Treadmill user manual
Contents
1. anaa ORE TEEDE 15 Coordinate system for load measurements right half Of 15 Coordinate system for the left half of the treadmill 16 Force ANd Couple CQUGTON sive sci scscsesaugs conch sdeca ted siasdacoacensa coves csasbedcbesaipacousendacsidacsesdudanedud se EEA 16 6500 Digital Signal Converter CONNECTIONS scccesccceesscsssscessecsnsessnceceeecsseeseseeesseescecssasecsaecesaeeseecssaecsaeeseseeseaeessaaeseaseesaseeenaees 19 AMO5XX SCFICS COMNECEIONS cigs ccexsticasticssanseswsoneteunadeecessaVicessedecsasnsodravangceessa itessavcedosuieetsdshadad 19 Gain switch settings for the AM6504 sccsscscesecesecenceseneeeeaeeesaeeesaeceseeceseecssseseaeeessaeeesaeeseaeeseeessaeseaeeceseeesatecsseeseaeeseauecenaeessaeeeaeees 20 68 0 A a Sedaan aE a iaeaea Eia ia Sea a aiie ioiai 20 Pin configuration for the standard analog 15 pin 21 Instrumented Treadmill Page v of 23 Bertec Corporation 6171 Huntley Road SuiteJ Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL User WELEI DOMINATE YOUR FIELD INTRODUCTION Bertec s instrumented dual belt treadmi2. Page 14 of 23 Instrumented Treadmill User Manual Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL BERTEC User Manual DOMINATE YOUR FIELD CALCULATING LOAD VALUES Each force plate is calibrated individually and the calibration matrix is stored digitally in the force plate Therefore the analog output from the amplifier provides full scale calibrated output 5 V per rated load range of the attached force plate The voltage output of each channel is a scaled form of the load in the units of N and Nem for the forces and moments respectively The scale factor for each channel for a gain of unity is given in the product data sheet supplied with the transducer The force and moment values are calculated by multiplying the signal values with corresponding scale factors as given in the following equation F C S F C S F C S 8 S Force and signal scale factors where F s and M s are the force and moment components in the force transducer coordinate system Figure 6 and S s are the output signals corresponding to the channels indicated by their subscripts in volts divided by the respective channel gain The origin of the coordinate system is centered at the inner corner of the outer back roller support block of the corresponding right or left treadmill half Figure 6 and Figure 7 T
3. h F M a La M y E x Force and Couple equation Where Xp and are the coordinates of the point of application for the force i e center of pressure on the treadmill belt his the height difference of the belt surface from the x y plane of the coordinate system see the Coordinate system figures and T is the couple acting on the force plate The height h can be taken as 15 mm 0 58 Page 16 of 23 Instrumented Treadmill User Manual Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL BERTEC User Manual DOMINATE YOUR FIELD LOAD COMPUTATION EXAMPLE Consider a case where the external amplifier gain is set to 10 note that the gain value is always the same for all of the six channels If at an instant in time the amplifier voltage outputs for the six channels are CHANNEL OUTPUT V 1 450 2 235 4 765 3 095 0 575 1 016 Then by dividing each output by the corresponding gain the output signal values to be used in the Force and signal scale factors equation are obtained 51 1 450 10 0 145 V 5 2 235 10 0 2235 V S3 4 765 10 0 4765 V S4 3 095 10 0 3095 V 55 0 575 10 0 0575 V 56 1 016 10 0 1016 V Let us use hypothetical scale factors in N V and Nem V C 1000 N V C 1000 N V C3 1500 N V
4. Cy 300 Nem V Cs 300 Nem V Cs 250 Nem V Then from the Force and signal scale factors equation F 1000 0 145 145 0 N F 1000 0 2235 223 5 N F 1500 0 4765 714 8 N 300 0 3095 92 9 Nem Note that if the results are needed in English Units an alternative to converting them at the end of calculations is to convert the scale factors to English Units by converting the first three factors from N V to lb V and the last three factors from Nem V to ftelb V This can be done by multiplying the first three scale factors by 0 2248 Ib N and last three scale factors by 0 7376 ftelb Nem Instrumented Treadmill User Manual Page 17 of 23 Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL User Manual DOMINATE YOUR FIELD M 300 0 0575 17 3 Nem M 250 0 1016 25 4 Nem To calculate the point of application of the force the Force and Couple equation is used With h 0 015 m the coordinates of the Center of Pressure on the belt will be _ 0 015 145 0 17 3 x 0 027m p 714 8 015 223 5 92 9 _ 714 8 Page 18 of 23 Instrumented Treadmill User Manual Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL BERTEC User WE
5. USER MANUAL BERTEC DOMINATE YOUR FIELD INSTRUMENTED TREADMILL Version 1 0 1 November 2011 INSTRUMENTED TREADMILL User Manual DOMINATE YOUR FIELD Copyright 2009 2011 BERTEC Corporation All rights reserved Information in this document is subject to change without notice Companies names and data used in examples herein are fictitious unless otherwise noted No part of this document may be reproduced or transmitted in any form or by any means electronic or mechanical for any purpose without express written permission of BERTEC Corporation or its licensees Measurement Excellence Dominate Your Field BERTEC Corporation and their logos are trademarks of BERTEC Corporation Other trademarks are the property of their respective owners Printed in the United States of America Bertec s authorized representative in the European Community regarding CE MIE Medical Research Ltd 6 Wortley Moor Road Leeds LS124 JF United Kingdom Phone 44 113 279 3710 Fax 44 113 231 0820 Page ii of 23 Instrumented Treadmill User Manual Bertec Corporation 6171 Huntley Road SuiteJ Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL BERTEC User WELEI DOMINATE YOUR FIELD LICENSE AGREEMENT AND LIMITED WARRANTY This License Agreement is between you Customer and Bertec Corporation and governs your use of the hardware software
6. m Incline Control opoe Aem Jog down to home the incline Set re Settings 50 2 4 Zero Exit Control panel window for treadmill acceleration velocity and incline control Page 10 of 23 Instrumented Treadmill User Manual Bertec Corporation 6171 Huntley Road SuiteJ Columbus OH 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL BERTEC User WELEI DOMINATE YOUR FIELD SETTINGS The Settings window Settings Window below is composed of three sections Treadmill Operation Granularity of Controls and Remote Control This window is available by clicking on the Settings button on the bottom right of the Control Panel The Treadmill Operation section allows the user to set maximum forward and backward velocities For example the Backward Speed Limit may be set to 0 m s if you do not want the treadmill to run backward The Inclination Limit is factory preset at 15 and can be lowered as necessary The Stop Deceleration field allows the user to set the deceleration rate of used by the treadmill when the Stop button is clicked on the Control Panel For more information on stopping the treadmill see the Stopping section By checking the box labeled Immediate Operation of Controls the treadmill is enabled to immediately respond to any changes in velocity acceleration or inclination made while using the Control Panel If the box is not checked then changes
7. The Stop button slows the treadmill to a stop using the deceleration preset in the Stop Deceleration field of the Settings window These two stop buttons always take immediate effect regardless of the status of the Immediate Operation of Controls box in the Settings window Page 12 of 23 Instrumented Treadmill User Manual Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL BERTEC User WELEI DOMINATE YOUR FIELD DATA ACQUISITION AND LOAD CALCULATIONS All Bertec products use a novel 16 bit digital technology for signal acquisition and conditioning The output signal of the load transducers are already digitized and conditioned in the treadmill force plates by using state of the art electronics developed by Bertec Corporation With this new technology the output signal has a very high signal to noise ratio which means increased sensitivity and accuracy for the force plates In addition the digital technology makes the use of calibration matrices obsolete since each plate comes with the calibration matrix already digitally stored on it Depending on the configuration the system provides the user with a digital analog or dual digital analog output The digital output of the system is always in the form of calibrated data in their respective units selected by the user N and Nem or Ib and Ibein The analog output requires an
8. additional scaling depending on the external amplification used in data acquisition ANALOG DATA ACQUISITION The output of the treadmill force plate is in the form of a 16 bit digital signal External digital to analog D A converters are used in order to obtain an analog output to be used in conventional data acquisition systems The D A converters are also analog amplifiers with either a unity 6501 series or adjustable gain 6504 and 6800 series setting for a detailed description of amplifiers please refer to Amplifiers and Signal Converters The pin configuration for the 15 pin analog output is given the General Specifications section Before starting to collect data make sure that the cables from the treadmill to the control electronics from the control electronics to the amplifiers and from the amplifiers to the computer are properly connected The force D plates reach thermal stability in about 5 minutes Therefore always allow the equipment to warm up at least for 5 minutes before collecting data AUTO ZERO All analog amplifiers are equipped with an Auto Zero button This button allows zeroing offset loads up to full scale This functionality can be used to remove tare weight placed onto the treadmill as part of the measurement protocol When the amplifier is first turned on of the two green lights next to the auto zero button only the bottom one will be on confirming that the amplifier is powered This indicates t
9. cables be routed to prevent tripping Alternatively use masking tape or some other non permanent means to hold the cables to the floor ON OFF EMERGENCY ANALOG CONTROLSIGNAL SWITCH STOP BUTTON OUTPUTS INPUT REMOTE EMERGENCY STOP Front panel of the power unit in the treadmill control box The power unit shown in the above figure houses the on off switch emergency stop button connectors for analog outputs and connectors for control signal inputs to the treadmill The amplifiers for the analog load outputs are connected to the connectors labeled A LEFT and B RIGHT The AM6500 amplifier controlling the treadmill is connected to the connector labeled AM6500 The red emergency stop button on the power unit can be used to bring the belts to a complete stop in case of an emergency An additional emergency stop cable connected to the connector labeled Remote E Stop is attached to the handrails of the treadmill so the test subject can also stop the treadmill if necessary Page 8 of 23 Instrumented Treadmill User Manual Bertec Corporation 6171 Huntley Road SuiteJ Columbus OH 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL BERTEC User Manual DOMINATE YOUR FIELD CONNECTOR FOR TREADMILL UN Front panel of the control unit Each half of the treadmill and the incline option if available is controlled by a separate control unit The three cables motor power motor control
10. ASSEMBLY TESTING REPAIR REPLACEMENT OPERATION MAINTENANCE OR USE OF ANY BERTEC PRODUCT OR ACCESSORY OR FROM THE PERFORMANCE OF ANY SERVICE SHALL NOT IN ANY EVENT EXCEED THE PRICE ALLOCABLE TO THE PRODUCT OR SERVICE WHICH GIVES RISE TO THE CLAIM LOSS OR DAMAGE PROVIDED FURTHER THAT THE END USER ASSUMES ALL RISK ASSOCIATED WITH THE USE OR MISUSE OF THE BERTEC PRODUCT ACCESSORY OR SERVICE IN CONTRAVENTION OF ANY DIRECTIONS OR WARNINGS PROVIDED IN BERTEC INSTRUCTIONAL LITERATURE OR GIVEN VERBALLY BY AN AUTHORIZED BERTEC REPRESENTATIVE OR THAT SHOULD BE REASONABLE BY COMMERCIALLY ACCEPTABLE STANDARDS THE PARTIES BERTEC BERTEC S AFFILIATES AND THE CUSTOMER OR END USER EXPRESSLY AGREE THAT THE LIMITATIONS ON INCIDENTAL CONSEQUENTIAL SPECIAL OR INDIRECT DAMAGES SET FORTH HEREIN ARE AGREED ALLOCATIONS OF RISK CONSTITUTING IN PART THE CONSIDERATION FOR THE SALE OF ANY BERTEC PRODUCT ACCESSORY OR SERVICE AND THAT SUCH LIMITATIONS SHALL SURVIVE THE DETERMINATION OF ANY COURT OF COMPETENT JURISDICTION THAT ANY REMEDY PROVIDED HEREIN OR AVAILABLE AT LAW FAILS OF ITS ESSENTIAL PURPOSE BECAUSE SOME STATES AND JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY THE ABOVE LIMITATION MAY NOT APPLY TO YOU 6 Product Maintenance During the Warranty Period Bertec shall provide to you any new corrected or enhanced version of the Product as created by Bertec Such enhancement shall include all modifications to the Product which increase the spee
11. Control Stopping Data Acquisition and Load Calculations Analog Data Acquisition Auto Zero Calculating Load Values Calculation of the Point of Application of Force and Couple Load Computation Example Amplifiers and Signal Converters 6500 Digital Signal Converter AM6501 AM6504 Analog Amplifier AM6800 Dual Output Adjustable Gain Amplifier General Specifications Customer Support Document Revision History BERTEC DOMINATE YOUR FIELD on N Q 10 10 11 12 12 13 13 13 15 16 17 19 19 19 20 21 22 23 Page iv of 23 Bertec Corporation 6171 Huntley Road SuiteJ Columbus OH 43229 U S A Instrumented Treadmill User Manual t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL BERTEC User Manual DOMINATE YOUR FIELD LIST OF FIGURES Front panel of the power unit the treadmill control 8 Front panel Of the Unit othsacoasealsavaldeduvenstdyaeeoublned odes studies 9 Control panel window for treadmill acceleration velocity and incline 10 THE Settings 11 The Incline Gontrol and Drive Status SCHON cede 12 Force ONE SIGNAL 5 fACEONS
12. IFIER The AM65XX series external analog amplifiers are utilized to convert the digital output of the treadmill force plates to an analog signal using a fixed or variable gain value The number of gain values is indicated by the suffix XX in the model identifier i e 6501 unity gain 6504 gain of four etc These amplifiers also provide an auto zero button to remove tare load offset When they are used with treadmills no external power source is needed The input and output connections to the AM65XX modules are shown in the figure below The pin assignments for the analog output channels are shown in the General Specification section The output voltage range for all channels is 5V Shorting pins 9 and 10 on the 15 pin output connector has the same effect as pushing the autozero button ANALOG OUTPUT AUTOZERO Volts 12V DC AC Made in U S A Amperes 0 50A AM65XX series connections The lower light is on when the unit is powered A blinking LED indicates that the unit is not connected to a treadmill force plate If the LED is blinking check all the cable connections to the treadmill Instrumented Treadmill User Manual Page 19 of 23 Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL BERTEC User Manual DOMINATE YOUR FIELD The AM6504 has two additional dipswitches on the top surface to set the gain for the output si
13. LEI DOMINATE YOUR FIELD AMPLIFIERS AND SIGNAL CONVERTERS Signal conditioning and amplification for the treadmill force plates are provided by means of external amplifiers Each force plate has an internal digital preamplifier which digitizes the analog signal from the transducer strain gauges and conditions it through oversampling preliminary amplification and filtering The calibration matrix of the force plate is digitally stored on the preamplifier so that the output is already calibrated data having the units of Newtons and Newton meters The output of the force plate is a 16 bit digital signal using RS 485 format AM6500 DIGITAL SIGNAL CONVERTER The AM6500 series external converter is used to control the motion of the treadmill belts It can also be used to collect data through the USB port of the computer The input output connections for the AM6500 module are shown in the figure below The output is a standard B type USB connector Next to the connector are two LED lights The lower light is on when the unit is powered and the upper light comes on if the unit is connected to the USB port of the computer The input to the module is via a 9 pin D Sub connector located at the back of the unit located next to the power input When they are used with treadmills no external power source is needed USB OUTPUT a Volts 12V DC AC Made in U S A Amperes 0 50A AM6500 Digital Signal Converter connections AM6501 AM6504 ANALOG AMPL
14. and load transducer signal from the treadmill are connected to the connecter shown as show above When the control box is powered the white power light on each control unit comes on A lit green motor light shows that the motors are powered by the control unit while the software is running The red fault light shows that control unit has shut down due to overload or some other error condition The control software will display the appropriate error message Instrumented Treadmill User Manual Page 9 of 23 6171 Huntley Road Suite J Columbus OH 43229 U S A t 1 614 430 5421 f 16144 www bertec com INSTRUMENTED TREADMILL BERTEC User Manual DOMINATE YOUR FIELD CONTROL SOFTWARE The treadmill is entirely controlled using only two windows Control Panel window below and Settings Window next page The Control Panel is broken into two main sections Belt Control and Incline Control Incline Control is not displayed if the incline feature is not available Also available on the bottom of the Control Panel are the two stop buttons and the Settings button BELT CONTROL The Control Panel Control Panel window below allows the user to direct the belt speed and acceleration The top left and right fields indicate if the treadmill is properly connected and ready to operate by displaying Enabled If the fields do not display Enabled then check the cable connections between the computer and the amplifiers the amplifiers an
15. ate the incline feature the user must manually calibrate or home the zero position of the incline To home the incline click and hold down the down arrow in the Incline Control section until the treadmill is completely down the treadmill will make an audible thump noise when it is down Once it is completely down the treadmill will automatically take this as its zero position The degree indicator labeled in red and the horizontal degree slider bar now become active and the Incline field will display Homed see Incline Control and Drive Status below The incline feature is now completely active and the degree selector labeled in green or slider bar may be used to change the slope of the treadmill The degree indicator displays feedback from the treadmill indicating the actual degree of incline If you wish to limit the maximum incline angle refer to the Settings section Incline Control epo Or rome The Incline Control and Drive Status section This is only available with a completely activated treadmill with the incline feature STOPPING In addition to the two manual emergency stop buttons the control software provides two stop buttons These are the buttons to be used during normal operating conditions The 4 Zero button slows the treadmill to stop using the current acceleration specified by the user in the acceleration field of the Belt Control section of the Control Panel
16. d efficiency or ease of use of the Product or add additional capabilities or functionality to the Product but shall not include any substantially new or rewritten version of the Product These updates will require Internet Access to our web site to automatically validate your License Key and provide update support After expiration of the Warranty Period you may continue to receive maintenance support The charge for such optional maintenance support shall be Bertec s regular list price for maintenance and support for the Product as published from time to time by Bertec You will need to notify Bertec in writing if you desire to receive optional maintenance If you fail to take optional maintenance and later elect to receive it Bertec reserves the right to charge you their standard maintenance fees for the period of the lapse in maintenance Bertec may elect to discontinue maintenance at any time upon notice to you and refund of any then unearned maintenance fees 7 Proprietary Rights Exclusion Bertec makes no representation or warranty that the Product or products developed using the Product do not infringe any proprietary rights of any third parties You shall assume sole responsibility for any such infringement 8 Indemnification You hereby agree to indemnify defend and hold Bertec harmless from and against any and all claims actions suits liabilities judgments losses damages attorneys fees and other expenses of every nature and character b
17. d the electronics and the electronics and the treadmill The middle display fields V Vp Torque Drive Temp and Motor Temp provide feedback from the treadmill The user does not have access to these fields as they are for reference and diagnostic purposes only These velocity fields labeled in red display the actual speed s the belts are moving as reported back by the treadmill The left and right sides of the treadmill can be controlled independently or jointly The vertical slider bars allow for coarse control of the belt velocity The individual velocity fields labeled in green allow for independent fine control Below the independent velocity fields are the joint velocity and acceleration fields These fields are used for fine control when running the treads together For a description of the alternative control method see the section on Settings Changes to belt velocity and acceleration independently or jointly run can either take effect immediately or be delayed depending on the option checked in the Settings window For more information about this feature refer to the Settings section Belt Control Left Both Right Enabled z Enabled Vi m s 5 VR m s u UU Torque 1 z rer Drive Temp 0 0 Drive Temp 0 0 Motor Temp 0 0 Motor Temp 0 0 IE 0 00 m s 9 _ 0 00 m s 0 00m s 24 ime
18. echnology allows a simpler installation procedure in a minimum amount of time The analog signal output can be fed into an A D board so that data can be collected using conventional techniques Depending on the application signal amplification can be performed for analog output using external amplifiers External amplifiers are either fixed or adjustable gain four and seven adjustable gain models available These amplifiers enable the user to establish a trade off between the measurement range and the resolution of the treadmills Bertec s dual belt treadmills can easily be incorporated with the commercially available motion analysis systems to be used ina fully equipped locomotion laboratory Optional accessories for the treadmill are available as add on features These accessories include an incline feature which can be used to tilt the treadmill up to 15 instrumented handrails to measure test subjects grip forces safety harness attachment and caster attachments to relocate the treadmill Page 6 of 23 Instrumented Treadmill User Manual Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL BERTEC User Manual DOMINATE YOUR FIELD TREADMILL BASICS Locomotion analysis can provide significant information regarding the kinetics and kinematics of human motion The necessity for proper foot placement decreases the efficiency of loco
19. example results and documentation all of which are referred to herein as the Software or Hardware interchangeably THIS IS A LEGAL AGREEMENT BETWEEN YOU EITHER AN INDIVIDUAL OR AN ENTITY THE END USER AND BERTEC CORPORATION IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT PLEASE CONTACT BERTEC CORPORATION 1 Limited Warranty Except with respect to any BERTEC Corporation BERTEC products sold by or manufactured by any entity other than BERTEC its authorized distributors or suppliers which are provided as is without warranty of any kind warrants that a the BERTEC hardware product is free of all defects in workmanship and material for a period of 1 year from receipt by the end user or date of installation if such installation is performed by a representative of BERTEC b the media that BERTEC software is delivered upon are free from defects in workmanship and material and will perform substantially in accordance with the accompanying written materials for a period of one 1 year and c BERTEC support engineers will make commercially reasonable efforts to solve any problem issues as they arise Some states and jurisdictions do not allow limitations on duration of an implied warranty so the above limitation may not apply to you To the extent allowed by applicable law implied warranties on both the BERTEC hardware product and the BERTEC software product are limited to one 1 year 2 Title The product is co
20. gnal Each switch has an ON OFF setting The gains corresponding to each setting are given below 1 2 ON z 1 2 ON orr 18 GAIN 2 1 2 orr GAIN 5 1 2 ON a GAIN 10 Gain switch settings for the AM6504 AM6800 DUAL OUTPUT ADJUSTABLE GAIN AMPLIFIER The AM6800 amplifier shown below incorporates both analog and digital outputs into one unit The gain of the analog output is user selectable and has 7 different settings 1 2 5 10 20 50 100 A single gain selection switch is provided for all 6 output channels A three digit LED display on the front panel shows the current gain setting The channel signal indicators show the polarity of the analog output for the six force plate channels The auto zero button is utilized to remove tare load offset from each channel output The mains power input is a universal input with the range 100 240 V 50 60 Hz The digital output is a USB signal If the unit is not connected to a treadmill force plate the digital display will read PLA After the force plate is properly connected to the unit when the amplifier is turned on the display will briefly about 0 5 sec show the message CAL which indicates that the amplifier has successfully recognized the force plate Finally the gain setting will display on the digital readout The pin assignments for the analog output cha
21. hat zero has not been set yet Simply press and release the auto zero button in order to zero the bridges on the amplifier When zero is set both lights next to the auto zero button will be on For the 6800 series amplifiers the auto zero button is next to the power switch on the front panel For the 65XX series amplifiers it is located next to the 15 pin output connector Note that auto zeroing sets all channels to near zero True zeroing should be done by software at the time of data collection by subtracting a baseline reading from the collected data The analog data acquisition procedure can be summarized as follows e Check all the cables and make sure that they are properly connected e the amplifiers and allow the system to warm up at least for 5 minutes Instrumented Treadmill User Manual Page 13 of 23 Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL User Manual DOMINATE YOUR FIELD e For the 6504 and 6800 series amplifiers set a proper gain value for the data channels using the gain switch e Press the auto zero button to remove any load offset from the signals e Using the control software set the speeds for the right and left sides of the treadmill e Collect analog data using software Remember to remove a baseline reading from the signals in order to set the signal mean values to true zero
22. he standard coordinate system is such that the positive y direction points forward x axis is to the left when looking in the y axis direction and the z axis is defined downwards by the right hand rule Coordinate system for load measurements right half of treadmill The center of the coordinate system is at the inner corner of the arm block with y axis forward x axis to the left pointing inwards looking from behind and z axis downward Instrumented Treadmill User Manual Page 15 of 23 Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL User Manual DOMINATE YOUR FIELD Coordinate system for the left half of the treadmill The y axis is forward the x axis is to the left outwards looking from behind and the z axis is downward CALCULATION OF THE POINT OF APPLICATION OF FORCE AND COUPLE A load system acting on a treadmill belt can be completely described by the six load components i e the three force and three moment components calculated from the Force and signal scale factors equation Alternatively the same information can be given as the three force components the point of application of the force vector Xp Yp and a couple sometimes also referred as torque or free moment acting on the force plate The point of application of the force and the couple are calculated from the force and moment components as
23. ity and acceleration fields and moves through those fields The user can then use the Up and Down Arrow keys and the Page Up and Page Down keys on the keyboard to adjust speeds and acceleration without using the mouse or manually entering numbers The Page Up and Page Down keys allow for coarse control set in increments of tenths of m s for velocity The Up and Down Arrow keys allow for fine control set in hundredths of m s for velocity The amount of change that each key hit corresponds to is controlled by the Granularity of Controls The final feature of the Settings window is under the Remote Control section This section is used for remote control of the treadmill via a network For further details please contact Bertec directly Instrumented Treadmill User Manual Page 11 of 23 6171 Huntley Road SuiteJ Columbus OH 43229 U S A t 1 614 430 5421 f 16144 www bertec com INSTRUMENTED TREADMILL User Manual DOMINATE YOUR FIELD INCLINE CONTROL The incline feature is an available option treadmills do not come standard with this feature For those treadmills without the incline feature then this section will not be displayed in the Control Panel When the control software is first started the incline feature is not fully activated This is indicated by the text Jog Only displayed in the Incline field of the Incline Control portion of the Control Panel see the Control Panel window figure In order to fully activ
24. le for and shall not pay any amount of incidental consequential or other indirect damages whether based on lost revenue or otherwise regardless of whether Bertec was advised of the possibility of such losses in advance In no event shall Bertec s liability hereunder exceed the amount of license fees paid by you regardless of whether your claim is based on contract tort strict liability product liability or otherwise TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW IN NO EVENT SHALL BERTEC INCLUDING ANY OF BERTEC S SUBSIDIARIES OR PARENT COMPANIES SUPPLIERS DISTRIBUTORS RETAILERS OR MANUFACTURERS BE LIABLE FOR ANY SPECIAL INCIDENTAL INDIRECT OR CONSEQUENTIAL DAMAGES WHATSOEVER INCLUDING WITHOUT LIMITATION DAMAGES FOR LOST BUSINESS PROFIT BUSINESS INTERRUPTION LOSS OF BUSINESS INFORMATION OR ANY OTHER PECUNIARY LOSS ARISING OUT OF THE USE OF OR INABILITY TO USE THE BERTEC PRODUCT OR THE PROVISION OR FAILURE TO PROVIDE SUPPORT SERVICES EVEN IF BERTEC OR ITS AFFILIATES HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES THE TOTAL LIABILITY OF BERTEC AND OR ITS AFFILIATES FOR ANY LOSS DAMAGE CLAIM WHETHER IN CONTRACT TORT INCLUDING ACTIVE OR PASSIVE NEGLIGENCE OR STRICT LIABILITY OR OTHERWISE ARISING OUT OF CONNECTED WITH OR RESULTING FROM THE PERFORMANCE OR BREACH OF ANY PURCHASE ORDER OR CONTRACT OF SALE ACCEPTED OR EXECUTED BY BERTEC AND OR ITS AFFILIATES OR FROM THE DESIGN MANUFACTURE SALE DELIVERY RESALE INSPECTION
25. lls have been specifically designed for dynamic analysis of human locomotion Through the use of strain gauge technology innovative design and quality manufacturing Bertec s instrumented treadmills are well suited for locomotion applications in limited laboratory spaces Each treadmill consists of a number of strain gauged load transducers and a built in digital pre amplifier for signal conditioning Each half of Bertec s dual belt treadmill incorporates an independent force plate measuring six load components the three orthogonal components of the resultant force and the three components of the resultant moment in the same orthogonal coordinate system The point of application of the force and the couple acting can be readily calculated from the measured force and moment components independently for each half of the treadmill Bertec treadmills use a state of the art 16 bit digital technology for signal acquisition and conditioning This technology makes the use of calibration matrices obsolete since each half comes with the calibration matrix already digitally stored on it External amplifiers available for use with the treadmills provide the user with three signal output alternatives digital analog or dual digital analog outputs The digital signal output can be directly plugged into the standard USB port of a personal computer without the requirement of an additional PC card for analog to digital A D signal conversion This plug and play t
26. motion analysis using conventional stationary force plates Use of a dual belt instrumented treadmill eliminates the need for targeting the force plate to record valid ground reaction data and avoids the cumbersome process of multiple trials In addition to increased efficiency the controllable belt speed allows testing a wide range of subjects ranging from the elderly population to sprinting athletes Optional attachments such as the incline feature instrumented handrails and harness support structure allow tests to be performed under a variety of conditions TREADMILL DESIGN Bertec s dual belt treadmill consists of two treads running side by side Each tread has a 6 component force plate underneath to measure loads exerted on the tread belts Each tread is driven and controlled separately The tread belt and force plate structure is constructed such that the forces generated by the tread belt and the tension from the driving timing belt are internal forces and do not affect the load measurement Both halves of the treadmill sit on a rigid steel structure or a split mounting plate depending on the requested model The handrails are attached to this structure or directly to the mounting plates The tread belts are adjusted and balanced in the factory Do not change the adjustments without consulting Bertec Corporation first Technical specifications of the treadmill are supplied a separate data sheet This data sheet provides desig
27. n parameters such as maximum load capacity analog load scaling constants and maximum belt speeds Please review this data sheet before running the treadmill The standard width of the tread belt is 12 Upon customer specification it can be manufactured in the range 12 16 Bertec treadmills are calibrated and pre assembled in the factory Installation should be done by authorized Bertec personnel only Do not attempt to disassemble the treadmill damage can occur to the transducer components or electronics The Limited Warranty is void if the treadmill or any of the accessories are disassembled without the authorization of D Bertec To obtain a high quality measurement from Bertec treadmills they should be installed in a way that is suitable for the type of measurement to be performed First of all the floor and structure underneath should be prepared to be as rigid as possible in order to minimize any vibrations Bertec instrumented treadmills are very sensitive devices Therefore they will pick up any vibration coming from the support structure A second consideration is the flatness of the mounting surface Uneven surfaces might cause the supporting structure to deform causing inaccurate measurements Proper leveling and shimming should be done during installation Instrumented Treadmill User Manual Page 7 of 23 Bertec Corporation 6171 Huntley Road SuiteJ Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 ww
28. nnels are shown in the General Specification section A 19 rack mounting adaptor for AM6800 is available upon request from Bertec Corporation py CHANNELS AUTOZERO pienas ANALOG OUTPUT 123456 ait Ver ol Frequency S0 60H2 Fuses 2 0 508 SB BERTEC AMPLIFIER MODEL AM6800 made inu S A AM6800 amplifier On the front panel of the AM6800 amplifier the two lights between the auto zero button and power switch the bottom one comes on when the unit is switched on and the top light is lit after the auto zero button is pressed The input and output to the unit is through 9 pin and 15 pin female D Sub connectors respectively Page 20 of 23 Instrumented Treadmill User Manual Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL BERTEC User Manual DOMINATE YOUR FIELD GENERAL SPECIFICATIONS The 65 series AM6800 amplifiers provide 5 V full scale calibrated analog output per rated load range for each of the six force plate channels For example if the force plate has a 10 kN load range for the Fz channel then for a gain of unity the 5 00 V output corresponds to 10 kN and 5 00 V stands for 10 i e a sensitivity of 0 5 mV N The analog gain used in data acquisition represents a trade off between maximum load range and force plate sensitivity If the same force plate above is used wi
29. pyrighted by Bertec Bertec retains all rights title and ownership of the Product and all subsequent full or partial copies and derivatives of the Product made by you or Bertec including translations compilations partial copies modifications updates and know how in connection there with regardless of the form or media in or on which the same may exist This license is not a sale of the Product or any copy or derivative You shall have no right to reproduce any full or partial copies of the Product You agree not to take any steps such as reverse assembly or reverse compilation to derive a source code equivalent of any software contained in the product You also agree to destroy licensed data in all forms upon termination of said license or receipt of released program code 3 Confidentiality You agree that the product and other information technical data or know how including documentation related to the Product including the existence of the product and the results of use or testing shall be considered Confidential Information of Bertec You agree to protect the confidentiality of all Confidential Information of Bertec and not to disclose the Confidential Information to any other party without the written permission of Bertec Unauthorized use or disclosure of the Product may cause irreparable harm to Bertec You agree promptly to report any unauthorized use or disclosure to Bertec 4 Warranty of Functionality Bertec hereby represents and
30. th an amplifier gain of 5 then the load range will be limited to 2 kN This means the plate now has an increased sensitivity of 2 5 mV N The analog load scale factors for specific force plates given on the product data sheet supplied with the force plate are specified for a gain of one The analog output signals are filtered so that they have a standard bandwidth of 500 Hz The actual analog gain ratios are applied to the digital signal with an accuracy of 99 997 The auto zero button removes the signal offset and sets the analog output signal within 5 mV This feature can be used to increase the useful measurement range of the force plate by shifting the signal baseline Note that auto zero might not set the mean value of the signal to true zero Therefore an additional offset removal through software is suggested The digital input to all external amplifiers and signal converters is a female 9 pin D Sub connector whereas the analog output is in the form of a female 15 pin D Sub connector with the pin assignments shown below Shorting pins 9 and 10 has the same effect as pushing the autozero button on the AM6501 and AM6800 The output range for each channel is 5V CH1 Pin CH2 Pin 4 CH3 Pin 5 CH4 Pin 6 CH5 Pin 7 CH6 Pin 8 GRND Pin 10 Autozero Pin 9 Pin configuration for the standard analog 15 pin connector Instrumented Treadmill User Manual Page 21 of 23 Bertec Corporation 6171 Huntley Road SuiteJ Col
31. to velocity acceleration and inclination may be made on the Control Panel but they will not go into effect until the Set button at the bottom of the Control Panel is clicked The Set button only becomes active if this box is checked This allows the user to program multiple changes in the treadmill conditions and have them all go into effect at once r Treadmill Operation Forward Speed Limit 6 5 mis Backward Speed Limit Inclination Limit STOP Deceleration Immediate Operation of Controls Granularity of Controls Up Down PgUp PgDn Speed Adjustment Step 0 1 mis Acceleration Adjustment Step Jos z I Remote TCP IP Control Listen Port 4000 4 R Listen on 127 0 0 1 Only The Settings window This allows setting the treadmill s functional limits as well as the increment change for velocity and acceleration used in the Control Panel The Granularity of Controls section allows the user to adjust the increments by which the velocity and acceleration on the Control Panel move The Speed Adjustment has two adjustments fine left pull down and coarse right pull down in m s The Acceleration Adjustment only has one adjustment in m s These adjustments are useful in that the treadmill control software has an alternative control feature While on the Control Panel hitting the Tab key on the keyboard highlights the veloc
32. ts distributors entire liability and the customer s exclusive remedy shall be at BERTEC s option to either repair or replace all BERTEC hardware and or software products that do not meet BERTEC s Limited Warranty and are returned to BERTEC Cost of delivery of the BERTEC product to and from BERTEC will be the responsibility of BERTEC for the first year of the warranty period Thereafter all costs associated with transport of the BERTEC product shall be the responsibility of the customer This Limited Warranty is void if failure of the BERTEC hardware and or software products has resulted from improper installation by the customer in contravention of proper installation instructions as detailed in the user s manual included with the BERTEC product unauthorized modifications misuse or abuse of the BERTEC product by the customer and or failure by the customer to properly maintain the BERTEC product Any replacement BERTEC product will be warranted for the remainder of the original warranty period Should you have any questions concerning this Agreement please write to Bertec Corporation 6171 Huntley Road Suite J Columbus Ohio 43229 Instrumented Treadmill User Manual Page iii of 23 Bertec Corporat ley Road Suite Columbus 43229 U S A www bertec com INSTRUMENTED TREADMILL User Manual TABLE OF CONTENTS Introduction Treadmill Basics Treadmill Design Control Electronics Control Software Belt Control Settings Incline
33. umbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL User Manual BERTEC DOMINATE YOUR FIELD CUSTOMER SUPPORT For any questions or inquiries regarding Bertec products you can contact Bertec Corporation 6171 Huntley Road Suite J Columbus OH 43229 U S A Phone 1 614 430 5421 Fax 1 614 430 5425 E mail sales bertec com or service bertec com Web site www bertec com Suggestions or comments about Bertec products are always welcomed Page 22 of 23 Instrumented Treadmill User Manual Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com INSTRUMENTED TREADMILL User Manual BERTEC DOCUMENT REVISION HISTORY Date Revision Description Author 09 14 2009 1 00 Initial Revision Todd Wilson 08 04 2010 1 01 Treadmill diagram updated Todd Wilson 04 15 2011 1 02 Equation updated Todd Wilson 10 03 2011 1 03 Treadmill diagram updated Todd Wilson Instrumented Treadmill User Manual Page 23 of 23 Bertec Corporation 6171 Huntley Road Suite J Columbus 43229 U S A t 1 614 430 5421 f 1 614 430 5425 www bertec com
34. w bertec com INSTRUMENTED TREADMILL BERTEC User Manual DOMINATE YOUR FIELD The treadmill can be installed on to the floor or into a pit so that the belt surfaces are flush with the floor The height of the treadmill depends on whether it is fixed or inclining CONTROL ELECTRONICS The control electronics are housed in a separate 19 rack with modular units Each rack consists of a single power unit Power unit front panel below and two or three with the incline feature control units Control Unit front panel next page Each half of the treadmill and the incline is controlled by a single control unit Due to control signal and power restrictions the maximum distance from the treadmill motors to the electronics rack is about 3 m Three cables run from the electronics rack to the amplifiers They then continue on to the computer running the control and data acquisition software These cables can be up to 30 m long The control of the treadmill is carried out using an AM6500 USB amplifier Load output from the treadmill can be either digital or analog see Amplifiers and Signal Converters for available data acquisition units depending on customer specification The electrical network used to supply power to the data acquisition systems and treadmill electronics rack should be properly grounded Poor grounding is a common source of signal noise in electronic systems D Cables can be a hazard for tripping It is recommended that all
35. warrants that Bertec is the owner of the Product or otherwise has the right to grant to you and your employees the rights set forth in this Agreement THE PRODUCT IS PROVIDED AS IS THERE ARE NO WARRANTIES UNDER THIS AGREEMENT AND BERTEC DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE In the event of any breach or alleged breach of this warranty you shall promptly notify Bertec and return the Product to Bertec at your expense Your sole remedy shall be that Bertec shall correct the Product so that it operates according to the warranty This warranty shall not apply to the Product if modified by anyone or if used improperly or with on in an operating environment not approved by Bertec TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW BERTEC AND ITS DISTRIBUTORS DISCLAIM ALL OTHER WARRANTIES AND CONDITIONS EITHER EXPRESS OR IMPLIED INCLUDING NOT LIMITED IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR PARTICULAR PURPOSE TITLE AND NON INFRINGEMENT WITH REGARD TO THE BERTEC PRODUCT OR THE PROVISION OR FAILURE TO PROVIDE SUPPORT SERVICES THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS YOU MAY HAVE OTHER LEGAL RIGHTS NOT MENTIONED IN THIS WARRANTY THESE RIGHTS MAY VARY IN EACH STATE OR JURISDICTION 5 Limitation of Liability IN NO EVENT SHALL BERTEC BE LIABLE FOR ANY LOSS OF PROFITS LOSS OF USE SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES PURSUANT TO THIS AGREEMENT Bertec shall not be responsib
36. y reason of this Agreement or use by you of products utilizing the Product 9 Export Restrictions You shall not export directly or indirectly any Product or products developed using the Product to any country for which the laws of the United States or the regulations of any U S agency requires an export license or other governmental approval without first obtaining such license or approval You shall strictly comply with all such restrictions You agree to indemnify and hold Bertec harmless against all losses damages penalties or causes of action resulting from a violation of this Section 10 Governing Law The validity performance construction and interpretation of this Agreement shall be governed by laws of the state of Ohio United States of America excluding its conflicts of laws rules as applied to agreements entered into in Ohio between Ohio residents 11 High risk activities The software and or hardware supplied by Bertec Corporation is not fault tolerant and is not designed manufactured or intended for use or resale as on line control or equipment in hazardous environments requiring fail safe performance in which the failure of software and or hardware could lead directly to death personal injury or severe physical or environmental damage high risk activity Bertec Corporation and its suppliers specifically disclaim any express or implied warranties of fitness for high risk activities 12 Customer s remedies BERTEC s and i
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