Calibration of a Weighing Scale

Generally, weighing scales are present in all the homes. Some of you may have a digital weighing machine while some of you may have an analogue weighing machine. The fact that digital weighing scales are easy to read makes them a popular choice as compared to their counterparts. In any case, one thing stays basic with both the weighing scales and that is calibration. You need to calibrate every weighing scale in order to get the accurate result. So how do you do it? We have answered this by sharing the procedure to calibrate the weighing scale and some more details below.

How to Calibrate an Analogue Weighing Scale
Analogue weighing scales are the easiest to calibrate. You just need to stand directly above the weighing scale and look at the dial. The measuring line should align with 0. If it doesn’t then you need to look for the dial behind the display and you will notice a small calibration dial. Turn it in the required way until the measuring tip lines up with the marking for 0. With this, the analogue weighing machine will be calibrated. Please note that you should see the reading from directly above the machine or else you will end up getting a parallax error.

How to Calibrate a Digital Weighing Scale
Calibrating a Digital Weighing Scale is a lot simpler now. There are some scales which come with auto-calibration option and thus there is no valid reason to adjust those weighing scales. When the weighing machine is turned on, the weighing machine sets itself to 0. After you’re done measuring, the weighing machine calibrates itself every time. So, this practically eliminates the need for calibration.

Now, there are a few machines that need your assistance in calibration. Let us take a look at the calibration technique for machines that need them.

  • You can start the preparations by turning on the machine and warming it up. Also, have an object of a definite weight ready for you. You can even have a measuring weight ready for your calibration purpose.
  • In this step, you need to enter the calibration mode. You will notice a button for Cal or Mode on the scale. You need to press the button. For some machines, it may be required to press the button for a little longer to enter the calibration mode. Once you enter into the calibration mode, you will notice that the screen turns to 0. This initiates the calibration mode.
  • Next, you need to put weight on the machine to see if it really needs calibration. To go ahead, put down the weight of around 15 Kg on the scale. You need to ensure that the weight is placed on the centre part of the machine and that it doesn’t wobble. This is a very important step and you need to ensure that the object weights exactly as per the measurements.
  • This is the last step and once your scale takes the measurements, you can again press calibrate or mode button. This will end the calibration cycle and post-adjustment, the display will show End, Cal or 0. The machine will reset automatically once this has been done and if your machine requires a manual switch off then simply turn off the machine and leave it as it is for next 2 minutes.

These steps can be used to calibrate digital as well as an analogue machine. It is better to opt for a machine which has a feature for auto-calibration. It would certainly be better than choosing a machine that needs to be calibrated.

Balance or scale calibration is important to accomplish accurate weighing results. Overlooking this important assistance activity turns weighing into guesswork. At the end of the day, it is negligent to weigh with a non-calibrated balance or scale. The accuracy of balances and scales turns out to be less reliable after some time. This is because of typical wear and tear brought about by regular use and other external factors, for example, mechanical shocks or hazardous situations. This may prompt a somewhat degradation over a more extended time. Occasionally, schedule a calibration in combination with frequent routine testing. It will incredibly upgrade the lifetime of your balance or scale and its weighing accuracy.

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