Xylem SIT65 SATELLITE INTERNET TELEMETRY - Manual (Page 3)

Global Water Instrumentation
3
Introduction
Thank you for the purchase of a Global Water SIT65 Satellite Telemetry Station.
This instrument has been quality tested to provide you with accurate and reliable
operation for your remote monitoring needs. We are confident that you will find this
product to be a valuable asset to your applications. Should you require any
assistance, our technical staff will be happy to help.
The SIT65 Field Station is a cost effective and completely self-contained system for
relaying analog and digital sensor data from the most remote locations around the
world to any computer connected to the internet. Up to 8 analog inputs are available
in a number of configurations and up to 5 digital I/O channels that can be
programmed as input counters, status inputs or control outputs. A separate battery
voltage monitor is provided which can be very useful when monitoring system
performance, especially when using solar power. A VHF radio modem and antenna
is included for accessing the satellite network and two different databases are
provided for viewing your data. No complicated setup or antenna alignment is
required, just an unobstructed view of the sky.
The satellite network that the SIT65 communicates with is owned and operated by
Orbcomm. With over 30 low-earth orbiting satellites, they provide a constantly
rotating and complete coverage of the entire Earth. Ground stations spaced all
around the world receive the data from these satellites and relay it via the internet to
each of two separate databases. These databases have different appearances and
features so accounts are provided to our customers for both. They are also located
in separate geographical locations and have different IP addresses; which provides a
higher level of redundant internet access and data storage.
The system is programmed at the factory to transmit at regular intervals from every
few minutes to several hours apart depending on the application. The controller is
also able to send additional alarm transmissions when any of the digital inputs
change state. The databases allow the setting of threshold levels that will provide
email and text message notification when these thresholds are exceeded. Alarms
levels can be set for any of the analog or digital sensors.
The Orbcomm network charges fees based on the amount of data transmitted.
There are many input channel options available and when combined with different
transmission intervals, alarm transmissions and control commands; a wide range of
data charges can occur. There is always a balance between the number of sensor
channels enabled, the transmission interval, and the subscription fees. These fees