On the Importance of Quality in a Precision Scale or Balance
Category: Articles
Posted: 02-02-2012 14:28:00
Views: 11
Blog Comments: 0
When you are purchasing a measuring device where you expect it to deliver results that are accurate to 0.001% (1 part in 100,000) or 0.0001% (1 part in 1,000,000) and to do so for an extended period of time (like 5 to 10 years), it is wise to invest in a quality device. Modern high accuracy digital scales are almost all based upon magnetic force restoration load cells. The load cell is the heart of the scale and must be properly designed and assembled of high quality components. How can you, the user, know the quality of the load cell? In truth, you can’t know and must rely mainly upon the reputation of the manufacturer.
Category: Articles
Posted: 02-02-2012 14:28:00
Views: 11
Blog Comments: 0
When you are purchasing a measuring device where you expect it to deliver results that are accurate to 0.001% (1 part in 100,000) or 0.0001% (1 part in 1,000,000) and to do so for an extended period of time (like 5 to 10 years), it is wise to invest in a quality device. Modern high accuracy digital scales are almost all based upon magnetic force restoration load cells. The load cell is the heart of the scale and must be properly designed and assembled of high quality components. How can you, the user, know the quality of the load cell? In truth, you can’t know and must rely mainly upon the reputation of the manufacturer.
Laboratory Balances, Analytical Balances, Semi-Micro Balances, Micro Balances, Why?
Category: Articles
Posted: 01-18-2012 21:53:00
Views: 154
Blog Comments: 0
Each of the named types (classes) of Balances (Scales) that appear in the title has its proper place the hierarchy of weighing. One thing that they all have in common is that they are high accuracy and high resolution devices designed to do precise weighing in many scientific and industrial applications. Where they differ is mainly in the weight ranges that they are designed to cover and their accuracy.
Category: Articles
Posted: 01-18-2012 21:53:00
Views: 154
Blog Comments: 0
Each of the named types (classes) of Balances (Scales) that appear in the title has its proper place the hierarchy of weighing. One thing that they all have in common is that they are high accuracy and high resolution devices designed to do precise weighing in many scientific and industrial applications. Where they differ is mainly in the weight ranges that they are designed to cover and their accuracy.
Selecting Moisture Analyzer Configuration Parameters
Category: Articles
Posted: 01-02-2012 09:12:00
Views: 190
Blog Comments: 0
Simply stated “It ain’t easy”. However, if we take a somewhat systematic approach it may not be too hard. Our observations here are intended for Halogen lamp drying systems but apply equally well to IR drying systems. The major difference being that Halogen systems are quite a bit faster because of the broader spectrum of radiation which generates the heat to drive off the moisture. Halogen Moisture Analyzers are far and away the predominant type of units used in both labs and industry. These units generally require the user to select a heating profile, a heating level or gradient, heating cutoff criteria, and a preheat time if a rapid temperature run up mode is selected.
Category: Articles
Posted: 01-02-2012 09:12:00
Views: 190
Blog Comments: 0
Simply stated “It ain’t easy”. However, if we take a somewhat systematic approach it may not be too hard. Our observations here are intended for Halogen lamp drying systems but apply equally well to IR drying systems. The major difference being that Halogen systems are quite a bit faster because of the broader spectrum of radiation which generates the heat to drive off the moisture. Halogen Moisture Analyzers are far and away the predominant type of units used in both labs and industry. These units generally require the user to select a heating profile, a heating level or gradient, heating cutoff criteria, and a preheat time if a rapid temperature run up mode is selected.
The Difference between a Scale and a Balance
Category: Articles
Posted: 12-19-2011 08:49:00
Views: 198
Blog Comments: 0
In the past all precision weighing devices were equal arm balances. These devices operated very much in the way that a child's teeter-totter works. Each side of an equal arm balance has a weigh pan on it. The unknown weight was put on one weigh pan and known weights were added to the other pan until the scale came to its equilibrium position, indicating that the known weights added up to equal the unknown weight. Thus, the term “balance” was truly an accurate description for this type of weighing device. It required a set of known accurate weights and the user had to add up the values in order to determine the value of the unknown weight.
Category: Articles
Posted: 12-19-2011 08:49:00
Views: 198
Blog Comments: 0
In the past all precision weighing devices were equal arm balances. These devices operated very much in the way that a child's teeter-totter works. Each side of an equal arm balance has a weigh pan on it. The unknown weight was put on one weigh pan and known weights were added to the other pan until the scale came to its equilibrium position, indicating that the known weights added up to equal the unknown weight. Thus, the term “balance” was truly an accurate description for this type of weighing device. It required a set of known accurate weights and the user had to add up the values in order to determine the value of the unknown weight.
Auto calibration … is it worth the investment
Category: Articles
Posted: 11-09-2011 09:17:00
Views: 381
Blog Comments: 0
One answer to the question could be that it all depends upon the cost. That is true enough, so let's look at the typical cost of the internal auto calibration (IAC) features (we compare identical scales with and without the future). In the 100 g to 500 g capacity range the feature costs approximately $200.
Category: Articles
Posted: 11-09-2011 09:17:00
Views: 381
Blog Comments: 0
One answer to the question could be that it all depends upon the cost. That is true enough, so let's look at the typical cost of the internal auto calibration (IAC) features (we compare identical scales with and without the future). In the 100 g to 500 g capacity range the feature costs approximately $200.
The Moisture Analyzer; Oven over a Computerized Scale
Category: Articles
Posted: 10-04-2011 09:11:00
Views: 389
Blog Comments: 0
That is a simple observation that covers a wide range of capability. The first important difference is in the scale used. It may be one of three types; first the lower cost and lower accuracy (approximately 1 part in 3,000) industrial scale based upon strain gauge technology, second the higher cost and higher accuracy (approx. 1 part per 100,000) laboratory scale, and third the highest cost and most accurate (approx. 1 part per 1,000,000) analytical scale. The high accuracy scales do not produce moisture measurements of comparable accuracy as the heating and other factors become large contributors to overall accuracy. Because of this the analytical scale is rarely seen in a moisture analyzer except in research type instruments.
Category: Articles
Posted: 10-04-2011 09:11:00
Views: 389
Blog Comments: 0
That is a simple observation that covers a wide range of capability. The first important difference is in the scale used. It may be one of three types; first the lower cost and lower accuracy (approximately 1 part in 3,000) industrial scale based upon strain gauge technology, second the higher cost and higher accuracy (approx. 1 part per 100,000) laboratory scale, and third the highest cost and most accurate (approx. 1 part per 1,000,000) analytical scale. The high accuracy scales do not produce moisture measurements of comparable accuracy as the heating and other factors become large contributors to overall accuracy. Because of this the analytical scale is rarely seen in a moisture analyzer except in research type instruments.
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