Scales and balances form an integral part of any laboratory. Being able to get accurate readings in terms of measurements and weights is important to industry and research labs. Investing in analytical balances for laboratories makes weighing tasks easier and more accurate. With an analytical balance, you will be able to set up limits for repetitive tasks. Each time you top up the measuring level, a signal is shown if you are beyond the limit or are not really there. It can measure down to the micromilligrams in most cases.
When you purchase an analytical balance, choose one that has two platforms that remain unaffected by gravity. This is with the thought of maintaining accuracy level. A two-platform balance can be used in any environment irrespective of where you put it. Additional features that add the level of accuracy are the digital readings it gives out. Analytical balances have a more controlled environment than usual weighing scales. The glass or plastic enclosure enables a more accurate weighing and preserves the integrity of the sample .
Evaluate the purpose of the analytical balance. These vary in capacities and prices. There are models that simply give you measurements accurately. These are known as microbalances and ultra-microbalances. These balances have a multi unit feature. Example of these are newtons and grains, grams and ounces. Analytical scales can be expensive, with a price range of $2000 to $4000. Calibration then plays an important role in the accuracy of the output.
Ask for calibration recommendations from you vendor. You will also need to follow your own set of procedures. It is necessary to ensure that the balance is level at all times and is an environmentally stable area. Proper ventilation is also important. These are a few simple basics that will ensure the accuracy of your analytical balances above all other measuring equipment.
To preserve the accuracy of your analytical balance and thereby the lab work that is dependent on it, there are a few points you need to keep in mind. Know the procedures relating to calibration. There can be constant checks on those equipments to comply with ISO 9000 requirements. The onus falls on the owner of the machine to keep it well maintained. When measuring, especially with small amounts, slowly put the sample in the weighing container which is previously placed at the center of the pan, and wait for it to stabilize . This forms good practice and reduces the rate of erroneous readings. Keep a discharge ionizer in place in case of weighing non-conductive materials. In such cases, measurements can be completely thrown off.
An analytical balance is important in a lab set-up. Accuracy of readings is essential when it comes to making of medicines or even related research. While analytical balances are accurate, the optimum levels depend on the appropriate usage of the machine.
This article was written by Dr. Bob Sandor, a Director at Tovatech, a leading North American supplier of analytical balances. When not busy running his company, he explores his fascination with the many aspects of various scientific & industrial devices. For more information on this article visit the Tovatech site from any of the above links.