Denso BHT-825QW User Manual download pdf (Page 215)

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BHT-825Q series

5.2 Wireless Communication

The BHT-825Q series is equipped with a 2.4 GHz frequency band wireless module.

5.2.1 Usage Precautions

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

BHT (equipped with built-in antenna) toward the access point. This is because the radio waves of the

2.4 GHz frequency band 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

frequency band 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 metal objects or in places with high levels of metallic dust

- Rooms surrounded by metal walls

- Places subject to strong impact

− 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 the 2.4 GHz frequency band

is operating, or if another device using the 2.4 GHz frequency band 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.

− Point − Wireless LAN Interference

In addition to industrial, scientific, and medical equipment such as microwave ovens, static wireless

stations (permit required) used for mobile identification in places such as plant manufacturing lines,

amateur wireless stations, and specified low-power wireless stations (no permit required) operate on

the same frequency band as this device.

1. Before using this device, ensure that no static wireless stations or specified low-power wireless

stations for mobile identification are being used in the vicinity.

2. In the event of electromagnetic interference from this device to a static wireless station being

used for mobile identification, either promptly alter the usage frequency, or halt the

electromagnetic discharge.

3. If other problems arise due to reasons such as electromagnetic interference from this device to a

specified low-power wireless station being used for mobile identification, please contact DENSO

WAVE through QBdirect (see page ii).

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Denso BHT-825QW User Manual Page 215