Massa M3 Uživatelský manuál stáhnout pdf (Strana 8)

Instruction Guide – Massa M3 Wireless Sensor Evaluation Kit Page of 14

M3 Kit Guide 111017.docx 10-20-2011

PRELIMINARY

M3 Application Software

Validating Gateway Placement for Reliable Wireless Connectivity

The RF signal strength between the Gateway and the Sensor should be checked to ensure a reliable

communication link. Before testing for signal strength, verify that the antennas on both the Sensor

and the Gateway are vertical. As previously discussed, the M3 Software Status reports the Sensor’s

radio signal strength at the Gateway. This report has four reporting levels, “Very Strong”, “Strong”,

“Moderate”, and “Weak”, as shown in the Radio column in the figure below.

To check the signal strength, go to the “Data” tab and click on one of the “Acquire Data” buttons.

Repeat this several times to check the repeatability of the radio signal strength. If the signal strength

is “Very Strong”, there will be a very reliable communication link. However, this condition will not

always exist. A “Moderate” signal strength is acceptable, but a “Weak” signal may require

repositioning the Gateway since typically the Sensor cannot be moved as it is installed on a process

tank. If the Gateway cannot be placed close enough to the Sensor to produce a strong enough

signal, a Digi Wall Router (repeater) may be required. The Gateway can be located outdoors, since it

is rated for temperatures of -30ºC to +70ºC, but it must be placed in a watertight enclosure.

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Massa M3 Uživatelský manuál Strana 8