Omron V680 Series User Manual page 136

Section 7
Appendices
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.
Reduction in Communications Distance for V680-D2KF52M Angle
V680-HS51 and V680-D2KF52M
V680-HS51 and V680-D2KF52M
V680-HS52 and V680-D2KF52M
V680-HS52 and V680-D2KF52M
V680-HS63 and V680-D2KF52M
---: Measurement is not possible because Antenna and ID Tag would strike each other.
Measurement Conditions
V680-HS51 and V680-D2KF52M
Steel
Antenna
Toothed
washer
V680-HS52 and V680-D2KF52M
Antenna
V680-HS63 and V680-D2KF52M
Antenna
RFID System
134
User's Manual
(Metal on back: Steel)
(Metal on back: Steel)
Nuts
ID Tag
Non-metallic
θ
material
ID Tag
Non-metallic
θ
material
ID Tag
Non-metallic
material
θ
ID Tag angle (θ°)
0 10
−2%
0%
0% 0%
0% 0%
−2%
0%
0% 0%
V680-HS51 and V680-D2KF52M
Antenna
Toothed
washer
V680-HS52 and V680-D2KF52M
Antenna
20 30
−6%
-−
−7%
0%
−2%
0%
−7%
---
−1% −4%
(Metal on back: Steel)
Steel
Nuts
ID Tag
Non-metallic
θ
material
(Metal on back: Steel)
ID Tag
Steel
θ
40
−22%
−30%
−5%
---
−9%