User's Manual

7
Notes and Precautions for Installing Wireless
Communication Devices
When installing wireless communication devices take special care in selecting locations so
as to ensure proper communication.
Note that even after a successful installation, due to changes in environmental conditions,
communication errors may occur when restarting the system.
Keep wireless communication devices away from metals and computers.
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Please take note that in many instances, walls, floors, stairs, barriers of all types and
desks will contain metals.
Please install these devices at least 30 cm away from walls or boards containing metal.
Please place units more than 1 meter away from computers.
Objects which contain lots of water, such as plants or soil, absorb radio
waves. We highly recommend that such objects not be placed between or
near wireless communication units.
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A study made in measuring temperature in a greenhouse has shown that as tomatoes
grew, communication errors also increased.
Do not place units directly on the ground. Set them up in a high unobstructed position.
If wireless communication units are placed in a metal container such as a
freezer or refrigerator, the wireless communication range will be shortened.
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Please check wireless signal strength to find the best possible communication points.
In most cases radio waves are transmitted via doors and door openings so place
devices as near to doors as possible.
Keep all wires as far away as possible from wireless communication
devices.
- Be careful about placing devices near any wiring or cables such as power supply cables,
telephone wires or LAN cables.
Do not place devices which are using the same communication frequency
channel in the same area.
- If more than one device is being used make sure to set a different communication
frequency channel for each device. If the same channel is used for multiple devices not
only will more communication errors occur, but battery life will also be shortened.
Keep the devices away from noise-emitting sources.
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Equipment such as some industrial instruments, electronic devices or fluorescent lamps
generate noise. Place devices at least 30 cm away from any noise-emitting sources.
After having made an installation check the wireless signal strength.
- The software application includes a function to check wireless signal strength.
If you are transmitting between indoors and outdoors we suggest installing
the device near a window or some such place where signals can easily
pass through.
- Note that moving units 10 cm in any one direction may result in communication results
being significantly changed.
If no change occurs after moving the units to several nearby locations, we strongly
suggest adding one or more Repeaters to enhance communication.