User's Manual

• Mobile Devices: a mobile device is defined as a transmitting device designed

to be used in other than fixed locations and to be generally used in such a way

that a separation distance of at least 20 centimeters is normally maintained

between the transmitter's radiating structures and the body of the user or

nearby persons. Transmitters designed to be used by consumers or workers

that can be easily re-located, such as a wireless modem operating in a laptop

computer, are considered mobile devices if they meet the 20 centimeter

separation requirement. The FCC rules for evaluating mobile devices for RF

compliance are found in 47 CFR §2.1091.

• Portable Devices: a portable device is defined as a transmitting device

designed to be used so that the radiating structure(s) of the device is/are within

20 centimeters of the body of the user. Portable device requirements are found

in Section 2.1093 of the FCC's Rules (47 CFR§2.1093).

The CS231-2 RFID module with 4.5dBi antenna is considered a fixed installation as it

is used for the purpose of reading tags.

The FCC also categorizes the use of the device as based upon the user’s awareness

and ability to exercise control over his or her exposure. The two categories defined are

Occupational/ Controlled Exposure and General Population/Uncontrolled Exposure.

These two categories are defined as follows:

• Occupational/Controlled Exposure: In general, occupational/controlled

exposure limits are applicable to situations in which persons are exposed as a

consequence of their employment, who have been made fully aware of the

potential for exposure and can exercise control over their exposure. This

exposure category is also applicable when the exposure is of a transient nature

due to incidental passage through a location where the exposure levels may be

higher than the general population/uncontrolled limits, but the exposed person

is fully aware of the potential for exposure and can exercise control over his or

her exposure by leaving the area or by some other appropriate means.

Awareness of the potential for RF exposure in a workplace or similar

environment can be provided through specific training as part of a RF safety

program. If appropriate, warning signs and labels can also be used to establish

such awareness by providing prominent information on the risk of potential

exposure and instructions on methods to minimize such exposure risks.