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Summary of Contents for Campbell RTMS SYSTEMS
- Page 1 RF FOR RTMS SYSTEMS INSTRUCTION MANUAL REVISION: 3 /95 COPYRIGHT (c) 1995 CAMPBELL SCIENTIFIC, INC.
- Page 2 WARRANTY AND ASSISTANCE The RF FOR RTMS SYSTEMS are warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty. CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is limited to repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective...
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Page 3: Table Of Contents
RF FOR RTMS SYSTEMS TABLE OF CONTENTS PAGE SECTION 1. GENERAL RADIOTELEMETRY NETWORK Introduction..........................1-1 Field Station..........................1-2 Base Station ........................... 1-3 Repeater..........................1-4 SECTION 2. ASSEMBLING THE RADIOTELEMETRY NETWORK Final Layout ..........................2-1 Install Base Station......................... 2-1 Install Nearest Repeater/Field Station..................2-2 Test the Radiotelemetry Link.................... -
Page 4: Introduction
The stations should not have major To accomplish data collection from isolated obstacles between them, therefore, they sites Campbell Scientific, Inc. utilizes a should be within line-of-sight of each other. radiotelemetry network. Dataloggers can be accessed by radiotelemetry which requires no... -
Page 5: Field Station
1.2 FIELD STATION Equipment Required: Purpose: The field station is where the measurements are made. The Radio Campbell Scientific datalogger RF Modem resides at this station taking the Antenna and antenna cable desired measurements. Any field Datalogger station can also operate as a Power supply, enclosure, sensors, and repeater. -
Page 6: Base Station
SECTION 1. GENERAL RADIOTELEMETRY NETWORK 1.3 BASE STATION Equipment Required: Purpose: A base station utilizes a computer to collect data from the field Radio station(s). Normally, all RF Base Station communication to the field stations OS/2 Computer with RTMS software originate at the base station. -
Page 7: Repeater
SECTION 1. GENERAL RADIOTELEMETRY NETWORK 1.4 REPEATER Equipment Required: Purpose: To act as relay between two communicating stations separated Radio by too long of a distance or an RF Modem obstacle which impedes direct Antenna and antenna cable communication. A repeater is not 12V and 5V power supply (PS512M) always required in a radiotelemetry Enclosure and other mounting needs... -
Page 8: Final Layout
SECTION 2. ASSEMBLING THE RADIOTELEMETRY NETWORK This section provides a logical order for RF network assembly and deployment. Details of specific components in the system are described in Section 3 “Radiotelemetry Network Components.” This component section is cross-referenced throughout this assembly section. 4. -
Page 9: Install Nearest Repeater/Field Station
SECTION 2. ASSEMBLING THE RADIOTELEMETRY NETWORK when a valid network description containing blue than a warning or fault message has remote sites is “made active” attempts to occurred. If the site is green, successful communication with the various remote sites communication has occurred. -
Page 10: Test The Radiotelemetry Link
SECTION 2. ASSEMBLING THE RADIOTELEMETRY NETWORK 1. Tripod or tower 2.4.2 AN UNSUCCESSFUL TEST 2. Enclosure and datalogger - Turn on If the base cannot communicate with the datalogger. remote, a TEST FAILED message will be displayed in the TEST STATUS/RESULTS box. 3. -
Page 11: Adding Stations To The Net Description
SECTION 2. ASSEMBLING THE RADIOTELEMETRY NETWORK 1. RF modem's ID matches ID in the RF Path. 2.6.1 NETWORK HEALTH DISPLAY AND ERROR, WARNING, AND STATUS 2. Field station's radio and datalogger have MESSAGES sufficient power. As remote sites are added to the network 3. - Page 12 SECTION 2. ASSEMBLING THE RADIOTELEMETRY NETWORK second quality record would apply to how well the repeater received from the remote, and the third record would apply to how well the base received from the repeater. A "Quality Record" is made up of five values as follows: First Value test packet size;...
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Page 13: The Rf95T Modem
3-1. There are two ports for interfacing external the RAM chip soldered in place and should be devices. The port labeled TRANSCEIVER returned to Campbell Scientific for the necessary connects to the radio, and the port labeled SERIAL modifications. The DC95 modem and SDC I/O connects to the datalogger, PS512M or hardware can't be used or upgraded. - Page 14 SECTION 3. RADIOTELEMETRY NETWORK COMPONENTS 3.1.2 RF95T STATES The ninth switch should be set in the RF95T-ME state (switch nine should be open, represented by a 1). Refer to Figure 3-2. The RF95T is shipped with the switch set for the RF95T-ME state. TABLE 3-1.
- Page 15 SECTION 3. RADIOTELEMETRY NETWORK COMPONENTS Packet are routed from the computer to the 3.1.6 RF95T MODEM COMMUNICATION dataloggers on demand. These maintenance PROTOCOL type operations include the following: Polling begins with the RFBase (or last common Clock set or check. repeater) sending a single short broadcast to all remotes in the affected area.
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Page 16: Rf100/Rf200 Radios
3.1.8 RF95T CONNECTIONS 3.2.1 RADIO DESCRIPTION The 9-pin Serial I/O connector is normally used The RF100 and RF200 are used in Campbell to connect the RF95T to the datalogger, Scientific's RF applications to transmit and PS512M, or CH512R. Table 3-4 describes the receive data blocks. -
Page 17: Antennas And Cables
Antennas must be mounted above any surrounding buildings or obstacles. Antennas The RF100 and RF200 Radios are shipped from Campbell Scientific mounted on a special must be properly oriented in relationship to the bracket with a cable going from the radio to a other antennas for RF communications to work. - Page 18 FIGURE 3-5. The PD46 Clamp Mount female receptacle, and Type-NF (female) for antennas with male receptacles. A Campbell Scientific antenna cable complete with connectors is specified as either COAX NM-L or COAX NF-L. COAX NF-L is a coaxial RG-8A/U cable with a BNC connector on one end and a Type-NF connector on the other.
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Page 19: Tripods, Towers, Enclosures And Power Supplies
Inside dimensions of the For the different mounting requirements, ENC 12/14 are 14" x 12" x 5.5", outside Campbell Scientific offers the CM6 Tripod, CM10 dimensions are 18" x 13.5" x 8.13" (with Tripod, UT3 Tower, and UT930 Tower. All brackets);... -
Page 20: Rf232T Base Station
SECTION 3. RADIOTELEMETRY NETWORK COMPONENTS incorporate this instruction into their data 3.4.3.2 PS12LA Lead Acid Power Supply acquisition programs to keep track of the state The PS12LA power supply includes a 12V, 7.0 of the power supply. If the system voltage level amp-hour lead acid battery, AC transformer, consistently decreases through time, some and a temperature-compensated charging... - Page 21 SECTION 3. RADIOTELEMETRY NETWORK COMPONENTS The RF232T Base Station includes an RF95T TABLE 3-9. Pin Description for RF232's Modem with a carrier detect light. The RF95T 25-Pin Port Modem sits directly behind the RF232T front Description panel. For a description of the Carrier Detect Light and the communication protocol, refer to Ground Section 3.1 "RF95T Modem."...
- Page 22 SECTION 3. RADIOTELEMETRY NETWORK COMPONENTS FIGURE 3-8. Top View of the RF232T Base Station 3-10...
- Page 23 SECTION 4. OPERATION OF THE RADIOTELEMETRY NETWORK All field stations can be accessed and monitored from the central base site. Regular visits to the field sites are required to ensure that all sensors are in place, enclosures are dry, solar panel is clean, and that the tripod and antenna are secure.
- Page 24 SECTION 4. OPERATION OF THE RADIOTELEMETRY NETWORK Do _____ RETRIES USING A _______ 4.1.1.3 NETWORK HEALTH AND SEC PERIOD THEN USE _______ SEC: STATUS-WARNING-FAULT MESSAGES This allows specifying the rate of reties for a The RF-specific messages are described in maintenance operation that fails.
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Page 25: Graphterm For Dos Version 2.2 Or Newer
SECTION 4. OPERATION OF THE RADIOTELEMETRY NETWORK Enabling the HIPRIORITY flag will cause Unlike RTMS, GraphTerm can only be used RTM, and in turn DlsMgr and the RFBase, to with one site at a time and is not intended for attempt to collect data as fast as possible unattended use. - Page 26 SECTION 4. OPERATION OF THE RADIOTELEMETRY NETWORK Select CR10T as the DATALOGGER TYPE: RFBase is known it can be used. Otherwise, parameters. Press the SPACE BAR to step specify a number that is different from what through the options. Press ENTER to was specified for the STATION NO: advance to the next parameter.
- Page 27 SECTION 4. OPERATION OF THE RADIOTELEMETRY NETWORK The CALL STATION stationname option is from the dataloggers Input Locations and other used to initiate a connection with the field data tables. The values can be displayed site. After the call, GraphTerm remain in digitally or graphically on strip charts and bar telecommunications (on-line) with the charts.
- Page 28 SECTION 4. OPERATION OF THE RADIOTELEMETRY NETWORK The EXAMINE DATA TABLES option allows the datalogger tables to be displayed in tabular form. GraphTerm prompts will allow the selection of which tables and fields within the tables will be examined. As in the MONITOR MODE (see above) these displays are limited to the data in the datalogger and data is collected on demand.
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Page 29: Appendix A. Setting The Station Id
APPENDIX A. SETTING THE STATION ID Each RF modem has nine dip switches; the first eight must be set for a particular Station ID. Following is a list of all possible Station IDs with the corresponding setting of the dip switches. Here, 1 represents open, 0 is closed, and Switch 9 should be open. - Page 30 APPENDIX A. SETTING THE STATION ID SWITCHES SWITCHES SWITCHES 1234 56789 1234 56789 1234 56789 1001 0100X 0010 1010X 1111 1110X 0101 0100X 1010 1010X 0000 0001X 1000 0001X 0011 0101X 1110 1011X 0100 0001X 1011 0101X 0001 1011X 1100 0001X 0111 0101X...
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Page 31: Appendix B. Alternate Base Station Configurations
APPENDIX B. ALTERNATE BASE STATION CONFIGURATIONS The basic base station consists of a computer and the RF232T Base Station. There are other options for a base station including a portable base station, a phone-to-RF base station, and a phone-to-RF base station with measurement capability. B.1 THE PORTABLE BASE STATION B.2 PHONE-TO-RF BASE STATION The portable base station is an aid in setting up... -
Page 32: Appendix C. Power Calculations
APPENDIX C. POWER CALCULATIONS There must be enough transmission power in any RF link to complete communication. The sources of power are the radio and the antennas. Conversely, power is lost both through the cables (coax loss) and over the distance of communication (path loss). The power of the signal received (Signal Power) can be calculated as stated below. -
Page 33: Appendix D. Fundamentals Of Radiotelemetry
The antenna converts energy from the earth. However, neither the ground wave or sky radio to radiated energy. Electrons within the wave is used in Campbell Scientific's RF net- antenna oscillate at the frequency of the radio works. thereby producing radio waves. These radio waves radiate out from the antenna at the speed of light (299,800 km/s). - Page 34 APPENDIX D. FUNDAMENTALS OF RADIOTELEMETRY Every antenna has a known horizontal and modem ID in sequence. After sending this vertical pattern of radiation. The horizontal information out through the RF system, all of radiation pattern consists of any segment of a the RF95Ts in the specified link will set 360 degree circle surrounding the antenna.
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