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Campbell AVW200 series Instruction Manual

Manual is about: 2-Channel Vibrating Wire Spectrum Analyzer Modules

Summary of AVW200 series

  • Page 1

    Avw200-series 2-channel vibrating wire spectrum analyzer modules revision: 2/12 c o p y r i g h t © 2 0 0 8 - 2 0 1 2 c a m p b e l l s c i e n t i f i c , i n c ..

  • Page 3: Warranty

    Warranty “products manufactured by campbell scientific, inc. Are warranted by campbell scientific, inc. (“campbell”) to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless otherwise specified in the corresponding campbell...

  • Page 4: Assistance

    Assistance products may not be returned without prior authorization. The following contact information is for us and international customers residing in countries served by campbell scientific, inc. Directly. Affiliate companies handle repairs for customers within their territories. Please visit www...

  • Page 5

    Avw200-series table of contents pdf viewers: these page numbers refer to the printed version of this document. Use the pdf reader bookmarks tab for links to specific sections. 1. Overview.......................................................................1 1.1 design features .......................

  • Page 6

    Avw200-series table of contents 5.3 data monitor.......................................................................................... 30 5.4 send os ................................................................................................. 32 5.5 troubleshoot ...............................

  • Page 7

    Avw200-series table of contents c.3 surge protectors ...................................................................................C-5 c.3.1 electrostatic issues .....................................................................C-5 c.3.2 antenna surge protector kit .............................

  • Page 8

    Avw200-series table of contents iv 4.5.2-2. Multiplexer to datalogger power/control hookup (multiplexer controlled by datalogger) ........................................................... 24 5.1-1. Opening page in devconfig.............................................................. 26 5.2.1-1. ...

  • Page 9: 1.  Overview

    Avw200-series 2-channel vibrating wire spectrum analyzer modules the avw200 series consist of a base model (avw200) and three wireless models (avw206, avw211, avw216). The wireless models combine the avw200 with a spread spectrum radio. The different model numbers of the wireless versions are for di...

  • Page 10

    Avw200-series 2-channel vibrating wire spectrum analyzer modules the eliminated parameters are: • number of steps • number of cycles • time of swept frequency these parameters are now part of the avw200 internal operating system and require no user input. The user only needs to input the lower frequ...

  • Page 11

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 1.2 specifications 1.3 communication 1.3.1 datalogger the avw200 module is designed to work with and complement campbell scientific dataloggers, as well as data acquisition products from other manufacturers. 3.

  • Page 12

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 1.3.1.1 pakbus protocol/direct rs-232 connection when using the pakbus protocol, the avw200() instruction in crbasic supports an avw200 connected to a datalogger via a cable attached to the avw200’s rs-232 port. You can run the datalog...

  • Page 13

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 1.3.2 computer 1.3.2.1 device configuration utility the device configuration (devconfig) utility supports avw200 configuration, operating system download, and vibrating wire spectrum analysis troubleshooting. To use devconfig, the avw2...

  • Page 14

    Avw200-series 2-channel vibrating wire spectrum analyzer modules am16/32b avw200 cr3000 figure 1.4-1. Network of avw200s and am16/32bs (using a direct rs-232 connection) figure 1.4-2. Network of avw206s and am16/32bs (wireless) com1 (c1/c2) cr1000 com3 (c5/c6) com4 (c7/c8) com2 (c3/c4) cr3000 cr800,...

  • Page 15: 2.  Measurements

    Avw200-series 2-channel vibrating wire spectrum analyzer modules cr10x cr5000 cr23x cr800, cr850 cr1000 cr3000 avw200 figure 1.4-3. Network of avw200 interfaces (sdi-12) 2. Measurements 2.1 vibrating wire the spectral approach implemented by the avw200 offers significantly improved noise immunity wh...

  • Page 16

    Avw200-series 2-channel vibrating wire spectrum analyzer modules figure 2.1-1. Cutaway of vibrating wire sensor there are three user-determined inputs to the avw200 measurement process and five outputs from the measurement process. The input parameters control the excitation frequency range (beginfr...

  • Page 17

    Avw200-series 2-channel vibrating wire spectrum analyzer modules table 2.1-2. Avw200 measurement outputs output units description resonant frequency hz frequency of the peak response response amplitude mv rms amplitude of the peak response 1 signal-to-noise ratio unitless response amplitude divided ...

  • Page 18

    Avw200-series 2-channel vibrating wire spectrum analyzer modules response amplitude noise amplitude resonant frequency noise frequency beginning amplitude ending amplitude figure 2.1-2. Devconfig plots showing the avw200 measurement approach. Please note that the use of the special fft algorithm to ...

  • Page 19: 3.  Quick Start Guides

    Avw200-series 2-channel vibrating wire spectrum analyzer modules read more! You can find an example program that converts resistance to temperature in section 7.1.2 and detailed information about the thermistors in appendix b. 3. Quick start guides the avw200 can be used in many types of systems—fro...

  • Page 20

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 4. Create a crbasic program that includes an avw200() instruction for each of the sensors. Check the manufacturer’s specification for the sensors frequency and excitation range before picking the begin/end frequencies and excitation vo...

  • Page 21

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 2. Attach the vibrating wire sensor(s) to the avw206 as shown in figure 4.1-1. 3. Connect an antenna (or antenna cable with yagi or omnidirectional antenna attached) to the antenna connector on the side of the avw206. Read more! Descri...

  • Page 22

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 3.2 multiplexers controlled by avw200 3.2.1 direct rs-232 connection cable that comes with sensor cable4cbl-l four conductor cable 17855 pigtailed cable or 18663 null modem cable 19246 power cable multiplexer avw200 multiplexer datalog...

  • Page 23

    Avw200-series 2-channel vibrating wire spectrum analyzer modules check the manufacturer’s specification for the sensors frequency and excitation range before picking the begin/end frequencies and excitation voltage. Note for example, the following avw200() instructions can be used to control two mul...

  • Page 24

    Avw200-series 2-channel vibrating wire spectrum analyzer modules at the avw206 site, do the following steps: 1. Use devconfig to configure the avw206 for rf communications (sections 5.1 and 5.2.1). 2. If you are not using the default multiplexer, go to the deployment/measurement tab in devconfig and...

  • Page 25

    Avw200-series 2-channel vibrating wire spectrum analyzer modules for example, the following avw200() instructions can be used to control the multiplexers: avw200(data1(),comsdc7,200,200,mux1(1,1),1,1,16,450,3000,2,_60hz,1,0) avw200(data2(),comsdc7,200,200,mux2(1,1),2,1,16,450,3000,2,_60hz,1,0) where...

  • Page 26: 4.  Connections

    Avw200-series 2-channel vibrating wire spectrum analyzer modules the following steps are used: 1. Access devconfig to configure the avw200 for sdi-12 communications. Go to the deployment/measurement tab in devconfig and enter the sdi-12 address, multiplexer type, begin frequency, end frequency, and ...

  • Page 27

    Avw200-series 2-channel vibrating wire spectrum analyzer modules avw200 figure 4.1-1. Wiring for sensor connections 4.2 power and ground each avw200 has a ground lug for connection to earth ground and a green connector for attachment to a power source (see figure 4.2-1). Only connect the avw200 grou...

  • Page 28

    Avw200-series 2-channel vibrating wire spectrum analyzer modules connects to a power source via 19246 power cable connects to earth ground via an 8 awg wire when not directly connected to a datalogger indicates avw200 is connected to a power source figure 4.2-1. Ground lug and power connectors on th...

  • Page 29

    Avw200-series 2-channel vibrating wire spectrum analyzer modules table 4.3-2. 17855 or sc110’s dte cable wiring wire color of 17855 or sc110’s dte cable cr800, cr850 cr1000, cr3000 brown c1 or c3 c1, c3, c5, or c7 white c2 or c4 c2, c4, c6, or c8 yellow g g 4.4 wireless connections (avw206, avw211, ...

  • Page 30

    Avw200-series 2-channel vibrating wire spectrum analyzer modules wireless communication requires the appropriate spread spectrum radio to be connected to the datalogger (see table 4.4-1). Devconfig is used to configure the avw206, avw211, or avw216 for rf communications (sections 5.1 and 5.2.1). Tab...

  • Page 31

    Avw200-series 2-channel vibrating wire spectrum analyzer modules figure 4.5.1-1. Example am16/32-series to avw200 hookup (multiplexers controlled by avw200) 4.5.2 datalogger controlling the multiplexer when using sdi-12, the datalogger must control the multiplexer. Use the cable4cbl-l cable to conne...

  • Page 32

    Avw200-series 2-channel vibrating wire spectrum analyzer modules avw200 figure 4.5.2-1. Am16/32b to avw200 hookup (am16/32bs controlled by datalogger and using sdi-12) a cable4cbl-l cable is used to connect the multiplexer to the datalogger (see figure 4.5.2-2). Res clk gnd 12v o n muxpower shield c...

  • Page 33

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 5. Device configuration (devconfig) utility our device configuration (devconfig) utility is bundled in campbell scientific’s datalogger support software and can also be acquired, at no cost, from: www.Campbellsci.Com/downloads . Devcon...

  • Page 34

    Avw200-series 2-channel vibrating wire spectrum analyzer modules figure 5.1-1. Opening page in devconfig 5. Select the serial port matching the com port on your computer in which the avw200 is connected. 6. Press the connect button. The device may take up to 60 seconds to respond to devconfig, and f...

  • Page 35

    Avw200-series 2-channel vibrating wire spectrum analyzer modules figure 5.2.1-1. Deployment communications editor in devconfig certain avw206 settings must match the rf401 settings for communications between the interface and radio to be successful. Note description of the communication settings fol...

  • Page 36

    Avw200-series 2-channel vibrating wire spectrum analyzer modules net address—enter the radio network address that matches all of the rf401 radios and other avw206 in the network. Valid entries are 0-3 power mode—if not using a radio, select “radio off” for the power mode. Otherwise, select a power m...

  • Page 37

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 5.2.2 measurement the deployment/measurement tab is used to configure the sdi-12 address, multiplexer type, begin frequency, end frequency, and excitation (see figure 5.2.2-1). Figure 5.2.2-1. Deployment/measurement tab in devconfig th...

  • Page 38

    Avw200-series 2-channel vibrating wire spectrum analyzer modules multiplexer type—choose the appropriate multiplexer. The default multiplexer type is the am16/32b. Begin frequency—if using rs-232 (terminal commands) or sdi-12, enter the sensor manufacturer’s recommendation for the begin frequency. E...

  • Page 39

    Avw200-series 2-channel vibrating wire spectrum analyzer modules read more! Appendix d lists the fields in the public table and provides a brief description of each. The status table contains system operating status information accessible (see figure 5.3-2). Note: devconfig polls the status table at...

  • Page 40

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 5.4 send os for most applications, campbell scientific does not anticipate that it will be necessary to download a new operating system to the avw200. However, if a new operating system (os) is required, in order to send a new os to th...

  • Page 41

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 5.5 troubleshoot the troubleshoot tool in devconfig can be used to evaluate the frequency spectrum of a sensor and to determine the most appropriate beginning and ending frequencies for a sensor. To access the troubleshoot tool, use th...

  • Page 42

    Avw200-series 2-channel vibrating wire spectrum analyzer modules figure 5.5-2. Options tab of the troubleshoot tool 4. Select the avw200 channel either 1 or 2 and the multiplexer channel that the sensor is attached. If not using a multiplexer, then set the multiplexer channel to one. 5. Once the app...

  • Page 43

    Avw200-series 2-channel vibrating wire spectrum analyzer modules response amplitude noise amplitude resonant frequency noise frequency beginning amplitude ending amplitude figure 5.5-3. Graphs for evaluating spectral analysis of a sensor check the manufacturer’s specification for the sensors frequen...

  • Page 44

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 5.6 settings editor the settings editor in devconfig can also be used to enter the deployment parameters (see figure 5.2-1). Refer to sections 5.2 and sections 5.3 for a description of the setting parameters. 5.7 terminal you can monit...

  • Page 45: 6.  Programming

    Avw200-series 2-channel vibrating wire spectrum analyzer modules when using the “mcmm” terminal command, no other method of measurement should be used or multiplexing will get out of sequence and measurement errors will result. Caution read more! Appendix d. Lists the fields in the public table and ...

  • Page 46

    Avw200-series 2-channel vibrating wire spectrum analyzer modules the avw200. If more than one avw200 is used and the instructions are ran in a sequential mode, a different result variable should be specified for each avw200 (see 6.1.2). The result codes are as follows: code description 0 communicati...

  • Page 47

    Avw200-series 2-channel vibrating wire spectrum analyzer modules multi-dimensioned array of 5 or 6 if multiple sensors are being measured using a multiplexer. The first dimension is set equal to the number of sensors being measured and the second dimension is set equal to the number of values return...

  • Page 48

    Avw200-series 2-channel vibrating wire spectrum analyzer modules beginfreq the beginfreq parameter is the starting frequency to use for the vibrating wire measurement. The minimum value that can be entered is 100. Refer to the specifications of the vibrating wire sensor for recommended beginfreq val...

  • Page 49

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 6.1.1 pipeline mode when the crbasic program first starts running, the information specified in the avw200( ) instruction is sent to the attached avw200 interface module via the communication port and pakbus address specified in the in...

  • Page 50

    Avw200-series 2-channel vibrating wire spectrum analyzer modules different result variables for each avw200( ) instruction, this situation can be detected. Therefore, the result variable for the first instruction would be zero (indicating successful communication) and the result variable for the sec...

  • Page 51

    Avw200-series 2-channel vibrating wire spectrum analyzer modules sdiport the sdiport parameter is the port to which the sdi-12 sensor is connected. A numeric value is entered: code description 1 control port 1 3 control port 3 5 control port 5 7 control port 7 sdiaddress the sdiaddress parameter is ...

  • Page 52

    Avw200-series 2-channel vibrating wire spectrum analyzer modules if a check summed command fails, a nan will be returned and the command will be retried. Mult, offset the mult and offset parameters are each a constant, variable, array, or expression by which to scale the results of the measurement. ...

  • Page 53: 7.  Example Programs

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 7. Example programs this section includes several program examples for our cr1000 datalogger. Although the examples are for the cr1000, programming for the cr800 and cr3000 is similar. Appendix g. Has a programming example for the reti...

  • Page 54

    Avw200-series 2-channel vibrating wire spectrum analyzer modules calltable avw200 calltable avwcard nextscan endprog 7.1.2 wireless/one sensor/resistance converted to temperature 'this is an example of a program used by a cr1000 and avw206 to one geokon 4450 vw 'displacement sensor. The sensor provi...

  • Page 55

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 'calculate displacement (inches) from digits and calibration polynomial psi=2.49866e-10*digits^2 + 8.716e-5*digits + -.2 nextscan endprog 7.2 avw200() instruction controlling two multiplexers table 7.2-1 shows wiring used for this exam...

  • Page 56

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 7.3 avw200( ) instruction running in the pipeline mode the following program is an example of how to run the avw200 with a cr1000 using multiple avw200( ) instructions in the pipeline mode of operation. When this crbasic program first ...

  • Page 57

    Avw200-series 2-channel vibrating wire spectrum analyzer modules ' example program running in the pipeline mode ' the clock and reset lines of both muxes are connected to the clk and rst ‘lines of the avw200. Pipelinemode public ptemp, batt_volt public result, avwdst(32,6) const chan1 = 1 ' avw200 c...

  • Page 58

    Avw200-series 2-channel vibrating wire spectrum analyzer modules table 7.4-1 shows the wiring used for both sequential mode examples. Table 7.4-1. Wiring for sequential mode examples datalogger port for cable attachment cable needed to connect to avw200 avw200 port or model com1 (control port pairs ...

  • Page 59

    Avw200-series 2-channel vibrating wire spectrum analyzer modules const chan1 = 1 ' avw200 channel 1 const chan2 = 2 ' avw200 channel 2 const muxchan = 1 ' starting mux channel const reps = 1 ' number of reps const bfreq = 450 ' begin frequency const efreq = 6000 ' end frequency const xvolt = 2 ' 12p...

  • Page 60

    Avw200-series 2-channel vibrating wire spectrum analyzer modules very next measurement will use the bbbb,eeee and vvvv values specified in the extended command. The second and remaining measurements will revert back to the settings specified via devconfig. An example of an extended command is: 0xvw4...

  • Page 61

    Avw200-series 2-channel vibrating wire spectrum analyzer modules ' example program running sdi12 commands with the datalogger controlling ' 2 mux's. For this program, the avw sdi-12 port is connected to dl c1. ' the reset line of both muxes is connected to datalogger c3. Mux1 clock line ' is connect...

  • Page 62

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 8. Troubleshooting communication problems 8.1 unable to communicate with devconfig or terminal emulator if you are unable to communicate with devconfig or the terminal emulator, verify that: (1) the avw200 is powered. The red led at th...

  • Page 63

    Avw200-series 2-channel vibrating wire spectrum analyzer modules power supply must be able to sustain at least 9.6 v (datalogger minimum) even during 75 ma transmitter bursts lasting only a few milliseconds. 4. Lightning damage to rf401 or avw206 swap in a known good rf401 or avw206 with the same se...

  • Page 64

    Avw200-series 2-channel vibrating wire spectrum analyzer modules 56 b. Change to a higher gain antenna c. Change polarization (element orientation) of all antennas in your network (yagi or collinear) from vertical to horizontal or vice versa. 9. Interference from 900 mhz transmitter there are some m...

  • Page 65: A.1  Displacement Example

    Appendix a. Conversion from hertz the calibration report provided with each vibrating wire sensor contains the information required to convert hertz, the frequency value output by the avw200, to the appropriate units (e.G., displacement pressure). These steps convert hertz to the appropriate unit (e...

  • Page 66

    Appendix a. Conversion from hertz figure a.1-1. Geokon calibration report of a sensor without a thermistor a-2.

  • Page 67

    Appendix b. Thermistor information b.1 converting resistance to temperature the avw200 outputs a resistance value for sensors that contain a thermistor. Temperature is calculated by applying the resistance to a known equation (e.G., steinhart-hart equation) which converts resistance to temperature. ...

  • Page 68

    Appendix b. Thermistor information 4. Precision of the bridge resistors 5. Accuracy of the datalogger's voltage measurement 6. Temperature coefficient of the bridge resistors errors three through six can probably be ignored. The wire resistance is primarily an offset error and its affect can be remo...

  • Page 69

    Appendix b. Thermistor information figure b.2-2. Temperature measurement error on a 1000 foot lead. Wire is 22 awg with 16 ohms per 1000 feet. Figure b.2-3. Temperature measurement error on a 3000 foot lead. Wire is 22 awg with 16 ohms per 1000 feet. B-3.

  • Page 70

    Appendix b. Thermistor information figure b.2-4. Temperature measurement error on a 5000 foot lead. Wire is 22 awg with 16 ohms per 1000 feet. B-4.

  • Page 71: Avw206, Avw211, and Avw216

    Appendix c. Antennas, antenna cables, and surge protectors for the avw206, avw211, and avw216 c.1 antennas several antennas are offered to satisfy the needs for various base station and remote station requirements. These antennas have been tested at an authorized fcc open-field test site and are cer...

  • Page 72

    Appendix c. Antennas, antenna cables, and surge protectors for the avw206, avw211, and avw216 16005 0 dbd antenna, 2.4 ghz, omni ½ wave whip, rpsma rt angle, linx ant-2.4-cw-rct-rp, 4.5 inches long. 16755 13 dbd antenna, 2.4 ghz, enclosed yagi, allows vertical or horizontal polarization, maxrad wisp...

  • Page 73

    Appendix c. Antennas, antenna cables, and surge protectors for the avw206, avw211, and avw216 item # 14201 900 mhz yagi 9 dbd w/mounts item #14205 900 mhz yagi 6 dbd w/mounts item # 14221 900 mhz omni collinear 3 dbd w/mounts c-3.

  • Page 74

    Appendix c. Antennas, antenna cables, and surge protectors for the avw206, avw211, and avw216 item #15970 900 mhz indoor omni 1 dbd window/wall mounted item #16005 2.4 ghz omni half wave whip 0 dbd item #16755 2.4 ghz enclosed yagi, 13 dbd w/mounts figure c.1-1. Some fcc approved antennas c-4.

  • Page 75: C.2  Antenna Cables

    Appendix c. Antennas, antenna cables, and surge protectors for the avw206, avw211, and avw216 figure c.1-2. Example coax rpsma-l cable for yagi or omni colinear figure c.1-3. Antenna surge protector c.2 antenna cables the 14201, 14203, 14205, 14221, and 16755 antennas require an antenna cable; eithe...

  • Page 76

    Appendix c. Antennas, antenna cables, and surge protectors for the avw206, avw211, and avw216 • when the antenna cable length exceeds 10 feet • when use of coax rpsma would result in too much signal loss • when the interface will be used in an environment susceptible to lightning or electro-static b...

  • Page 77

    Appendix c. Antennas, antenna cables, and surge protectors for the avw206, avw211, and avw216 this device complies with part 15 of the fcc rules. Operation is subject to the following two conditions: 1) this device may not cause harmful interference, and 2) this device must accept any interference r...

  • Page 78

    Appendix c. Antennas, antenna cables, and surge protectors for the avw206, avw211, and avw216 c-8.

  • Page 79

    Appendix d. The public table the public table of the avw200 displays the current sensor measurement values as well as the current settings (see table d-1). When the deviceconfig runs the troubleshooter, it forces a measurement by writing to the timeseries() array in the public table. When the timese...

  • Page 80

    Appendix d. The public table values and control parameters for sdi-12 communications sdi12val(1) frequency value obtained by sdi recorder instruction, if used; unchanged if not using sdi-12. Sdi12val(2) amplitude value obtained by sdi recorder instruction, if used; unchanged if not using sdi-12. Sdi...

  • Page 81

    Appendix d. The public table control parameters when troubleshooter is running timeseries(1) writing this variable will force a vibrating wire measurement and create the timeseries.Bin and spectrum.Bin files. Example: 101 = measures avw200 chan1 and mux chan1 102 = measures avw200 chan1 and mux chan...

  • Page 82

    Appendix d. The public table d-4 d.1 forced measurement program sequentialmode public usrforcedmsmnt public svresult(2), gvresult(2), timeseries(11) dim ts_done beginprog timeseries(1) = 101 'measure command with xyy as described below. 'x is the avw channel, 1 or 2, and yy is the multiplexer channe...

  • Page 84

    Appendix e. Status table status fieldname description user can change? Rf_forceon when rf_forceon is set to 1 the radio is always on ignoring the duty cycle setting. Yes rf_protocol identifies the radio protocol that will be used. The avw200 is always fixed at 2 (pakbus aware mode) yes (changing thi...

  • Page 85

    Appendix e. Status table status fieldname description user can change? Mspclkfreq(3) msp430 cpu #3 rc oscillator frequecy in hz no mspclkfreq(4) msp430 cpu #4 rc oscillator frequecy in hz no mspclkfreq(5) msp430 cpu #5 rc oscillator frequecy in hz no caloffset calibration offset voltage no varoutofb...

  • Page 86

    Appendix e. Status table e-4.

  • Page 87: Graph Information

    Appendix f. Time series and spectrum graph information the avw200 uses an audio a/d for capturing the sensor’s signal. The number of samples acquired in this period is 4096 points. A fast fourier transform (fft) algorithm is used to create a frequency spectrum. The frequency spectrum is displayed in...

  • Page 88

    Appendix f. Time series and spectrum graph information figure f.1-1. Good sensor with a narrower range (200 to 2200 hz) figure f.1-2. Good sensor with a wider range (200 to 6500 hz) f-2.

  • Page 89

    Appendix f. Time series and spectrum graph information f.2 good sensors with noise the measurements graphed in figure f.2-1 and figure f.2-2 are made by the same sensor used for figure f.1-1 and figure f.1-2. However, for figure f.2-1 and figure f.2-2, a drill is running about ½ inch away from the s...

  • Page 90

    Appendix f. Time series and spectrum graph information figure f.2-2. Good sensor with noise (450 to 6500 hz) check the manufactures specification for the sensors frequency and excitation range before picking the begin/end frequencies and excitation voltage. Note f-4.

  • Page 91: Example

    Appendix g. Cr10x programming example although this example is for the cr10x, the cr23x is programmed similarly. ;{cr10x} ; ; ; *table 1 program 01: 900 execution interval (seconds) 1: do (p86) 1: 42 set port 2 high 2: beginning of loop (p87) 1: 0000 delay 2: 16 loop count 3: do (p86) 1: 73 pulse po...

  • Page 92

    Appendix g. Cr10x programming example g-2 10: z=x (p31) ;write decay ratio to inlocs 65-80 1: 95 x loc [ dcayratio ] 2: 65 -- z loc [ decay_1 ] 11: z=x (p31) ;write thermister resistance to inlocs 81-96 1: 96 x loc [ thrmister ] 2: 81 -- z loc [ therm_1 ] 12: z=x*f (p37) 1: 76 -- x loc [ therm_1 ] 2...

  • Page 93: Examples

    Appendix h. Additional programming examples h.1 avw200-controlled multiplexer h.1.1 direct rs-232 connection 'this is an example of a program used by a cr1000 and avw200 to control two am16/32b multiplexers. 'sixteen geokon 4450 vw displacement sensors are attached to each multiplexer and each senso...

  • Page 94

    Appendix h. Additional programming examples sample (16,displacement2(),fp2) sample (16,vwfreq2(),fp2) sample (16,temp2(),fp2) sample (16,amp2(),fp2) sample (16,sig2noise2(),fp2) sample (16,freqofnoise2(),fp2) sample (16,decayratio2(),fp2) endtable beginprog serialopen (comrs232,38400,0,0,10000) 'ent...

  • Page 95

    Appendix h. Additional programming examples 'assign coeficients listed in coefstring2 to individual variables for i = 1 to 16 splitstr (polycoef2(3*i-2),coefstring2(i),",",3,5) next i scan (2,min,0,0) paneltemp (ptemp,250) battery (batt_volt) avw200(vwresults(1),comrs232,0,15,mux1(1,1),1,1,16,1000,2...

  • Page 96

    Appendix h. Additional programming examples h.1.2 wireless/sensors with different frequencies ' 'this is an example of a program used by a cr1000 and avw206 to control two 'am16/32b multiplexers. Sixteen geokon 4450 vw displacement sensors are 'attached to each multiplexer and each sensor provides a...

  • Page 97

    Appendix h. Additional programming examples sample (16,displacement2(),fp2) sample (16,vwfreq2(),fp2) sample (16,temp2(),fp2) sample (16,amp2(),fp2) sample (16,sig2noise2(),fp2) sample (16,freqofnoise2(),fp2) sample (16,decayratio2(),fp2) endtable beginprog 'enter the 3 polynomial gage factors for e...

  • Page 98

    Appendix h. Additional programming examples scan (2,min,0,0) paneltemp (ptemp,250) battery (batt_volt) avw200(vwresults(1),comme,0,20,mux1(1,1),1,1,16,1000,2500,2,_60hz,1,0) for i = 1 to 16 amp1(i) = mux1(i,2) therm1(i) = mux1(i,6) vwfreq1(i) = mux1(i,1) sig2noise1(i) = mux1(i,3) decayratio1(i) = mu...

  • Page 99

    Appendix h. Additional programming examples h.2 datalogger-controlled multiplexer ' 'this example demonstrates how to program a cr1000 to collect measurements from sensors 'attached to four am16/32 multiplexers. The four multiplexers are controlled directly 'by the data logger, not through the avw20...

  • Page 100

    Appendix h. Additional programming examples sample (16,sig2noise2(),fp2) sample (16,freqofnoise2(),fp2) sample (16,decayratio2(),fp2) sample (9,displacement3(),fp2) sample (9,vwfreq3(),fp2) sample (9,temp3(),fp2) sample (9,amp3(),fp2) sample (9,sig2noise3(),fp2) sample (9,freqofnoise3(),fp2) sample ...

  • Page 101

    Appendix h. Additional programming examples 'gage factors for sensors attached to am16/32 #3 coef3(1) = 2.73949e-10: coef3(2) = 8.726e-5: coef3(3) = -0.20799 coef3(4) = 3.17163e-10: coef3(5) = 8.741e-5: coef3(6) = -0.19108 coef3(7) = 2.49866e-10: coef3(8) = 8.716e-5: coef3(9) = -0.20003 coef3(10) = ...

  • Page 102

    Appendix h. Additional programming examples portset(1,1) 'enable mux1 for i = 1 to 16 'do the following for each of 16 sensors: pulseport(2,1000) 'provide pulse to advance to next channel on mux1 delay (0,100,msec) avw200(vwresults,comrs232,0,15,mux(1),1,1,1,2500,3500,2,_60hz,1,0) 'make vw measureme...

  • Page 103

    Appendix h. Additional programming examples portset(7,1) 'enable mux4 for i = 1 to 32 'do the following for each of 32 sensors: pulseport(8,1000) 'provide pulse to advance to next channel on mux4 avw200(vwresults,comrs232,0,15,mux(1),1,1,1,2500,3500,2,_60hz,1,0) 'make vw measurement vwfreq4(i) = mux...

  • Page 104

    Appendix h. Additional programming examples h-12.

  • Page 105: I.1  Required Settings

    Appendix i. Using md485 multidrop modems with avw200 interfaces for situations where wireless communication is impractical, md485 multidrop modems may be used to extend the distance between the avw200 interfaces. This application is not compatible with sdi-12 communications. I.1 required settings de...

  • Page 106: I.2  Connections

    Appendix i. Using md485 multidrop modems with avw200 interfaces i.2 connections the point-to-point configuration is the simplest md485-to-avw200 network. In this configuration, two md485s are required (see figure i-2). The point-to-multipoint configuration uses several avw200s. In this configuration...

  • Page 107

    Appendix i. Using md485 multidrop modems with avw200 interfaces connects to another md485 via the cable2tp connects to the datalogger’s rs-232 port or the avw200’s rs-232 port via a null modem cable connects to earth ground via an 8 awg wire figure i-4. Md485 and its connectors. I.2.1 datalogger to ...

  • Page 108: I.3  Programming

    Appendix i. Using md485 multidrop modems with avw200 interfaces connect at one end only to chassis gnd. (-) (+) (-) (+) figure i-5. Md485-to-md485 connections and grounding i.2.3 md485 to avw200 the 18663 null modem cable is used to connect an md485 with an avw200. One end of the null modem cable at...

  • Page 109

    Appendix i. Using md485 multidrop modems with avw200 interfaces 'cr1000 series datalogger 'this program measures 2 sensors on 2 avw200s pba1 and pba5. 'each avw200 is connected to a md485 via a rs-232 null modem. The rs-232 baud rate of the md485s 'is 38.4 k as is the rs-485 baud rate. The md485s ar...

  • Page 110

    Appendix i. Using md485 multidrop modems with avw200 interfaces i-6.

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