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5 Handy Tips for Accurate Weighing

Written by Janice M on . Posted in Laboratory Equipment

An accurate weighing system can have a real impact on stock and quality control, because you are able to use exactly the right amount to make every single product.

Little things can add up and make a big difference!

  1. Placement of the Balance:
  2. Place the balance on a stable level table or countertop away from any sources of ventilation, electromagnetics, heat or cold.

  3. Temperature:
  4. Changes in temperature can cause inaccuracies and it is best to weigh items at room temperature. Heat near the scale could result in a lesser reading, because convection currents can make the object more buoyant.

    If your balance is enclosed, warm air weighs less than cold air and can also give a lesser result.

    Allow the balance to warm up first and reach the proper operating temperature, the balance will indicate zero when it is ready for use.

  5. In the Middle:
  6. Centre the object on the weighing pan.

  7. Cleaning:
  8. Balances should always be thoroughly cleaned as small amounts of substances can cause inaccuracy. They can also be exposed to different chemicals that can react with metal in the pan and corrode the surface, or cause danger to the next user of the scale.

    For dry ingredients, a soft brush can be used to clean the balance. For more thorough cleaning, use a cloth dampened with a soapy solution. Take care that moisture does not enter the inside of the instrument. Dry thoroughly with a paper towel.

  9. Calibration:
  10. A scale or balance needs to be periodically checked that it is still accurate. Calibrations are usually done once a year by using calibration weight sets that can be purchased as an optional extra from Selectech; or are performed by a professional, such as Selectech – contact us.

    More sensitive weighing applications with high precision analytical balances will need calibrations to be performed more often, such as when they are moved or even before each use. In such cases, instruments with internal automatic calibration systems may be a worthwhile investment.

You may also be interested in reading a simple explanation of the words used to describe Balances and Scales.

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