General Details

Wheel Loader Scale

Wheel Loader Scale is a dynamic weighing and auto-totalizing equipment installed on wheel loader.

When the lift-arm of wheel loader lifted to a certain height, the position sensor will trigger the weighing process, and the weighing indicator will collect the oil pressure signal from lower and upper oil chambers of arm-lifting oil cylinder.

After signal processing and compensating, Single-bucket-loading -weight will be got and totalized to Totalized Loading Weight automatically.

The operator can judge if the present Single-bucket-loading-weight is valid according to the alarm messages, and confirm the last bucket’s loading weight according to the negative deviation value.

Main Features

1.EMC design with high anti-jam for industrial environment.

2.DC24V power input with reverse polarity protection.

3.32-bit ARM CPU with 72MHz & higher arithmetic speed.

4.Dust-proof stainless steel shell with protection level IP65.

5.640×480 TFT display screen with English display and input.

6.24-bit ∑-△ADC with internal resolution 1/1,000,000.

7.High sampling frequency 400Hz.

8.Special Anti-vibration Digital Filtering Algorithm for precise weighing, stable display and rapid response.

9.Special Acceleration Compensation Algorithm.

10.10000 Loading Records can be saved.

11.Each record can contain 50 Single-bucket-loading-weight.

System Accuracy

Accuracy Grade: III.

Verification Accuracy of Weighing Indicator: 0.02%.

Accuracy of Single-Bucket-Weight: 0.5%~1.0%.

Accuracy of Totalized Loading Weight: 1.0%.

System Configuration

1 Weighing indicator with thermal printer.

1 Position sensor.

2 Oil pressure sensors.

2 Plate type three-way joints.

1 Mounting fitting.

Wheel Loader Scale Set

Wheel Loader Repeatability

Technical info

Specifications of Weighing Indicator

  • Executing Standard
  • OIML R76: 2006《Non-automatic Weighing Instruments》International Recommendation.
  • Display

  • 640×480 TFT color display screen for English character display.
  • Weight Display Range of Indicator: -99,999~99,999.
  • System Weighing Range: 100~12,000kg.
  • Scale Division: Optional 1, 2, 5, 10, 20, 50kg.
  • Display Resolution: 1/100,000.
  • Scale Unit: Fixed kg.
  • Weight Unit: Optional kg, t.
  • Ton Decimal Point: Optional 0, 0.0, 0.00, 0.000.
  • Display Refreshing Time: Setting Range1~2.0s.
  • Keypad

  • 20-key English keypad with controllable backlight.
  • Menu&Shortcut mode operation with key tone.
  • Number and English Alphabet can be inputted.
  • Position Sensor Input Interface

  • 2 Switch signal Input.
  • Output Voltage: DC12V.
  • Output Current: 100mA.
  • Oil Pressure Sensor Interface

  • Excitation Voltage/Max.Current: DC12V/100mA & DC5V/100mA.
  • 2 Oil Pressure signal inputs.
  • Signal Input Range: Optional 0~20mV, 0~5V[Factory Set Value].
  • ∑-△ADC: 24-bit, 1,000,000 internal code used.
  • Sampling Frequency: 400Hz.
  • Special anti-vibration digital filtering algorithm.
  • Zero Drift: ±0.1μV/℃ RTI (Relative to Input).
  • Gain Drift: ±5ppm/℃.
  • Non-linearity: 0.005%FS.
  • Digital Communication Interface

  • COM1: RS232.
  • Internal COM2: Optional wireless serial communication module.
  • Internal COM3: Connected Thermal Serial Printer, Baud Rate 9600bps, No Parity Check Bit.
  • Report Print

  • 10000 Loading Records can be saved, queried and printed, and each record can contain 50pcs Single-bucket-loading-weight value.
  • Operating Specification

  • Operating Voltage: DC24V±20%.
  • Power Consumption: 10W.
  • Outline Size: 168×213×50mm [W×H×D].
  • Operating Temperature: -25℃ to +45℃.
  • Storage Temperature: -30℃ to +60℃.
  • Relative Humidity: Max. 85%RH.
  • Protection Level: IP65.
  • Weight: Approx. 0kg.

Specifications of Position Sensor

  • HALL Type Proximity Switches
  • Operating Voltage: DC5~24V.
  • Detecting Distance: 1~8mm.
  • Response Frequency: 5KHz.
  • Quiescent Current: 2mA.
  • Thread Size: M8×1mm.
  • Service Temperature: -25℃~+70℃.
  • Protection Level: IP67.
  • Standard Detecting Target
  • Permanent magnet.
  • Outline Size: 30×10×5mm [L×W×T].

   Specifications of Oil Pressure Sensor

  • Operating Voltage: DC5V.
  • Capacity: 0~25MPa.
  • Accuracy: ±0.1%FS.
  • Output Sensitivity: 2mV/V.
  • Zero Drift: ±0.015%FS/℃.
  • Safe Overload: 120%FS.
  • Thread Size: M10×1mm.
  • Service Temperature: -40℃~+125℃.
  • Protection Level: IP67.
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