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Dynatest 6875H Highway Slip Friction Tester
   

The Dynatest 6875H Highway Slip Friction Tester is an accurate and repeatable, self contained measuring device that provides continuous dry (or self-wetted) coefficients of slip friction on highway pavements.

It is designed for maintenance testing to evaluate surface friction deterioration due to weathering, high usage, aging, and contaminants.

It can be used in difficult test areas, such as bridge decks, off-ramps, city streets, and intersections, giving an accurate continuous friction trace for the entire area being tested.

  
   
 
  Advantages:      
  The 6875H is a fully instrumented front wheel drive minivan.

It uses a Dynatest Two Axis Force Transducer mounted on a retractable fifth wheel assembly.

This assembly provides dynamic vertical load and horizontal tractive force measurement.

The 6875H meets the requirements of the pending ASTM standard for continuous fixed slip friction measurement

 


The fifth wheel assembly is driven at 14% slip.

 
 

 

Assembly:

  

 

  
 
  • ASTM E1551 standard test tire
  • Steel gear chain/electric clutch drive system
  • Heavy duty shock absorbers
  • Hydraulic raise/lower system
  • Dynatest Two Axis Force Transducer
  • ASTM E274-97 type laminar flow water nozzle
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Retractable fifth wheel assembly. 		 
   

Specifications:

  

Optional features:

  
 

  • Test Principal:
    Continuous Slip Friction Testing

  • Fifth Wheel:
    Dynatest Design

    •
  GPS, Laser sensors for profile or texture data collection.

 

  
         
 

 

System electronics include laptop computer colour graphics printer.

User-friendly Windows software allows the operator to enter test speed, printer scale, test type (manual or automatic), and to annotate pavement test conditions for later reference.

The friction values, along with, vehicle speed and water flow rate data are stored and can be printed out.

 

  
         
         
  The system includes a 250 U.S. gallon (1000 litre) self watering tank, positive displacement water pump and laminar flow water nozzle to simulate wet pavement testing for up to 72.000+ ft. (22.000+m) of pavement without refilling at a water film thickness of 0.02 in (0.5mm).  
Photo: Dennis Rusher		  
 
 		  
 		  
 

6875 Operation Manual (2.7 Mb, .pdf format)

Adobe Acrobat Reader Required -
available from www.adobe.com

  

6810 Streaming Video for Windows® Media Player (493 Kb .wmv File)

6810 SureStream Video for RealPlayer G2® (1.75 mb .rm File)

  
         
 

 

 

Click here for Dynatest
Equipment Service and Support Departments

  

Read the specifications on the new
 6875H Highway Slip Friction Tester:
 6875 specifications.pdf. (78kB)

Download brochures in PDF format for printing.
 6875H Highway Friction Tester.pdf (115 Kb)

  
 

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  For further product information: Please mail to: EquipmentSales@dynatest.com  
     

Dynatest International
Rev. 03102006-12