Description - RF-SSK Site Survey Kit Wireless devices, by their very nature, mean there is always an
initial element of uncertainty as to whether devices will be able to
Several factors affect this ability, such as frequency, interference and
The SonNet SSK (Site Survey Kit) eliminates this uncertainty by
allowing a survey of the building using the same power levels and
frequency channel the final system will use.
Intuitive and simple to use,
a plan of devices, routers and receiver can be quickly established to
give full confidence in the final installed system, while at the same
time allowing a concise list of exactly the right number of device types
to be compiled.
Data is transmitted back to the receiver at configurable time
intervals, or on a configurable change in measured value. Each sensor
retains these configurations if the battery becomes discharged or
The SSK Receiver
The receiver automatically selects which of the 16 transmission channels
available gives the best radio network performance, taking into account
both signal strength and interference levels from adjacent channels and
equipment (such as Wi-Fi etc.)
The SSK hand-held monitor, nodes and
routers automatically find the best path back to the receiver, which may
be directly to the receiver or via “parent” routers.
The SonNet Site
Survey Kit (SSK) is designed to make the planning and installation of a
SonNet radio sensor system simple and quick and to take the guesswork
out of the radio communications aspect of the network.
The SSK receiver should be placed where the actual RS-RX system receiver will be
installed (typically in a plant room or riser).
The hand-held monitor (HHM)
communicates with the SSK receiver (via a router, if necessary), and the
LCD display shows which nodes are on-line and the quality of the radio
link to their “parent” devices.
Follow the step-by-step guide to
determine where to position the receiver, any necessary routers, and to
test that all sensor nodes can communicate with the receiver reliably
Ensure that the SSK receiver, HHM, and
special battery powered SSK routers and nodes are fully charged.
Always use the correct chargers provided for each device. Batteries
will be damaged if not charged by the correct charger.
Place the SSK receiver where the system
receiver will be placed, ensuring that the aerial is aligned
vertically if possible.
Switch on the SSK receiver.
Switch on the HHM. After a brief period, the
LCD display will show the HHM in the device list.
Place the battery powered sensor nodes where
required by the site specification, taking care to ensure that the
sensors are not placed:
In direct sunlight or near a source of
On a cold or hot outside wall, where
conducted or radiant heat may affect the accuracy
Behind any obstruction likely to impede
the radio signal (for example, a filing cabinet)
Using the HHM, observe whether each battery
powered sensor node has communication back to the SSK receiver. If
it does, observe the quality of the link, shown on the LCD display.
If the link quality is shown as good or
v. good, no router is required for this node. Go to the next step
If there is no communication, or the link
quality is shown as marginal to the SSK receiver, you will need
to position a router between the node and the receiver.
In this case, position a router between
the node and receiver in a convenient location, remembering that
a system router in the final installation will require a
permanent 24V supply.
Observe the HHM again. The new router
should be registered on the HHM.
Using the HHM, observe the link quality
for the new router to the receiver. If the link is shown as good
or v. good, proceed to the next step
If the link quality is shown as marginal,
select the new router and then navigate to “Verification” on the
HHM menu. Press the OK key to force the new router into
verification mode. The node will go off-line for a short period,
then rejoin in verification mode. The router will now try to
find a better communications path back to the receiver via
another router, if there is one already installed. Note the link
quality and the position of the router. It is recommended that a
drawing or floor plan be used to mark device positions.
Using the HHM, select the node and then
navigate to “Verification” on the HHM menu. Press the OK key to
force the new router into verification mode. The node will go
off-line for a short period, then rejoin in verification mode.
Note the link quality and the exact position of the router.
Where a router or node has been placed
into verification mode, it must be returned to normal operating
mode by resetting or power cycling prior to moving to step
If left unattended for more than 5 minutes, a
router or node placed into verification mode will automatically
return to normal mode.
Continue placing battery powered sensor nodes
(and routers if required), until battery powered sensor nodes have
been tested at the required points, good quality links are shown for
all devices on the HHM, and complete coverage is demonstrated.