Tag: scales

Digital Measuring Devices (Part 2)

In Part 1 of this article, we saw that one of the basic methods by which a digital measuring device operated was the conversion of an analogue signal (often a voltage or an electric current) into a set of digital bits. The number of bits determined the precision with which the device could take a measurement. The article went on to describe the workings of a digital thermometer and how domestic-quality thermometers are often designed around the use of degrees Celsius with displays in degrees Fahrenheit being an add-on where the Fahrenheit display is calculated from the equivalent Celsius measurement.

In this article we will look at how digital weighing devices work.

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Is that really one kilogram?

When a retailer weighs out his product in front of the customer, can the customer trust the scales? It is usually up to local government to certify the accuracy of such scales, though in recent years, certification of measuring devices within much of the world has been privatised with various countries’ national laboratories overseeing the certification process.

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Should the NHS do more to encourage patients to use metric?

Sometimes, the NHS needs to measure patients’ weight and height. The NHS records their weight and height internally in metric units but often tells the patients their weight and height in imperial units, which is preferred by the vast majority of Britons. This requires conversions. During the pandemic, the Government used metres exclusively for social distancing information. We use grams and kilograms for recipes, food purchases and the gym. We are all familiar with these units. So why does the NHS convert from metres to feet and inches and from kilograms to stones and pounds for its patients?

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