Allflex AFX-100 Instrukcja Użytkownika Pobierz pdf (Strona 11)

Rev Australasia V2.3 12/04

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Raised section

is the antenna

coil

Mechanical Installation

Choosing an Installation Site

Several factors should be considered when selecting and / or constructing an installation site

in order to ensure optimum performance of the Panel Reader. Prior to making structural

changes to the target installation site, the user should temporarily install the reader in a

manner that as closely as possible simulates the permanent installation.

(a) Metal surfaces and structures - The Panel Reader uses radio frequency techniques to

communicate with the eartags. Metal material, especially metals that are magnetic can

seriously degrade the read range performance through absorption and deflection of the

Panel Reader’s electromagnetic fields.

The reader cannot usually read through sheet metal. However, in some cases this is

possible and the reader can usually be configured to read through metal pipes and still

achieve good read distances as demonstrated in the images below.

Note that in the images above, the reader has literally been tied directly to the metal bars.

In a practical installation, Allflex would recommend that you use a piece of marine

plywood (or similar) in between the metal bars and the reader so that the reader is

protected from direct impact from horns etc. Also in some cases, when mounting through

steel bars, it is necessary to mount the antenna away from the bars. This depends upon the

type of crush and the configuration of the pipe work.

If you do intend to mount the antenna to read through metal pipes, position the antenna so

that the antenna coil, (the raised section) does

not sit directly above the pipe work. Try and

position the antenna so the coil is offset / spaced

between the pipe work as shown.

Another issue to consider that will dramatically

effect the performance of the reader, is to avoid

positioning the antenna so that metal bars run

parallel to the antenna coil forming a frame

closely around the coil.

Hold the antenna in place or temporarily tie it in

the desired location. Check the current

displayed on the ammeter. Ideally, it should be

around 1 amp. You may find that by simply

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Allflex AFX-100 Instrukcja Użytkownika Strona 11