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| Illustration 1 | g00747738 |
The sensor is bonded to the frame of the machine. The sensor is a strain sensor. This type of sensor is often called a strain gauge. This type of strain sensor measures the change in electrical resistance that results from the amount of strain (stretch) that is applied to the wires in the sensor. As the electrical resistance changes, a change in voltage is measured by the display module. As more strain is applied to the sensor, a greater change in voltage is measured by the display module.
The change in voltage that is measured by the display module depends on the amount of strain that is applied to the sensor. Factors that affect the amount of strain that is applied to the sensor are listed below.
- The weight of the load that is carried on the work tool
- The amount of boom extension
- The angle of the boom
The amount of electrical current that passes through the sensor is measured by the display unit.
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| Illustration 2 | g00749444 |
The connector must be viewed from below the machine. | |
The sensor has four wires that are connected to the display unit via an electrical connector. The colors of the wires that are attached to the sensor do not match the colors of the wires that are connected to the display unit.
- The red wire that is connected to the sensor connects to the brown wire that is connected to the display unit.
- The blue wire that is connected to the sensor connects to the purple wire that is connected to the display unit.
- The green wire that is connected to the sensor connects to the white wire that is connected to the display unit.
- The yellow wire that is connected to the sensor connects to the black wire that is connected to the display unit.