Basic Calibration Instructions - SCI WLS350 Series Installation And Operating Instructions Manual

4. Basic Calibration Instructions

The calibration instructions below are given based on a typical installation.
This system can be used in a large variety of applications, and changing the parameters that
are set will greatly affect the performance of this scale.
1. Ensure you have an accurate test weight of approx. 1/3 – ½ of the machine capacity. The
more accurate the test weight, the more accurate the scale. The test weight must fill the
bucket like the material you will be weighing. Any protrusion of the test weight past the
buckets cutting edge will greatly reduce accuracy.
2. Start the forklift or loader, and the WLS430 should also turn on. The indicator should
power up and go through a short power up cycle. Once the power up cycle finishes, the
indicator will show a random reading. To ensure you have the hydraulic pressure
transducer fitted correctly, raising of the forks or bucket should result in the Current PSI on
the Settings screen to rise.
3. Press the settings button (GEAR) on the bottom left-hand corner of the screen to enter the
settings page (Figure 5).
4. Raise the empty Forks or Bucket to your weighing height. (Raise to 1, Lower to 2, Optional
Decal) Allow approx. 2-3 seconds for the weight to settle, press cycle to make "Zero PSI"
highlighted on the screen and press SET to set the Zero Weight Calibration Pressure.
5. Lower boom and place your test weight onto the forks or bucket. Do not lift to weighing
height at this stage. Enter the test weight amount to "KWN WT" by pressing the Cycle
button to highlight the KWN WT value then press Increment or Decrement to increase or
decrease the value to match what is in the bucket.
6. It is now time to pick up the test weight and raise to the weighing height, (Raise to 1,
Lower to 2, Optional Decal). Allow approx. 2-3 seconds for the weight to settle, and then
press Cycle to highlight the KWN PSI value and then press SET to set the value.
7. Exit the settings page and check the "Displayed Weight" value to see if the weight displays
the test weight amount. If not, you may need to repeat the calibration process.
8. Validate a lighter known load reads correctly. If correct, calibration is complete.
Perform as many test weighing until you are satisfied the system is working correctly.
If at any time the indicator indicates an error message during the calibration process, call tech
support for assistance. Before calling check that the hydraulics have been installed into the
correct 'Piston / Ram' circuit of the machine, and also check that your test weight is at least 1/3 -
½ machine capacity.
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WLS350 Series Load Weighing System Manual
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