Deister Electronic GmbH MODEL240 用户手册
GE-Interlogix-CASI
Model-240 Proximity Reader
9/17/2002
Page 3 of 4
Installation Considerations
1)
Installation of the Model 240 reader on metal
The table below shows the expected read range reduction when a Model 240 reader is
mounted onto a metal plate or wall.
mounted onto a metal plate or wall.
Distance
Reading distance
No metal plate
100 %
1.78 inch (4.5 cm) use 4 Surface
Mount Extension plates
100%
1.06 inch, (2.7 cm) use 3 Surface
Mount Extension plates
85 %
0.70 inch (1.8 cm) use 2 Surface
Mount Extension plates
70 %
0.35 inch (0.9 cm) use 1 Surface
Mount Extension plate
50 %
Reader placed on metal wall
10 %
2)
Installation of two Model 240 readers side by side
Read range is not affected if the center-to-center distance between two readers is equal to or
greater than 6-inches (15 cm). If the distance between the two readers is less than 6-inches
(15 cm), field interference between the two readers may result in the creation of a dead spot
in the badge read field.
Attention
Two readers may simultaneously read the same badge or tag if the distance between the two
readers is less than 12-inches (30 cm), center-to-center.
greater than 6-inches (15 cm). If the distance between the two readers is less than 6-inches
(15 cm), field interference between the two readers may result in the creation of a dead spot
in the badge read field.
Attention
Two readers may simultaneously read the same badge or tag if the distance between the two
readers is less than 12-inches (30 cm), center-to-center.