IVDT SkidWeigh ED2-AT Series Installation & Calibration Download Page 3

Operational principal

The 

ED2-AT Series SkidWeigh

 system operational principal is  based on the hydraulic pressure transducer mounted in 

the  vehicle lifting  hydraulic circuit that will  automatically  activate the  “weighing  cycle / specific algorithm ” every time a 
skid load is lifted just above the ground. The increase in pressure is converted in an electronic signal at the sample rate of 
16000 readings which is converted into a load weight reading.

Pressure transducer installation

The  pressure  transducer  must  be  installed  in  the  lifting  hydraulic  line

 

between  the  lift  control  valve  and  lift 

cylinder(s). 

Mount a T-piece in lifting hydraulic line. In some cases you  can install the pressure transducer  in  the flow 

divider, drilling and tapping for 1/4”-18  NPT male in spare plug (if only single or double mast configuration) or in the body 
of the flow divider.  Also, you can drill and tap on any “larger elbow” that might be available in the hydraulic lifting  circuit 
found in vehicles with larger hoses to accommodate larger vehicle lifting capacities.

Pressure transducer installation precautions 

Before installation of the pressure transducer the hydraulic lift circuit must be pressure free.                                         
There are two ways to do that:                                                                                                                                         
1. Place the forks on the ground in their lowest position and make the hydraulic system pressure free by tilting the mast 
forward. The chain(s) should be slack.                                                                                                                              
2. Lift the forks and position them on the top of a supporting fixture. Start lowering the lifting cylinder into its lowest 
position. Be sure that chain(s) are slack.  

                                                                                                                                       

                     

Make sure that that installed pressure transducer will not touch any moving parts or assembly of the vehicle while in 
normal operation. Pressure transducer has 1/4”-18 NPT male thread. Use thread seal to ensure tight fit.

Selecting the mounting location for digital indicator

Use  the  mounting  bracket with  the  anti vibration  mount and  fasten  digital indicator on  the  vehicle dashboard or side 
railing preferably on the right hand  side. There are many examples of mounting locations that will depend on the vehicle 
model. However, additional mounting items such as a flat brackets may be needed to help secure the unit  to upper right 
corner of the guard or side railing. 

       

Integrated Visual Data Technology Inc.   3439 Whilabout Terrace, Oakville, Ontario, Canada  L6L 0A7  

    

Summary of Contents for SkidWeigh ED2-AT Series

Page 1: ... ED2 AT Series SkidWeigh System Lift Truck On board Check Weighing With Accumulative Load Weight Total ED2 AT Series SkidWeigh V 1 1 Integrated Visual Data Technology Inc 3439 Whilabout Terrace Oakville Ontario Canada L6L 0A7 ...

Page 2: ...ian or end user electro and hydraulic technical installer Here are two acceptable methods of making a wire connections Soldering your connections recommended Crimp connectors with the use of the proper crimping tool Regardless of the method you choose ensure that the connection is mechanically sound and properly insulated Use high quality electrical tape and shrink tubing where necessary This prod...

Page 3: ...ressure transducer installation precautions Before installation of the pressure transducer the hydraulic lift circuit must be pressure free There are two ways to do that 1 Place the forks on the ground in their lowest position and make the hydraulic system pressure free by tilting the mast forward The chain s should be slack 2 Lift the forks and position them on the top of a supporting fixture Sta...

Page 4: ...WHITE wire of the pressure transducer cable Pressure transducer cable Pressure transducer cable must be connected to the digital indicator seven wires single cable White Wire signal 0 to 2 5 V Black Wire signal negative Red Wire power supply to pressure transducer 11 V DC Electrical power short circuit protection All of the SkidWeigh systems are internally short circuit protected with resettable f...

Page 5: ... The next procedure will be to calibrate the SkidWeigh weighing function Lift truck equipped with hydraulic accumulator If the standard SkidWeigh system is installed on the lift trucks equipped with hydraulic accumulators please contact us to provide you with different digital indicator having specific software algorithm to obtain load weight accuracy within 0 1 to 1 of vehicle maximum lifting cap...

Page 6: ...o activate buttons Do not push buttons too hard Left most significant digit represents Mode of operation Other five digits represent the load weight readout Mode LED Digit Five Digits Load Weight Display MODE Digit 5 Digit 4 Digit 3 Digit 2 Digit 1 Note Every time the power is applied the software version will be shown momentarily for a brief moment When forks are lowered to ground LED display wil...

Page 7: ...ox 5 seconds After 5 seconds the Mode display digit will change from number 8 to 0 System is ready for automatic zeroing of the scale function When LED display is showing 0 in Mode digit lift the empty forks or attachment such as longer forks clamp etc just above the ground Note Activate the lift control valve as you would do during the normal lifting operation Do not lift the empty forks slowly W...

Page 8: ...least significant digit of your known load weight Use the M button to increment to next digit on the LED display First least significant digit 0 Second least significant digit 0 Third least significant digit 0 Forth least significant digit 4 Must enter 0 Repeat this procedure until the Mode digit display is showing number 4 Caution In our example a known load weight value of 4000 kg consist only o...

Page 9: ...utomatically advance to the Mode 7 Using the M and Up Arrow keys enter the overload weight value for your application The Mode 7 digit remains throughout this operation On the last shift utilizing M key the Mode 7 digit will turn off The overload weight value will be successfully stored in the system memory Note If the overload input value is as of the example 4850 having only 4 digits make sure t...

Page 10: ...s the load is lifted digital display will go blank for a moment and the load weight will be shown on the LED display Note To initiate the Weighing Cycle the LED indicator must show Mode 8 If LED display shows any other number lower the forks to the ground Always activate lift control valve lever quickly and lift the load weight just above the ground Do not attempt to lift the load slowly Accumulat...

Page 11: ... load weight or current total weight in weighing counter memory will be reset In the case of the system equipped with on board printer the weight ticket will be printed The current load weight will be shown on LED display until next time forks are lowered to the ground Sample of load weight printouts Check weighing accuracy is within 0 1 to 1 of lift truck maximum lifting capacity Overload Warning...

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