Posts Tagged ‘precision scale’
How to Calibrate a Digital Scale
When it comes to explaining how to calibrate a digital scale, here’s a bit of reassurance: Calibrating a digital scale is not that complicated. Because scale calibration is important – required by law in many instances – we offer these instructions on why and how often digital scales should be calibrated.
We’re talking not only precision scales and analytical balances able to weigh in grams and milligrams but also industrial scales weighing in pounds, sales used for recipes, determining percentages, totalizing, counting and other functions used in industry today.
Why you Should Know How to Calibrate a Digital Scale
First of all, as noted above, in many instances it’s required by law. Another source is the National Institute of Standards and Technology’s Weights and Measures Program Requirements, which provides detailed information on this topic.
Why Calibrated Scales are Important
All of us are familiar with transactions where scale accuracy … Read the rest
Tips for Analytical Balance Weighing Accuracy
Accuracy is a prime if not the prime criterion for analytical balances used in industries such as researching and compounding pharmaceuticals. Analytical balance weighing accuracy is a measure of how close the displayed weight is to the actual weight of samples on the weighing pan.
Two terms apply here. The first is readout, which is the smallest difference in weight that can be read and displayed by the unit. For an analytical balance it is typically 0.1 milligram or 0.001 g. Micro and ultra microbalances can weigh lighter samples.
Accuracy is sometimes confused with precision but it is an incorrect assumption. Precise means that results are consistent. However they may be consistently wrong, and therefore not accurate.
Instead, the second term or criterion to look for is linearity. Linearity is the maximum ± deviation of the displayed sample weight vs. the actual sample weight over the weighing range of the … Read the rest
Dual-Range Industrial Platform Scales with Bluetooth Interface
Scales used in industrial locations can be exposed to a variety of contaminants as well as stresses and strains during their lifetime.
A new family of dual-range industrial platform scales with high ingress protection (IP) ratings against dust and liquids are ideal for general weighing, piece counting, tolerance weighing and filtering out vibrations in harsh operating environments. The dual-range Kern SXS series, available from Tovatech, features an extremely rugged stainless steel platform structure resistant to bending. The silicon-coated load cell has an IP rating of 67 or totally protected against dust (6) and against temporary immersion (7). The backlit stainless steel display connects to the weighing platform by a 2.5 m cable. Wall-mountable, the display has an IP rating of 68 for continuous use in wet areas.
These rugged industrial scales have 2-second stabilization and can be ordered with an optional wireless Bluetooth … Read the rest
New Digital Platform Scale Performs Multiple Functions
A newly released family of Kern IKT digital touch screen platform scales now available from Tovatech performs multiple measuring and weighing functions in a single package. This versatile tool allows companies to reduce their scale “inventory” and associated maintenance costs by consolidating diverse measuring and weighing functions from recipe to animal weighing on a single unit. Fully 9 operating modes are accommodated.
Ease of use is another feature of the IKT digital platform scales, all equipped with stainless steel weighing plates, one of which can be used for suspending weighing. Maximum weighing capacity ranges from 3,100 to 151,000 grams. An intuitive backlit LCD digital touch screen measures 5.8 inches on the diagonal to clearly display the functions being performed. Examples include:
- A large keypad for easy input of text and values, also displaying the operator’s name
- A clear menu structure with keys
Internal vs External Analytical Balance Calibration
Calibration is a procedure intimately associated with analytical balances. Calibration determines the relationship between the displayed value and true mass by comparison with a known mass. In other words, calibration determines the accuracy of an analytical balance or precision scale.
Suppliers of analytical balances and precision scales such as Tovatech have sources that provide calibration services and certificates for newly purchased equipment. Good laboratory practices, good manufacturing practices as well as conformance to several published regulations call for regular recalibration of these instruments and adjusting them if required. To accommodate this manufacturers such as Kern offer analytical balances and precision scales with automatic internal calibration and adjustment (if needed) or external calibration and manual adjustment.… Read the rest