Lord MicroStrain Sensing SG-Link-200, Руководство пользователя

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SG-Link®-200
User Manual
36
The best method for ensuring optimal radio communication is to conduct an RF survey of the
installation site. This is easily accomplished in SensorConnect by using the range test feature to
quantify the radio signal strength (RSSI) in various scenarios.
See Range Test on page 37
for
instructions on using SensorConnect for measuring RSSI. The following are general guidelines for
maximizing communication range:
l
Line of Sight (LOS) between the node and gateway. Try to avoid obstructions such as
buildings, terrain, vegetation, or other physical barriers.
l
Increase the Mounting Height of the node to allow a clearer LOS path to the
gateway. Height above the ground is also important because reflections off of the ground
can interfere at the receiver. Generally, the higher above the ground the better.
l
Minimize Radio Frequency Interference (RFI) from other wireless devices, especially
those operating in the same frequency range. This includes other nodes and 2.4 GHz
WIFI routers. If other wireless devices are required nearby, mount them at different
heights to minimize interference. Additionally, a different radio frequency may be selected
using SensorConnect software.
l
Minimize Electromagnetic Interference (EMI) such as that which is generated by power
transmission equipment, microwaves, power supplies, and other electromagnetic
sources.
l
Metal Objects in close proximity to either antenna, particularly ferrous metals such as
steel and iron, can be problematic for wireless communications. The larger the object, the
greater the influence.
NOTE
In the event of communication difficulties, it may be necessary to disable WIFI on the host
computer, or use a USB extender when collecting data.