Many assume that the output from a load cell is huge; however, it actually isn’t. However, if there is any interference – even the tiniest bit – it will show up and can cause problems. So, it is important that you know how to find faults in your load cells as well as the load cell components, such as the cabling and the signal conditioner. Here are just a few tips:
- Look at the Color Coding of the Wire Connections – Your first step should always be to look at the color coding of the wiring connections between the signal conditioner and the load cell. You will need the calibration certificate from the load cell, as the colors vary from one manufacturer to the next. These colors are crucial in ensuring you get accurate results from the load cell.
- Check for Overloading of the Load Cell – Sometimes the load cell can become overloaded. In some cases, this can happen from leaning on it, which can result in permanent deformation and a non-zero reading with no load.
- Make Sure the Cable’s Connected to the Ground at a Single Point – To ensure that a ground loop is not created, it is crucial that the screen is only grounded at one point. Otherwise, there will be issues with audio and instrumentation systems.
- Inspect the Excitation Voltage from the Signal Conditioner – You need to measure the amount of excitation voltage when the load cell is not connected to ensure that it is accurate. A lower voltage will provide a smaller reading and still work properly; however, a higher voltage can result in the load cell overheating.
As you can see, there are many ways in which you can see if your load cell is having problems – and there are only a few of them. If you’re unsure whether your load cell is working properly or you need load cell repair, get in touch with us at Measurement Specialists.