IVDT SkidWeigh SC1 Use and care manual

SkidWeigh Classic
Lift Truck Onboard Check Weighing Scale With Overload Alert
SC
Integrated Visual Data Technology Inc., 3439 Whilabout Terrace, Oakville, Ontario, Canada L6L 0A7
Installation, Calibration & Operator Usage Guide

General Installation Guide
This SC1 / SC2 SkidWeigh Classic system installation & calibration guide describes how to install, calibrate, test and
use your lift truck onboard load weighing system. Following the instructions in this guide will enable you to get your
system operating quickly and easily. In the event that you require additional assistance, please contact customer
support via e-mail at [email protected], visit www.skidweigh.com or contact us at the address or contact
number below:
Integrated Visual Data Technology Inc.
3439 Whilabout Terrace, Oakville, ON, Canada, L6L 0A7
Phone: [phone]
Safety
Always disconnect the vehicle battery while installing SkidWeigh system or any other electronic product.
Make sure that unit, pressure transducer and any other associated cables are securely mounted and do not impede
any of the vehicle’s controls. Use care when routing the components cables. Route the cables where they will be
protected. Use commonly accepted install practices for after market industrial vehicle electronic devices.
The installation of the SkidWeigh systems should only be performed by an acknowledged lift truck dealer technician
or end user technical installer familiar with material handling vehicles operation.
Here are two acceptable methods of making a wire connections:
* Soldering electrical 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 product is connected directly to the vehicle’s ignition switch, 12 to 55 VDC. There is no on-off switch on the unit.
For vehicles with voltages higher than 55 VDC use voltage convertor ( 36 to 160 VDC, Part No. VC-160)
Electro-Magnetic Compatibility
CE conformity to EC directive 89/336 (EMC) by application of harmonized standards: Interference stability EN
61000-6-2 and EN 61326-1 interference emit EN 61000-6-3, EN 61326-1 for the pressure transducer.
SC1 & SC2 SkidWeigh Classic Series
Our policy is one of continuous improvement and the information in this document is subject to change without notice.
Overview of components
The standard SC1 / SC2 SkidWeigh Classic check weighing system consist of two main components:
* Compact digital indicator with mounting flange with wiring harness cable
* Hydraulic pressure transducer with 3 wires cable
* Installation & calibration manual and operator usage instruction
SkidWeigh Classic operational principal
The SC1 /SC2 SkidWeigh system operational principal is based on the hydraulic pressure transducer mounted in the
vehicle lifting hydraulic circuit between lift control valve and lifting cylinder(s). There is need for external switches,
proximity sensors or specific operational procedure of lifting the forks in order to obtain a proper load weight readout.
Integrated Visual Data Technology Inc., 3439 Whilabout Terrace, Oakville, Ontario, Canada L6L 0A7

SkidWeigh “weighing cycle” will be automatically activated every time load is lifted just above the ground. The
increase in pressure is converted in an electronic signal at the sample rate of 16000 readings per session which is
converted into a load weight reading utilizing proprietary software algorithm.
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 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 (single or double mast configuration) or in the body of
the flow divider. In some cases you can drill and tap on “larger elbow” if available in the hydraulic lifting circuit found
in vehicles with larger hoses accommodating 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 flange 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.
Choose the correct location and make sure that:
- Indicator is visible and within reach of the operator
- Location so that operator does not hit a head
Electrical Connections
All SkidWeigh systems operate from 12 to 55 VDC.
(For voltages above 55 VDC order voltage convertor Part No. VC160)
-Orange Wire (+) Ignition switch On position
- Brown Wire (-) Battery negative
- Red Wire, connect to RED wire of the pressure transducer cable
- Black Wire, connect to BLACK wire of the pressure transducer cable
- White Wire, connect to WHITE wire of the pressure transducer cable
Optional Dry Relay Contacts for External Overload Alert (Contact current rating, max. 1A) -
Yellow Wire N.C. - Blue Wire N/O. - Green Wire Common
Integrated Visual Data Technology Inc., 3439 Whilabout Terrace, Oakville, Ontario, Canada L6L 0A7

Electrical power short circuit protection
- All of the SC SkidWeigh systems are internally short circuit protected with resettable fuse. There is no
need to install external inline fuse in orange wire connected to the ignition switch.
- Automotive 60 V load dump protection
-Reversal power supply protection
“Quick test to determine if electrical connections are done right”
Note: This procedure is only to test if electrical connections of the system installation into the vehicle is
done properly.
After you have connected electrical power and pressure transducer cable you can “quickly” check the
system operation.
- Lower the forks to the ground
- Turn On ignition switch
- Digital LED display will be activated, showing software version and serial number
- Number 8 will be shown on LED display above the Mode sign.
- Lift forks with any load just above the ground. Mode number 8will go off for few seconds and some load
weight will be shown on the LED display.
- If the above test is valid then the system electrical connections are done right.
The next procedure will be to calibrate the SkidWeigh weighing function.
Use paper clip to access buttons “M” and “Arrow Up”
-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 +/- 1% of vehicle maximum lifting capacity.
Fully automatic weighing calibration procedure
The SC SkidWeigh calibration is automatic and is done by lifting empty and loaded forks with known calibration load
weight just above the ground. MAKE SURE THAT YOU HAVE A KNOWN LOAD WEIGHT AND KEEP IT NEARBY
TO COMPLETE THE CALIBRATION.
For the best results use at least minimum calibration load test weight of 40 to 60% of maximum lifting capacity of
the lift truck. Use customer floor scale or find a known skid load weight within the operational facility.
Integrated Visual Data Technology Inc., 3439 Whilabout Terrace, Oakville, Ontario, Canada L6L 0A7

-Important
If you want the system to show load weight in pounds, use the known calibration load weight in pounds
during the system calibration and enter that value accordingly. The same would apply if you want the
system to show load weight in kilograms then use the known calibration load weight in kilograms and
enter that value into the system accordingly.
Calibration starting point
Lower the empty forks to the ground. There should be no hydraulic
pressure in lift hydraulic circuit.
- Turn ignition switch to on position and start the engine
- LED display will show software version on the right side and number 8
will be shown in Mode window.
Calibration of empty forks being lifted just
above the ground
To initiate calibration press the “M” key (use a paper clip) and hold it down
for approx. 5 seconds and Mode number 8will change to number 0.
System is ready for automatic zeroing of the scale function
When LED display is showing “0” in Mode digit, lift the
empty forks just above the ground to automatically
calibrate zero value for empty forks being lifted.
Activate the lift control valve as you would do during the
normal lifting operation. Do not attempt to lift the empty forks slowly.
After few seconds, LED display will show “1” in Mode digit and “0” value
in furthest right digit display.
(Instead of 0 value it could be any other number from 0 to 9, depending on
previous calibrated load weight entered into the system)
Automatic zeroing is done!
Note: Next step will be calibration the system by lifting known load weight.
Integrated Visual Data Technology Inc., 3439 Whilabout Terrace, Oakville, Ontario, Canada L6L 0A7

Calibration of loaded forks being lifted just above the ground
Pick up a known load weight and lower the the loaded forks to the ground.
- In our example we will use a known calibration load weight of 4000 pounds
* Button M is used to enter into weighing calibration procedure and shift to the next digit.
*Button Arrow Up is used to input digital value 0 to 9, wrap around.
*
Start entering a known load weight value for each digit by using arrow up button (increments
from 0 to 9 for each digit), wrap around. To move to next digit press “M” button.
- Start with least significant digit. (In our case this is “0”)
- Use “M” button to increment to the next digit on LED display.
- To enter the second digit, press the “M” button and Mode digit will increment to the second.
- Keep pressing “M” button and enter a third, forth and fifth values.
- As the input for known load value has only four digits (4000 in our example), the fifth digits
must be “0”.
Mode
Digit 5
Digit 4
Digit 3
Digit 2
Digit 1
1
0
2
0
3
0
4
4
5
0
Integrated Visual Data Technology Inc., 3439 Whilabout Terrace, Oakville, Ontario, Canada L6L 0A7

-Before going to Mode 6 please make sure that the “Known
load weight” is ready to be lifted.
The loaded forks must be on the ground
(No hydraulic pressure in the lifting hydraulic circuit)
- Press the “M” button to advance to Mode 6 and immediately lift the
“Known load weight” just above the ground.
- LED display will go blank and within few seconds LED display
will show the value of calibrated “Known load weight of 4000”
Lower the load to the ground.
System will go automatically into operational mode.
System is ready to be used.
Mode digit will display number 8.
Note: If system is set up for overload alert the Mode 7 will be shown automatically when loaded forks are
lowered to ground. Follow instruction for overload alert value input.
Weighing calibration function is completed
Lower the loaded forks to the ground.
Integrated Visual Data Technology Inc., 3439 Whilabout Terrace, Oakville, Ontario, Canada L6L 0A7

Overload Alert Value Input
When SkidWeigh system weighing function calibration is completed, loaded forks must be
lowered to ground.
The Mode 7 digit automatically will be shown and will remain on LED display until overload alert
value is inputed into the system. With LED display showing “Mode 7” you have to enter the
overload alert value for that vehicle / application. In our example we will enter the overload alert
value of 4500. Use paper clip to access buttons “M” and “Arrow Up”.Make sure 0 number is
inputed for digit 5. (In our example for overload value of 4500 has only 4 digits)
As soon the last digit is inputed into the system Mode 7 will change to Mode 8 which is the
normal operational mode.
Note: If the lifted load is above preset overload value of 4500 the LCD display will
* Show actual overload value
* LED display showing the overload value will “flash”
* Overload value will stop “flashing” when loaded forks are lowered to the ground
Mode
Digit 5
Digit 4
Digit 3
Digit 2
Digit 1
7
0
7
0
7
5
7
4
7
0
Integrated Visual Data Technology Inc., 3439 Whilabout Terrace, Oakville, Ontario, Canada L6L 0A7

Operator Usage Guide
1.To initiate load weighing cycle you
must lower loaded forks to ground
2. LED Mode digit will show number 8.
System is ready to weigh the load
3. Lift loaded forks just above the
ground and within few seconds LED
display will show weight.
Black Button (Standard with SC2 series)
With LED displaying load weight, press black button to accumulate load. Each time the new
load weight is shown by pressing black button the accumulative load weight total will be
updated. System will also show number of load weights taken.
Green Button (Standard with SC2 series)
With LED display showing the latest accumulative load weight total by pressing green button
system will reset. Another accumulative load weight total function can be initiated.
Overload Alert (Standard with SC1 and SC2 series)
The overload visual alert will be deactivated when load is lowered to the ground.
Integrated Visual Data Technology Inc., 3439 Whilabout Terrace, Oakville, Ontario, Canada L6L 0A7
Activate the lift control valve as you would do during the normal lifting operation.
Do not attempt to lift the empty forks slowly.