Wireless Communication; Usage Precautions - Denso BHT-500B User Manual

BHT-500B

5.3 Wireless Communication

The BHT-504BW is equipped with a 2.4 GHz waveband wireless module.

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 built-in 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 metal objects or in places with high levels of metallic dust
- Rooms surrounded by metal walls
- Places subject to strong impact
 Point 
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.
Use a program capable of retransmitting data if communication fails.

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.
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 
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 instances 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).
158
Requests to System Designers
Wireless LAN Interference