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HCV Roller Brake Tester Specification

1. T st il R dacmhainneachta um Fheithicl Tr cht la C ercial Vehicle Roadworth s Testing a Heavy Commercial Vehicle Roller Brake Tester RBT Section 1 1 1 General overview The roller brake tester must be capable of carrying out brake tests on all Heavy Commercial Vehicles HCV s It must connect to a PC running software capable of outputting test data to CoVIS via the agreed protocols as set out in Section 9 of this specification The Roller Brake Tester RBT shall Consist of a pair of roller sets mounted at floor level Have the capability of accepting an axle load of 15 000kg Have the capacity to drive the rollers and record a minimum peak value of 4 000kgf Have the capacity of recording Service Brake Performance and Parking Brake performance separately e Be capable of distinguishing the different EU vehicle categories types f Have the capacity to operate and produce a printout of test reports independent of CoVIS for printout criteria see Appendix 3 g Be free of any disturbance from radio frequencies and electromagnetic fields h Operate reliably in all conditions likely to be encountered within the vehicle testing environment The equipment recessed in the floor shall meet a weather proof rating of IP42 or higher i Have the display and a user interface positioned on the driver s side right side in the driving direction and ensure the vehicle tester for all axles being tested has an unobstr
2. d Capable of stopping the RBT e Capable of being operated from the vehicle driving seat by remote control f Suitable secondary operating controls shall be available on the console or equivalent g Capable of selecting which axle number is on the RBT if a fixed test procedure is not applied If the remote control unit is not hard wired h The wireless remote control shall operate consistently and reliably at any stage of the test procedure Where direct line of sight technology is used the remote control receiver shall be located within one meter of the furthest display and shall directly face the operator at each testing position Should the distance between the receiver and the transmitter remote control exceed the useable range an additional receiver must be installed that is located at a closer range and mounted to the same standard i The unit shall be resistant to spurious signals from other sources On installation of the RBT or its accessories if it is found to be creating an interference with existing test equipment where no issue was found prior to the introduction of the new equipment the onus is on the new equipment supplier to provide an alternative means of communication channel frequency change etc that avoids such interference K A system shall be in place to ensure that each unit is dedicated to operate only one RBT when two or more are used in close proximity I Safe and convenient
3. Max Parking brake force Left KGF if applicable Max Parking brake force Right KGF if applicable Ovality of Disk drum Left 96 Ovality of Disk drum Right 96 Road friction left KGF Road friction Right KGF Wheel lock out occurrence left LOCKOUT Wheel lock out occurrence right LOCKOUT Pedal force applied KGF Air Pressure P1 brake actuator Bar Air Pressure P2 max guaranteed Bar o Air Pressure P3 Yellow Line Min Bar e Test limit applied and presentation of results for each axle e Outcome of the test Pass Fail Void Aborted e Provision for CVR tester s signature and Tester Number issued by the RSA 0 0 Q cQ O Q O Q O Oo O O9 P1 Is the air pressure that corresponds to the measured brake force taken at the test point nearest the brake chamber no load sensing or pressure reduction valve shall be between the two points P2 Is the maximum air pressure which the vehicle manufacturer guarantees will always be available It may be defined differently but is always the pressure to which the brake forces are extrapolated P3 Service Line Taken at the trailer coupling test point Page 12 of 22 Appendix 4 CITA 9B Quality Requirements Covering Calibration 6 3 Calibration 6 3 1 The inspection body shall ensure that there are proper arrangements to adequately control and calibrate vehicle inspection equipment before and during use in order to ensure its accuracy its conformity to the rel
4. VALUE gt lt MEAS gt lt MEAS OBJECT TRACK gt lt TITLE gt track lt TITLE gt lt VALUE RESULT 1 UNIT m km HIGHLIM1 14 0 gt 0 0 lt VALUE gt lt MEAS gt lt STEP gt lt STEP OBJECT PARKING_BRAKE gt lt TITLE gt Handbremse lt TITLE gt lt MEAS OBJECT BRAKEFORCE LOC LEFT gt lt TITLE gt max brakeforce Le lt TITLE gt lt VALUE RESULT 1 UNIT kgf TYPE MAX gt 230 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKEFORCE LOC RIGHT gt lt TITLE gt max brakeforce Ri lt TITLE gt VALUE RESULT 1 UNIT kgf TYPE MAX gt 224 lt VALUE gt lt MEAS gt MEAS OBJECT ROAD_ FRICTION LOC LEFT gt lt TITLE gt wheel drag Le lt TITLE gt VALUE RESULT 1 UNIT kgf gt 16 lt VALUE gt lt MEAS gt MEAS OBJECT ROAD_FRICTION LOC RIGHT gt lt TITLE gt wheel drag Ri lt TITLE gt VALUE RESULT 1 UNIT kgf gt 11 lt VALUE gt lt MEAS gt lt MEAS OBJECT MIN_PRESSURE gt lt TITLE gt contact pressure lt TITLE gt VALUE RESULT 1 UNIT Bar gt lt VALUE gt lt MEAS gt MEAS OBJECT PRESSURE_PM gt lt TITLE gt max PM lt TITLE gt VALUE RESULT 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt lt MEAS gt lt MEAS OBJECT PRESSURE_PZ gt TITLE max PZ lt TITLE gt VALUE RESULT 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt lt MEAS gt lt MEAS OBJECT PEDALFORCE gt lt TITLE gt max pedal force lt TITLE gt lt VALUE RESULT 1 UNIT kgf TYPE MAX HIGHL
5. following values i Low range 0 100 200 400 and 600 800kgf ii High range 0 1200 1500 2000 2500 and 4000kgf b If the brake force measurement is displayed on a VDU the accuracy of the brake force measurement shall be judged against the digital values c Traditional dials shall indicate the same values if applicable NOTE if the calibration device is certified in Kilo Newton KN the calibration on the VDU must also be in KN for the duration of the calibration and or verification procedure In this case the dials shall not be used as part of the calibration procedure Page 6 of 22 11 3 Calibration equipment and mechanical check a All component parts of the calibration device including any weights shall be individually marked with an identity number Each calibration device produced shall require its own certificate b If the certificate or any other relevant document produced for the calibration device is not in English the applicant shall make available a translation into English c When the static calibration has been completed with the RBT in calibration mode and with NO vehicle in the rollers the rollers shall be rotated and the brake force displayed should not exceed 25 kgf If this increase in friction is over 25kgf the following items should be further examined i Drive train mechanism ii Failing roller bearing iii Bent roller or drive shaft iv Roller chain d The RBT brake force reading
6. gt ULT 1 UNIT kgf TYPE MAX gt 0 lt VALUE gt MEAS OBJECT BRAKEFORCE LOC RIGHT gt lt TITLE gt max lt VALUE RES lt MEAS gt lt MEAS OBJECT lt TITLE gt whe lt VALUE RES lt MEAS gt lt MEAS OBJECT lt TITLE gt whe lt VALUE RES EAS gt lt lt MEAS OBJECT LE gt contact pressure lt TITLE gt lt TIT lt VALUE RES lt MEAS gt MEAS OBJECT T lt VALUE RES EAS gt lt MEAS OBJECT lt TITLE gt max lt VALUE RES lt MEAS gt lt MEAS OBJECT LE gt max lt TIT lt VALUE RES lt MEAS gt MEAS OBJECT TIT VALUE RES MEAS ITLE max LE bloc Ri TITLE T kgf TYPE MAX gt 0 lt VALUE gt brakeforce ULT 1 UNIT ROAD_FRICTION LOC LEFT gt el drag Le lt TITLE gt ULT 1 U IT kgf gt 0 lt VALUE gt ROAD FRICTION LOC RIGHT gt el drag Ri TITLE ULT 1 U IT kgf gt 0 lt VALUE gt IN_PRESSURE gt ULT 1 UNIT Bar gt lt VALUE gt P ULT RESSURE PM TITLE 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt D RESSURE_PZ gt PZ lt TITLE gt ULT 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt PEDALFORCE gt pedal force lt TITLE gt ULT 1 UNIT kgf TYPE MAX HIGHLIM1 68 gt 0 lt VALUE gt BRAKEFORCE k difference TITLE ULT 1 UNIT TYPE DELTA CONDITION 1 HIGHLIM1 30 gt 0 lt VALUE gt lt MEAS OBJECT BRAKEFORCE gt lt T
7. of 22 Appendix 1 Emergency Stop Device Important The installation of all emergency stop devices must meet with all Health and Safety regulations and must also comply with all the equipment manufacturers requirements In addition to these requirements the Authority recommends that where appropriate the installation of useful and appropriately located emergency stop devices that enhance the safety of personnel working within the test centre Function In the event of an emergency there should be EU approved emergency stop device s with means of cutting the power supply to the motors on both sets of rollers if the function alleviates the level of danger should an emergency incident arise Basic Requirements of an Emergency Stop Device e Where required equipment must be fitted with emergency stop s to enable actual or impending danger to be averted quickly as possible unless an emergency stop device would not lessen the risk e he emergency stop device must be clearly identifiable clearly visible and quickly accessible e The emergency stop function must be available and operational at all times regardless of the operating mode e Disengaging the emergency stop device must not restart the machinery but only permit restarting e Emergency stop devices must be a back up to other safeguarding measures Routine checks and maintenance In the case of the emergency stop devices frequent inspections should be considered part of
8. storage shall be provided for the remote control unit when not in use In addition there shall be m A visual indication for the user on the display console showing i When each roller set is in operation and ii If the RBT has a bi directional facility whether the roller sets are operating in forward or reverse direction n No access to the end user to switch on the automatic start up facility i e an automatic facility should not be accessible by the end user Section 4 4 1 Roller specification The rollers shall have a A surface coating such as a plastic corundum that is durable and not likely to cause undue tyre damage i e a metal mesh or metal weld splatter is not acceptable b A roller to tyre co efficient of friction of not less than 6096 in wet conditions c The following dimensions i Minimum outer diameter 200mm ii Minimum length of 1000mm of the cylinder iii Not greater than 500mm between roller centres iv Not greater than 880mm between inner ends of high friction surfaces of left right rollers v Not less than 2 800mm between outer ends of high friction surfaces of left right rollers vi When running a constant surface speed in the range 2 to 5 5km h NOTE The speed of the rollers shall remain within the specified range throughout the full range of brake force Page 3 of 22 Section 5 5 1 Roller Set Specification Mechanical The Roller set shall have an integrated weighing
9. 0 10 2014 09 29 55 with AWNX32 dll Version 1 2 1 Build 28 gt RESULTS lt RESULTSHEADER gt lt COUNTRY gt lt REGULATION gt GERMAN lt REGULATION gt lt LANGUAGE gt GERMAN lt LANGUAGE gt lt COUNTRY gt lt CUSTOMER gt lt NAME gt lt NAME gt lt ADDRESS gt f lt ADDRESS gt lt CITY gt lt CITY gt lt ZIP gt N3 lt ZIP gt lt CUSTOMER gt lt VEHICLE gt lt IDENT gt lt REGISTRATION gt 08 Mx 3091 lt REGISTRATION gt lt MANUFACTURER gt Scania lt MANUFACTURER gt lt MODEL gt OTHER lt MODEL gt lt VIN gt 9131553 lt VIN gt lt IDENT gt lt DATA gt lt ODOMETER gt lt ODOMETER gt lt DATA gt lt VEHICLE gt lt RESULTSHEADER gt lt RESULT OBJECT BRAKE METHOD DETAILED gt TITLE Bremsenpr fung TITLE HEADER EQUIPMENT TYPE Videoline gt lt MANUFACTURER gt RSATEST lt MANUFACTURER gt lt VERSION gt SW V 5 182C lt VERSION gt lt EQUIPMENT gt lt HEADER gt lt SECTION OBJECT STANDARD AXLE 1 gt lt TITLE gt Vorderachse lt TITLE gt lt MEAS OBJECT CALC_PRESSURE gt lt TITLE gt calculation press lt TITLE gt VALUE RESULT 1 UNIT Bar SOURCE HAND gt 6 5 lt VALUE gt lt MEAS gt Page 14 of 22 MEAS OBJECT ROAD_FRICTION LOC LEFT gt lt TITLE gt wheel drag Le lt TITLE gt lt VALUE RESULT 1 UNIT kgf gt 22 lt VALUE gt lt MEAS gt lt MEAS OBJECT ROAD_FRICTION LOC RIGHT gt lt TITLE gt wheel
10. 7 of 22 VALUE RESULT 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt lt MEAS gt lt MEAS OBJECT PEDALFORCE gt lt TITLE gt max pedal force lt TITLE gt lt VALUE RESULT 1 UNIT kgf TYPE MAX HIGHLIM1 68 gt 0 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKEFORCE gt TITLE gt block difference lt TITLE gt VALUE RESULT 1 UNIT TYPE DELTA CONDITION 1 HIGHLIM1 30 gt 10 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKEFORCE gt lt TITLE gt max difference lt TITLE gt VALUE RESULT 1 UNIT TYPE DELTA HIGHLIM1 30 gt lt VALUE gt lt MEAS gt lt MEAS OBJECT OVALITY LOC LEFT gt lt TITLE gt ovality left lt TITLE gt lt VALUE RESULT 1 UNIT HIGHLIM1 40 gt lt VALUE gt lt MEAS gt lt MEAS OBJECT OVALITY LOC RIGHT gt lt TITLE gt ovality right lt TITLE gt lt VALUE RESULT 1 UNIT HIGHLIM1 40 gt lt VALUE gt lt MEAS gt lt MEAS OBJECT WHEEL_WEIGHT_DYN LOC LEFT gt lt TITLE gt wheel weight Le lt TITLE gt VALUE RESULT 1 UNIT Kg gt lt VALUE gt lt MEAS gt lt MEAS OBJECT WHEEL_WEIGHT_DYN LOC RIGHT gt TITLE Wheel weight Ri TITLE VALUE RESULT 1 UNIT Kg gt lt VALUE gt lt MEAS gt lt MEAS OBJECT WHEEL_WEIGHT_STAT LOC LEFT gt lt TITLE gt wheel weight Le lt TITLE gt lt VALUE RESULT 1 UNIT Kg gt 349 lt VALUE gt lt MEAS gt MEAS OBJECT WHEEL_WEIGHT_STAT LOC RIGHT gt lt TITLE gt Wh
11. IM1 0 gt 0 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKEFORCE gt lt TITLE gt block difference lt TITLE gt lt VALUE RESULT 1 UNIT TYPE DELTA CONDITION 1 HIGHLIM1 50 gt 2 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKEFORCE gt lt TITLE gt max difference lt TITLE gt lt VALUE RESULT 1 UNIT TYPE DELTA HIGHLIM1 50 gt 20 lt VALUE gt lt MEAS gt lt MEAS OBJECT OVALITY LOC LEFT gt lt TITLE gt ovality left lt TITLE gt lt VALUE RESULT 1 UNIT HIGHLIM1 40 gt lt VALUE gt lt MEAS gt MEAS OBJECT OVALITY LOC RIGHT gt lt TITLE gt ovality right lt TITLE gt VALUE RESULT 1 UNIT HIGHLIM1 40 gt lt VALUE gt Page 21 of 22 lt MEAS gt lt MEAS OBJECT WHEEL_WEIGHT_DYN LOC LEFT gt lt TITLE gt wheel weight Le lt TITLE gt lt VALUE RESULT 1 UNIT Kg gt lt VALUE gt lt MEAS gt MEAS OBJECT WHEEL_WEIGHT_DYN LOC RIGHT gt TITLE Wheel weight Ri TITLE VALUE RESULT 1 UNIT Kg gt lt VALUE gt lt MEAS gt lt MEAS OBJECT WHEEL_WEIGHT_STAT LOC LEFT gt lt TITLE gt wheel weight Le lt TITLE gt lt VALUE RESULT 1 UNIT Kg gt 349 lt VALUE gt lt MEAS gt lt MEAS OBJECT WHEEL_WEIGHT_STAT LOC RIGHT gt TITLE Wheel weight Ri TITLE VALUE RESULT 1 UNIT Kg gt 429 lt VALUE gt lt MEAS gt MEAS OBJECT AXLE_WEIGHT gt TITLE wheel weight Le Ri lt TITLE
12. IT lt VALUE RES EAS gt lt LE gt max difference lt TITLE gt ULT 1 UNIT TYPE DELTA HIGHLIM1 30 gt lt VALUE gt lt MEAS OBJECT OVALITY LOC LEFT gt lt TIT lt VALUE RES EAS gt lt MEAS OBJECT OVALITY LE ovality right lt TITLE gt TIT VALUE RES EAS lt LE gt oval ity left lt TITLE gt ULT 1 UNIT HIGHLIM1 40 gt lt VALUE gt LOC RIGHT gt ULT 1 UNIT HIGHLIM1 40 gt lt VALUE gt lt MEAS OBJECT WHEEL_WEIGHT_DYN LOC LEFT gt lt TIT lt VALUE RES EAS gt lt LE gt whe el weight Le lt TITLE gt ULT 1 UNIT Kg gt lt VALUE gt lt MEAS OBJECT WHEEL_WEIGHT_DYN LOC RIGHT gt lt TIT lt VALUE RES EAS gt lt LE Wheel weight Ri TITLE ULT 1 UNIT Kg gt lt VALUE gt lt MEAS OBJECT WHEEL_WEIGHT_STAT LOC LEFT gt lt TIT LE gt whe el weight Le lt TITLE gt lt VALUE RES ULT 1 UNIT Kg gt 349 lt VALUE gt Page 20 of 22 MEAS MEAS OBJECT2 WHEEL WEIGHT STAT LOC RIGHT gt TITLE Wheel weight Ri TITLE VALUE RESULT 1 UNIT Kg gt 432 lt VALUE gt lt MEAS gt lt MEAS OBJECT AXLE_WEIGHT gt TITLE wheel weight Le Ri lt TITLE gt VALUE RESULT 1 UNIT Kg gt 781 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKING_RATIO gt lt TITLE gt axle deceleration lt TITLE gt lt VALUE RESULT 3 UNIT LOWLIM1 40 gt 0 lt
13. LUE gt lt MEAS gt lt MEAS OBJECT PRESSURE_PM gt lt TITLE gt max PM lt TITLE gt VALUE RESULT 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt lt MEAS gt lt MEAS OBJECT PRESSURE_PZ gt lt TITLE gt max PZ lt TITLE gt VALUE RESULT 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt lt MEAS gt lt MEAS OBJECT PEDALFORCE gt lt TITLE gt max pedal force lt TITLE gt VALUE RESULT 1 UNIT kgf TYPE MAX HIGHLIM1 0 gt 0 lt VALUE gt lt MEAS gt MEAS OBJECT BRAKEFORCE gt lt TITLE gt block difference lt TITLE gt lt VALUE RESULT 1 UNIT TYPE DELTA CONDITION 1 HIGHLIM1 50 gt 3 lt VALUE gt lt MEAS gt MEAS OBJECT BRAKEFORCE gt lt TITLE gt max difference lt TITLE gt lt VALUE RESULT 1 UNIT TYPE DELTA HIGHLIM1 50 gt 14 lt VALUE gt lt MEAS gt MEAS OBJECT OVALITY LOC LEFT gt lt TITLE gt ovality left lt TITLE gt lt VALUE RESULT 1 UNIT HIGHLIM1 40 gt lt VALUE gt lt MEAS gt lt MEAS OBJECT OVALITY LOC RIGHT gt lt TITLE gt ovality right lt TITLE gt lt VALUE RESULT 1 UNIT HIGHLIM1 40 gt lt VALUE gt lt MEAS gt lt MEAS OBJECT WHEEL_WEIGHT_DYN LOC LEFT gt lt TITLE gt wheel weight Le lt TITLE gt lt VALUE RESULT 1 UNIT Kg gt lt VALUE gt lt MEAS gt lt MEAS OBJECT WHEEL_WEIGHT_DYN LOC RIGHT gt TITLE Wheel weight Ri TITLE VALUE RESULT 1 UNIT Kg gt lt VALUE gt lt MEAS g
14. RBT must provide a start date time for each test h The RBT must provide an end date time for each test i The RBT must provide the Serial Number of the Equipment used for each test NOTE Further detail is shown in Appendix 5 Page 5 of 22 9 3 Input Test order detail from CoVIS Use the standard ASANetwork requirements input data a CoVIS sends the following for all test orders i Order type id ii Order Description iii Reg No iv EU Vehicle Category v Date of first registration vi No Axles vii Fuel Type Section 10 10 1 Documentation Identification a The RBT shall have a durable identification mark on its exterior or its control unit showing the make model and serial number b The manufacturer of the RBT shall provide a clear and easy to understand user manual written in English and available at any time to the test centre which shall explain how it operates including the function of each aspect of the RBT c The manufacturer of the RBT shall provide a recommended maintenance procedure It shall highlight key components and wear parts that affect the accuracy of measurement values Section 11 11 1 Calibration a The Calibration service provider as part of their quality programme shall adhere to the CITA 9B Quality Requirements see Appendix 4 11 2 Brake Force Measurement and verification key points The calibration procedure shall a Be capable of checking brake force accuracy at the
15. UE RESULT 1 UNIT Kg gt lt VALUE gt lt MEAS gt lt MEAS OBJECT WHEEL_WEIGHT_DYN LOC RIGHT gt TITLE Wheel weight Ri TITLE VALUE RESULT 1 UNIT Kg gt lt VALUE gt lt MEAS gt Page 15 of 22 MEAS OBJECT BRAKING_RATIO gt TITLE axle deceleration TITLE VALUE RESULT 3 UNIT LOWLIM1 40 gt 34 lt VALUE gt lt MEAS gt MEAS OBJECT TRACK gt lt TITLE gt track lt TITLE gt lt VALUE RESULT 1 UNIT m km HIGHLIM1 14 0 gt 3 6 lt VALUE gt lt MEAS gt lt STEP gt lt MEAS OBJECT ROAD_FRICTION LOC LEFT gt lt TITLE gt wheel drag Le lt TITLE gt lt VALUE RESULT 1 UNIT kgf gt 16 lt VALUE gt lt MEAS gt lt MEAS OBJECT ROAD_FRICTION LOC RIGHT gt lt TITLE gt wheel drag Ri lt TITLE gt lt VALUE RESULT 1 UNIT kgf gt 14 lt VALUE gt lt MEAS gt lt MEAS OBJECT MIN_PRESSURE gt lt TITLE gt contact pressure lt TITLE gt VALUE RESULT 1 UNIT Bar gt lt VALUE gt lt MEAS gt MEAS OBJECT PRESSURE_PM gt lt TITLE gt max PM lt TITLE gt VALUE RESULT 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt lt MEAS gt lt MEAS OBJECT PRESSURE_PZ gt lt TITLE gt max PZ lt TITLE gt VALUE RESULT 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt lt MEAS gt lt MEAS OBJECT PEDALFORCE gt lt TITLE gt max pedal force lt TITLE gt lt VALUE RESULT 1 UNIT kgf TYPE MAX HIGHLIM1 0 gt 0 lt VALUE gt
16. acticable inform the owners keepers of the affected vehicles and invite them immediately for re inspection making it clear that there will be no charge for the inspection 6 3 6 The calibration status shall be shown clearly on relevant vehicle inspection equipment preferably by means of suitable markers or labels indicating at least the date of the last calibration and the date the next calibration is due 6 3 7 Reference measurement standards held by the inspection body shall be used for calibration only and not for other purposes Only competent bodies who can provide traceability to international or national measurement standards shall calibrate reference measurement standards 6 3 8 The inspection body shall keep records of all calibrations performed Page 13 of 22 Appendix 5 Sample XML Stream sent to CoVIS from ASANetwork Important Note o The highlighted content in the sample below shows the minimum fields required for Axle 1 only All XML must be valid or will be rejected 000000 The data must be returned to ASANetwork in the correct format The sample file contains results for a 4 axle vehicle XML should output all raw data including decimal values The results must relate to the test Order ID received from CoVIS The registration number is not read when processing the results SAMPLE ONLY lt xml version 1 0 encoding ISO 8859 1 standalone no gt IDOCTYPE RESULTS SYSTEM awnres dtd gt lt Created 3
17. brake forces are 40kgf or less ii function when one or both brake forces exceed 40kgf and one brake force is less than 7096 of the other and display the numerical difference between left and right brake forces as a percentage of the higher brake force i e Imbalance 96 high force low force X 100 high force Section 9 9 1 Connection to CoVIS a The host PC must be capable of connecting to the CoVIS network via the internal test centre network or directly to the CoVIS LAN b The RBT and its host must have the capability to receive test orders transmitted by CoVIS and return test results to CoVIS using the ASA network secure common industry standard interface see example in Appendix 5 below 9 2 Outputs required for CoVIS a The RBT shall have the capacity to electronically transmit maximum test measurement values for the following i Left and right service brakes on each axle ii Left and right parking brakes on the applicable axle s iii Left and right secondary brakes on the applicable axle s iv Left and right disk drum ovality on each axle v Axle number Static Presented Weight of each axle vi Pedal force applied on each axle test vii A minimum 3 pressure sensor values for each axle test It must transmit the measurement values C The unit of brake force and pedal force measurement returned will contain the value in kgf d The unit of static weight in Kilograms e The pressure in Bar f g The
18. drag Ri lt TITLE gt lt VALUE RESULT 1 UNIT kgf gt 22 lt VALUE gt lt MEAS gt lt MEAS OBJECT MIN_PRESSURE gt lt TITLE gt contact pressure lt TITLE gt VALUE RESULT 1 UNIT Bar gt lt VALUE gt lt MEAS gt MEAS OBJECT PRESSURE_PM gt lt TITLE gt max PM lt TITLE gt VALUE RESULT 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt lt MEAS gt MEAS OBJECT PRESSURE_PZ gt lt TITLE gt max PZ lt TITLE gt VALUE RESULT 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt lt MEAS gt lt MEAS OBJECT PEDALFORCE gt lt TITLE gt max pedal force lt TITLE gt lt VALUE RESULT 1 UNIT kgf TYPE MAX HIGHLIM1 68 gt 0 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKEFORCE gt lt TITLE gt block difference lt TITLE gt lt VALUE RESULT 1 UNIT TYPE DELTA CONDITION 1 HIGHLIM1 30 gt 1 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKEFORCE gt lt TITLE gt max difference lt TITLE gt lt VALUE RESULT 1 UNIT TYPE DELTA HIGHLIM1 30 gt lt VALUE gt lt MEAS gt lt MEAS OBJECT OVALITY LOC LEFT gt lt TITLE gt ovality left lt TITLE gt lt VALUE RESULT 1 UNIT HIGHLIM1 40 gt lt VALUE gt lt MEAS gt lt MEAS OBJECT OVALITY LOC RIGHT gt lt TITLE gt ovality right lt TITLE gt VALUE RESULT 1 UNIT HIGHLIM1 40 gt lt VALUE gt lt MEAS gt lt MEAS OBJECT WHEEL_WEIGHT_DYN LOC LEFT gt lt TITLE gt wheel weight Le lt TITLE gt VAL
19. eel weight Ri lt TITLE gt lt VALUE RESULT 1 UNIT Kg gt 438 lt VALUE gt lt MEAS gt lt MEAS OBJECT AXLE_WEIGHT gt TITLE wheel weight Le Ri lt TITLE gt lt VALUE RESULT 1 UNIT Kg gt 787 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKING_RATIO gt lt TITLE gt axle deceleration lt TITLE gt lt VALUE RESULT 1 UNIT LOWLIM1 40 gt 57 lt VALUE gt lt MEAS gt lt MEAS OBJECT TRACK gt lt TITLE gt track lt TITLE gt lt VALUE RESULT 1 UNIT m km HIGHLIM1 14 0 gt 0 0 lt VALUE gt lt MEAS gt lt STEP gt lt STEP OBJECT PARKING_BRAKE gt lt TITLE gt Handbremse lt TITLE gt lt MEAS OBJECT BRAKEFORCE LOC LEFT gt lt TITLE gt max brakeforce Le lt TITLE gt VALUE RESULT 1 UNIT kgf TYPE MAX gt 208 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKEFORCE LOC RIGHT gt lt TITLE gt max brakeforce Ri lt TITLE gt lt VALUE RESULT 1 UNIT kgf TYPE MAX gt 213 lt VALUE gt lt MEAS gt lt MEAS OBJECT ROAD_FRICTION LOC LEFT gt lt TITLE gt wheel drag Le lt TITLE gt lt VALUE RESULT 1 UNIT kgf gt 11 lt VALUE gt lt MEAS gt lt MEAS OBJECT ROAD_FRICTION LOC RIGHT gt lt TITLE gt wheel drag Ri lt TITLE gt O Page 18 of 22 lt VALUE RESULT 1 UNIT kgf gt 19 lt VALUE gt lt MEAS gt lt MEAS OBJECT MIN_PRESSURE gt TITLE gt contact pressure lt TITLE gt lt VALUE RESULT 1 UNIT Bar gt lt VA
20. evant requirements and its continued suitability and to provide confidence in decisions based on measurements 6 3 2 The calibration procedures sometimes known as calibration programmes shall define the calibration processes their environmental conditions their frequency the acceptance criteria and the action to be taken when the results are found unsatisfactory and or inadequate 6 3 3 Quality relevant vehicle inspection equipment shall be calibrated before first use and at least at the following frequencies during in service use or at other frequencies as prescribed in national regulations NOTE All calibration frequencies mentioned in the CITA requirements have been omitted from this Appendix as they are superseded by the prescribed calibration frequencies outlined in the Premises amp Equipment Guidelines 6 3 4 Calibration shall be done where appropriate against certified equipment having a known and traceable relationship to internationally or nationally recognised standards Where no such standards exist the basis used for calibration shall be fully documented according to the equipment manufacturer s recommendation if any 6 3 5 If vehicle inspection equipment is found to be out of calibration or there are any other systematic errors the validity of the vehicle inspection results since the date of last calibration shall be re assessed If there was any relevant non conformity the vehicle inspection body shall as soon as pr
21. gt lt VALUE RESULT 1 UNIT Kg gt 778 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKING_RATIO gt lt TITLE gt axle deceleration lt TITLE gt lt VALUE RESULT 1 UNIT LOWLIM1 40 gt 58 lt VALUE gt lt MEAS gt lt MEAS OBJECT TRACK gt lt TITLE gt track lt TITLE gt lt VALUE RESULT 1 UNIT m km HIGHLIM1 14 0 gt 0 0 lt VALUE gt lt MEAS gt lt STEP gt lt SECTION gt lt SUMMARY gt lt TITLE gt Ergebnis lt TITLE gt lt MEAS OBJECT TOTAL_WEIGHT gt lt TITLE gt Gesamtgewicht lt TITLE gt lt VALUE UNIT Kg gt 2888 lt VALUE gt lt MEAS gt lt STEP OBJECT SERVICE_BRAKE gt lt TITLE gt Betriebsbremse lt TITLE gt lt MEAS OBJECT BRAKING_RATIO gt lt TITLE gt Abbremsung bez auf gem Gewicht lt TITLE gt lt VALUE UNIT LOWLIM1 45 RESULT 3 gt 31 lt VALUE gt lt MEAS gt lt MEAS OBJECT MEAN_BRAKING_RATIO_SC gt lt TITLE gt Mittlere Vollverz gerung TITLE VALUE UNIT m s2 gt 6 7689 lt VALUE gt lt MEAS gt lt STEP gt lt STEP OBJECT PARKING_BRAKE gt lt TITLE gt Handbremse lt TITLE gt lt MEAS OBJECT BRAKING_RATIO gt lt TITLE gt Abbremsung bez auf gem Gewicht lt TITLE gt lt VALUE UNIT LOWLIM1 16 RESULT 1 gt 46 lt VALUE gt lt MEAS gt lt STEP gt lt SUMMARY gt SECTION OBJECT VISUAL_INSPECTION gt lt SECTION gt lt RESULT gt lt RESULTS gt Page 22 of 22
22. least 3 sensors fitted to the vehicle extrapolation c Pedal Force values applied d EU type approval brake curves e Brake reference values values supplied by vehicle manufacturer f Brake force as a percentage of the presented static vehicle weight Also g The RBT printout report shall have the capability of including all of the above measurement values for the purposes of evaluating the brake performance of the vehicle h Pass fail criteria must correspond to the limits applied by the RSA and stored within CoVIS for brake performance and imbalance on each axle NOTE Point b and c can be supplied as a retro fit The RBT shall have the capability to communicate with the additional equipment at the initial installation of the RBT Section 2 2 1 Roller Set drive motor control system NOTE HCV roller set drive motors must only start under the control of the tester and will not start up automatically The roller sets shall have a A means of preventing either roller set operating unless both left and right wheel sets are correctly located in the RBT except following calibration in which case it shall be operated by the authorised RBT technician only b The ability to be driven separately or simultaneously c A means of manually stopping both roller sets from the remote control and from the console when correctly occupied by an axle i e if you press the stop button for either roller then both rollers sha
23. ll stop d An automatic means of stopping either roller set individually when the tyre to roller slip reaches a pre set limit in the range 20 to 30 e An emergency stop function that is triggered from any emergency stop device located within the HCV test lane see Appendix 1 for further detail f A means to detect if a brake is applied on start up of the roller set and switch off drive motors to prevent possible tyre damage 2 2 Slip Conditions a The slip value remains below the limit throughout the full range of brake force b A tyre to roller slip of 2096 is when the surface speed of the vehicle wheel tyre equals 8096 of the surface speed of the RBT rollers c When both roller sets are running simultaneously and one wheel locks out the RBT shall have the capability to i Allow the other wheel continue to rotate until maximum brake force is achieved and record the readings at that instance AND ii Stop the other wheel from rotating and record the readings at that instance NOTE For the avoidance of doubt the RBT should have the facility to operate both of the above options as directed by the Authority Page 2 of 22 Section 3 3 1 User Controls NOTE Automatic operation of a RBT is not permitted The user controls remote control shall be a Manually operated b Suitably identified in English or with acceptable intuitive symbols c Capable of starting the roller sets independently or simultaneously
24. lt MEAS gt lt MEAS OBJECT BRAKEFORCE gt lt lt VALUE RES lt MEAS gt MEAS OBJECT lt VALUE RES lt MEAS gt MEAS OBJECT TITLE gt oval lt VALUE RES lt MEAS gt MEAS OBJECT p VALUE RES MEAS OVALITY ity OVALITY TITLE gt ovality right lt 1 ULT 1 UN lt MEAS OBJECT ULT 1 U TITLE gt block difference lt TITLE gt ULT 1 UNIT TYPE DELTA CONDITION 1 HIGHLIM1 50 gt 2 lt VALUE gt BRAKEFORCE TITLE max difference TITLE ULT 1 UNIT T TYPE DELTA HIGHLIM1 50 gt 15 lt VALUE gt LOC LEFT gt ILE IT HIGHLIM1 40 gt lt VALUE gt left TIT LOC RIGHT gt ITLE gt IT HIGHLIM1 40 gt lt VALUE gt T WHEEL_WEIGHT_DYN LOC LEFT gt Page 16 of 22 TITLE wheel weight Le TITLE VALUE RESULT 1 UNIT Kg gt lt VALUE gt lt MEAS gt MEAS OBJECT WHEEL_WEIGHT_DYN LOC RIGHT gt TITLE Wheel weight Ri TITLE VALUE RESULT 1 UNIT Kg gt lt VALUE gt lt MEAS gt lt lt MEAS OBJECT BRAKING_RATIO gt lt TITLE gt axle deceleration lt TITLE gt lt VALUE RESULT 1 UNIT LOWLIM1 40 gt 57 lt VALUE gt lt MEAS gt lt MEAS OBJECT TRACK gt TITLE gt track lt TITLE gt lt VALUE RESULT 1 UNIT m km HIGHLIM1 14 0 gt 3 6 lt VALUE gt lt MEAS gt lt STEP gt lt SECTION gt lt SECTION OBJECT STANDARD AXLE 2 gt lt TITLE gt Hinte
25. mechanism and its mechanical design shall have a A drive system capable of a 15096 of the max torque applied b A slip bar mechanism that monitors wheel tyre rotation speed and occupation of roller set The slip bar must have a sufficient range to ensure it can operate from all tyres usually fitted to a vehicles tested in the HCV test lane c CE approved guards in particular chain and sprocket guards It is also recommended that the Roller set shall have d A raised roller on the rear designed to maximise the lateral force applied by the wheel e A lowered roller on the front to assist in drive out and ensure vehicle is predominantly level when an axle is in the roller set Section 6 6 1 Roller set Specification features The roller set shall have the following features a A drive out assistance in the form of a speed limiting or a locking mechanism of the roller b Soft start control of the drive motors c Permanent four wheel drive capability using the single wheel counter rotation method d Roller speed detector to monitor the drive roller speed The slip bar speed detector shall be compared to the roller speed detector m nn I Section 7 7 1 Brake Force Display The brake force display shall a Indicate in units of kilogram force kgf b Indicate the brake force individually for each wheel on an axle c Be analogue and sufficiently sensitive to show the variations in brake force caused by excessive dr
26. rachse lt TITLE gt lt MEAS OBJECT CALC_PRESSURE gt lt TITLE gt calculation press lt TITLE gt VALUE RESULT 1 UNIT Bar SOURCE HAND gt 6 5 lt VALUE gt lt MEAS gt lt MEAS OBJECT AXLE_WEIGHT gt lt TITLE gt input weight lt TITLE gt lt VALUE RESULT 1 UNIT Kg SOURCE HAND gt 787 lt VALUE gt lt MEAS gt lt STEP OBJECT SERVICE_BRAKE gt lt TITLE gt Betriebsbremse lt TITLE gt EAS OBJECT BRAKEFORCE LOC LEFT gt lt TITLE gt max brakeforce Le lt TITLE gt lt VALUE RESULT 1 UNIT kgf TYPE MAX gt 213 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKEFORCE LOC RIGHT gt lt TITLE gt max brakeforce Ri lt TITLE gt lt VALUE RESULT 1 UNIT kgf TYPE MAX gt 238 lt VALUE gt lt MEAS gt lt MEAS OBJECT ROAD_FRICTION LOC LEFT gt lt TITLE gt wheel drag Le lt TITLE gt lt VALUE RESULT 1 UNIT kgf gt 11 lt VALUE gt lt MEAS gt lt MEAS OBJECT ROAD_FRICTION LOC RIGHT gt lt TITLE gt wheel drag Ri lt TITLE gt VALUE RESULT 1 UNIT kgf gt 16 lt VALUE gt lt MEAS gt lt MEAS OBJECT MIN_PRESSURE gt lt TITLE gt contact pressure lt TITLE gt VALUE RESULT 1 UNIT Bar gt lt VALUE gt lt MEAS gt MEAS OBJECT PRESSURE_PM gt lt TITLE gt max PM lt TITLE gt VALUE RESULT 1 UNIT Bar TYPE MAX gt 0 00 lt VALUE gt lt MEAS gt MEAS OBJECT PRESSURE_PZ gt TITLE max PZ lt TITLE gt Page 1
27. ris surrounding the roller set pit that may affect the free movement of the suspended roller set and in turn the accuracy of the weight readings NOTE These are minimum key points for compilation of a condition report Any other check recommended by the Equipment manufacturer should be included Page 11 of 22 Appendix 3 Printout report Key Points a The test values on the print out report must match the data values returned to ASANetwork for CoVIS i e where a value is calculated and presented with no decimal places b The value will be rounded down to no decimal place c The Printout shall display the brake force in units of Kilogram force KGF d The Printout shall display the weight in kilograms KG e The Printout report shall have the capacity to change the printed brake force unit to Kilo newton Kn by means of a software setting f The RBT shall have the capability to operate independent of Covis and produce a g Printed report The Printout must include at minimum the following details on the report Test Centre Details Name Address Centre number Completion Time and date of test dd mm yyyy hh mm Duration of Brake Test minutes and seconds Vehicle Registration Registration Vehicle category HCV or LCV Vehicle odometer reading odometer reading Detail requirements for each axle o Axle weight KG Max Service brake force Left KGF Max Service brake force Right KGF
28. s shall be accurate to within i 3 kgf of the true value from zero up to and including 100 kgf ii 3 per cent of the true value for all readings above 100 kgf e The RBT brake force calibration device shall be accurate to within i 0 3 kgf of the true value from zero up to and including 100 kof ii 0 3 per cent of the true value for all readings above 100 kgf 11 4 Weight Calibration The calibration equipment shall a Be capable of checking mass axle weight up to minimum 596 of the end range value of the RBT If the weight measurement is displayed on a VDU the accuracy of the weight measurement shall be judged against the digital values Traditional dials shall indicate the same values if applicable b Have a method and operational accuracy that is certified and traceable to a national physical standard Also c All component parts of the calibration device including any mobile weight scale handset shall be individually marked with an identity number to enable all parts to be kept together as a set or as according to the certificate requirements The certificate shall relate to the set and each calibration device produced shall require its own certificate d If the certificate or any other relevant document produced for the calibration device is not in English the applicant shall make available a translation into English e When the static calibration has been completed a drive on test of the target weigh
29. sprocket aligned with chain tensioner and roller sprockets Electrical instrumentation and control unit Emergency stop devices are operating correctly and are accessible Strain gauge is in good condition and is correctly positioned Detectable play is within manufacturer s specification Slip bar sensors are not damaged and have adequate clearance Cables are neatly strapped and clear of moving mechanical parts All junction boxes are clean and dry in good condition and lids closed with adequate screws Cable Ducting conduit in good condition and mounted correctly Cable glands are tight Remote control casing is in good condition and battery life is adequate for uninterrupted vehicle testing Correct time and date EU format is noted on RBT host PC Reference against Covis PC Automatic summer time adjustment is set and configured for local Irish time and settings Page 10 of 22 Mechanical roller set No detectable rocking present in the roller set load cell mounting points Plates guards are not damaged or missing and all bolts retaining them are present and tight Slip bar spins smoothly and freely with no detectable vibration or play in the bearings Slip bar is not damaged or bent bar does not rotate off centre Travel mechanism of slip bar operates evenly and smoothly Spring gas strut on slip bar travel mechanism operates in the full range End stops are in good condition e Free of obstruction or excessive dirt and deb
30. t lt MEAS OBJECT WHEEL_WEIGHT_STAT LOC LEFT gt lt TITLE gt wheel weight Le lt TITLE gt lt VALUE RESULT 1 UNIT Kg gt 352 lt VALUE gt lt MEAS gt MEAS OBJECT WHEEL_WEIGHT_STAT LOC RIGHT gt TITLE Wheel weight Ri TITLE VALUE RESULT 1 UNIT Kg gt 432 lt VALUE gt lt MEAS gt MEAS OBJECT AXLE_WEIGHT gt lt TITLE gt wheel weight Le Ri lt TITLE gt lt VALUE RESULT 1 UNIT Kg gt 784 lt VALUE gt lt MEAS gt lt MEAS OBJECT BRAKING_RATIO gt lt TITLE gt axle deceleration lt TITLE gt lt VALUE RESULT 1 UNIT LOWLIM1 40 gt 54 lt VALUE gt lt MEAS gt lt MEAS OBJECT TRACK gt lt TITLE gt track lt TITLE gt lt VALUE RESULT 1 UNIT m km HIGHLIM1 14 0 gt 0 0 lt VALUE gt lt MEAS gt lt STEP gt lt SECTION gt lt SECTION OBJECT STANDARD AXLE 3 gt lt MEAS OBJECT CALC_PRESSURE gt lt TITLE gt calculation press lt TITLE gt N Page 19 of 22 lt lt VALUE RES EAS gt UL T 1 UNIT Bar SOURCE HAND gt 6 5 lt VALUE gt lt MEAS OBJECT AXLE_WEIGHT gt lt lt STEP lt TIT lt VALUE RES EAS gt OBJECT LE gt Betri UL TIT TITLE max VALUE RES EAS lt SERVICE_BRA ebsbremse lt TITLE gt EAS OBJECT BRAKEFORCE LOC LEFT gt LE gt input weight lt TITLE gt T 1 UNIT Kg SOURCE HAND gt 781 lt VALUE gt E gt brakeforce Le lt TITLE
31. t axle used in calibration in normal operating mode shall verify the weight readings f The RBT weigh scales readings shall be accurate to within i 3 kg of the true value from zero up to and including 100 kg ii 3 per cent of the true value for all readings between 200 and 3000kg g The RBT weigh scales calibration device shall be accurate to within i 0 3 kg of the true value from zero up to and including 100 kg ii 0 3 per cent of the true value for all readings above 100 kg Page 7 of 22 11 5 Calibration key points a The manufacturer of the RBT shall if requested provide a technical handbook in English with a description of the calibration technology for review by the RSA b The calibration procedure shall match the manufacturer s recommendation c For an initial set up the installer shall provide a calibration certificate d A person with recognised training of the RBT shall calibrate the equipment every 12 months or more frequently if required using calibration equipment as specified by the RBT manufacturer e A condition report shall be completed by a person with recognised training of the RBT and shall be carried out at 12 month intervals or if the RBT is potentially damaged in any way see Appendix 2 f Valid and current calibration certificates shall be scanned and uploaded to CoVIS An original hard copy shall be stored securely and made accessible for inspection for 12 months Page 8
32. the formal equipment routine inspection and testing process to ensure that they will operate in an actual emergency situation Page 9 of 22 Appendix 2 Recommended Minimum key points for compilation of a Condition report on a RBT Particular attention shall be made to the following and noted Rollers The high friction coating is not flat and smooth due to wear The high friction coating is evenly applied particularly in the case of local patching A bare metal patch in the high friction area does not exceed 2096 of the contact surface area of any given tyre The roller is perfectly cylindrical and free of dents Bearing mounts bolts are tight Roller bearings are smooth and running free with no play in shaft or vibration Bearing sets are greased or adequately lubricated Drive train Sprocket teeth are not excessively worn bent or broken All sprocket retention bolts are present and are sufficiently tightened Chain links are all present and in good condition Chain is tensioned correctly Chain is adequately greased but not over greased such that it is accumulating dirt Chain tensioning mechanism is in good condition where applicable Drive motor and gearbox Cooling fins on motor are cleared of dirt Bearing mounts on motor gearbox are tight Bearings are smooth and running free with no play in shaft or vibration Bearing sets are greased or adequately lubricated Drive sprocket not excessively worn bent or broken Drive
33. ucted line of sight and a clear view when in the driving position The display must have adequate visibility of the readings during the test procedure particularly in poor light conditions or bright sun light j Have the option of a wireless mobile display available K Ignore a test measurement value that is not part of the intended brake test e g when an axle is entering or exiting the RBT I Not commence a new vehicle test without clearing any existing measurements m Detect and ignore negative brake readings n Meet current health and safety regulations and RECI standards on its installation o The RBT and its controls when installed must not inhibit overview of the CCTV camera or the reading of the number plate due to use of ANPR ann a b c d a TS DN NOTE Detail on the equipment layout is found in the test lane guidelines section of the premises guidelines Teach Chluain Fearta Sraid Bhride Baile Locha Riach Co na Gaillimhe Clonfert House Bride Street Loughrea Co Galway Lo call 1890 40 60 40 Fax 091 872 660 Email info rsa ie Web www CVRT ie 1 2 Brake Performance Calculation The RBT must be capable of recording the static weight of each axle of the vehicle as presented It shall be capable of measuring and recording brake performance simultaneously against a Design Gross Vehicle Weight DGVW using axle load simulation present system b Air pressure applied using values from at
34. um ovality or disc run out d Include an additional digital display of brake force which shall be of a size that is readable from the vehicle driving position NOTE If the brake force is displayed on traditional dials an additional digital display of brake force is required e Have the means to display brake force values over two ranges i Low range max brake force value in the range 600 to 800kgf ii High range max brake force value in the range 3500 to 4500kgf f Indicate individually for each roller set when a wheel lock occurs g Retain the maximum brake force values shown until either the display is manually reset or the rollers are restarted h Have a provision for the brake force unit to be displayed in Kilo Newton KN by a software setting if a TV Computer monitor is used to display the values Page 4 of 22 Section 8 8 1 Brake Efficiency and Imbalance The RBT shall calculate and display the value of a Brake efficiency calculated from the total brake force and expressed as a percentage of the plated weight DGVW or static presented weight and imbalance of brake force between the left and right wheels on an axle expressed as a percentage of the higher brake force There shall be a provision to enter the appropriate weight into the RBT performance calculator prior to the test b The RBT is equipped with a device for indicating maximum brake imbalance it shall i be inhibited when both left and right

HCV Roller Brake Tester Specification

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