List of Articles in the Category Lab Scale

Selection Tips for Precision Digital Scales

10 Selection Tips for Precision Digital Scales

Today’s precision digital scales, also referred to as digital balances, perform a broad range of weighing-related functions in R&D, quality control, and similar applications where accuracy and precision are key criteria to meeting government, trade association, and industry-promulgated standards.  For purposes of discussion this post focuses on weighing equipment used in comparatively protected environments vs. scales found on manufacturing floors, shipping and receiving departments.  Let us hasten to add, however, that the need for precision and accuracy is important for any application, and equipment is available to meet required standards regardless of where scales are employed.

Precision and Accuracy Defined

Certain of our posts discussing precision digital scales and analytical balances harp on an important difference between precision and accuracy as selection criteria.  Allow us to cite an example:  A $5,000 wristwatch may be precise, but if the hands are set wrong it does not show the accurate time.  More … Read the rest

Wireless Platform Scale Works Most Anywhere

Wall-Mounted EOS-F Wireless Platform Scale Module

Wall-Mounted EOS-F Wireless Platform Scale Module

Taking a digital platform scale to the job rather than the job to the scale is easier with the new Kern EOS-F wireless platform scale now available from Tovatech.  What sets it apart from conventional platform scales is a 3-channel integrated radio that communicates between the display/control module and up to 3 weighing platforms. Connectivity extends to 10 meters clear sight. The system operates on standard current or up to 70 hours with optional battery power.

This wireless platform scale works as a non-automatic balance. Operators manually and carefully place material to be weighed in the center of the weighing plate. Once a stable weighing value is reached (the scale is stabilized) the weighing value can be read.  Data should be manually recorded for record-keeping.

A grab handle and 2 rollers on the 36 x 22 x 2.5 inch weighing platform facilitate transport between … Read the rest

Specifying an Economical Precision Balance

The Kern PKS Precision Balance

The Kern PKS Precision Balance

Academic and industrial research labs working under tight budgets face balancing cost and performance when specifying precision weighing equipment.  The new Kern PKS precision balance now available from Tovatech definitely deserves consideration.  Simple to operate and with an easy to read graphic display it is offered in five models starting with a maximum weighing range to 201 grams (readout 0.001 gram) to 10,100 grams (readout 0.1 gram).  The other weighing ranges and (readouts) are 361 (0.001), 2010 (0.01), and 3610 (0.01).

A Precision Weighing Balance for Multiple Laboratory Tasks

The PKS precision weighing balances handle many of the more common weighing and measuring tasks in research labs and other industry sectors where accuracy is important.  Even with an attractive price tag it has a 3-second stabilization time, a vibration filter and stores up to 40 memories in each weighing mode.  Using the handy navigation guide … Read the rest

Procedure to Calibrate & Certify Analytical Balance Weights

Periodic calibration and certification of your analytical balance weights is a regulatory requirement in most industries

Periodic calibration and certification of your analytical balance weights is a regulatory requirement in most industries

Wondering about the procedures followed to calibrate and certify analytical balance weights? This handy document from the Texas Department of Transportation should set your mind at ease.  The document is in several parts.  It defines the scope of the test procedure and instructs the user to calibrate and certify weights using tolerance standards that are traceable to the National Institute of Standards and Technology (NIST).  The first part focuses on calibrating precision weights and defines both the scope as well as the procedure to be followed. Likewise the second part also defines the scope and procedure but focuses on general purposes weights. Finally, the third part describes the scope and procedure for adjusting weights.

For further information visit ftp.txdot.gov.

Analytical Balance Tests Tablet Splitting

Before and after split weighing on an analytical balance showed the splitting device as the best option for splitting tablets

Before and after split weighing on an analytical balance showed the splitting device as the best option for splitting tablets

Tablet splitting is a common practice when you need to give less than a full dose. However this has significant risks as this study found out.  Five volunteers were asked to mimic the practice in nursing homes using a splitting device, a scissor, and a kitchen knife.  The splitting device turned out to be the most accurate way to split a tablet.  Using an analytical balance the researchers measured the difference between each of the methods before and after the split.  The scissor and knife produced statistically similar results while the splitting device had a statistically significant lower mean deviation from the theoretical weight after the split.  There was also significantly less weight loss with the device than with the knife or scissors.

For further information visit www.ncbi.nlm.nih.gov.

Analytical Balance Aids in Study of Metal Corrosion

Analytical Balances are useful in metal corrosion studies

Analytical Balances are useful in metal corrosion studies

This study examines the effect of electrochemical corrosion on waste packages where there is a significant possibility of exposure to humidity leading to water film formation and subsequently corrosion.  The objective of the study was to test the susceptibility of different metals under different ranges of humidity over a long term period of 5 years or more.  The results of the study would then form the basis of input to other programs including things like ‘Recommendation for Container Materials’ amongst others.  An analytical balance and a calipers were used to measure and weigh the test specimens.  Both were calibrated with NIST traceable gage blocks and weights.

For further information visit e-reports-ext.llnl.gov.

Use of Analytical Balance in Analytical Chemistry

Learn how to use and read analytical balance readings for accurate experiment results.

Learn how to use and read analytical balance readings for accurate experiment results.

Here is the essential details of day 1 in a course in instrumental chemical analysis.  The objective of the course is to give students experience in using the instruments used in Analytical Chemistry.  The course stresses on both the instruments as well as the methods used to perform analysis.  The typical lab will have optical spectrometers, chromatographic equipment, analytical balance, and other equipment.  The study would be conducted from different perspectives including such things like: underlying principles, important components, historical and economic points, instrument performance, design, typical application areas, pragmatic issues and son on.

For further information visit www.bgsu.edu.

Safety & Analytical Balance Accuracy in the Chemistry Lab

Accurate measurements on the analytical balance are mandatory for successful experiments.

Accurate measurements on the analytical balance are mandatory for successful experiments.

Here is an introductory set of instructions for students in the chemistry lab.  Other than the assignment reading it also provides specific instructions on various aspects of working in the chemistry lab.  Safety in a lab is paramount and students are advised to familiar themselves with the safety protocol and the location of various safety equipment like fire extinguishers.  Familiarization with the Material Safety Data sheet is a another important perquisite of working in a lab.  Accidents may happen and the MSDS provides a ready reference point for emergency personnel to understand the source of the accident and provide suitable treatment.  Students are also advised to familiarize themselves with the analytical balance and precision scale as all measurements need to be accurate for successful experiment results. It then goes on to provide examples of experimental procedures that sill help … Read the rest

Measure the Weight of Breeze with a Scientific Digital Scale

While this video is the retelling of an ad campaign, the message it conveys about Kern balances and precision scales is accurate.  The ad campaign focused on asking the audience to guess the weight of extremely low mass objects – including the weight of breeze from a fan.  Precision measurement instruments from Kern are backed by decades of engineering excellence.  This shows up in the video time and again.  The scale precisely counts down the mass of the burning candle as the wax evaporates, the feather even though it barely touches the weighing pan records precise measurements to several decimal places. Using a Kern digital scale for scientific measurements gives you the assurance of accurate readings and sturdy long lasting builds.

Prevent Toxic Poisoning By Using Analytical Balances the Right Way

Follow Best Practices When Using your Analytical Balance to Prevent Dangerous Contaminations

Follow Best Practices When Using your Analytical Balance to Prevent Dangerous Contaminations

We’ve blogged about the do’s and dont’s when it comes to analytical balance use and chemical handling in the lab.  We’ve however not established it with a live case study.  Here is an example of what can result from improper handling of chemicals and sub-optimal use of the analytical balance.  It started with the detection of abnormally high levels of arsenic in the urine of an employee at an affiliated laboratory.  Investigations revealed that the entire process of using the analytical balance and weighing flouted several best practices.  In fact the contamination was so high that an external decontamination crew had to be called in.  The article reinforces the need to follow best practices when handling chemicals.

For further information visit risk.arizona.edu.