The sensor of the automatic quantitative packaging scale is the core component of weighing, which is a relatively precise component. However, replacing the sensor is actually very simple and can be done by oneself. Below are the steps and precautions for replacing sensors.
Overall, replacing the weighing sensor involves three things:
- 1. disassembly and assembly;
- 2. Wiring;
- 3. Parameter debugging
1. Disassembly and assembly
This may be the simplest, but it often leads to installation errors or damage to the sensor due to careless attention to some details. For example, you may encounter the following situations:
Prepare support in advance because once the sensor is removed, the scale will no longer have support. Therefore, prepare in advance and consider the convenience of installing new ones in the future.
When removing the sensor, it may be difficult to remove screws such as rusting or twisting. In this case, cutting, welding, and other methods can be used. After all, if the sensor is damaged, just let it go dry. However, when installing a new sensor, try not to expose it to high temperatures or welding it, as it may damage the sensor. If welding is necessary, protection must be taken and the sensor must not be grounded.
The surface on which the sensor is installed must be flat and clean. When installing the sensor, it must be handled gently and not collided.
Sensors and scales should be relatively flat, without tilting or tilting, to avoid holding back force. When tightening the screws, they should not be tightened at once. After each one is tightened, they should be loosened and tightened again.
After installing the sensor, the wires and air pipes between the scale and the frame should be checked to avoid tension and pressure.
2. Wiring
A weighing sensor usually has a total of 7 wires, including 6 wires and 1 shielded wire. There are also 4 shielded wires with a total of 5 wires, each of which has a different color. If the old sensor and the new sensor are of the same brand and model, take photos of the wiring of the old sensor in advance and connect the new sensor.
Generally, dual sensors can be connected directly by color and together, and the same applies to multiple sensors when using a junction box. If it is a substitute from another brand, the same wire color may represent different wires. It is necessary to refer to the sensor manual and the packaging scale instrument manual for comparison.
3. Parameter debugging
The main step is to calibrate the scale, also known as calibration. The steps for each type of instrument are slightly different. In fact, the overall steps include three: 1. Zero calibration (zero calibration) 2. Weight calibration (gain calibration) 3. Enter the weight of the weight (some entered in advance). I cannot write down the details because the interface for each type of instrument is different. The simplest way is to find the instrument manual and then install the steps to calibrate the scale. After calibrating the scale, you can remove the weights and put them back on to confirm that they have been calibrated.