How to Improve Lab Balance Weighing

lab balance
Cole-Parmer® Symmetry® PA-T Advanced Touch-Screen Analytical Balance

Properly use and maintain lab balance for optimal performance.

Using your lab balance with poor weighing techniques can greatly contribute to the uncertainty of measurement (combined weighing errors), causing you to inadvertently use your balance incorrectly. It’s not a bad idea to periodically brush up on your weighing techniques.

Here are 5 tips for increased weighing performance:

  1. Before weighing, ensure your balance is leveled correctly. When the balance level is changed, the metrology of the balance is affected. Checking the level of the balance shows if the balance has been disturbed or moved.
  2. When handling your sample, never use your hands to place tare weights or samples in the weigh chamber. The heat from your hand can cause weighing errors in the fourth and fifth decimal places of a gram.
  3. When placing items to be weighed onto the weigh pan, only open the draft shield door on the side to which you are weighing, e.g. if you are right-handed, open the right door.
  4. Understand how your particular model of balance indicates a stable weight (i.e., gives a weight that you can safely trust as a result). All electronic balances give a visual indication of weight stability.
  5. Before starting to weigh on an analytical balance, close the draft shield completely and zero using the “0” or “Tare” key on your balance display.

Read the article Better Weighing Skills Mean Better Weight Accuracy.

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