Campbell AL200 Instruction Manual Download

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INSTRUCTION

MANUAL

AL200 ALERT2 Encoder,

Modulator, and Sensor Interface

4/14

C o p y r i g h t © 2 0 1 3 - 2 0 1 4

C a m p b e l l S c i e n t i f i c , I n c .

Summary of Contents for AL200

Page 1: ...INSTRUCTION MANUAL AL200 ALERT2 Encoder Modulator and Sensor Interface 4 14 C o p y r i g h t 2 0 1 3 2 0 1 4 C a m p b e l l S c i e n t i f i c I n c ...

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Page 3: ...ducts to CSI CSI will return such Products by surface carrier prepaid within the continental United States of America To all other locations CSI will return such Products best way CIP port of entry per Incoterms 2010 This warranty shall not apply to any Products which have been subjected to modification misuse neglect improper service accidents of nature or shipping damage This warranty is in lieu...

Page 4: ...ng container Campbell Scientific s shipping address is CAMPBELL SCIENTIFIC INC RMA _____ 815 West 1800 North Logan Utah 84321 1784 For all returns the customer must fill out a Statement of Product Cleanliness and Decontamination form and comply with the requirements specified in it The form is available from our web site at www campbellsci com repair A completed form must be either emailed to repa...

Page 5: ... 2 4 1 2 Configuring the AL200 2 4 2 Datalogger Peripheral Mode 3 4 2 1 Physical Setup 3 4 2 2 Configuring the AL200 3 5 Overview 4 6 Specifications 5 7 Installation 8 7 1 Configuring the AL200 8 7 1 1 Stand alone Device 9 7 1 2 Datalogger Peripheral 12 7 2 Mounting in an Enclosure 14 7 3 Grounding 14 7 4 Wiring 14 8 Operation 14 9 Maintenance 15 10 Troubleshooting 16 11 Repair 16 Appendices A Glo...

Page 6: ... Sensor IDs G 1 H Calculating Multipliers and Offsets H 1 Figure 5 1 AL200 5 6 1 AL200 dimensions 6 Tables B 1 CS I O Pin Description B 1 B 2 RS 232 Pin Description B 1 B 3 USB Pin Description B 2 B 4 Power Input Pin Description B 2 B 5 Radio Interface Pin Description B 3 B 6 Sensor I O Pin Description B 3 B 7 GPS Input Pin Description B 3 C 1 GPS LED State Descriptions C 1 C 2 Serial LED State De...

Page 7: ...surge protector ensure that the protector does NOT block DC voltages Ensure maximum protection against electrical transients surges Install coaxial surge protection on all antenna runs Keep RS 232 and CS I O connections short The AL200 is NOT powered over CS I O When powered over USB the AL200 will not power up either the radio or attached sensors The device driver for the AL200 must be installed ...

Page 8: ...puter before you can connect to the AL200 via USB See Appendix E AL200 USB Driver Installation Instructions for instructions on installing the device driver 1 Connect the supplied USB cable between a USB port on your computer and the USB port on the AL200 The AL200 will be powered over the USB for configuration only The AL200 will not turn on an attached radio and transmit while powered over the U...

Page 9: ...x the AL200 is configured for ALERT2 on CS I O ALERT Concentration on RS 232 datalogger peripheral mode In this mode the AL200 will receive ALERT protocol packets on the RS 232 port from an external device and retransmit them as ALERT2 packets using the ALERT concentration protocol The AL200 will also receive ALERT2 IND layer packets on the CS I O port and retransmit them as ALERT2 packets 4 2 1 P...

Page 10: ...he manufacturer for necessary radio settings GPS Settings Leave all settings as defaults Sensor Input Settings Leave all settings as defaults 5 Overview The AL200 ALERT2 Encoder Modulator and Sensor Interface is designed for use in radio networks using the ALERT2 protocol The AL200 can be configured to operate as a stand alone device or as a datalogger peripheral In stand alone mode the AL200 will...

Page 11: ...lows for the easy connection of an analog radio Removable screw terminals are also used for supplying power to the AL200 and connecting sensors Lastly there is a copper ground lug for attaching an earth ground 6 Specifications Operating Temperature Standard 40 to 60 C Power 9 18 Vdc Current Drain 12 Vdc Idle 1 5 mA GPS Fix 40 mA Transmit 35 mA not including radio or attached sensors Reverse polari...

Page 12: ...E AL200 USB Driver Installation Instructions for instructions on installing the device driver When used as a datalogger peripheral the same Device Configuration Utility software is used to configure the AL200 Additional steps will be required to program the datalogger to interface with the AL200 USB Micro B receptacle Can power AL200 during configuration not suitable for operational current draws ...

Page 13: ...terface Removable screw terminal connector 0 15 pitch Transmit only Transmit Audio Tx 100 1000 mV peak to peak software adjustable Switched Voltage SW12V switched supply voltage 1 8 A at 70 C Sensor I O Removable screw terminal connector 0 15 pitch Switch closure P1 Internally pulled up to 5 V 16 bit counter 3 3 ms time constant for debounce 5 ms minimum closed time 6 ms minimum open time Single e...

Page 14: ...he AL200 is configured via the USB port using the Device Configuration Utility It is important to have an understanding of the network that the AL200 will be used in There are many settings that are used to configure when and how the AL200 will report data in the time division multiple access TDMA scheme Incorrect settings can cause channel contention and may result in lost data The device driver ...

Page 15: ... that must be unique within the network This is an integer between 0 and 65 501 A database of source addresses can be found at www alert2 org Set the Frame Length This is the total amount of time that all of the stations in the network will report in This is an integer with a resolution of 500 ms between 500 and 43 200 000 12 hours Set the Slot Length This is the maximum amount of time within the ...

Page 16: ...seconds that the radio will be fed a tone modulated carrier Set the Tail Time 5 This is the amount of time in milliseconds an unmodulated carrier will be transmitted following data transmission Set the Modulation Voltage 390 This is the peak to peak voltage level of the modulated signal that will be fed to the radio Value is expressed in millivolts Set the Modulation Polarity Normal This is the po...

Page 17: ...at along with the SE1 Multiplier will be used to convert the analog output of a sensor to an engineering unit See Appendix H Calculating Multipliers and Offsets for how to calculate multipliers and offsets Set the SE1 Tx Change This is the threshold which a calculated value for the SE1 measurement must exceed in order to trigger a data transmission Set the C1 Mode Set to Status to configure C1 to ...

Page 18: ...e It is a good idea to save the configuration file for later reference 7 1 2 Datalogger Peripheral Main Set the Operation Mode to either ALERT2 on CS I O ALERT Concentration on RS 232 or ALERT Concentration on CS I O ALERT2 on RS 232 depending on what type of device the AL200 will be connected to ComPort If the AL200 is connected to a Campbell Scientific datalogger select the appropriate SDC addre...

Page 19: ...0 series Ritron DTX L series radios If using a different type of radio consult the manufacturer and apply the changes to the following settings Set the Radio Power Up Mode On Only With Data to TX This determines when the radio will be powered on Set the Radio Warm Up 750 This is the amount of time in milliseconds that power will be applied to the external radio prior to data transmission Set the C...

Page 20: ... grommets and 6 32 screws 7 3 Grounding The ground lug should be connected to a good earth ground using 12 AWG stranded wire This will help protect the AL200 from electrical surges and provide a good reference for analog measurements 7 4 Wiring Connect the transmit power and ground lines Push to Talk and Frequency Select lines are optional from your analog radio to the SW12V Tx and G terminals of ...

Page 21: ...not continuously interfere with adjacent time slots When connected to the AL200 with the Device Configuration Utility the AL200 will power up and measure the attached sensors on the Configuration Sensor Scan Interval located on the Sensor Data Monitoring tab but transmissions will be suppressed 9 Maintenance It is a good idea to periodically check the sensor inputs against known values to ensure t...

Page 22: ...00 is reporting incorrect values The applied multipliers and offsets are not correct There is an issue with the attached sensor or sensor wiring The radio LED is always red The AL200 has been configured to keep the radio always on The GPS LED is on longer than the maximum allowed on time The GPS module is attempting to obtain leap second information and may be on for up to 13 minutes 11 Repair The...

Page 23: ... Device A device that implements the AirLink and MANT protocols for the transmission repeating or receipt of ALERT2 data MANT ALERT2 Network and Transport layer providing the required services to transport application and network control data PDU Protocol Data Unit Data payload with control header used for exchange between protocol layers Sometimes generalized as packet SDC Synchronous Device Comm...

Page 24: ...Appendix A Glossary A 2 ...

Page 25: ...atalogger Function DB9 Female AL200 Function DB9 Male 1 5 VDC N C 2 SIGNAL GND SIGNAL GND 3 RING RING 4 RXD TXD 5 ME ME 6 SDE SDE 7 CLK HS CLK HS 8 12 VDC N C 9 TXD RXD B 2 RS 232 RS 232 is used for asynchronous serial communication It is a standard EIA TIA 232 DB9 socket female DCE interface A DB9 male to male null modem cable pn 18663 is used to connect the AL200 to a Campbell Scientific datalog...

Page 26: ... device driver TABLE B 3 USB Pin Description Pin Function 1 VBUS 5 Vdc 2 Data 3 Data 4 Not used Grounded Internally 5 GND B 4 Power Input power is supplied via a 2 pin screw terminal A mating connector is supplied pn 7843 TABLE B 4 Power Input Pin Description Pin Function G Supply Ground 12V Supply Voltage B 5 Analog Radio Interface The analog radio interface is a 5 pin screw terminal A mating con...

Page 27: ... Sensor I O Interface The sensor I O interface is a 5 pin screw terminal A mating connector is supplied pn 28750 TABLE B 6 Sensor I O Pin Description Pin Function SE1 Analog voltage current input SW12V Switchable sensor power supply P1 Switch closure input Internally tied high to 5V G Ground C1 Digital I O for high low status or SDI 12 B 7 GPS Input The GPS input is a threaded SMA female connector...

Page 28: ...Appendix B Cables and Connector Pin Descriptions B 4 ...

Page 29: ... Description Off Neither interface is currently transferring data Green RS 232 activity Internal U0 activity Red CS I O activity Internal U1 activity The Radio LED is located between the CS I O and USB interfaces It can be used for monitoring the power and communication state of the radio interface TABLE C 3 Radio LED State Descriptions State Description Off Radio interface not currently in use Gr...

Page 30: ...00 has been sent data from a datalogger or data is being internally transferred from the sensor inputs to memory d The Radio LED is red briefly while the radio is powered up and allowed to warm up If the radio is set to always on this LED will constantly be red e The Radio LED flashes orange actually green and red lights but is orange in appearance indicating that the AL200 is transmitting data C ...

Page 31: ...communication over RS 232 RS 232 Parity Parity bit usage during communication over RS 232 RS 232 Stop Bits The number of stop bits sent after each character during communication over RS 232 Time To Next Slot Time seconds until the next transmission slot Station Source Address ALERT2 station source address Each station in an ALERT2 network should have a unique source address Destination Address The...

Page 32: ...il Time Amount of unmodulated carrier to follow transmitted frame The value is expressed in milliseconds Modulation Voltage This setting controls the modulation voltage The value is expressed in millivolts peak to peak Settings do not take effect until applied Modulation Polarity Depending on the radio used the audio AirLink modulation signal may need to be inverted For Midland and Ritron radios s...

Page 33: ...ultiplier Multiplier to apply to the SDI 12 measurement before evaluation Example Water Level SDI 12 measurement SDI 12 Multiplier SDI 12 Offset SDI 12 Offset Offset to apply to the SDI 12 measurement before evaluation Example Water Level SDI 12 measurement SDI 12 Multiplier SDI 12 Offset SDI 12 Tx Change Amount of change in the reading required to trigger Tx of reading Reading SDI 12 measurement ...

Page 34: ...ll be queried and displayed here at a regular refresh interval C1 Scaled Reading If C1 input is enabled this will be either a the control port state or b the value for SDI 12 with SDI 12 Multiplier and SDI 12 Offset applied during the last sensor scan While connected via Device Configuration Utility C1 will be measured every Configuration Sensor Scan Interval The measured value will be queried and...

Page 35: ...ip com Drivers VCP and select the appropriate file based on your computer s operating system Download the zip file to your PC and extract the files to a directory of your choosing Select and open the executable file and proceed through the install wizard After the drivers finish installing you should see a confirmation screen indicating that the drivers were installed or updated successfully You w...

Page 36: ...Appendix E AL200 USB Driver Installation Instructions E 2 ...

Page 37: ... computer s USB ports and the USB port on the AL200 2 Open DevConfig 3 Select the AL200 under Device Type 4 Select the appropriate Communication Port 5 Go to the Send OS tab 6 Press the Start button 7 In the resulting dialog box select the file that should be sent to the device as an operating system this file should have a hex extension and press the OK button 8 The operating system will be sent ...

Page 38: ...Appendix F Updating the Operating System of the AL200 F 2 ...

Page 39: ...d Sensor IDs ID Sensor Type 0 Rain 1 Air Temperature 2 Relative Humidity 3 Barometric Pressure 4 Wind Speed 5 Wind Direction 6 Peak Wind Speed 7 Stage 8 Battery Voltage As recommended in the ALERT2 Application Layer Protocol Specification document Version 1 2 G 1 ...

Page 40: ...Appendix G List of Recommend Sensor IDs G 2 ...

Page 41: ...tion report it is known that the sensor outputs 0 0123 volts at 0 psi and 4 987 volts at 30 psi 12 3 and 4987 millivolts respectively The relationship between the sensor s output in millivolts and pressure is defined by the equation of a line assuming linearity Y mX b where Y is pressure m is the calculated multiplier X is the sensor s output in millivolts and b is the calculated offset Y mX b OR ...

Page 42: ... simply multiply the pressure value by the appropriate conversion factor For fresh water this is 1 psi 2 308 ft For salt water this is 1 psi 2 250 ft For the above example assuming fresh water Depth of Water Pressure 2 308 Depth of Water 15 263 2 308 35 226 ft These calculations can easily be performed using many spreadsheet programs by plotting the sensor s measurement range versus the sensor s o...

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Page 44: ...om br Campbell Scientific Canada Corp CSC 14532 131 Avenue NW Edmonton AB T5L 4X4 CANADA www campbellsci ca dataloggers campbellsci ca Campbell Scientific Centro Caribe S A CSCC 300 N Cementerio Edificio Breller Santo Domingo Heredia 40305 COSTA RICA www campbellsci cc info campbellsci cc Campbell Scientific Ltd CSL Campbell Park 80 Hathern Road Shepshed Loughborough LE12 9GX UNITED KINGDOM www ca...

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