 0%
−6% −13%
−2% −5%
V680-HS51 and V680-D1KP52MT
Steel
Nuts
Antenna
Toothed
washer
V680-HS52 and V680-D1KP52MT
Antenna
Section 7
Appendices
30 40
−10% −15%
−4% −28%
−2% −6%
−25%
---
−9% −14%
(Metal on back: Steel)
ID Tag
Non-metallic
θ
material
(Metal on back: Steel)
ID Tag
Steel
θ
RFID System
User's Manual
125