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Dynatest 1295 Operation Manual

Pavement friction tester
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Dynatest®
1295 PAVEMENT FRICTION TESTER
OPERATION MANUAL
Version 1.07
Dynatest North America, Inc.
11415 Old Roswell Road Suite 100
Alpharetta, Georgia USA
1 678-781-1799
PHONE: +
1 678-823-9952
FAX: +
E-mail:
MI@dynatest.com
Sep 2017
Dynatest 1295 Version 1.07
i

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  • Page 1 Dynatest® 1295 PAVEMENT FRICTION TESTER OPERATION MANUAL Version 1.07 Dynatest North America, Inc. 11415 Old Roswell Road Suite 100 Alpharetta, Georgia USA 1 678-781-1799 PHONE: + 1 678-823-9952 FAX: + E-mail: MI@dynatest.com Sep 2017 Dynatest 1295 Version 1.07...

  • Page 2: Table Of Contents

    Section 1 Introduction Introduction ..................1 Model 1295 System Description ............1 Principles of Operation ..............1 Daily Start-up Procedures ..............3 Model 1295 Electrical Systems Components ........4 1.5.1 Control Console ..............4, 5, 6 1.5.2 Portable Computer ............7 1.5.3 Embedded Data Acquisition System .........7 1.5.4...
  • Page 3 2.3.6.13 Vehicle Calibration Value ..........24 2.3.6.14 Last Calibration Value ..........24 2.3.6.15 Left Timer Count ............24 2.3.6.16 Right Timer Count .............25 2.3.6.17 Vehicle Timer ............25 2.3.6.18 Left Wheel Speed .............25 2.3.6.19 Right Wheel Speed ...........25 2.3.6.20 Vehicle Speed ............25 Dynatest 1295 Version 1.07 Sep 2017...
  • Page 4 Gain ..........31 2.5.2.3.2 Offset ...........31 Section 3 Setup Initial Setup of the Tow Vehicle and Trailer ........32 Initial Setup of the Computer For Testing .........33 General Software Organization ............34 Software Setup Process Outline ............36 Dynatest 1295 Version 1.07 Sep 2017...
  • Page 5 4.2.1.7.2 DMI Starting Distance ......43 4.2.1.7.3 Count UP or Down ......43 4.2.1.8 Miscellaneous ............... 4.2.1.8.1 System Units..............44 4.2.1.8.1.1 US/English .............44 4.2.1.8.1.2 Metric .............44 4.2.1.9 Test Watering ..............44 4.2.1.9.1 Wet ..............44 4.2.1.9.2 Dry ..............44 4.2.1.9.3 Pre-wet ..............44 Dynatest 1295 Version 1.07 Sep 2017...
  • Page 6 Trend Chart Field Definitions ..........48 4.3.2.1 SN Interval – Friction Trend Chart .......48 4.3.2.1.1 SN Average ........48 4.3.2.1.2 SN Max ..........48 4.3.2.1.3 SN Min ..........48 4.3.2.1.4 Y-Scale Min ........48 4.3.2.1.5 Y-Scale Max ........48 4.3.2.1.6 X-Scale ..........48 Dynatest 1295 Version 1.07 Sep 2017...
  • Page 7 Traction Force Standard Deviation ..52 4.3.2.6.3 Load Force Standard Deviation ..52 4.3.2.6.4 Vehicle Speed Standard Deviation ..52 4.3.2.6.5 Flow Rate Standard Deviation ...52 4.3.2.6.6 Y-Scale Min ........52 4.3.2.6.7 Y-Scale Max ........52 4.3.2.6.8 X-Scale ..........52 4.3.2.6.9 Auto Y-Scale ........52 Dynatest 1295 Version 1.07 Sep 2017...
  • Page 8 4.3.2.10.10 Manual Y-Scale ......56 4.3.2.11 Locking Interval – Flow Rate Trend Chart ...56 4.3.2.11.1 Flow Rate Average ......56 4.3.2.11.2 Flow Rate Max ........56 4.3.2.11.3 Flow Rate Min .........56 4.3.2.11.4 Flow Rate Peak .......56 Dynatest 1295 Version 1.07 Sep 2017 viii...
  • Page 9 4.4.6.5 TankTemperature Sensor ....60 4.4.7 Additional Equipment 4.4.7.1 Printer ..........60 4.4.7.2 GPS ............61 4.4.7.3 Right of Way Camera ......61 4.4.7.4 Vehicle Dash Display ......61 4.4.7.5 Inclinometer .........61 4.4.7.6 Accelerometer ........61 4.4.7.7 Texture Sensor ........61 Dynatest 1295 Version 1.07 Sep 2017...
  • Page 10 4.12.2.9 Load Average...........77 4.12.2.10 Load Max ............77 4.12.2.11 Load Min ............77 4.12.2.12 Load Standard Deviation ........77 4.12.2.13 Speed Average ..........77 4.12.2.14 Flow Average ...........77 4.12.2.15 Peak SN (PSN) ..........77 4.12.2.16 Time To Peak (TTP).........77 Dynatest 1295 Version 1.07 Sep 2017...
  • Page 11 Time To Lockup (TTL) ........77 4.13 Setups……………………………………………………………………..78 Section 5 Troubleshooting Troubleshooting ................79 Troubleshooting the Software ............79 5.2.1 Rebooting the 1295 Operating Software ......81 5.2.2 Troubleshooting the 1295 Electronics ........81 Section 6 Maintenance Preventative Maintenance ..............82 Service Schedule (Tow Vehicle) ............82 Service Schedule (Trailer) ..............83...

  • Page 12: Introduction

    The 1295 Pavement Friction Tester has been developed to perform dry or self-wetted locked wheel (skid) and peak incipient (slip) friction testing for paved surfaces (see Figure 1-1). The 1295 is designed to operate at speeds between 20 to 70 MPH (30 to 110 km/hr) while computing the dynamic skid number FN(t).
  • Page 13 SECTION 1 INTRODUCTION Figure 1-1. Model 1295 Pavement Friction Tester Dynatest 1295 Version 1.07 Sep 2017...

  • Page 14: Daily Start-Up Procedures

    It is necessary to calibrate of the DYNATEST 1295 system each time power has been turned off., Perform calibration on a level surface, with the tow vehicle in park, and your foot off the brake.

  • Page 15: Model 1295 Electrical Systems Components

    INTRODUCTION 1295 ELECTRICAL SYSTEM COMPONENTS All electric power for the 1295 is provided by a single 135 amp. alternator driven off the tow vehicle's engine. The following information is designed to familiarize the operator with the 1295's electrical system components located inside the tow vehicle's cab.
  • Page 16 INTRODUCTION 1.5.1 CONTROL CONSOLE AC Power On/Off Switch Turns power ON and OFF for the 1295's power inverter supplies 120 Volt AC power for the portable PC and printer. DC Power On/Off Switch Turns 12 Volt DC battery power ON and OFF for the 1295's solid state logic, meters, and switching functions within the main console.

  • Page 17: Control Console 4

    IMPORTANT If the compressor light comes on during a test, that indicates there is inadequate pressure to conduct the test, and a test fault may occur. Figure 1-3. Laptop PC and Control Console Dynatest 1295 Version 1.07 Sep 2017...

  • Page 18: Portable Computer

    The computer operating system is Windows 7 or 10 that includes option to down grade to Windows 7.  The 1295 Windows software is used for friction testing and data analysis 1.5.3 EMBEDDED DATA ACQUISITION SYSTEM The data acquisition system is equipped with:: ...

  • Page 19: Tow Vehicle Rear Bed Components

    The following information is designed to help the operator identify the electrical and mechanical components located in the rear bed of the tow vehicle (see Figure 1-4). Figure 1-4. Tow Vehicle Rear Bed Components Dynatest 1295 Version 1.07 Sep 2017...

  • Page 20: 250/300 Gallon Baffled Water Tank

    The tank is filled through the screw-on cap located on top of the tank. Optional larger tank systems available. 1.6.2 12 VOLT DC BATTERY Operates the 1295's 12 Volt DC electronics. This battery is isolated from the tow vehicle's 12 Volt DC battery during shut-down. 1.6.3 POWER INVERTER Supplies 120 Volt AC power to the monitor, computer, printer, and electronic power supplies.

  • Page 21: Tow Vehicle Underside

    NOTE Underneath the tow vehicle are two (2) nine (9) gallon (40 liter) air storage tanks, for the pneumatic system. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 22: Tow Vehicle Rear Bumper

    1.8.2 WATER HOSE QUICK DISCONNECT This feature allows the operator to quickly disconnect the 1.5 inch (3.5mm) diameter water hose(s), for the 1295's self-watering system, from the tow vehicle. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 23: Signal Cable

    Trailer Power Air Connection Water Connection Adjustable Hitch Connector Connector P/N 002318 P/N 002323 P/N 016420 P/N 001715 P/N 001714 Trailer Jack Safety Chains P/N 002631 Figure 1-6. Tow Vehicle / Trailer Hookup Illustration. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 24: Two Wheel Trailer Components

    Trailer Signal Trailer Power Air Connection Water Connection Adjustable Hitch Connector Connector P/N 002318 P/N 002323 P/N 016420 P/N 001715 P/N 001714 Trailer Jack Safety Chains P/N 002631 Figure 1-7. Two Wheel Trailer and Components Dynatest 1295 Version 1.07 Sep 2017...

  • Page 25: Single/Dual Model 1270 Two-Axis Force Transducer(S)

    FN(t) in real time. 1.9.2 DIGITAL ENCODERS There are two (2) encoders on the 1295. They are mounted on the axle assembly by both test tires. These encoders provide accurate distance and tow vehicle velocity pulses, as well as instantaneous locked wheel velocities.

  • Page 26: Electric Lift Jacks

    Flashers On Switch on the Main Console. 1.9.10. AIR SHOCKS The axle is suspended on air shocks. For proper operation the shocks should be inflated to 50 PSI (344 kPa). This will also be necessary to keep the trailer level. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 27: Calibration

    There are five (5) calibration pages which are listed below. To access any of the calibration pages press the calibration tab of interest with the mouse Force Transducer Distance and Velocity Temperature Flow and Level Meters and DAC Dynatest 1295 Version 1.07 Sep 2017...

  • Page 28: Force Transducer Calibration

    Wait for the computer to calculate the gain and offset trim values. View the corrected calibration force values by selecting the view / calibrated selection. The traction and load offset meters should read close to zero. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 29: Editing The Transducer Platform Calibration Values

    To change the force transducer platform calibration values it is necessary to press the ‘Edit’ button with the mouse. The calibration values are saved by pressing ‘Save’ button with the mouse . NOTE: Dynatest has supplied the customer with a copy of the master platform calibration values for the two-axis force transducer(s) when the 1295 was shipped.

  • Page 30: How Often Should The Force Transducer(S) Be Calibrated

    The daily calibration must be performed each time the operator starts up the 1295 friction testing software. You cannot perform a friction test unless the operator has performed a daily calibration.

  • Page 31: Traction Gain

    NOTE: It is very important that the proper traction gain, load gain and trailer weight calibration values have entered into the system. If these calibration values are not correct the system calibration will be in error. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 32: Distance And Velocity Calibration

    (The vehicle must be moving at all times during the calibration, do not stop ) Note: The system will now calculate the distance and velocity calibration value. 4) Press the ‘Save’ button with the mouse. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 33: How To Manually Enter A Distance & Speed Calibration Value

    When the operator pendant is pressed at the start of the measured distance test section the computer then begins to count the pulses. When the operator pendant is pressed at the end of the measured test section the computer stops counting the pulses. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 34: Description Of The Distance Calibration Fields

    2.3.6.5 Calibration Status Box This display line is used to guide the operator through the distance calibration process. Follow the instructions given on this line to perform the distance calibration. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 35: Calibration Button

    This field displays the measured time value used for generating the timing parameters for the calculation of the left wheel speed or vehicle speed. The time value is measure for the duration of each encoder pulse. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 36: Right Timer Count

    This field displays the calculated wheel speed. The right wheel speed units are miles per hour or kilometers per hour. 2.3.6.20 Vehicle Speed This field displays the calculated wheel speed. The vehicle speed units are miles per hour or kilometers per hour. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 37: Temperature Sensor Calibration

    2.4.1.1 Air Temperature The air temperature sensor values are displayed in voltage and Fahrenheit or Celsius degree units. 2.4.1.1.1 Gain The air temperature gain calibration value has units of (Fahrenheit degree/volt) (Celsius degree/volt) Dynatest 1295 Version 1.07 Sep 2017...

  • Page 38: Offset

    The tire temperature sensor values are displayed in voltage and Fahrenheit or Celsius degree units. 2.4.1.3.1 Gain The tire temperature gain calibration value has units of Fahrenheit degree/volt) or (Celsius degree/volt) 2.4.1.3.2 Offset The tire temperature offset calibration value has units of (Fahrenheit degrees) or (Celsius degrees) Dynatest 1295 Version 1.07 Sep 2017...

  • Page 39: Flow And Level Sensor Calibration

    2.5.1.2 Flow Meter 2 The flow meter 2 values are displayed in voltage and flow rate units of gallons per minute or liters per minute. The flow meter calibration values are described below. 2.5.1.2.1 Gain Dynatest 1295 Version 1.07 Sep 2017...

  • Page 40: Offset

    The water tank sensor calibration values are described below. 2.5.1.3.1 Gain The volume gain calibration value has units of (gallons/volt) or (liters/volt) 2.5.1.3.2 Offset The water tank sensor offset calibration value has units of (gallons) or (liters) Dynatest 1295 Version 1.07 Sep 2017...

  • Page 41: How To Use The Meter And Dac Calibration

    ‘Offset’ fields for each meter. To change values it is necessary to press the ‘Edit’ button by using the mouse. The entered calibration values are saved by pressing the ‘Save’ button by using the mouse. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 42: Meter Dac Field Descriptions

    The Right load DAC controls the trailer load display meter. 2.6.2.3.1 Gain The right load DAC gain calibration value has units of (lbs/volt) or (kgs/volt) 2.6.2.3.2 Offset The right load DAC offset calibration value has units of (lbs/volt) or (kgs/volt) Dynatest 1295 Version 1.07 Sep 2017...

  • Page 43: Initial Setup Of The Tow Vehicle And Trailer

    INITIAL SETUP OF THE TOW VEHICLE AND TRAILER The following information is designed to familiarize the operator with the initial setup procedures on the 1295 before a test run. Position the tow vehicle and two wheel trailer on a level section of pavement.

  • Page 44: Initial Setup Of The Computer For Testing

    If you experience Ethernet connection errors, exit the Windows testing software and cycle the AC and DC power on the embedded control console and wait until it flashes before entering the Windows friction testing software. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 45: General Software Organization

    3.3 General Software Organization Figure 3-1: Main Menu The 1295 Pavement Friction Tester is an automated skid measurement device. The measurement system has been designed to automate the task of making skid friction measurements. The system utilizes a high speed data acquisition system connected to a portable computer by an Ethernet connection.
  • Page 46 Pre-defined test setups using the settings to allow fast switching for data collection without changing settings. Help Each software page has a help button that will give specific help information to assist the operator Dynatest 1295 Version 1.07 Sep 2017...

  • Page 47: Software Setup Process Outline

    Step 4: Calibrate the force transducer(s) Step 5: Check the distance calibration values to make sure they are correct. Step 6: Check the flow and related sensor calibration values and make sure they are correct. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 48: Test Information Menu

    ‘ON’. If a text line is disabled (turned off) the information will not be printed or stored for that line. Each of the templates can be modified to meet the user’s needs. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 49: Editing Information

    The default template loads a set of pre-defined field titles. To load the default template click on the ‘default template’ in the left side list. 4.1.3 Recalling a Stored Title Template To recall a stored template click on the name of the template. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 50: Settings

    SECTION 4 OPERATION 4.2 Settings Figure 4-2a: Control Parameters Dynatest 1295 Version 1.07 Sep 2017...

  • Page 51: Control Parameter Overview

    The ‘Test Suspension Speed’ is the speed at which the test will be terminated if the test speed is below the Target Speed and Range parameters. 4.2.1.2 Test Cycle Sequence The ‘Test Cycle Sequence’ defines the cycle sequence used for test measurement. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 52: Manual

    This selection allows systems with two wheel path measurement capability to alternate testing between the right and left wheel paths, starting the sequence in the right wheel path. 4.2.1.4 Test Start Dynatest 1295 Version 1.07 Sep 2017...

  • Page 53: Start Test By Pendant At Dmi Start

    The ‘Test Stop’ selections define how the test will be stopped. 4.2.1.5.1 Pendant The test will be terminated by the operator pushing the pendant. 4.2.1.5.2 Distance During testing, once the distance reaches the entered value the sequence will stop. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 54: Test Time Parameters

    This selection allows the choice of Feet or Miles, or Meters or Kilometers depending on the System Units being used. 4.2.1.7.2 DMI Starting Distance (Ft) This selection specifies the starting point for the DMI. 4.2.1.7.3 DMI Up or Down This selection specifies that the DMI will count up or down. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 55: Miscellaneous

    The ‘Pre-Wet’ selection is to be used when water is to applied to the measurement surface by a watering source other than the on board water delivery system. 4.2.1.10 Data Averaga Filter The ‘Data Average Filter’ selections determine how the raw test data will be filtered. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 56: Display Settings

    The ‘Air Compressor Option’ selection defines if the air compressor is on or off during testing. NOTE: for close spacing between tests compressor should be left on. 4.2.1.13 GPS Settings 4.2.1.13.1 GPS Bearing Minimum Update Travel Distance Dynatest 1295 Version 1.07 Sep 2017...

  • Page 57: Gps Coordinate Display

    SN Right  PBC Left  PBC Right  TTP Left (Time to Peak)  TTP Right  The final selection must be checked if the changes are to be used. Click checkbox for Yes. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 58: Trend Graph Description

    IMPORTANT: The trend chart settings are divided into two main setting groups. The ‘SN Interval’ group and the ‘Locking Interval’ group. It is important to understand the definition of each group to make sure the values are interpreted correctly. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 59: Trend Chart Field Definitions

    4.3.2.1.5 Y-Scale Min (Mu x 100) Y-graph minimum traction force scale force units in used for the manual scale selection 4.3.2.1.6 Y-Scale Max (Mu x 100) Y-graph maximum scale force units in used for manual scale selection Dynatest 1295 Version 1.07 Sep 2017...

  • Page 60: Sn Interval – Traction Force Trend Chart

    4.3.2.3 SN Interval – Load Force Trend Chart 4.3.2.3.1 Load Force Avg The average load force value obtained during the ‘SN measurement period’ 4.3.2.3.2 Load Force Maximum The maximum load force value obtained during the ‘SN measurement period’ Dynatest 1295 Version 1.07 Sep 2017...

  • Page 61: Load Force Min

    4.3.2.4.4 Y-Scale Min (mph or kph) Y-graph minimum scale speed units in used for the manual scale selection. 4.3.2.4.5 Y-Scale Max (mph or kph) Y-graph maximum scale speed units in used for the manual scale selection. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 62: X-Scale

    This selection will turn ‘ON’ auto scaling for the Y-scale The selection can be changed by using the mouse. 4.3.2.5.8 Manual Y-Scale This selection will turn ‘ON’ manual scaling for the Y-scale The selection can be changed by using the mouse. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 63: Sn Interval – Standard Deviation Trend Chart

    This selection will turn ‘ON’ auto scaling for the Y-scale The selection can be changed by using the mouse. 4.3.2.6.10 Manual Y-Scale This selection will turn ‘ON’ manual scaling for the Y-scale The selection can be changed by using the mouse. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 64: Locking Interval – Friction Trend Chart

    Peak traction force value measured during the wheel locking period. 4.3.2.8.2 Traction Force Maximum Maximum traction force value measured during the wheel locking period. 4.3.2.8.3 Traction Force Minimum Minimum traction force value measured during the wheel locking period. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 65: Y-Scale Min

    The peak load force measured during the wheel locking period. 4.3.2.9.5 Y-Scale Min (lbs or kgs) Minimum Y-graph scale units of load force samples. 4.3.2.9.6 Y-Scale Max (lbs or kgs) Maximum Y-graph scale units of load force samples. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 66: Locking Interval – Speed Trend Chart

    4.3.2.10.6 Y-Scale Min (mph or kph) Minimum Y-graph scale units of vehicle speed. 4.3.2.10.7 Y-Scale Max (mph or kph) Maximum Y-graph scale units of vehicle speed. 4.3.2.10.8 X-Scale (samples) X-graph scale units of vehicle speed samples. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 67: Locking Interval – Flow Rate Trend Chart

    This selection will turn ‘ON’ auto scaling for the Y-scale The selection can be changed by using the mouse. 4.3.2.11.9 Manual Y-Scale This selection will turn ‘ON’ manual scaling for the Y-scale The selection can be changed by using the mouse. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 68: Locking Interval – Misc. Trend Chart

    This selection will turn ‘ON’ auto scaling for the Y-scale The selection can be changed by using the mouse. 4.3.2.12.8 Manual Y-Scale This selection will turn ‘ON’ manual scaling for the Y-scale The selection can be changed by using the mouse. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 69: Installed Hardware Field Descriptions

    Installed Hardware Field Description The installed physical hardware setup page is used to define the specific hardware that has been installed in your 1295 pavement friction tester. IMPORTANT: It is very important for the operation of your system that only items that are installed in your system be selected.

  • Page 70: Force Transducers

    4.4.4.3 Right Wheel This item is selected when an encoder is installed on the right side of the system. 4.4.4.4 Vehicle This item is selected when a NiteStar encoder is installed on the vehicle system. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 71: Pendant

    4.4.7 Additional Equipment This option defines additional device(s) that are installed on the system. 4.4.7.1 Printer This item is selected when a printer is installed on the system. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 72: Inclinometer

    4.4.7.6 Accelerometer (future addition) This item is selected when a accelerometer sensor is installed on the system. 4.4.7.7 Texture Sensor (future addition) This item is selected when a texture laser is installed on the system. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 73: Storage And Printing Field Descriptions

    4.5.2 File Name This is the file name that the friction data will be stored in. Note: Do not include the file extension as part of the name. Dynatest files automatically have the extension assigned. Example: 1 File Management Details File Name:...

  • Page 74: File Directory

    The raw data stored includes, but not limited to, the following: 1) Traction Force 2) Load Force 3) Vehicle Speed 4) Locked Wheel Speed 5) Flow Rate 4.6 Miscellaneous 4.6.1 Test Printing This selection turns test printing ‘ON’ Dynatest 1295 Version 1.07 Sep 2017...

  • Page 75: Print Disk Files

    The ‘Clear List’ button clears the selected files from the printing cue. The ‘Remove Selected’ button allows the user to remove a file from the selected list of files. The ‘Print’ button allows the list of files to be printed. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 76: F Key Events

    These can be changed as desired. During data collection when the F1 key is pressed, the words “Bridge Joint”, as shown in the above example, are stored with the GPS coordinates in the summary data file. This does not interrupt the data collection. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 77: Sn Correction

     Equation Selection Method – The user may choose automatic which chooses the equation for the appropriate test speed. The option is to choose manual and choose which of the three equations available are used for the correction. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 78: Diagnostics

    The graph to the right of the dt meters is a dt sample based strip chart showing the dt values of the left, right and vehicle dt count values. If a problem exists with the dt measurement of the left, right or vehicle dt the corresponding speed calculation for that particular channel will be erroneous. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 79: Speed Meters

    1) when the right wheel is locked the right encoder is used for measurement of locking wheel speed 2) when the left wheel is locked the right encoder is used for the measurement of vehicle speed NOTE: a vehicle mounted encoder is not required Dynatest 1295 Version 1.07 Sep 2017...
  • Page 80 If the dt value looks correct but the encoder is not accumulating then the problem is with the encoder counter. The encoder timer and counter reside on one PC-104 counter timer board. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 81: Analog I/O

    The measurement system uses a 16 channel 16 bit analog to digital converter. The measurement system uses a four channel 12 bit digital to analog converter Dynatest 1295 Version 1.07 Sep 2017...

  • Page 82: Trace Select

    NOTE: Controls that are ‘grayed out’ represent hardware that has not been selected in the hardware settings section as being installed on your 1295 system. Dynatest 1295 Version 1.07...

  • Page 83: Digital I/O

    The signals are described below: 4.11.2 Digital Inputs : Port 1, Port 2, Port 3 The system uses 24 digital inputs for monitoring system status signals and switched inputs. The digital input channels are assigned below: Dynatest 1295 Version 1.07 Sep 2017...

  • Page 84: Digital Outputs:port1,Port2

    Port 1 Channel 1: Calibration resistor control Channel 2: Oscillator control Channel 3: Tank 1 Channel 4: Spare Channel 5: Spare Channel 6: Tank 2 Channel 7: Trailer Lock pin Channel 8: Blinking LED Dynatest 1295 Version 1.07 Sep 2017...
  • Page 85 Right water clutch control Channel 3: Water nozzle control Channel 4: Left brake control Channel 5: Right brake control Channel 6: Safety brake control Channel 7: Left Pump control Channel 8: Right Pump control Dynatest 1295 Version 1.07 Sep 2017...

  • Page 86: Testing

    Test Type – This drop down list allows the user to switch between the Standard Test (SN) and the PBC Test (Peak Braking Coefficient)  Surface – This drop down list allows the user to select between Dry, Wet (using on board water) and Pre-Wet (using pre wet pavement) Dynatest 1295 Version 1.07 Sep 2017...

  • Page 87: Sn Average

    This value is the standard deviation of SN calculated during the SN period 4.12.2.5 Trac Avg The average traction value measured during the SN period 4.12.2.6 Trac Max The maximum traction value measured during the SN period 4.12.2.7 Trac Min Dynatest 1295 Version 1.07 Sep 2017...

  • Page 88: Traction Standard Deviation

    The % slip is measured at the PSN value 4.12.2.18 TTL The time to lockup is the time in seconds measured from the start of the brake actuation to the time to brake lockup. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 89: Setups

    Note: If you have not performed a save operation at least once before performing a load operation, then No variables will be loaded. “S> Save” – This button is used to save the current system variable settings into the selected “Setup File” for later recall by use of the load button. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 90: Troubleshooting

    SECTION 5 TROUBLESHOOTING TROUBLESHOOTING The following information is designed to lead the operator through a quick remedy for certain 1295 software, electrical, and mechanical problems which may arise during operation. Troubleshooting the Software Refer to Table 5-1 for the Software Troubleshooting information.
  • Page 91 1. Turn printer on line. 2. Printer cable disconnected from 2. Reconnect printer cable. Laptop. 3. Printer cable disconnected from 3. Reconnect printer cable. printer. 4. Printer has failed. 4. Repair or replace printer. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 92: Rebooting The 1295 Operating Software

    SECTION 5 TROUBLESHOOTING 5.2.1 REBOOTING THE 1295 OPERATING SOFTWARE The following information is designed to help the operator reboot the 1295's operating software program if it is lost from hard disk. Place the 1295 operating software program CD into CD drive.

  • Page 93: Preventative Maintenance

    (If Color is Pink) Air System Filter Clean Out or Replace Filters As Required Air Storage Tanks Drain Condensation From Tanks By 2 Weeks the ¼ inch Pipe Plugs Air Compressor Dust or Replace Filters As Required Dynatest 1295 Version 1.07 Sep 2017...

  • Page 94: Service Schedule (Trailer)

    Grease the 2 fittings On Each Sway Each Month Wheel Bearings Replace 10,000 Miles and/or Annually Water Solenoid Valves (If Equipped) Clean Out 6 Months Pneumatic Lubricator Fill with 10 weight Non-detergent Oil Weekly Dynatest 1295 Version 1.07 Sep 2017...

  • Page 95: Replacing The Trailer Wheel Bearings

    Proper assembly and disassembly of the trailer wheel spindles to replace the tapered wheel bearings require special tools, shims, and assembly procedures. These spindles are modified General Motors Corporation Corvette spindles, and Dynatest recommends that the spindles be removed and taken to an authorized General Motors Dealer for service.
  • Page 96 Support the spindle by the pilot diameter, NOT the wheel studs. Install the spacer over the spindle (flare side down) and slide on the shim that was selected to obtain the .001 inch to .006 inch end play. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 97: Measure Wheel Bearing Endplay

    You are now ready to continue testing. Lower the trailer to the ground. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 98: Brake Bleeding Procedure (Trailer)

    The trailer is equipped with an air over hydraulic brake system. All the brake system components are located underneath the cover on the trailer. There are two modes of brake actuation on the two wheel trailer. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 99: Safety Brakes

    The hydraulic pressure gauges, mounted on both brake master cylinders, should read between 200-250 psi (1379-1724 kPa) when the air pressure gauge reads 7 to 10 psi (50-69 kPa) Turn on the SAFETY BRAKE sub-menu. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 100: Test Brake(S)

    1000 psi of hydraulic pressure. Turn the air regulator knob until the hydraulic pressure is 1000 psi (6895 kPa). Push the knob on the air regulator in to lock the knob in the adjusted position. Turn ‘ON’ LEFT BRAKE digital I/O line. Dynatest 1295 Version 1.07 Sep 2017...

  • Page 101: Aligning The Water Pump Gearbox With The Drive Shaft

    I/O line 6.3.5 ALIGNING THE WATER PUMP WITH THE DRIVE SHAFT (1295) This information is designed to lead the operator through the correct procedure for aligning the gear pulleys on the vehicle's drive shaft with the gear pulleys on the water pump gearbox and the belt idler.

  • Page 102: Adjusting The Electric Clutch (Water Pump)

    Tighten all four bolts which hold the water pump onto the cross arms. Repeat steps 1 through 4 above to adjust the tension of the other gear belt for the belt idler. 6.3.7 THE ELECTRIC CLUTCH (DOES NOT REQUIRE ADJUSTMENT) Dynatest 1295 Version 1.07 Sep 2017...

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