Denso BHT-825QW User Manual download pdf (Page 218)

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2D Code Handy Terminal

5.3 Bluetooth

Wireless Communication

5.3.1 Usage Precautions

• It may be possible to avoid the easy occurrence of communication errors by pointing the right side of the

BHT (equipped with builtin antenna) toward the access point. This is because the radio waves of the 2.4

GHz waveband on which the BHT operates are emitted straight ahead and do not easily pass through

the human body and so on.

• Communication may not be possible when used in the vicinity of wireless devices, microwave ovens,

industrial heating equipment or high-frequency medical equipment operating on the same 2.4 GHz

waveband as the BHT.

• Communication may not be possible due to electromagnetic noise when the BHT is used in the vicinity

of household appliances such as computers or refrigerators.

• Communication may not be possible in the following locations.

In the vicinity of large metal objects or in places with high levels of metallic dust

Rooms surrounded by metal walls

Places subject to strong impact

• The possible communication distance between the BHT and other devices used is about 5m. Even if the

communication distance is within 5m, communication may not be possible depending on the other

device and the environment.

The possible communication distance may vary by individual BHTs. Although communication may be

possible on a BHT when the communication distance is longer than 5m, avoid operation of the BHT on

this basis.

− Point − Requests to System Designers

z Communication may not be possible depending on the environment in which the device is being

used. Ensure that problem-free communication is possible prior to use.

z Use a program capable of retransmitting data if communication fails.

z If the BHT is introduced into an environment in which a device using 2.4 GHz waveband

electromagnetic waves is operating, or if another device using 2.4 GHz waveband electromagnetic

waves is introduced following introduction of the system, run all devices and ensure that

communication with the BHT is possible prior to use.

z Check communication once again prior to use if any changes are made to the usage environment

(addition of household appliances, movement or addition of shelves, equipment and so on)

following introduction of the system.

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Denso BHT-825QW User Manual Page 218