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1. esses eene nnne trennen rene en rene ene enne tree tenerent nnns 34 6 3 4 Hardware Trigger Mode Laser Off H4 cesses nennen nennen nennen ren rennen 34 6 3 5 Measure Single Sample E tette rient eerte e etin eher tie E repre e oe petente ehe i aS 34 8 3 6 High Speed Sampling TIPS aia ra crasas 35 8 3 7 High Speed Single Sample Tips de d en a a sage das dct 35 8 4 MEASUREMENT RESOEUTION terere nb ia 35 8 5 SERIAE DATA RATE eterno ROI eI RR EIE OR oo UE 36 9 NONVOLATILE MEMORY STORAGE resiste eee enses tn seen tn seta su neta senten aestus essa seta sone to sensa sees en sea 37 9 CALIBRATION P 37 9 2 CONFIGURATI N NE ariei 37 9 2 1 Default Configuration ccccesccesccesecesecsseesseessesseeeceeseeseecesecesecesecsaecaaecsaeeseeeseesseesseeeeseneeeeesaeenaesnaeenaeens 37 9 2 2 Write Configuration Data Command W1234 eese teen rene nora conan ona cra cnica 37 9 2 3 Read Configuration Data Command R eese eene en rennen 37 9 2 4 Initialize Configuration Data Command I Except Serial eee 38 9 2 5 Initialize Configuration Data Command OS essent nennen rennen 38 9 2 6 Show Version Configuration Command V1234 cesses enne nennen 38 9 2 7 Show Version Command V
2. LASER ON LED and the function display LEDs The cable is for power and all communication serial analog limits and laser enable The housing of the sensor is anodized aluminum The front windows and the housing parts are sealed creating a dustproof splash proof enclosure e AR700 0125 AR700 AR700 AR700 B 2 2 250 57 7 0250 6 8 12 16 24 32 wa 1 2 4 4 2 1 2 4 i A 250 5200 10 09 19 09 82 6 132 1 256 5 485 4X 0 165 4 2 B 1125 1 125 150 1 50 Long cases 28 6 28 6 38 2 38 2 D3 mounting c 2125 2125 250 250 1 700 i 54 0 54 0 63 5 63 5 43 2 pi 3 020 4970 76 7 126 2 D1 D3 E 3 05 5 55 Emission 77 5 141 580 1 Indicator 4 00 8 00 114 7 i p3 101 6 203 2 p 0 625 0 625 0 67 0 67 F Pacer 2X 0 125 15 9 15 9 17 17 Path BE 0 500 2450 7 56 16 56 4 Short cases F s i E a D1 mounting 12 7 62 2 192 420 6 s NI Eg Beam Attenuator 2 9 1 895 48 1 O QU Acuity AR700 JANUARY 2008 o o N e e IS a Ej Typical Labels The Beam Attenuator is supplied for Class 3B sensor models Rotate the beam attenuator to block the laser aperture as required in your system The sensor will not operat
3. AR700 User s Manual A e Rev 1 4 12 08 36 cuity Laser Measurement 9 Nonvolatile Memory Storage The AR700 stores its configuration settings and calibration information in electronically erasable non volatile memory 9 1 Calibration The calibration information is specific to the sensor and cannot be changed by the user If the sensor cannot validate the calibration information when the sensor is turned on then the function display LEDs will flash code 08 and the sensor will continuously transmit the following message at 9600 baud using RS232 communication mode CALIBRATION DATA CORRUPTED RELOAD The sensor cannot be used if the calibration data is not valid Contact the factory for return instructions 9 2 Configuration 9 2 1 Default Configuration Default configuration values are stored for the configuration settings when the sensor is shipped and the default configuration settings may be restored at any time using the Default command The easiest way is to hold the function button down and then apply power to the sensor Once the function display LEDs start sequencing release the button and the configuration will be set to the default settings If the sensor cannot validate the configuration information when the sensor is turned on then the function display LEDs will flash code 06 and the sensor will continuously transmit the following message at 9600 baud default using RS232 communication mode default SAV
4. Acuity Laser Measurement AccuRange AR700 Laser Distance Gauge User s Manual Rev 1 4 For use with AR700 Rev 0 10 December 12 2008 Acuity A product line of Schmitt Industries Inc 2765 NW Nicolai St Portland OR 97210 www acuitylaser com AR700 User s Manual A Rev 1 4 12 08 Cuity Limited Use License Agreement YOU SHOULD CAREFULLY READ THE FOLLOWING TERMS AND CONDITIONS BEFORE OPENING THE PACKAGE CONTAINING THE COMPUTER SOFTWARE AND HARDWARE LICENSED HEREUNDER CONNECTING POWER TO THE MICROPROCESSOR CONTROL UNIT INDICATES YOUR ACCEPTANCE OF THESE TERMS AND CONDITIONS IF YOU DO NOT AGREE WITH THEM YOU SHOULD PROMPTLY RETURN THE UNIT WITH POWER SEAL INTACT TO THE PERSON FROM WHOM IT WAS PURCHASED WITHIN FIFTEEN DAYS FROM DATE OF PURCHASE AND YOUR MONEY WILL BE REFUNDED BY THAT PERSON IF THE PERSON FROM WHOM YOU PURCHASED THIS PRODUCT FAILS TO REFUND YOUR MONEY CONTACT SCHMITT INDUSTRIES INCORPORATED IMMEDIATELY AT THE ADDRESS SET OUT BELOW Schmitt Industries Incorporated provides the hardware and computer software program contained in the microprocessor control unit and licenses the use of the product to you You assume responsibility for the selection of the product suited to achieve your intended results and for the installation use and results obtained Upon initial usage of the product your purchase price shall be considered a nonrefundable license fee unless prior written waivers are obtained from Schmi
5. Example 225000 Set Zero Point to middle of range 0 to 50000 z Set Zero Point to current location U12500 Set Span Point at 1 4 of range Z represents the Zero Point Value U represents the Span Point value AR700 User s Manual Rev 1 4 12 08 29 Acuity Laser Measurement 6 4 1 Unbiased Analog Output X3 X4 Unbiased mode ignores the Zero Point and Span Point settings The analog voltage X4 or current X3 output is at a minimum at the near end of the measurement range and a maximum at the far end of the measurement range Measurement Z and U z don t care below no change 10 0 012 V 4 003 mA 19990 4 014 V 10 397 mA 20000 4 016 V 10 400 mA 20010 4 018 V 10 403 mA 49990 9 998 V 19 997 mA above no change 6 4 2 Zero Span Biased Output X1 X2 The Zero Point Z the measurement distance of the minimum analog output and the Span Point U the measurement distance of full scale analog output may be set anywhere within the measurement range of the sensor See Zero Point and Span Point section 5 2 6 The minimum distance between Zero Point and Span Point is 5 of the full sensor range Attempts to set a smaller span will be scaled such that the full analog output range will represent 5 of the sensor range Note that the full scale value may not be generated if its required location is outside the sensor s range Example ZP 49000 and SP 50000 5 of range 5 of 50000 is 2500 Actual ZP 49000 and the effec
6. 115200 0 230400 9600 Span Point U none Saves present location as Span Point 2 U50000 Unnnnn 0 Span 50000 where 50000 full scale Full J none Saves present location as Limit 1 Limit 1 luna 0 Limit 1 50000 where 50000 full scale 13 JO if J K then toggle limit2 limit1 if J gt 30000 then ON else OFF GOOD K none Saves present location as Limit 2 Limit 2 Knnnnn 0 Limit 2 50000 where 50000 full scale 14 K50000 if J K then toggle limit2 limit1 if J gt 30000 then ON else OFF GOOD 1 Zero Span Based Current Loop 4 20 ma 2 Zero Span Based Voltage 0 10 V XI Analog Output Control Xn 3 Unbiased Current Loop 4 20 ma 4 Cur 4 Unbiased Voltage 0 10 V Loop 5 Off Background Light Elimination l On Difference of AREAS sample with laser on off L1 Mode Ln 2 Off Laser is on for every sample mE 5 On 3 RP Selects Road Profile Mode In RP version only default in RP L3 RP v ot 1 Sample Quality has priority over sample rate P2 Sample Priority P2 2 Sample Rate has priority over sample quality Forced in RP mode g Rate 1 Send Error Code E1 E5 Q1 Error Report Mode Qn 2 Send prefix to output value above range limit 10 m f Code 3 Send output value above range limit the only binary error mode Read Configuration Data R none Restores saved settings also done at power on 10 Write Configuration Data Wnnnn 1234 Save the current settings 10 Initializ
7. Profiler and Range firmware revision serial number and information on whether the laser Is class 3B 9 2 7 Show Version Command V1235 This command causes the model firmware version and serial number of the sensor to be transmitted out the serial port AR700 User s Manual A e Rev 1 4 12 08 38 cuity Laser Measurement 10 AR700 Command Set The AR700 commands are used to operate the sensor change the sensor s configuration or check the configuration There are two different means provided to command the sensor although their capabilities doesn t completely overlap e Commands may be sent over the serial port The serial commands provide the best resolution for most settings but can t be used to set the Serial Communications Mode RS232 RS422 etc The serial commands use ASCII characters and any device that can communicate over a serial port may send the commands e Commands may be entered manually by using the function button and the function display LEDs The function button provides limited resolution but is required for setting the Serial Communications Mode Configuration settings may be retained through power cycling with the Write command see Nonvolatile Memory Storage section 9 10 1 Current Status Commands Z U J K M Several commands may be used to acquire the current location or current exposure as the command s parameter value When using these commands make sure the target is st
8. Units a low byte L a high byte H and a termination byte lt FF gt The low byte has a value of 0 to 255 The high byte has a value of 0 to 195 The termination byte always has a value of 255 For synchronizing note that the termination byte always 255 immediately follows the high byte never 255 To convert the two bytes to an output value use the following equation Bin3out H 256 L Distance Range Bin3out 50000 Just as in Native mode valid measurements are indicated by values between 0 and 50000 inclusive Errors are represented by values over 50000 Error 1 Target too near 2 Target not seen 3 Target too far 4 Laser Off value 50001 lt CR gt lt LF gt 50002 lt CR gt lt LF gt 50003 lt CR gt lt LF gt 50004 lt CR gt lt LF gt Offset Based Zero Point output is not available in binary mode no negative numbers 5 2 5 2 Byte Binary Data format N1 N3 LH In this mode each sample data output consists of 2 bytes a low byte L and a high byte H The low byte has a value of 0 to 127 The high byte has a value of 128 to 255 For AR700 User s Manual Rev 1 4 12 08 26 Acuity Laser Measurement synchronizing note that the bigger value H always follows the smaller value L To convert the two bytes to an output value use the following equation Bin2out H 128 128 L Distance Range Bin2out 16378 except errors Note Native 50000 Bin2out 1637
9. no output 1 Hardware transmit character disable by CTS 2 Serial Flow Control T 8 2 Off transmit not disabled Off 3 Software transmit sample disabled by CTRL S enabled by CTRL Q 10 Zero Based Native 1 Zero Based English Units 2 Zero Based Metric Units 3 Off A 4 Offset Based 5 Offset Based English 6 Offset Based Metric 1 Serial Output Control 11 7 Unbiased Native inch 8 Unbiased English 9 Unbiased Metric 11 Zero Based 3 Byte Binary N 12 Zero Based 2 Byte Binary 13 Unbiased 3 Byte Binary 14 Unbiased 2 Byte Binary Baud Rate Bl 7 1 300 2 1200 3 2400 4 4800 5 9600 6 19200 7 38400 8 57600 5 9 115200 10 230400 9600 2 Uses present location as Span Point 7 Spa Pomt U 2 2 0 3 10000 4 20000 5 30000 6 40000 7 50000 50000 Limit 1 1113 1 Uses present location as Limit 1 2 2 0 3 10000 4 20000 5 30000 6 40000 7 50000 0 m 2 Uses present location as Limit 2 7 Pus K 14 320 3 10000 4 20000 5 30000 6 40000 7 50000 50000 1 Zero Span Based Current Loop 4 20 ma 2 Zero Span Based Voltage 0 10 V 1 Analog Output Control X 4 3 Unbiased Current Loop 4 20 ma Cur 4 Unbiased Voltage 0 10 V Loop 5 Off 1 On 1 Background Light Elimination L 5 2 Off On 3 RP Road Profile version only default in RP version 3 RP T 1 Quality 2 Sample Priority ul as 2 Rate Forced in Road Profile mod
10. 16 different combinations in which the Q ee 1 28 2 9 3 33 LEDs can be illuminated to represent numbers They are shown here black dot ON Note that the LEDs are 498 5 v 6 9 illuminated in groups in a clockwise direction The first m S om illuminated LED is next to a number 1 4 7 or 10 Add 1 to 7 SS 8 3 9 e this number for each extra illuminated LED For example a number 8 has 7 as the first illuminated LED going 1088 1188 1288 clockwise plus one more is 8 13 14 and 15 don t fit this rule Oe 900 9 but the illumination patterns shown represent the indicated 1388 1488 1588 values 10 3 3 Function Button Displaying a Parameter Normally all function display LEDs are off and the LASER ON LED is on indicating normal operation There is no parameter number zero This condition indicates that the function display is idle no parameters are displayed Each momentary push of the function button less than one second will advance the display to the next parameter All parameters can be viewed in increasing order one at a time After the last parameter a momentary push of the function button cycles the display back off For each parameter displayed the setting for that parameter is displayed on the setting LEDs The setting LEDs will display 0 all off if the parameter s current setting does not match one of the possible selections available from the function button For example there are nearly a million poss
11. OFF L2 and will reduce the sampling speed by up to 50 Priority must be set to Rate P2 to assure sampling takes place at the specified rate 8 3 7 High Speed Single Sample Tips The speed of single sample operation is further hindered Several operations that are overlapped during normal operation must be performed in sequence during single sample operation particularly at high speed The maximum exposure time for single sampling is controlled by the S command as if the sensor were in continuous sampling mode The single sample rate can be increased slightly by using the exposure limit command M to reduce the exposure Note that reducing the exposure can also reduce the signal quality Use commands S21 L2 and P2 to get the fastest rate Use M34 to get a maximum rate of about 4500 samples per second Reducing the value to M13 will not make a significant difference in sample speed From M12 to M2 the maximum rate may increase slightly At M2 the rate may exceed 5200 samples per second but the low exposure may result in no sample signal At M40 the maximum single sample rate is about 3450 Above M40 the M command is no longer influencing an increase in the single sample rate 8 4 Measurement Resolution The sensor output data was described in the sections on Serial Data Output and Analog Output where the resolution is defined in terms of how many digits are calculated for the results This section discusses measur
12. Sample Exposure and Priority P Each scan cycle camera scan is checked for the correct exposure The sensor controls the exposure by varying the strength of the laser beam and the camera s shutter time For optimal speed performance the laser power is increased before the shutter time is increased Shorter exposure times generally occur with more reflective targets measurements that are closer to a sensor shorter range and with higher power lasers Longer exposure times generally occur with less reflective targets measurements that are farther from a sensor longer range and with lower power lasers Note that because each exposure is based on what the camera saw on the previous scan cycle there can be a delay of several scan cycles in acquiring the correct exposure If the reflectance characteristics of the target are changing rapidly then the required exposure is constantly changing and correcting For fast changing targets position or texture the quality of the measurement will be reduced When the exposure time is greater than the requested sample period S command then the priority command determines how the camera s shutter time is calculated 8 2 2 1 Quality sets Priority P1 default In this mode the sample rate may be slowed down from the programmed value in order to attain the optimum shutter time If the sample rate is slowed then that rate is uncontrolled 8 2 22 Rate sets Priority P2 forced in Road P
13. Un E e E EE E Berk ned 18 4 1 2 Shield Clear A a oium A a AES 19 4 1 3 Serial Communications Green Yellow Blue Violet esses essent 19 4 1 4 Analog Output Brown Orange cesses eene enne tentent teste ener etre eene tenente nnne 19 4 1 4 1 4 20 mA Current Loop Output Orange cesses enne nne neen trennen rennen ene 20 4 1 4 2 0 10 V Voltage Output Orange cesses eene nennen rene rennen tne nnee tenerent entren 20 4 1 5 Limit Ouiputs Pink Gray nette ide 21 4 1 6 Laser Disable and Trigger White eese eese eene nnene trennen trenes 21 4 2 OTHER INTERFACES P 22 4 2 1 Optional Interface Kit with Serial Cable and Power Supply eene 22 4 2 2 INTEL dig ida 22 4 2 3 OEM Models Class 3B without Interlock BOX eese eene eene eene nnne enne 22 5 SERIAL INTERFACE OPERATION e ecce eres eee eene tons ense ense ta setas eta seta sete sesso asse sse eo ss sa setas tuse tasto sea 23 5 1 SERIAL HARDWARE INTERFACE ieeeeeeeeeeeeeeenee nennen nennen nee tenete RR RR nn RD tene tree tree teen teen trennen eterne ene 23 5 1 1 Serial Communication Mode RS232 RS422 ccccccccssccccesssecsessececusscecesenscecesseeeecsssaeeesseaeeceesaeeesnesaeeeens 23 5 1 1 1 RS232 function button parameter 9 setting 1 default eee 23 5 1 1 2 RS422 function button parameter 9 setting 2 essen
14. area are changing rapidly In this case the light measured during the laser on exposure may be different from that during the laser off exposure reducing the benefits of this mode The total time required for obtaining a sample in this mode will be approximately twice what it is with background light elimination OFF If the sensor cannot detect a distinct peak in the camera data or the measurement is just beyond the end of the full scale range but with the spot still on the camera near one end the sensor will AR700 User s Manual Rev 1 4 12 08 10 Acuity Laser Measurement output zero distance If there is no target in the measurement range and background light elimination is on the sensor will generally put out zeros However if lighting conditions are changing rapidly or if background light elimination is off a bright spot can be misinterpreted as the laser spot and generate a false distance reading when there is no target in range Reducing the Exposure Limit can eliminate this problem in most cases 2 2 Mechanical Dimensions The following diagram shows the mechanical dimensions for the small AR700 For this unit the rectangular window on the front contains both the laser exit port and the return light collection optics In larger units the exit port and collection optics have separate windows The sensor has two 4 M3 clearance holes for mounting the sensor The rear face of the sensor has the cable the function button the green
15. camera requires more time to acquire a sufficient image for measurements Two other commands affect the operation that may cause the samples to be generated at a slower rate 1 4 7 2 Background Light Elimination L The default setting for Background Light Elimination BLE is ON L1 In this mode the camera makes two measurements one with the laser on and one with the laser off and subtracts them to remove the effects of background lighting When BLE is OFF L2 the sensor captures a single image and uses it alone to generate the output Therefore for any given exposure required by the camera the sample rate with BLE ON is half of the sample rate available with BLE OFF Type L2 in HyperTerminal to turn BLE OFF The measurement of brightly illuminated targets with shiny facets may be improved with BLE ON If the environmental lighting is changing rapidly the improvement may be reduced Note that most non incandescent lighting is turning on and off 120 times per second 1 4 7 3 Sample Priority P The default for the Sample Priority setting is RATE P1 In this mode the Sample Rate takes priority over sample quality by limiting the camera exposure time In order to guarantee that samples have sufficient exposure time change the priority to QUALITY P2 by typing P in HyperTerminal The Sample Rate if reduced by QUALITY mode isn t easily determined 1 4 7 4 Serial Output Rate Considerations It is common to re
16. culty Laser Measurement 5 2 6 2 Zero Based Output Units A0 Al default A2 NO N1 This mode reports the distance as positive from the Zero Point value zero up to the limit of the sensor No negative values are transmitted Measurement Z 20000 U gt 20000 Z 20000 U lt 20000 below 50001 50001 10 50001 19990 19990 50001 10 20000 0 0 20010 10 50003 49990 29990 50003 above 50003 50003 5 2 6 3 Offset Based Output Units A4 A5 A6 This mode reports the signed distance from the Zero Point value up to the limit of the sensor This mode is not available in binary modes no negative numbers Measurement below 10 19990 20000 20010 49990 above AR700 User s Manual Rev 1 4 12 08 Z 20000 U gt 20000 50001 19990 10 0 10 29990 50003 28 Z 20000 U lt 20000 50001 19990 10 0 10 29990 50003 Acuity Laser Measurement 6 Analog Output Operation X The analog output uses two wires not used in the basic configuration The output is Orange and the return is Brown The return wire is connected to ground inside the sensor and should not be connected to ground outside the sensor Three modes Voltage Current Loop or Off may be selected with the Analog Output Control command The analog output is updated with each sample measured The analog output can keep up with the sensor s fastest measurement rate The analog output is not updated does not chan
17. culty Laser Measurement 8 Performance Optimization 8 1 Sample Definition A Sample consists of one or more scan cycles A scan cycle is performed in the sensor by scanning its camera Scan cycles are performed continuously and as fast as possible in the sensor and then reported at the Sample Rate If more than one scan cycle is performed during a Sample Period then the results of those cycles are averaged allowing slower sample rates to be less noisy Note that there is not a direct time correlation between scan cycles and samples One or more scan cycles take place and are averaged within a sample period but the exact time of those scan cycles are not known within the sample period Samples are not completed at an exact rate but at an average rate with a small amount of fluctuation The fluctuation is on the order of 30 microseconds so it would only make a noticeable difference at very high sample rates 8 2 Sample Interval S The Sample Interval command S controls the maximum average Sample Rate Its parameter has a resolution and units of 5 us micro seconds The command accepts parameter values from SO to S999999 Note that any value below S22 is taken as S21 maximum rate is about 9434 samples per second The sample frequency and period are calculated as Sample Rate 200000 S samples per second Sample Period 2 5 S microseconds per sample The minimum sample rate is 200000 999999 0 5 samples per second
18. display LEDs Troubleshooting shooting steps are shown below Trouble Symptom Possible Cause Correction LASER ON LED never turns on Power lines not connected Power lines reversed polarity Power supply voltage too low or too high Check wire connections Check wire connections Check power supply voltage when loaded No laser light and no sample data Sampling is turned off Serial output is turned off Power supply voltage is too low Ambient light level is too high Turn Sampling on Turn Serial Output mode on Check power supply input voltage Reduce the ambient light level Function display LEDs flash pattern POS6 Configuration data lost Press function button default configuration is loaded Function display LEDs flash pattern POS8 Calibration data lost Call Schmitt Industries for instructions Function display LEDs flash pattern POS10 Waiting for Class 3B laser to start This time out finishes in 5 seconds AR700 User s Manual Rev 1 4 12 08 Acuity Laser Measurement 3 5 1 Serial Communications Check If no information is received over the serial port check the power supply and serial wire connections The sensor may be in a configuration that prevents serial communication such as being set at the wrong baud rate To reset the sensor to the default Turn the power off press the function button on the AR700 and turn th
19. display will not show the function that was activated but instead revert to the current parameter setting If a setting has been flashing for ten seconds without a push of the function button then the function display will return to displaying the current setting not flashing AR700 User s Manual A Rev 1 4 12 08 41 culty Laser Measurement 10 3 5 Function Display Error Codes The function display error codes will display by flashing all LEDs Typical error codes have the parameter LEDs all off so they don t flash while the setting LEDs flash Common codes are shown in the Troubleshooting section 10 4 Saving the Configuration Any configuration changes will not be saved unless a Write Configuration Data command is issued before turning off the power This can be done using either serial communications or the function button The serial command is W1234 The function button is parameter 10 setting 9 Push the function button 10 times Ps until parameter 10 is displayed on the parameter LEDs Push and hold the function button until the setting LEDs flash Push the function button several times until the So setting LEDs flash the code for 9 Push and hold the function button until the 1 setting LEDs stop flashing The configuration is saved AR700 User s Manual Rev 1 4 12 08 42 Acuity Laser Measurement 11 Serial Command Quick Reference The maximum number of digits is shown Example Snnnnnn indicates
20. of any hardware and software not meeting Schmitt Industries Limited Warranty and which is returned to Schmitt Industries Incorporated or an authorized Schmitt Industries dealer with a copy of your purchase receipt or 2 if Schmitt Industries Incorporated or the dealer is unable within ninety 90 days to deliver a replacement product which is free of defects in material or workmanship you may terminate this Agreement by returning the product and your money will be refunded to you by the dealer from whom you purchased the product IN NO EVENT WILL SCHMITT INDUSTRIES INCORPORATED BE LIABLE TO YOU FOR ANY DAMAGES INCLUDING ANY LOST PROFITS LOST SAVINGS OR OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE SUCH PRODUCTS EVEN IF SCHMITT INDUSTRIES INCORPORATED OR AN AUTHORIZED DEALER HAD BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR FOR ANY CLAIM BY ANY OTHER PARTY SOME AREAS DO NOT ALLOW THE LIMITATIONS OR EXCLUSION OF LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU GENERAL You may not sublicense assign or transfer the license or the hardware software and documentation except as expressly provided in this Agreement Any attempt otherwise to sublicense assign or transfer any of the rights duties or obligations hereunder is void This Agreement will be governed by the laws of the United States and the State of Oregon United States of America
21. setting EXCEPT for the Serial port communication mode and baud rate The Write Configuration Data command must be used to save these settings permanently 9 2 5 Initialize Configuration Data Command Q8 This Initialize Configuration Data command is used to immediately restore the complete default configuration setting The Write Configuration Data command must be used to save these settings permanently 9 2 6 Show Version Configuration Command V1234 This command causes the current configuration settings and other information about the sensor to be transmitted out the serial port If sampling is on use a data capture program to save the information in a file for viewing Sampling can be turned off H2 to keep the information from scrolling off the screen but that changes the sampling mode that is displayed by the command The following is sample output from the command AR700 0 500 Rev 0 10 Copyright 2007 2008 Schmitt Industries Inc Zero Point 0 Span Point 50000 Sample Interval 40000 Analog Output Mode Zero Based Current Background Light Elimination On Sampling Mode On Serial Mode RS232 Baud Rate 9600 Output Data Zero Based English Error Mode Code Sample Priority Rate Serial Output Flow Control Off Limit 1 0 Limit 2 50000 Exposure Limit 80 Class 3B NO Serial Number 000001 In addition to the configuration settings the output contains the sensor s model Road
22. 1235 esses esee corno nn nn nono nnnn enter sene eren nennen nnne 36 10 AR700 COMMAND SET A nocorrcrccnconconones 39 10 1 CURRENT STATUS COMMANDS Z U J K M arrra iieri N EEA EENE EE EEE 39 10 2 SERIAL COMMAND OPERATION y csssssrccvevcesecueranventestevnetaviuseseesedvogsevonsoubensvecneusaestdenedsontevaegecverduvestevaesee eys 39 10 2 1 Serial Command Communications eee esee eese en ene neon anne nen tenete trennen teret netten en teneret 39 102 2 Serial Command Format gc Re di 39 10 2 3 Serial Command Execution cue etie Rete et e te Ee cad De N E e RECS NE GERNE e FEE ER T See Vane UNE Ede E EE ENRUE 40 10 2 4 Serial Command Response aes eet Ne ct thes Sg eoa co ther aee shes nan dae Rn spen Ede eae R nA 40 10 3 FUNCTION BUTTON COMMAND OPERATION cese eene enne enne concen cn ennn rnit innen ene ennn nn enn 40 10 3 1 Function Display LEDSs iate tee ino 40 103 2 Function Display LED COdeS iet eris e etta tee ete tate ngs esos suites cas iwens RUE Rea eins s Cres 4I 10 3 3 Function Button Displaying a Parameter eese eee enne tente nennen rennen entente 4I 10 3 4 Function Button Changing a Setting esses eene eene nennen tren teen trennen eren entente 4I 10 3 5 Function Display Error Codes eese eerte enne thee teen tren teen teen retener ense 42 10 4 SAVING THE CONFIGURATION lt ses sscssscccesecntsetenesctovi
23. 2 1 Standalone Cabling To use the AR700 without a serial connection to a host computer the only connections necessary are the power and ground wires the analog output wires and optionally the limit output wires connecting to your data display recording or control equipment See Signal and Power Interface section 4 for wire connections In its default configuration the AR700 will begin measuring and transmitting measurement data on power up In 4 20mA analog output mode the best accuracy and linearity for the current loop is obtained with a 500 ohm load to current loop return at the measurement point converting it to a voltage of 2 10V The limit outputs can be used to indicate the analog output validity In 0 10V analog output mode the best accuracy and linearity for the voltage output is obtained with a 10K ohm load to the voltage output return at the measurement point The limit outputs can be used to indicate the analog output validity In limits only mode one or both of the two limit output wires can be used to connect to control equipment Using both wires allows the sensor measurement validity to be indicated 3 2 2 Connection to a Host Computer A 9 pin serial D sub serial connector can be attached to the serial output wires to connect the AR700 directly to an IBM PC compatible 9 pin serial port Connect a 15 volt power supply to the power and ground lines of the sensor cable See Signal and Power Interface section 4 for
24. 6 digits maximum R 700 Configuration Data Settings Serial Function Button lm r Default Command Name Serial Command Serial Code Function Parameter Sample Interval Snnnnnn 21 Interval 999999 5us increments f 200 000 S 3 pisi Z none Saves present location as Zero Point Zero Pomt Znnnnn 0 Zero Point 50000 where 50000 full scale EN 1 On continuous output laser is on 2 Off laser is off no output H1 Sampling Control Be 3 Off laser is on no output but tracks exposure 6 On 4 Hardware Trigger Mode laser is off no output 1 On Hardware Any chars Transmit only if CTS is true T2 Serial Flow Control Tn 2 Off Always transmit 8 Off 3 On Software CTRL S stops sample output CTRL Q allows 0 Zero Based Native 0 50000 Zero Point Subtracted negatives 0 1 Zero Based English Units 2 Zero Based Metric Units 3 Off An 4 Offset Based Native Zero Point subtracted negatives reported 5 Offset Based English 6 Offset Based Metric AI Serial Outp t Control 7 Unbiased Native Zero Point ignored H in 8 Unbiased English 9 Unbiased Metric 0 Zero Based 3 Byte Binary Nn 1 Zero Based 2 Byte Binary 2 Unbiased 3 Byte Binary 3 Unbiased 2 Byte Binary Baud Rate Bn 1 300 2 1200 3 2400 4 4800 5 9600 6 19200 7 38400 8 57600 7 B5 9
25. 8 except errors In this mode valid measurements are indicated by values between 0 and 16378 inclusive Errors are represented by values over 16378 Error value 1 Target too near 16379 lt CR gt lt LF gt 2 Target not seen 16380 lt CR gt lt LF gt 3 Target too far 16381 lt CR gt lt LF gt 4 Laser Off 16382 lt CR gt lt LF gt Offset Based Zero Point output is not available in binary mode no negative numbers 5 2 6 Zero Point Z Span Point U NOTE The Zero Point Z and Span Point U parameters may also affect the Analog Output The location of the Zero Point may be changed with the Zero Point command Z The direction of increasing output serial values from the Zero Point may be reversed by issuing the Span Point command U with a value smaller than that used in the Zero Point command Example Z25000 Set Zero Point to middle of range 0 to 50000 z Set Zero Point to current location U12500 Set Span Point at 1 4 of range Z represents the Zero Point Value U represents the Span Point value 5 2 6 Unbiased Output Units A7 A8 A9 N2 N3 This mode reports the distance without applying the Zero Point value The Zero Point value can still be applied to the analog output Measurement Z 20000 U gt 20000 Z 20000 U 20000 below 50001 50001 10 10 10 19990 19990 19990 20000 20000 20000 20010 20010 20010 49990 49990 49990 above 50003 50003 AR700 User s Manual A Rev 1 4 12 08 27
26. ED SETTINGS INVALID USING DEFAULT Pushing the function button will stop the light from flashing stop the error message from transmitting and will start the sensor using the default configuration The sensor can also send this message as the result of the Read Configuration Data command with configuration data that is not valid The default settings described in this manual are the standard default settings Custom default settings may be generated by special factory order 9 2 2 Write Configuration Data Command W1234 The commands used to change the configuration do not automatically store the changes to the nonvolatile memory The Write Configuration Data command must be used to make these changes permanent The Write Configuration Data command stores all of the current configuration settings so it can be used after making several changes The Write command should not be issued repeatedly under computer control since the nonvolatile memory expected lifetime is 1 000 000 writes 9 2 3 Read Configuration Data Command R The Read Configuration Data command is used to restore the saved configuration from nonvolatile memory and will immediately replace the sensor s configuration settings AR700 User s Manual A Rev 1 4 12 08 37 cuity Laser Measurement 9 2 4 Initialize Configuration Data Command I Except Serial This Initialize Configuration Data command is used to immediately restore the default configuration
27. Example S40 Sets the sample rate to 5000 per second 200000 40 The maximum possible sample rates are limited by the sensor internal processes Two configuration settings can limit the actual or maximum sample rate 8 2 1 Background Light Elimination BLE L BLE or Background Light Elimination is controlled by the Background Light Elimination Mode command L 8 2 1 1 BLE ON L1 default When BLE mode is ON the sensor scans its camera two times per scan cycle once with the laser off and once with the laser on The two scans are subtracted to enhance the laser image and reduce the background image The maximum sample rate with BLE ON is about 4717 samples per second S lt 43 8 2 1 2 BLE OFF L2 When BLE mode is OFF the sensor scans the camera once per scan cycle and processes the image This can be done at twice the speed as with BLE ON because the camera is scanned half as often per scan cycle The maximum sample rate with BLE OFF is 9433 samples per second S lt 22 AR700 User s Manual A Rev 1 4 12 08 32 culty Laser Measurement 8 2 1 3 ROAD PROFILING L3 Default in Road Profiler Models section 1 5 This is the mode of operation is allowed only in Road Profiler models This mode behaves as if BLE is OFF section 8 2 1 2 and forces RATE Priority section 8 2 2 2 It is described in detail in section 1 5 An attempt to set this mode in a standard non RP model will be ignored 8 2 2
28. NSE IS AUTOMATICALLY TERMINATED TERM The license is effective until terminated You may terminate it at any other time by returning all hardware and software together with all copies of associated documentation It will also terminate upon conditions set forth elsewhere in this Agreement or if you fail to comply with any term or condition of this Agreement You agree upon such termination to return the hardware and software together with all copies of associated documentation In the event of termination the obligation of confidentiality shall survive 12 MONTH LIMITED WARRANTY EXCEPT AS STATED BELOW IN THIS SECTION THIS PRODUCT IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Schmitt Industries Incorporated does not warrant that the functions contained in the product will meet your requirements or that the operation of the product will be uninterrupted or error free Schmitt Industries Incorporated does warrant as the only warranty provided to you that the product which is furnished to you will be free from defects in materials and workmanship under normal use for a period of twelve 12 months from the date of delivery to you as evidenced by a copy of your warrant receipt LIMITATIONS OF REMEDIES Schmitt Industries Incorporated s entire liability and your exclusive remedy shall be l the replacement
29. Should you have any questions concerning this Agreement you may contact Schmitt Industries Incorporated by writing to Schmitt Industries Incorporated 27765 NW Nicolai St Portland Oregon 97210 USA YOU ACKNOWLEDGE THAT YOU HAVE READ THIS AGREEMENT UNDERSTAND IT AND AGREE TO BE BOUND BY ITS TERMS AND CONDITIONS YOU FURTHER AGREE THAT IT IS THE COMPLETE AND EXCLUSIVE STATEMENT OF THE AGREEMENT BETWEEN YOU AND SCHMITT INDUSTRIES INCORPORATED AND ITS DEALER US WHICH SUPERSEDED ANY PROPOSAL OR PRIOR AGREEMENT ORAL OR WRITTEN AND ANY OTHER COMMUNICATIONS BETWEEN US RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT AR700 User s Manual A e Rev 1 4 12 08 cuity Laser Measurement Procedures for Obtaining Warranty Service 1 Contact your Acuity distributor or call Schmitt Industries Inc to obtain a return merchandise authorization RMA number within the applicable warranty period Schmitt Industries will not accept any returned product without an RMA number 2 Ship the product to Schmitt Industries postage prepaid together with your bill of sale or other proof of purchase your name address description of the problem s Print the RMA number you have obtained on the outside of the package This device has been tested for electromagnetic emissions and immunity and has been found to be in compliance with the following directives for class A equipment EN 61000 6 2 2001 EN 61326 1997 Amended by A1 1998 and A2 2001 and A3 2003 T
30. Wavelength nm Power Limit mW Safety Classification Color 650 1 Class 2 Red 670 5 Class 3R Red 660 25 Class 3B Red Acuity AR700 Acuity AR700 Schmit Measu rement S de Schmitt Mess rement S Ce 2765 NV N Nico ola 2765 NW Nicolai St Po 721 Fortiand OR 97210 Ac uity AR7OO tS CE W C ITH LASER i NOTIC E 50 AND E 50 EC EN amp 0825 1 2001 NOS attt The laser safety classification reflects worst case situations The laser is considered to be continuous not pulsed When the laser pulses in normal operation the level of laser light does not increase The housing is sealed with tamper resistant fasteners Do not attempt to open the sensor A higher level of laser light could be accessible inside 2 6 Sensor Maintenance The AR700 sensor requires little maintenance from the user The sensor window s should be kept clean of dust buildup as a part of regular preventative maintenance Use compressed air to blow dirt off the window or use delicate tissue wipes and a light solvent such as isopropyl alcohol AR700 User s Manual A Rev 1 4 12 08 13 Acuity Laser Measurement or water Avoid using pressurized water and do not use abrasive wipes on the optical glass If your sensor does not function according to specifications contact Schmitt Industries Inc The housing is sealed with tamper resistant fasteners Do not attempt to open the sensor It is not user serviceable A higher level of laser light
31. able and the sensor is actively measuring the target sampling is not off etc to ensure that a valid measurement is acquired for the command 10 2 Serial Command Operation The sensor is always receptive to serial commands Once a command is recognized as complete it is executed immediately 10 2 1 Serial Command Communications Serial commands may only be processed when the serial port characteristics match the serial communications mode and baud rate Use the function button to set the Serial Communications Mode RS232 or RS422 Although the baud rate may be set using the serial commands it may be easier to set the baud rate using the function button 10 2 2 Serial Command Format ASCII commands have a general form of a command letter an optional parameter value made of up to 6 numeric digits and may optionally have a terminating character Each command letter represents a different command The letter is not case sensitive It may be upper or lower case Some commands do not have parameters They are executed as soon as the letter is received The remaining commands may be followed by a parameter value made of up to six numeric digits The maximum number of digits depends on the individual command For some commands the parameter is optional Commands with incorrect parameters are ignored The following all send a valid Sample Interval command with parameter 50 AR700 User s Manual A e Rev 1 4 12 08 39 cui
32. between limits inclusive J lt K This mode is determined by the J parameter having a value less than the K parameter Limit 1 is ON for a measurement that is invalid or lt J including below range Limit 1 is OFF for a measurement that is valid and gt J including above range Limit 2 is ON for a measurement that is invalid or gt K including above range Limit 2 is OFF for a measurement that is valid and lt K including below range This mode is default J20 K 50000 7 2 Limit Switches both ON between limits inclusive J gt K This mode is determined by the J parameter having a value greater than the K parameter Limit 1 is ON for a measurement that is valid and lt J including below range Limit 1 is OFF for a measurement that is invalid or gt J including above range Limit 2 is ON for a measurement that is valid and gt K including above range Limit 2 is OFF for a measurement that is invalid or lt K including below range 7 3 Limit Output Toggle J K for Analog Output Timing This mode is determined by the J parameter having a value equal to the K parameter The Limit outputs change at the same time the analog output changes If J K lt 30000 then Limit 1 is OFF for any valid measurement and ON if invalid If J K gt 30000 then Limit 1 is ON for any valid measurement and OFF if invalid Limit 2 toggles from ON to OFF or OFF to ON for every sample valid or invalid AR700 User s Manual A Rev 1 4 12 08 31
33. cecseseececsccecessaececsesaeeecseaceceesaeeecsesaeeecseseeeesaeeeceeaeeesseaeeeees 7 1 4 1 MOUNTING ql o 7 1 4 2 Power Sinal isse eie tested eee diver iate tree ede seu teste iecto erat eder lr 7 1 4 3 Sertal DIGIC VETAT TT 7 1 4 4 Analog Output SUNS id cas 7 1 4 5 Mu mecum 7 1 4 6 Laser Disable Wi UM E M UD odiados 8 1 4 7 Important Configuration Considerations eee esee eene tentent tren eren ren reete terne amp 1 4 7 1 Sample Interval 5 ES 8 1 4 7 2 Background Light Elimination L eese eee nnne eerte 1 4 7 3 Sample Priority D eee peior Rias rapaces 8 1 4 7 4 Serial Output Rate Considerations eee esee eee eene nete trennen nennen enne enne nee amp 1 5 ROAD PROFILE OPERATION ROAD PROFILER MODELS ONLY essere nennen enne 9 2 GENERAL DESCRIPTION ite eee eva sehe evene na Ee uoo Qon ee Oo See Ene pee eCa E IKCE NEC PAPAE NOE TREE FE PE OH UN SESS SEHR ERE VS EO UNES SEVERE IR 10 2 1 PRINCIPLES OF OPERA TION quanto 10 2 2 MECHANICAL DIMENSIONS dica 11 2 3 ELECTRICAL INSTALLATION ali 12 2 4 MECHANICAL OPTICAL INSTALLATION ccecsssescecececeessesecececsensesececsceeseuaeseceeecseseaaseeeseeesessanseeeeeees 12 2 5 LASER gb e SENEESE 13 2 6 SENSOR MAINTENANCE ccccesssssssececececsesseaececccecsesnauececececsensaaececececseseaaeaeceeeceeseaeaeseeeeee
34. cond or a 0 1 uF capacitor 100 samples per second 4 1 4 2 0 10 V Voltage Output Orange In Voltage mode the Orange wire delivers a voltage proportional to the measured distance A load resistance of 10K ohms or more may be connected between the orange and brown wires in this mode Note that the output voltage does not go all the way to zero but the output is linear from about 10 mV at position 0 to 10 V See Analog Output Operation section 6 for mode selection and scaling options The sensor may be connected directly to a meter or a filter may be inserted to reduce noise The filter shown will pass the signal at full speed nearly 10000 samples per second To filter better at slower speeds use a 0 01 uF capacitor 1000 samples per second or a 0 1 uF capacitor 100 samples per second ORANGE MNW DC VOLTS 10K FROM AR700 SENSOR VOLTAGE MEASUREMENT DEVICE BROWN COMMON AR700 User s Manual Rev 1 4 12 08 20 Acuity Laser Measurement 4 1 5 Limit Outputs Pink Gray The Pink wire is the Limit 1 Output The Gray wire is the Limit 2 Output See Limit Output Operation section 7 for operation options and details Each Limit Output is an open collector NPN transistor switch to Ground When a Limit Output is not active its output will be high impedance and no current will flow through it When a Limit Output is active On it can sink up to 100mA of current A current limiting circuit
35. could be accessible inside The accuracy of the unit will be degraded if the sensor is opened 2 7 Sensor Service The AR700 sensor has no user serviceable parts Refer all service questions to Schmitt Industries Inc The housing is sealed with tamper resistant fasteners Do not attempt to open the sensor A higher level of laser light could be accessible inside The accuracy of the unit will be degraded if the sensor is opened 2 8 Environmental Materials The AR700 is produced in compliance with the RoHS directive regarding reduction in the use of lead and other hazardous substances 2 9 Sensor Specifications Go to http www acuitylaser com AR700 sensor technical data shtml AR700 User s Manual A Rev 1 4 12 08 14 culty Laser Measurement 3 Installation and Checkout 3 1 Mounting Mount the sensor in such a way that the unit is not twisted or warped Using three hard points along the front and back edges or a slightly compliant mounting system are the best methods Do not clamp or squeeze the sensor excessively If the sensor is distorted the sensitivity and accuracy may be affected 3 2 Cabling The AR700 has a multipurpose cable with solder tail wires If the AR700 is ordered with a power supply the sensor cable will be connected to the power supply Connection and termination according to the instructions is essential for correct sensor operation Read the wire descriptions for connection information 3
36. cters Ctrl S and Ctrl Q It will stop the flow of serial sample data after Ctrl S is received The sensor will resume the flow after Ctrl Q is received Non sample data information will be transmitted regardless of the flow control characters Show Version command for example This mode stops the transmission of complete samples Once the first character of a sample is transmitted all the characters of the sample will transmit 5 1 4 Input Flow Control The sensor provides hardware input flow control in RS232 mode using the RTS signal which is set active to indicate that the sensor is able to receive at least two more characters Hardware flow control is not operational in RS422 mode The sensor does not transmit software flow control characters Ctrl S and Ctrl Q If the host is transmitting command sequences that are more than 10 bytes in length pause for 0 1 seconds between commands 5 2 Serial Data Output A N The Serial Data Format units and offsets modes are selectable using the Serial Output Control command Serial data is transmitted from the AR700 as 8 data bits with no parity and 1 stop bit The sample data sent represents calibrated distance readings Available units are Native 0 to 50000 English Metric and Short 0 to 16378 Output Formats are ASCII 3 byte binary and 2 byte binary Adjustable offset modes are Unbiased Zero Based and Offset Based 5 2 1 Serial Output Off A3 In this mode no seria
37. cuity Laser Measurement 5 Serial Interface Operation 5 1 Serial Hardware Interface The serial port hardware mode can operate in RS232 or RS422 mode The hardware mode can not be selected using a serial command and must be selected through the use of the function button The default serial port mode is RS232 In RS422 terminated mode the serial port is set for full duplex transmission with an internal 120 ohm termination connected between the receiver pair s wires In RS422 unterminated mode the serial port is set for full duplex transmission and the 120 ohm termination is not connected 5 1 1 Serial Communication Mode RS232 RS422 The Serial Communication Mode command is used to set the hardware communication mode used by the sensor It can only be set using the function button See Function Button Command Operation section 10 3 for instructions 5 1 1 1 RS232 function button parameter 9 setting 1 default Pes This command sets the serial communications mode to RS232 using four je signals TX RX CTS and RTS AM 5 1 1 2 RS422 function button parameter 9 setting 2 Pes This command sets the serial communications mode to RS422 with no ie termination provided Two signal pairs TX and RX use four wires CTS and OO RTS are not available 5 1 1 3 RS422 Terminated function button parameter 9 setting 3 P This command sets the serial communications mode to RS422 with and internal soe 120 Ohm term
38. d A standard 9 pin D SUB serial connector is provided in the interface box It provides the pin out described in the Serial Communications subsection above In addition it ties pins 4 DTE Ready 6 DCE Ready and 1 DCD together a standard connection used with a PC A standard 9 pin cable is supplied to connect the interface box to a PC The interface box has a jack to accept the plug from a standard 15V Power Supply also supplied with the Interface Kit 4 2 2 Interlock Box The Interlock Box option may be added to sensors with a Class 3B lasers in order to provide some of the safety features required for compliance with laser regulations It provides the same features as the Interface Kit and also includes a beam attenuator a key switch a laser interlock connector and a second laser emission indicator 4 2 3 OEM Models Class 3B without Interlock Box A Class 3B sensor that doesn t have the Interlock Box option is for use only as a component for incorporation into a system that must include all applicable safety components prior to use It is the responsibility of the installer to ensure that the complete system meets all applicable safety standards for Class 3B laser products This may include but not be limited to a beam attenuator compliant power supply interlocks and safety switches emission indicators and user warning labels that may be required to be visible during use AR700 User s Manual Rev 1 4 12 08 22 A
39. e Rate 1 Codes E1 E5 1 Error Report Mode Q 10 2 Send prefix to values above range limit Code 3 Send output value above range limit the only binary error mode Read Configuration Data R 10 6 Restore saved settings Write Configuration Data W 10 9 Save the current settings Initialize Configuration Date I 10 7 Restore Default excluding Serial Communications and Baud Rate q Q8 8 Restore Default including Serial Communications and Baud Rate Take Single Sample E na Show Version Configuration Vi n a iba 15 uses current exposure 1 5 as Max Exposure 14 PERSONA M 115 nn 2 6 X 4 QGnn gt 1 2 2 8 3 13 4 20 5 26 13 74 14 80 80 Serial Communication Mode 9 1 RS232 2 RS422 3 RS422 Terminated med 2 AR700 User s Manual Rev 1 4 12 08 44 Acuity Laser Measurement 13 Command Index See the two quick reference chapters sections 11 and 12 for programming reference not operation All commands and their interactions are described in detail in the operation section appropriate for each command button Serial Communication Mode 23 An Nn Serial Output Control 24 Bn Baud Rate 23 Hn Sampling Control 34 I Initialize Configuration Data 38 J nnnnn Limit 31 K nnnnn Limit 2 31 Ln Background Light Elimination 8 10 32 M nn Exposure Limit 33 Pn Sample Priority 8 10 On Error R
40. e subjective location too close but not the distance a number AR700 User s Manual Rev 1 4 12 08 6 Acuity Laser Measurement 1 4 Quick Start Instructions This will get the sensor running in its default configuration Only one output type Serial Analog or Limit is needed to indicate sensor operation 1 4 1 Mounting Caution for Class 3B sensors be sure that the laser will not cause an eye hazard Use eyewear specifically designed to block laser light of the wavelength used by the sensor Use eyewear through which the green LASER ON LED is visible Quick suggestion Lay the sensor on the floor or a table It may need to be held in place with a clamp or a weight Orient the laser so that the laser and return paths are not obstructed Use a piece of paper such as a business card to insert into the beam to use as a measurement target Mount the sensor in such a way that the unit is not twisted or warped Using three hard points along the front and back edges or a slightly compliant mounting system are the best methods Do not clamp or squeeze the sensor excessively If the sensor is distorted its sensitivity and accuracy may be affected 1 4 2 Power Signals Connect the red Supply and black Supply Common wires of the sensor cable to a 15 to 24 volt DC power supply or use the power supply if the sensor came with one To be sure that the sensor is using default settings press the function button while tur
41. e Configuration Data I none Restore Default excluding Serial Communications and Baud Rate 10 Q8 Restore Default including Serial Communications and Baud Rate Take Single Sample E none Valid when Sample Mode is not On not H1 Shaw Version Configuration Vni 1234 z Send the current version and configuration Response is very long i 1235 z Send the Model version and serial number Short response Exposure Limit M none uses current exposure x 1 5 as Max Exposure 15 M80 Mnn 0 lt nmn lt 80 use MAX x 2 0 25 nn 80 as Max Exposure MAX Serial Communication Mode 9 ae AR700 User s Manual Rev 1 4 12 08 43 Acuity Laser Measurement 12 Function Button Command Quick Reference AR 700 Configuration Data Settings Function Buttons fe Serial ommand Name EL MM Default Command Function Button Parameter Function Button Setting X Special Function Codes Sample Interval sl 3 1 40 2 S100 3 S400 4 S1000 5 4000 6 S10000 7 S40000 8 T S100000 9 400000 10 S999999 5 us increments F 200000 S 5Hz Zero Point zli 1 Uses present location as Zero Point 2 2 0 3 10000 4 20000 5 30000 6 40000 7 50000 0 1 On continuous output laser is on Sampling Control H 6 i nd a ie od 4 Hardware Trigger Mode laser is off
42. e correctly with the beam blocked AR700 User s Manual Rev 1 4 12 08 11 Acuity Laser Measurement 2 3 Electrical Installation The AR700 sensor s electrical connections are all provided through an attached cable Included are power input output communications and shielding The sensor is ON whenever power is applied to the cable See Signal and Power Interface section 4 Note that class 3B operation requires interlocks and other safety features that can be satisfied with the Interlock Box option 2 4 Mechanical Optical Installation The AR700 sensor is typically installed by affixing the sensor to a machined bracket with bolts through the two mounting holes in the sensor Their location is shown in the mechanical drawing above _ REFLECTED LIGHT E T d OPTICAL BASE TARGET STANDOFF Laser light is emitted from the laser aperture which is close to the Laser Aperture placard as shown The laser beam then strikes the target at a position along its range Some of the laser light reflected from the target is collected by the camera lens The Optical Base defines the distance from the laser aperture to the camera lens The Optical Base and Optical Width define the area between the laser target and lens that must be kept clear throughout the full measurement range This way the camera can always see the laser spot on the target a requirement for the measurement process The Range is the sensor s full measuremen
43. e power on with the button held down The function display LEDs should cycle through a pattern that illuminates each one at a time When the button is released the sensor will reset to the default configuration 9600 baud 8 bits no parity 1 stop bit and should enable serial RS232 communication with the host system 3 5 2 Sensor Output Check If the sensor output value is in error check that the sensor and target are stationary and stable that the target is in the middle of the measurement range as an initial test distance and that the laser beam is hitting the target The Zero Point and Span Point configuration settings may alter the values output by the sensor Reset the sensor to the default to remove their effect The sensor may need to warm up for 5 10 minutes before reaching full accuracy Leave it on for a few minutes and re check the sensor accuracy AR700 User s Manual Rev 1 4 12 08 17 Acuity Laser Measurement 4 Signal and Power Interface The AR700 has a multipurpose cable sensor cable with solder tail wires If the AR700 is ordered with a power supply the sensor cable will be connected to the power supply Connection and termination according to the instructions is essential for correct sensor operation Read the wire descriptions for connection information 4 1 Sensor Cable Wire Colors and Functions The tables below shows the wiring on systems ordered without power supplies W
44. ement resolution How much does the target need to move before a reliable distance change appears in the measurement A target material that is smooth and opaque such as an enamel painted surface will measure more reliably than a rough or porous surface such as paper or anodized aluminum AR700 User s Manual Rev 1 4 12 08 35 Acuity Laser Measurement This function is dependent on the measurement quality and the sample period and is related to noise and sample quality In general the resolution will improve as the square root of the number of scan cycles averaged The number of cycles averaged is generally proportional to the sample period Rate priority mode can reduce the resolution if it reduces the signal quality in order to increase the rate Once the sensor is controlling the exposure time the target reflectance and distance affect the resolution Then the number of scan cycles averaged can increase proportionally to the target reflectance Note that target reflectance refers to the amount of laser light scattered in the direction of the sensor s lens A mirror can be highly reflective but it can reflect nearly all the light away from the lens and have a very low reflectance to the sensor A flat black surface can appear to have a much higher reflectance to the sensor than the mirror The number of scan cycles averaged will decrease as the square of the distance from the sensor s lens to the target That being said the sensor wi
45. en each sample 8 3 4 Hardware Trigger Mode Laser Off H4 In this mode sampling is off There is no output The laser is off The Laser Disable input is used to trigger a single sample measurement each time the signal changes from disabled to enabled The camera does not track the exposure This mode is useful for synchronizing single samples with a hardware input signal Single samples can also be requested by command in this mode Note that the Laser Disable input signal must remain enabled until the sample is acquired or the laser will turn off and disable the sensor s ability to sample 8 3 5 Measure Single Sample E This command is normally used when sampling is off It causes a single sample to be measured and outputs to be generated analog limit and serial This command is ignored if sampling is on This command does not change any configuration settings Note Sending the E command while a sample is in progress will cause a new sample to follow AR700 User s Manual A Rev 1 4 12 08 34 culty Laser Measurement 8 3 6 High Speed Sampling Tips High speed sampling can be hindered by several things The sensor gives no indication if the specified sample rate is not being met Targets that are dark and or distant require longer exposure times to obtain good samples making higher speeds more difficult to attain With BLE ON L1 the exposure time required is double that needed with BLE
46. eport Mode 25 R Read Configuration Data 37 Snnnnnn Sample Interval 8 32 Tn Serial Flow Control 24 U nnnnn Span Point 27 29 V1234 Show Version Configuration 38 W1234 Write Configuration Data 3T 42 Xn Analog Output Control 29 Z nnnnn Zero Point 27 29 AR700 User s Manual Rev 1 4 12 08 45 Acuity Laser Measurement
47. ero Point Z Spati Polit UJ ise tet tte ee ceat ep eese E d otro Temas ee pe dee deest caca 27 5 2 6 1 Unbiased Output Units A7 AS A9 N2 N3 ecccccccesccescceseceeceseccecsceeseesseesseeseeeeeeeseeeeeeseenaeeeaeenseens 27 5 2 6 2 Zero Based Output Units AO Al default A2 NO NI eese nennen nennen 28 5 2 6 3 Offset Based Output Units A4 AS A6 cesses eerte ener nenne tren rca rene nre 28 6 ANALOG OUTPUT OPERATION X eee ecce ee esee eene ense tuse tn seta setas ta sete sess assess esos etas e tas tas tasa sta 29 6 1 ANALOG OUTPUT OFF ias 29 6 2 CURRENT LOOP OUTPUT X1 DEFAULT X3 eperraren nnn r EErEE r E E K niar KEE KEK E iek 29 6 3 VOLTAGE OUTPUT AA EE RE ERATA 29 6 4 ZERO POINT Z SPAN POINT ii 29 6 4 1 Unbiased Analog Output X3 X4 eese eene enne anna nn nono nn trennen enne tren nennen trennt trenes 30 6 4 2 Zero Span Biased Output X1 X2 eese eene nennen teeth en trennen trennen eene nennen 30 7 LIMIT OUTPUT OPERATION J K sscsscosssessscscosssesssnssesssensisecssncscosscosscassenssusssnsssnscendevacssaesoasonsssiusosesed rara eia 31 7 1 LIMIT SWITCHES BOTH OFF BETWEEN LIMITS INCLUSIVE J lt K essen 31 7 2 LIMIT SWITCHES BOTH ON BETWEEN LIMITS INCLUSIVE J gt K esee 31 7 3 LIMIT OUTPUT TOGGLE J K FOR ANALOG OUTPUT TIMING esee enne enne enne enne 31 8 PERFORMANCE OPTIMIZATION ccscss
48. et Each model has a different standoff distance range and linearity specification For more detailed specifications see the data sheet The standoff distance represents the distance from the face of the sensor to the center of the measurement range The range Range is the distance from the start of the measurement range to the end of the range 2 1 Principles of Operation The AR700 uses triangulation to measure distance The laser beam is projected from the housing s aperture and shines on a target surface where it is focused to a small spot From there the laser light is scattered in all directions A collection lens is located in the sensor to the side of the laser aperture It focuses an image of the spot on a linear array camera which views the entire measurement range The position of the laser spot imaged in the camera is then processed to determine the distance to the target The sensor controls the exposure according to the amount light falling on it so longer exposure times allow greater sensitivity to targets with weak reflections The exposure time and laser power level are controlled to optimize the accuracy of the measurements for the signal strength and environmental light level measured Internal averaging is performed for all scan cycles that fit in the programmed sample interval Measurement time and laser power are adjusted for the next scan cycle based on the results from the previous scan cycle so rapidly changing condit
49. ge if a sample is not determined to be valid and within the sensor s measurement range 6 1 Analog Output Off X5 In this mode no analog output is generated on the analog output wires 6 2 Current Loop Output X1 default X3 In 4 20mA analog mode the analog output will deliver a current which increases linearly from 4 mA at the Zero Point to 20 mA at the Span Point Best accuracy and noise immunity is obtained by connecting a 500 Ohm resistor to the current return wire at the measurement point The default configuration is for calibrated output with the Zero Point at zero Z0 and the Span Point at full scale U50000 6 3 Voltage Output X2 X4 In 0 10V voltage mode the analog output will deliver a voltage which increases linearly from OV at the Zero Point to 10V at the Span Point Best accuracy and noise immunity is obtained by connecting a 10K Ohm resistor to the voltage return wire at the measurement point The default configuration is for calibrated output with the Zero Point at zero Z0 and the Span Point at full scale U50000 6 4 Zero Point Z Span Point U NOTE The Zero Point Z and Span Point U parameters may also affect the Serial Output The location of the Zero Point may be changed with the Zero Point command Z The direction of increasing output serial values from the Zero Point may be reversed by issuing the Span Point command U with a value smaller than that used in the Zero Point command
50. ge scaling Limit Output Operation limit switch settings Performance Optimization Sample Rate Background Elimination Exposure control AR700 Command Set explains all commands for customizing the application 1 1 General Overview The AR700 is a triangulation sensor that measures distance using a laser beam a camera and a microprocessor A variety of models are specified each to allow a different measurement range Models vary in range from 0 125 to 50 inches 3 175 to 1270 mm The accuracy is generally specified with a linearity of about 0 03 of the range A variety of configuration settings can be selected via the serial port or by using the function button and the function display LEDs The complete list of settings is found in the AR700 Command Set chapter and each setting is discussed in detail in a specific operation chapter The Sample Rate can be specified and the sensor has capability above 9400 samples per second Background Light Elimination Sample Priority and Exposure Limit controls enhance the performance Sampling may be turned on and off It can even be triggered using an input signal wire or a serial command Measurement output can be in the form of serial data RS232 or RS422 Analog Output 4 20mA current loop or 0 10V voltage and Limit Outputs two switches Serial data with optional flow control is available in five formats Metric English Native and two binary output modes Offsets scaling a
51. gle sample will be measured each time this signal transitions from low to high The measurement will begin within 70 us of the transition Note that the Laser Disable input signal must remain enabled signal state high until the sample is acquired or the laser will turn off and disable the sensor s ability to sample A mechanical switch is not recommended for triggering unless the switch has excellent bounce characteristics For the fastest possible trigger speed use an open collector transistor and use a trigger pulse that goes low 0 volt state for 70 us and remains high the rest of the time Use BLE OFF L2 Rate Priority P2 and limit the exposure 4500 samples per second can be achieved in this way if the target is close and highly reflective enough to operate with an exposure limit of M33 and a Sample interval of S21 See Performance Optimization section 8 for more about Sampling Control AR700 User s Manual A Rev 1 4 12 08 21 culty Laser Measurement 4 2 Other Interfaces Terminal block connections can be provided for user connections 4 2 1 Optional Interface Kit with Serial Cable and Power Supply The Acuity AR700 Interface Kit p n AQ7000001 provides an interface box with terminal block connections a serial cable for connecting to a PC and a Power Supply One terminal block in the interface box connects to the AR700 sensor A second terminal block allows user access to all other connections as neede
52. gt lt LF gt AR700 User s Manual A e Rev 1 4 12 08 25 cuity Laser Measurement 5 2 3 3 ASCII Metric A2 A6 A9 Error codes for Metric units mm are as follows AR700 0 500 model Q1 default Code mode Q2 mode Q3 natural mode 1 Target too near EI CR LF 12 7003 lt CR gt lt LF gt 12 7003 lt CR gt lt LF gt 2 Target not seen E2 lt CR gt lt LF gt 12 7005 lt CR gt lt LF gt 12 7005 lt CR gt lt LF gt 3 Target too far E3 lt CR gt lt LE gt 12 7008 lt CR gt lt LF gt 12 7008 lt CR gt lt LF gt 4 Laser Off E4 lt CR gt lt LF gt 12 7010 lt CR gt lt LF gt 12 7010 lt CR gt lt LF gt 5 2 3 4 English and Metric Output Formats Sensor Range English Metric Metric Range 0 125 in 0 xxxxxx in X xxxxx mm 3 17500 mm 0 250 in 0 xxxxxx in x xxxxx mm 6 35000 mm 0 500 in 0 xxxxx in XX XXXX mm 12 7000 mm 1 0 in X XXXXX in xx xxxx mm 25 4000 mm 2 0 in X XXXXX in xx xxxx mm 50 8000 mm 4 0 in X XXXXX in xxx xxx mm 101 600 mm 6 0 in X XXXXX in xxx xxx mm 152 400 mm 8 0 in X XXXXX in xxx xxx mm 203 200 mm 12 0 in XX XXXX in xxx xxx mm 304 800 mm 16 0 in XX XXXX in xxx xxx mm 406 400 mm 24 0 in XX XXXX in xxx xxx mm 609 600 mm 32 0 in XX XXXX in xxx xxx mm 812 800 mm 50 0 in XX XXX in xxxx xx mm 1270 00 mm 5 2 4 3 Byte Binary Data format NO N2 LH lt FF gt In this mode each sample data output consists of 3 bytes representing a value in Native
53. he M command without a parameter and it will set the Exposure Limit for about 1 5 times the exposure required at the measured location This value will be sufficient for most applications To see what value has been set use the Show Version command V1234 to display all of the current parameter settings Once the approximate M value is known a slightly different one can be used if adjustment is necessary 8 3 Sampling Control H E The sensor is able to sample the distance using measurement scans on a continual basis Whenever sampling is on the sensor continually updates the limit outputs If an analog output is enabled then it is updated with each sample If serial data is on then it is updated with each sample Sampling may be turned off as needed 8 3 1 Sampling On Laser On H1 In this mode sampling is on continuously The laser is on Enabled outputs are updated at the sample rate 8 3 2 Sampling Off Laser Off H2 In this mode sampling is off There is no output The laser is off The camera does not track the exposure This mode is used for measuring single samples but without the laser being on continuously 8 3 3 Sampling Off Laser On H3 In this mode sampling is off There is no output The laser is on so that the sensor s camera can keep the exposure up to date This mode is useful when single samples will be commanded but the target reflectivity or position may change significantly betwe
54. his 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 received including interference that may cause undesired operation Note This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this device in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense This manual copyright 2008 Schmitt Industries Inc AR700 User s Manual Rev 1 4 12 08 i Acuity Table of Contents Te ANTRODUCTION nan DER 5 1 1 GENERAL OD AVID AAN 5 1 2 OPERATING GUIDELINES SAFETY ISSUES ccccccccccsessssscecececeesesseeecececeesenseaececcceesesseaeceeeeeesesesaeeeeeeeesenseaeees 6 1 3 DEFINITION OF TERMS cscccccccccsessssscecececsesessececececeesessesecececeeseseaeceseceeseaeaeseeeceeseaeaeeeeceseseseaaeeeeeeeesenseaeees 6 1 4 QUICK START INSTRUCTIONS ccccsssecessecceceese
55. ible settings for the Sample Interval parameter but only fifteen possible setting values are available from the function button If a parameter has been displayed for ten seconds without a push of the function button then the function display will return to idle The LEDs will go off 10 3 4 Function Button Changing a Setting The function button can be used to change the setting of a displayed parameter While the parameter is being displayed the setting LEDs do not flash Push and hold the function button for at least one second The next available setting for that parameter will flash continuously on the setting LEDs Note that the parameter LEDs continue to display the parameter value and do not flash A value flashing on the setting LEDs indicates an available setting value not the current setting value Each momentary push of the function button less than one second will advance the setting LEDs to display the next available setting value again flashing After the last available setting is displayed a momentary push of the function button cycles the setting LEDs back to displaying the current setting not flashing When the desired selection is flashing push and hold the function button for at least one second The selection will become active and the settings LEDs will stop flashing and display the current setting for the parameter normally the one selected Some parameter settings are functions and not settings so the
56. ination on RX Two signal pairs TX and RX use four wires CTS 7 and RTS are not available 5 1 2 Baud Rate B The Baud Rate is selectable via the function button Although changing the Baud Rate using the serial port is also allowed it requires the host device to change its own Baud Rate after commanding the sensor to change The following Baud Rates are provided with corresponding serial command 300 B1 1200 B2 2400 B3 4800 B4 9600 B5 default 19200 B6 38400 B7 57600 B8 115200 B9 230400 BO AR700 User s Manual Rev 1 4 12 08 23 Acuity Laser Measurement 5 1 3 Serial Output Flow Control T The Serial Flow Control command is used to select the serial output flow control mode Whenever sampling is enabled the measurement analog output and limit output operations continue even though serial output flow may be stopped 5 1 3 1 Output Flow Control OFF T2 default In this mode waiting characters are always transmitted 5 1 3 2 Hardware Output Flow Control T1 This mode uses the RS232 control signal CTS In this mode the sensor will not transmit any characters if the CTS signal is not active It will immediately begin transmitting any waiting characters when CTS becomes active Hardware flow control is not operational in RS422 mode This mode responds on a character by character basis 5 1 3 3 Soft Output Flow Control T3 In this mode the sensor responds to software flow control chara
57. ions may result in momentary loss of signal or overexposure If the sensor cannot acquire a usable scan cycle within the sample interval then an error code no target will be generated As described in Quick Start section 1 4 there are several configuration settings that significantly affect the behavior of the sensor The first of these is Sample Interval Longer sample intervals allow more averaging of the scan cycles and lower noise levels Shorter sample intervals give the best results when the reflected signal is relatively strong The Sample Priority setting is also used to control the exposure With priority set to QUALITY the sensor is allowed to use a longer measurement time than would normally fit in the programmed sample interval if it is needed for a good exposure Under reduced reflection conditions this can causes the samples to be generated at a slower rate than expected With priority set to RATE the sensor limits the measurement time so that a sample can always be reported at the expected sample rate even if the measurement is too short to acquire a good signal resulting in an error code If high levels of ambient light are present the use of the Background Light Elimination mode may improve measurement quality With this mode ON a camera exposure is taken with the laser off and subtracted from a subsequent exposure with the laser on This will eliminate many ambient light effects unless the ambient light levels in the target
58. ire Function in All Modes Red Power Supply 15V 15 VDC min to 24 VDC max Black Ground Power Supply Common Return White Laser Disable connect to ground to disable Clear Shield Ground at Supply End Pink Limit 1 Output open collector NPN switch to ground Grey Limit 2 Output open collector NPN switch to ground The analog output wires can be used for 4 20 mA current output or 0 10V voltage output Function in Selected Analog Mode Wire 4 20mA 0 10V Orange Current Loop Output Voltage Output Brown Current Loop Return Voltage Return The serial communications wires can be used for RS232 or RS422 Function in Selected Serial Mode Wire RS232 RS422 Yellow RxD Receive Data RX Receive Data Green TxD Transmit Data TX Transmit Data Blue RTS Request To Send TX Transmit Data Violet CTS Clear To Send RX 4 Receive Data 4 1 1 Power Supply Black Red The Black wire is the Power Supply Common return also named Ground It carries the return current for the power supply the Limit Outputs the Laser Enable and the serial data signals Note that the ground current for the Limit Outputs may be up to 100 mA each The Red wire is the Power Supply Input to the sensor The sensor requires 15 VDC power at 120 mA to 200 mA depending on the internal laser used The sensor uses a surge of up to 350 mA at power on The Analog Output uses an additional cu
59. is optionally provided with the sensor 1 3 Definition of Terms Sensor The complete AR700 measurement device Target The object of measurement The relative distance from the sensor to the target is measured by the sensor Laser Laser beam This bright light is emitted from the sensor reflected from the target and collected by the camera lens Camera Detector An internal imaging device that views the laser spot on the target Range The maximum relative distance measurable by the sensor Range 1 Range 2 The region over which the target can be measured At the near end of the range the sensor measures zero At the far end of the range the sensor measures its maximum value its Range value Scan A single exposure of the camera Scan Cycle A complete camera operation sufficient to produce a result Two scans with BLE On one scan with BLE Off Sample A complete sensor measurement with calculated calibrated output Often it is the average of many scan cycles Above Too Far A target location further from the sensor than the end of the range but where the laser spot is still visible to the camera In this condition the sensor can report the subjective location too far but not the distance a number Below Too Close A target location closer to the sensor than the start of the range but where the laser spot is still visible to the camera In this condition the sensor can report th
60. l data is transmitted Analog and Limit Outputs continue to function 5 2 2 ASCII Native Format A0 A4 A7 Native is the format used for many commands Z J K U and it is also provided as an output format Native has valid measurement values between 0 and 50000 inclusive The output is AR700 User s Manual Rev 1 4 12 08 24 Acuity Laser Measurement up to five digits followed by lt CR gt lt LF gt Carriage Return and Line Feed characters that represent a measured distance computed as Distance lt Range gt value 50000 lt Range gt is the sensor s numeric Range Errors are represented by values over 50000 Error Native Units value 1 Target too near 50001 lt CR gt lt LF gt 2 Target not seen 50002 lt CR gt lt LF gt 3 Target too far 50003 lt CR gt lt LF gt 4 Laser Off 50004 lt CR gt lt LF gt 5 2 3 ASCII Distance In these modes each sample consists of a string of characters as follows optional minus sign see Offset Based Output section 5 2 6 3 up to 7 distance digits plus a decimal point depending on model range section 5 2 3 4 and followed by lt CR gt lt LF gt for a maximum of 10 characters including lt CR gt lt LF gt characters Leading zeros are not transmitted except a single zero prior to the decimal point The maximum number of characters is dependent on the sensor s lt Range gt and the measurement units selected Output formats are as follows 5 2 3 1 Er
61. nd a selection of 10 baud rates are provided After making changes to the configuration it may be viewed saved in non volatile memory and restored At power on the sensor uses the most recently saved configuration settings AR700 User s Manual A e Rev 1 4 12 08 5 cuity Laser Measurement 1 2 Operating Guidelines Safety issues Use protective eyewear whenever there is a risk of being exposed to the output beam of a class 3B AR700 Use eyewear specifically designed to block laser light of the wavelength used by the sensor Use eyewear through which the green LASER ON LED is visible Do not point the sensor at any person particularly a person s eyes or face Do not attempt to disassemble the sensor Improper disassembly will destroy the optical alignment of the sensor and necessitate factory repairs Do not operate the sensor in areas where the sensor is exposed to direct sunlight for extended periods or where the air temperature is more than 40 C 104 F or less than 0 C 32 F Avoid excessive vibration and shocks The sensor contains securely mounted but precisely aligned optical components Do not scratch the windows on the front face of the sensor Keep the front windows clean with a damp cotton cloth The windows are glass with an anti reflection coating Avoid the use of cleaning solvents other than alcohol Operate only with DC supply voltages between 15 and 24 volts A 15 volt standard AC to DC power supply
62. ning on the power then after the function display LEDs start cycling release the button 1 4 3 Serial Data Wires Quick suggestion Connect the wires to a 9 pin D SUB male connector that can be plugged into a COM port of a PC RS232 Black Ground to pin 5 Green Transmit to pin 2 and Yellow Receive to pin 3 If the sensor has an interface box its connector is already wired for this Start a HyperTerminal program on the PC and set it for that COM port at 9600 baud 8 bit 1 start 1 stop no flow control The sensor will report its present measurements five times per second in inches If a target surface is placed in the measurement range of the sensor the screen should display distance information The distance is measured from the start of the measurement range If there is no target in the measurement range the sensor will output an error code and the laser may flash ten times per second 1 4 4 Analog Output Signals Quick suggestion connect a DVM digital volt meter to the wires Brown to Common Orange to mA input The default mode is 4 20mA current loop The meter should read near 4 mA when a target is placed in the laser beam near the start of the measurement range and 20 mA near the end 1 4 5 Limit Signals Quick suggestion connect a 1K resistor in series with an LED cathode to the resistor anode to the Power Supply to each wire Pink and Grey The default action is Limit 1 will go active LED light
63. quest a Sample Interval shorter than the time it takes to transmit the serial data If one sample is being transmitted and another is waiting to be transmitted then any new sample will replace the waiting sample the previous waiting sample is lost For example it normally takes about 9 milliseconds to send an ASCII sample value at 9600 baud which limits the average serial data rate to about 110 samples per second AR700 User s Manual A e Rev 1 4 12 08 8 cuity Laser Measurement 1 5 Note that the Analog Output and Limit Outputs are updated for every sample even for those for which the serial data is lost due to insufficient serial data rates Serial flow control also doesn t stop the sensor from sampling See Serial Data Rate section 8 5 for more information Road Profile Operation Road Profiler Models Only Road Profile RP operation is provided in Road Profiler models AR7OORP Road Profile operation differs from standard operation in several ways The RP operating mode is designed to measure the distance to a surface that is moving quickly in a direction perpendicular to the laser beam Special algorithms are designed to measure as much of the surface as possible during the sample period This has the effect of averaging over small cracks or pits in the surface being measured A few specific differences in the RP operations are noted Road Profile operation can only be selected in RP models The operator selects
64. rofiler Modes section 1 5 In this mode the shutter time is limited in order to guarantee the programmed sample rate If the exposure is too low then the sample quality accuracy may be reduced If the shutter time is limited in this mode then there will only be only one scan cycle per sample no averaging 8 2 2 3 Exposure Limit M limited in Road Profiler Modes section 1 5 When the sensors camera doesn t see a laser spot on a target then it increases the exposure in order to try to see one If there is no target within range then the exposure can be increased to just over 0 1 second Once a target comes into range it may take the sensor a very long time up to 0 5 seconds to get the correct exposure Also under this condition it is easy for a background point of light to be interpreted as a laser spot The Exposure Limit command is provided in order to significantly reduce both of these effects It can be manually set from MO to M80 but it is not easy to understand the effect of the value of the parameter ExposureLimit MaxExposure 2 0 25 M 80 Note that MaxExposure is in units of time laser power However it is easy to have it acquire a value automatically Get the least reflective target material that is to be used in an application and position it at the far end of the range such AR700 User s Manual Rev 1 4 12 08 33 Acuity Laser Measurement that it is getting a good measurement Issue t
65. ror Modes QI default Q2 Q3 Three user selectable modes of error indication can be set for ASCII distance formats by the Error Report Mode command Q1 code E Error lt CR gt lt LF gt El lt CR gt lt LF gt Q2 plus ErrorValue lt CR gt lt LF gt 5 0001 lt CR gt lt LF gt Q3 natural ErrorValue lt CR gt lt LF gt 5 0001 lt CR gt lt LF gt Error values are indicated by out of range distances see Native Format section 5 2 2 The numeric error codes are coded as ErrorValue Range 50000 Error 50000 Any numeric output value inclusive of 0 0000 and Range is a valid distance measurement For a 1 sensor 1 00000 is a valid output and 1 00006 represents error 3 too far For the same sensor in metric 25 4000 is a valid output and 25 4015 represents error 3 Examples in the sub sections below represent the output from a 5 inch range sensor for clarity 5 2 3 2 ASCII English A1 default AS A8 Error codes for English units inches are as follows AR700 0 500 model Q1 default Q2 Q3 Error Code mode mode natural mode 1 Target too near EI CR LF 0 50001 lt CR gt lt LF gt 0 50001 lt CR gt lt LF gt 2 Target not seen E2 lt CR gt lt LF gt 40 50002 CR LF 0 50002 lt CR gt lt LF gt 3 Target too far E3 lt CR gt lt LF gt 0 50003 lt CR gt lt LF gt 0 50003 lt CR gt lt LF gt 4 Laser Off E4 lt CR gt lt LF gt 0 50004 lt CR gt lt LF gt 0 50004 lt CR
66. rrent up to 20 mA The maximum ripple allowed on the supply is 100 mVpp Power supplies from 15 VDC to 24 VDC may be used Higher voltages will result in excessive current drawn by the over voltage protection circuitry and may cause permanent damage Voltages less than 14 VDC may result in inaccurate measurement readings Class 3B laser operation requires interlocks and other safety features that can be satisfied with the Interlock Box option AR700 User s Manual A e Rev 1 4 12 08 18 cuity Laser Measurement 4 1 2 Shield Clear The Clear wire is the cable and housing shield and is connected to ground inside the sensor It should also be connected to ground at the power supply end of the cable 4 1 3 Serial Communications Green Yellow Blue Violet A standard 9 pin D SUB serial connector can be built to interface with an IBM or compatible computer using connection the pin out table below The RS422 pin out shown is not a standard This pin out is not compatible with the AR600 Pin e qose Signal Direction Wire Color Wu EC Com UMS 1 Data Carrier Detect DCD To Computer N C 2 Transmitted Data To Computer Green TXD TX TX 3 Received Data From Computer Yellow RXD RX RX 4 DTE Ready N C 5 GND Reference Black COM Reference 6 DCE Ready To Computer N C 7 Clear To Send Optional Violet CTS RX RX 8 Request To Send Optional To Computer Blue RTS TX TX 9 Ring De
67. s if a target is missing or placed in the laser beam slightly before the start of the measurement range Limit 2 will go active LED AR700 User s Manual A Rev 1 4 12 08 7 cuity Laser Measurement lights if a target is missing or placed in the laser beam slightly after the end of the measurement range 1 4 6 Laser Disable Wire Quick suggestion Leave the white wire disconnected to allow the laser to operate Connect the white wire to Ground black wire to disable the laser sensor won t operate 1 4 7 Important Configuration Considerations There are several configuration settings that significantly affect the sensor s measurement characteristics Using the configuration commands to customize these settings for each specific application will help optimize the sensors operation See Performance Optimization section 8 for more details on these and other settings 1 4 7 1 Sample Interval S Use the Sample Interval command to set the maximum average rate at which the sensor produces output The command s parameter has a range of 21 to 999999 in units of 5 us The Sample Rate is therefore 200000 divided by the parameter value The default setting is 40000 which sets the rate at 5 samples per second 200000 40000 5 Type S20000 lt Enter gt in HyperTerminal to change it to 10 samples per second 200000 20000 10 This command sets the maximum average rate The rate may need to be slowed down if the sensor s
68. scssssssscscscscssscescscscscscsssssssscssscsessseesssesscssocssessscssscssscsssessssesecens 32 AR700 User s Manual Rev 1 4 12 08 iii Acuity Laser Measurement 8 1 SAMPLE DEFINITION ccccccccccncnononononononononononononononononononononononononononononononononononononononononononononononononanonanananononono 32 8 2 SAMPLE yg A MR 32 8 2 1 Background Light Elimination BLE L eese eese eene nnne nennen nennen entren 32 6 2 1 1 BLE ON L1 default ieissa ionnan p ae ioe E Ee E IRRE 32 8 2 1 2 BLE OFF Ll do te ee 32 8 2 1 3 ROAD PROFILING L3 Default in Road Profiler Models section 1 5 sss 33 6 2 2 Sample Exposure and Priority P sese eene eerte net entente nenne 33 6 2 2 1 Quality sets Priority PI1 default eese eene nennen renes 33 6 2 2 2 Rate sets Priority P2 forced in Road Profiler Modes section 1 5 esee 33 6 2 2 3 Exposure Limit M limited in Road Profiler Modes section 1 5 sese 33 8 3 SAMPLING CONTROL H E cccesssccessssceceeseececsecceceeseeecsesaeeecseneeceeaeeeceeaaeeecseceececseeeceesaeeeesesaeeseseeeeeees 34 6 3 1 Sampling On Laser On H1 ccccccccccesccescesecesecssecsseesceesceeseeseceseecseceaecsaecaecaaecaeecaeesaeeeaeesaeeeneeeeseaeenaes 34 6 3 2 Sampling Off Laser Off H2 esses nennen rennen rene ne trennen nennen 34 6 3 3 Sampling Off Laser On H3
69. seaaaeseeeeeeseneeaeees 13 2 NADO ON 14 2 8 ENVIRONMENTAL MATERIALG ccsscsccccccecsessssececccecsessaecesececeesssaeeesecececseaaeaeseeececeesesaeeececeesensaaseeeeeeeeeeas 14 2 9 SENSOR SPECIFICATIONS ccccesssssccecececsesseaececcceceessauececececsesssaeceeececeesesaeaeceeeesessaeaeseeeceesesseaeeeeeeeeseneeaeees 14 3 INSTALLATION AND CHECKOUT ucicsssssssssessssscssossnacssoessenscosnessssncssbessssnassccssnsiascnessancsescessnsnsssbessassaiecesen 15 3 1 MOUNTING unit 15 3 2 CABLING hene tete uelit usate ici 15 3 2 1 Standalone Cabling iii nina dt nde Codes 15 332 2 Connection to a Host COMpPUter c ccccccesccescesscesecesecsecsseescesssesseeseeeneceeeeeseceaecesecaecaaecsaeeseeeseeeseeeaees 15 3 3 POWER ON aieeaa e E E EE A EE EE E a EEEN EOE EE 15 3 4 VERIFYING OPERATION sus aa 16 3 5 TROUBLESHOOTING Asiron espe adt sb 16 3 5 1 Serial Comm nications CHECK isisisi iaia i a e a e nex a A aa 17 3 5 2 Sensor Output Che iaa 17 AR700 User s Manual Acuity Laser Measurement User s Manual for the AR700 Series Laser Distance Gauge Rev 1 4 For use with AR700 Rev 0 10 Rev 1 4 12 08 ii Acuity Laser Measurement 4 SIGNAL AND POWER INTERFACE csssssssssssssssesssssssesscssssessessssessessssessessssessessssessassssessessssessessssessesees 18 4 1 SENSOR CABLE WIRE COLORS AND FUNCTIONS eeseeeeeeeeerenneenne ener nennen reet neon rene rennen 18 4 1 1 Power Supply Black Red s iae
70. t nennen eene rennen 23 34 1 3 RS422 Terminated function button parameter 9 setting 3 sese 23 5 1 2 BOARD nba beso ended mM rs LANI IM Ed 23 24 3 Serial Output Flow Control CL aer t ER e Shanes C SHEER ae ele deduces setae 24 5 1 3 1 Output Flow Control OFF T2 default eee 24 3 1 3 2 Hardware Output Flow Control T1 eese eese eene enne enne ene nene tnnt en nente 24 3 4 3 3 Soft Output Flow Control T3 se tege R REN Ne abuse cuam 24 5 1 4 Input Flow Control 24 5 2 SERIAL DATA QUTPUTTA Ns 24 32 1 Serial Output Off SP s P 24 5 2 2 ASCII Native Format AO Ad A7 ccccccccccccccssssssccccceesssssccecesecsesseaececececsessneaeeececsesesneaecececsesenseaeeeeeees 24 3 2 3 DRIN IITH X 25 5 2 3 1 Error Modes Ol default Q2 Q3 sessi entere enne enne 25 5 2 3 2 ASCII English Al default AS A8 cccccccccccccceccessceseceseceseeseeeaeeeseeeseeceneeneeceseceaeceaeeaaecseeeseenaeennees 25 5 2 3 3 ASCI Metric A2 A6 A9 sis ice inn ie FERREIRA TERCERO See PE NERO TERRY 26 5 2 3 4 English and Metric Output Formats eee esee eee tnnt tren trennen eene enne 26 5 2 4 3 Byte Binary Data format NO N2 esses ene cnn ona rene enne netrte trennen trennen 26 2 2 5 2 Byte Binary Data format N1 N3 sese enne enne nan cnn anar cnn cane enne en rennen ene 26 5 2 6 Z
71. t range This is the range over which the sensor s output distance measurement is calibrated The Target Standoff is the approximate distance from the sensor face to the midpoint of the measurement range This is a non calibrated distance that is used primarily for sensor selection and installation design AR700 User s Manual Rev 1 4 12 08 12 Acuity Laser Measurement 2 5 Laser Safety Caution This laser device should not be aimed at the human eye Installers of laser sensors should follow precautions set forth by ANSI Z136 1 Standard for the Safe Use of Lasers or by their local safety oversight organization Be sure that the laser will not cause an eye hazard For Class 3B models Class 3B operation requires interlocks and other safety features that are not supplied with the AR700 sensor It is the responsibility of the installer to ensure that the complete system meets all applicable safety standards for Class 3B laser products This may include but not be limited to a beam attenuator compliant power supply interlocks external interlock switches emission indicators and user warning labels that may be required to be visible during use The AR700 Interlock Box option can be used to satisfy these requirements Use eyewear specifically designed to block laser light of the wavelength emitted by the sensor and through which the green LASER ON LED is visible Several lasers are used in the AR700 sensor models
72. tect To Computer N C RS232 and RS422 modes are compatible with the associated ANSI standards See Serial Interface Operation section 5 for more information 4 1 4 Analog Output Brown Orange The Brown wire is the return signal for the Analog Output It is connected to ground inside the sensor and should not be connected to ground outside the sensor Inadvertently connecting it to ground may cause a reduction in accuracy of the analog output especially in voltage mode AR700 User s Manual A e Rev 1 4 12 08 19 cuity Laser Measurement 4 1 4 1 4 20 mA Current Loop Output Orange In Current Loop mode the Orange wire delivers a current proportional to the measured distance ORANGE DC VOLTS FROM AR700 SENSOR CURRENT MEASUREMENT DEVICE BROWN COMMON The best conversion to voltage is obtained by connecting a 500 ohm load resistor 1 4 Watt minimum between the orange and brown wires at the measurement point This gives a 2 volt to 10 volt output range See Analog Output Operation section 6 for mode selection and scaling options ORANGE WW DC VOLTS 1 10K s FROM AR7 SENSOR zs 2 VOLTAGE MEASUREMENT DEVICE BROWN I COMMON The sensor may be connected directly to a meter or a filter may be inserted to reduce noise The filter shown will pass the signal at full speed nearly 10000 samples per second To filter better at slower speeds use a 0 01 uF capacitor 1000 samples per se
73. th default settings should have a resolution of 1 part in 20000 for a diffuse white target normal to the laser at the middle of the sensor s range 8 5 Serial Data Rate Serial data is transmitted from the AR700 at a variety of formats and baud rates The time it takes to transmit a measurement is highly dependent on the format and baud rate The amount of time can be computed as TransmitTime in seconds 10 Number of characters Baud Rate If a typical sensor sends 9 characters per sample at a default baud rate of 9600 this equates to about 94 ms per sample or about 107 samples per second 1 TransmitTime The AR700 sensor is capable of generating samples at more than 800 times that rate over 9400 samples per second At a baud rate of 230400 the nine character samples can be transmitted at only 2560 samples per second Even using 3 byte binary mode only gets the rate up to 7680 samples per second Only by using 2 byte binary mode at 230400 baud can the sensor transmit the serial data at the full measurement rate of the sensor If the serial data rate is faster than the sample rate then a single sample is transmitted serially for each sample measured When the serial data rate can t keep up with the sample rate the actual sample rate continues without delay but the serial sample rate is reduced by skipping samples Once a sample has finished being transmitted the most recent new sample is used for the next serial output
74. the RP operating mode via the BLE command L3 selects RP mode and is the default BLE mode in the RP model L1 BLE ON and L2 BLE OFF commands will select normal AR700 operating modes in the RP models In the RP operating mode the BLE mode is turned OFF This is because the laser is always turned on allowing the camera to expose as much of the surface as possible In the RP operating mode the Priority is changed to RATE Attempts to change the priority will be ignored while in the RP mode L3 Generally a more powerful laser is used for the RP model in order to get a high rate of exposures needed to characterize a surface at highway speeds The V1234 command will report AR700RP instead of AR700 allowing the user to verify the Road Profiler firmware installation The Exposure Limit will have no effect for values greater than M52 In the RP operating mode the maximum trigger speed is about 3500 Hz with M39 used to help achieve this rate Measurement exposures require a tighter tolerance than standard sensors Each out of tolerance measurement will report an error rather than a computed value AR700 User s Manual Rev 1 4 12 08 9 Acuity Laser Measurement 2 General Description The AR700 is a laser diode based distance measurement sensor for ranges from 0 125 to 50 inches 3 175 to 1270 mm The accuracy is generally specified with a linearity of 0 03 of the range There are many different models as specified in the data she
75. tive SP 51500 Since the sensor can never measure past 50000 the analog output would never go above 40 of full scale 50000 is 40 of the way from 49000 to 51500 Setting the Span Point to a value lower than the Zero Point will reverse the direction of increasing output Measurement Z 20000 U 50000 below no change Z 40000 U 20000 no change 10 0 010 V 4 000 mA 10 000 V 20 000 mA 20000 0 010 V 4 000 mA 10 000 V 20 000 mA 20010 0 013 V 4 005 mA 9 995 V 19 992 mA 30010 3 343 V 9 339 mA 5 000 V 11 992 mA 49990 9 997 V 19 995 mA 0 010 V 4 000 mA above no change no change AR700 User s Manual Rev 1 4 12 08 30 Acuity Laser Measurement 7 Limit Output Operation J K The limit outputs use two wires not used in the basic configuration Limit 1 Pink Associated with Parameter J and the Limit 1 command Limit 2 Grey Associated with Parameter K and the Limit 2 command The limit outputs are updated with each sample measured The limit outputs can keep up with the sensor s fastest measurement rate Example J25000 Set Limit 1 to middle of range 0 to 50000 J Set Limit 1 to current location K12500 Set Limit 2 at 1 4 of range The limit outputs are set based on the sensor reading in Native units Note that valid measurements include values that the sensor detects out of range and an invalid measurement is one for which the sensor cannot determine position 7 1 Limit Switches both OFF
76. tt Industries incorporated LICENSE a You are granted a personal nontransferable and non exclusive license to use the hardware and software in this Agreement Title and ownership of the hardware and software and documentation remain in Schmitt Industries Incorporated the hardware and software may be used by you only on a single installation c you and your employees and agents are required to protect the confidentiality of the hardware and software You may not distribute disclose or otherwise make the hardware and software or documentation available to any third party you may not copy or reproduce the hardware and software or documentation for any purpose e your may not assign or transfer the hardware and software or this license to any other person without the express prior written consent of Schmitt Industries Incorporated f you acknowledge that you are receiving only a LIMITED LICENSE TO USE the hardware and software and related documentation and that Schmitt Industries Incorporated retains title to the hardware and software and documentation You acknowledge that Schmitt Industries Incorporated has a valuable proprietary interest in the hardware and software and documentation YOU MAY NOT USE COPY MODIFY OR TRANSFER THE HARDWARE AND SOFTWARE IN WHOLE OR IN ANY PART WITHOUT THE PRIOR WRITTEN CONSENT OF SCHMITT INDUSTRIES INCORPORATED IF YOU TRANSFER POSSESSION OF ANY PORTION OF THE HARDWARE OR SOFTWARE TO ANOTHER PARTY YOUR LICE
77. ty Laser Measurement S50 Terminating character slash after only 2 of 6 digits entered s000050 Executed automatically after 6th digit entered S50A2 The A command Serial Output Control terminates the S command 10 2 3 Serial Command Execution Each command is executed when it is recognized as complete There is no specific termination character Commands are completed in the following ways e When the maximum number of parameter digits is received Note that for some commands the maximum number of digits is zero and the command letter itself is the complete command e When a non numeric character is received This may be a new command letter or some other character such as a period slash space or Carriage Return CR It is advisable to terminate a command if uncertain as to whether is has been terminated Use a character such as period slash space or CR to ensure immediate command execution Extra characters of this type have no ill effects When a command is executed it is first evaluated If the parameter is valid the command execution is completed A command with an invalid command is ignored Commands are executed in the order received A command s execution is completed before the next command is evaluated 10 2 4 Serial Command Response There is no acknowledgement character from the sensor when a command is received evaluated or executed If the command is a valid it will be exec
78. uted If the command is not valid it is ignored All commands interrupt the sampling process momentarily when they are executed In some cases this is negligible Commands that change non volatile memory may take up to 100 ms to complete Commands that alter the sampling mode cause a restart of sampling Multiple commands may be grouped together in a single transmission However sending more than 10 characters in a single transmission at high baud rates may result in loss of characters In RS232 mode the sensor always uses the RTS signal to indicate when there is a danger of losing characters Enable hardware flow control on the sending system to avoid the loss of characters The sensor does not send software flow control characters Note that a special response is returned for the V command 10 3 Function Button Command Operation The function button is used in conjunction with the function display LEDs in order to display or change many of the configuration settings or parameter settings 10 3 1 Function Display LEDs There is only one button on the sensor the function button Below the function P RO button are the function display LEDs They are organized as two sets of four 7 4 LEDs The LEDs marked P represent the function Parameter and the LEDs SKS marked S represent the parameter Setting 7 4 AR700 User s Manual Rev 1 4 12 08 40 Acuity Laser Measurement 10 3 2 Function Display LED codes Each set of LEDs has
79. vessovssteestendecsessvates teusiensoseustenavsniocsseessveseeec vassequsdencoes 42 11 SERIAL COMMAND QUICK REFERENCE ooooococconcononnnonocnncnncnnocnonaconcnnocononnonncononnonncn nono ronoconcononncononaos 43 12 FUNCTION BUTTON COMMAND QUICK REFERENCE cccsscscssssssssensscsssscssssssescsssnersesneeseses 44 13 COMMAND INDEX AAA 45 AR700 User s Manual Rev 1 4 12 08 iv Acuity Laser Measurement 1 Introduction This section is a guide to getting started with the AR700 and this manual The AR700 has a number of configurable parameters but many applications can use the sensor in its default configuration The recommended order for reading the manual is e General Overview Gives a brief understanding of the sensor operation e Operating Guidelines Provides a few important safety tips e Definition of Terms An aid for proper communication e Quick Start Instructions This should provide the information necessary to connect the sensor and verify its operation either with a serial terminal program at 9600 baud or by connecting the current loop or Limit Output interface e General Description Gives important laser operation mechanical and mounting information e Installation and Checkout Tailor the application Use the other chapters for reference Signal and Power Interface how to hook everything up Serial Interface Operation modes formats bias Analog Output Operation current loop volta
80. will cause the transistor to turn off in the case of a current overload The transistor will remain off until the sensor s measurement conditions cause it to turn off and then back on again The load for each output should be connected to the Power Supply Red wire The voltage on these wires must not exceed the limits of the Power Supply connection voltages red and black wires or excessive current may flow into the sensor and cause damage RED 15 VOLTS DC PINK LIMIT 1 RELAY LOAD FROM AR7 SENSOR POWER SUPPLY GREY LIMIT 2 RELAY LOAD BLACK COMMON 4 1 6 Laser Disable and Trigger White The White wire is the Laser Disable input Connecting it to Ground black wire will disable the laser turn it off It is normally left unconnected to enable the laser If this input will be controlled by an operator from more than two meters from the sensor then an emission indicator near the operator control area may be necessary to comply with laser safety regulations This signal can be driven by a switch an open collector transistor or by TTL or 3 to 5 volt CMOS level signals This signal must be held in one state for at least 70 us in order to guarantee that the state is recognized A low signal 0 volt state disables the laser A high state 3 to 5 volts enables the laser Additionally this input can be used to trigger a single measurements in the sensor If the Sampling Control is set to HARDWARE TRIGGER mode then a sin
81. wire connections Only the power and ground need be connected for operation in addition to the serial interface For testing use a terminal emulation program such as the Windows HyperTerminal set to 9600 baud 8 bits no parity 1 stop bit to communicate with a sensor in the default configuration 3 3 Power On Caution be sure that the laser will not cause an eye hazard Use eyewear specifically designed to block laser light of the wavelength used by the sensor Use eyewear through which the green LASER ON LED is visible AR700 User s Manual Rev 1 4 12 08 15 Acuity Laser Measurement When power is applied some function display LEDs may flash briefly and go off Then the LASER ON LED will come on and stay on Then the laser beam will be emitted from the front laser aperture window In most models the laser beam will be bright red but some have invisible or nearly invisible laser light The sensor will begin transmitting measurement readings as soon as the laser comes on 3 4 Verifying Operation In its default configuration the AR700 transmits 5 samples per second at 9600 baud over the serial signals and transmits measured distance over the current loop output at the same update rate The current loop should put out 4 mA at the near end of the measurement range and 20 mA at the far end Check either or both signals to verify basic sensor operation 3 5 The sensor can display simple error indications using its function

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