User's Guide

CHAPTER 5. SUPPORT 13
Check that the antenna is tight
The antenna connects to the node through a threaded SMA connec-
tion. This should be tightened by hand against the connector on the
enclosure. If this connector is loose, the node’s signal strength and
therefore its ability to connect to the network will be significantly
impaired.
Check that the antenna is correctly oriented
The antenna’s orientation can also impact its ability to connect to
other nodes. Typically, the correct orientation for the antenna is
vertical (perpendicular to the ground.) In tunnels or when monitor-
ing a wall, it may be more appropriate to orient the antenna to be
perpendicular to the wall surface. Check with Senceive to ascertain
the best arrangement for your site.
5.2 Troubleshooting - Vibrating Wire
Vibrating wire sensors are sealed units, so checking of devices is
confided to visual inspection, checking of connections and mea-
surement of basic device parameters.
5.2.1 No frequency or temperature readings
Check battery readings
Check if that the node has been reporting a valid voltage of the
most recent sampling periods, if not then see the FlatMesh Node
troubleshooting section.
Check for physical damage
Check that the node, connectors and cabling for damage or signs
of either moisture of water ingress, if there is damage to the sensor
refer to the sensors manuals trouble shooting section.
Check that the sensors connector for damage, that it is fully
screwed to the node and that it is connected to the correct port
on the Node.
Check sensor connections
Open up the connector and check that there is a good contact
on the screw terminals and that the temperature and the vibrating