Transcript
Radio Telemetry Model 9200 Datasheet
Remote Radio Link (RRL) The Solinst Remote Radio Link (RRL) is a wireless system designed to collect real-time data from Leveloggers, Barologgers and Rain Loggers. Up to 10 RRL radio units, each connected to one logger, are placed in the vicinity of a Base Station Radio, which is attached to a computer. The Base Station collects the last readings from the Levelogger devices attached to each of the RRL units at 15, 30 or 60 minute intervals, as scheduled. The Base Station protocol uses Modbus which allows easy connection to SCADA systems. RRL radios operate on the 915 MH band, which avoids interference from other radio systems in the area.
Radio Distances The spread spectrum radios used in an RRL system are 100 mW units and can communicate effectively up to 1000 ft. (300 m) through forests. Transmission distance can be increased by using more sophisticated Yagi antennae or by using small antenna towers to raise the antenna above local radio signal obstructions. All antennae have to be above ground and snow cover. They should be above wire fencing and not near metal, but they can be covered with PVC. In addition, the simple RRL networks can be configured so that one RRL unit can act as a ‘Repeater’ for another RRL too distant for direct communications with the Base Station. Repeater radios transmit data from their own Leveloggers and the data from the remote radio repeating via them. The radio attached to a Base Station Computer will often be inside a building, so we recommend that the antenna be placed in a window facing the remote radios.
Leveloggers, Barologgers, Rain Loggers Levelogger devices are programmed using Levelogger Software. The Leveloggers are suspended in water and the Barologger should be directly connected to the Base Station, out of the sun, but above water. Levelogger devices have an on-board datalogger that will store all of the logged values, which can be downloaded separately, if circumstances require it. (See Data Sheets 3001 and 3002).
Software An RRL System is very easy to set up. The Programming Window of the software (shown at left) provides a very easy system set-up. Simply click on a Radio number and drag the radio out of the Unused Radios Box onto the desktop. Just double-click to set up the naming, radio address and sample interval options. Password protection is available.
Battery Life and Clock Synchronization Each remote RRL has a 9V battery. This is expected to last for up to one year at a data collection rate of once/ hour. However, if the remote unit is used for ‘repeating’ to another unit, it will use up power at a faster rate. Power consumption also increases if the radio reception is poor between radios, as the radios stay on for longer periods of time establishing radio connection.
RRL Set-up Window
Printed in Canada 06/2005
Radio synchronization is performed automatically by the Base Station and RRL network. The Base Station Radio uses a NEMA 4 box 3-1/4”x 3-1/4”x 2-1/4” (82.5 x 82.5 x 57 mm). The remote radios use a NEMA 4 box 2-1/2”x 4-1/2”x 1-5/8” (63.5 x 114.3 x 41.3 mm). The antenna adds a further 7” (177.5 mm) to the height.
For further information contact: Solinst Canada Ltd. Fax: (905) 873-1992; (800) 516-9081 Tel: (905) 873-2255; (800) 661-2023 35 Todd Road, Georgetown, Ontario, Canada L7G 4R8 Web Site: www.solinst.com E-mail:
[email protected]
