Measurement Density Using a Weight Scale

Intelligent Weighing Technology supplies a complete range of high-quality laboratory balances, industrial scales, load cells, and weighing accessories. Its leadership team has more than 70 years’ experience in the weighing and measurement business, both in the USA and worldwide. With its 8,000 square foot facility, Intelligent Weighing Technology offers increased product inventory for faster shipping. We appreciate them providing the content below.

Have you ever heard of Under Weighing Hooks or Below Balance Weighing?

This is a large section of the weighing business that is often overlooked. Of course, many weighing balances have the ability to “under weigh” by the use of a hook that is connected to the weighing mechanism, and much of the time this is used only to weigh items that are too large or bulky to fit on the platform or in the weighing chamber on an analytical balance.

But there is another sector of weighing that is more complex;

Density Determination.

measuring density using a scale

Measurement Density Using a Scale

In this field, we look for the density of our material by using Archimedes Principle of weighing the item in air and then in a liquid. One of the largest industries to use this method of testing is the construction business.

Customers use this for identifying the density of anything from Bitumen in road surfaces, concrete, to core samples taken from the ground where construction is going to take place. Here, an end user will weigh the core sample suspended from the under-weighing hook, (normally in a basket with holes) in air and then, using a bath of water, suspend the core in the water and weigh it again. (Still in the basket).

Seems a  bit complicated? But, with use of a suitable “Below Balance Weighing” device, these measurements are easy to accomplish. The balance will not see the weight of the water, just the effect of the water on the object.

Note! For correct results, the water should be free of contaminants and the temperature of the water is a variable that should be taken into account.

Generally one of these “under balance weighing” balances or scales is not difficult; the customer almost always is familiar with the formulas. For instance, in the construction business often the state has already specified the tests and interestingly, what weighing equipment to use. (Certainly 0.1 g and capacities varying from 3000 g up to 20,000 g)

Density is required for many industries, all you need to do is know which balances have under-weighing capability or, in the case of analytical balances, which ones can have the density kit fitted. The more sophisticated balances have a density program included, so an end user can easily input the data he/she needs to get an accurate and consistent result. Many low capacity balances, such as analytical balances, have density kits that can be purchased; simplifying the process even more.

In fact, the more sophisticated electronic balances have a density program to lead users through the process. So! That is density in solids. There is some scratching of heads when we talk about densities in liquids. How can you do that???

Well, instead of suspending the object in a liquid such as water, you suspend an object of a known weight in the liquid to be tested, sometimes known as Gravimetric Displacement.

In conjunction with the Density Kit, an optional glass sinker enables you to determine the density of liquids. The difference of the weight of the sinker in air and in the liquid is
used to calculate the density.

To recap, the area of density determination with digital scales involves terms like “undeweighing” or “below balance weighing”. Please contact the sales team at Central Carolina Scale (919) 776-7737 or complete our Request a Quote form on the website for assistance with a particular application.

Using an Analytical Balance for Laboratory Applications

In this article, you’re going to learn the correct way to use an analytical balance. These weighing devices are much more sensitive, accurate, and precise than larger topload balances or industrial scales. These balances are used for low mass samples, where specific weights are needed. Before using the balance, you need to make sure that it’s level.

To do this, check the level bubble. If the bubble is located within the black circle then the balance is level. If the bubble is outside of this circle then the balance is not level. If you find a balance that is not level, carefully adjust the foot on each corner until the bubble is located in the center. In most cases, you should not attempt to move an analytical balance because they are very sensitive. If you do, then you will want to make sure the balance is still weighing correctly.

analytical balance

Before you start, you should make sure that the inside of the balance is clean and dry. You should also make sure that all of the doors are closed when you are recording your masses. This prevents air from flowing through the balance. These balances are so sensitive that even air pressure can effect their reading. Now you can begin. The balance should already be turned on with a reading of 0.00 grams on the display. If the display says something other than zero, push the “zero” button. This will reset the balance to 0.00.

The display will also indicate the units of mass. The analytical balance can report masses in several units, so you should ensure to set yours to grams in most cases. Make sure your item is clean and dry, and then gently open one of the doors. Place your item inside and gently close the door behind it. Wait for the reading to stabilize, and then record it.

To remove the item, open the door, just as before, remove your item, and close the door gently. Because analytical balances are much more sensitive than top load balances, there are a few extra precautions to keep in mind. You should never put liquid inside the analytical balance unless specifically instructed to do so. If you do have to put liquid in there, make sure you use a container that seals tightly.

If there are ever any spills inside the analytical balance, clean it up according to the manufacturer instructions. It’s not usually a good idea to add a substance to your object while on the analytical balance. A better choice would be to, remove your item, add your sample, and place it back into the balance.

If you need to make multiple measurements of the same item make sure to use the same balance each time. There is a small error associated with each of the balances so using the same one keeps it consistent so that it cancels out in the difference.

For the most accurate results, you shouldn’t handle the sample with your bare hands. You should use gloves or tongs to handle your sample because the oils on your finger can transfer to the glass, which will be picked up by the analytical balance.

You should never lean on the bench when using the analytical balance because this small difference can alter the weight slightly. Make sure that the item that you are placing into the analytical balance is at room temperature. If it’s above room temperature, it can create air currents within the balance and it can also effect the buoyancy of your item by heating the air around it. This creates an error in your results.

Using expensive and sensitive equipment can sometimes leave you unsure of how to proceed but if you follow the instructions that we’ve presented, then you have nothing to worry about when using an analytical balance. If you need assistance calibrating your scientific scale or perhaps you’re looking to purchase additional laboratory balances, please contact the experienced sales and service staff at Central Carolina Scale, call (919) 776-7737.

How Can I Send Weight Data From My Scale To My Computer?

At Central Carolina Scale we focus on scales and weighing equipment, first and foremost. That’s what we’ve always done. We are constantly working and training to be the best and most knowledgeable scale company that we can be. Now most of that training and on the job training focuses on digital weighing indicators, load cells, scales,  etc… We send scale weight information to various devices such as remote displays.

Customers have always wanted to send weight data from the scale to the computer since personal computers and laptops became prevalent.

send scale weight to computer

So when it comes to sending your scale weight data from the actual digital weighing scale to the computer, how do you accomplish this?

It actually might be easier than you think and it might even be something that you accomplish on your own using our scale equipment and a readily available accessory.

Please note, if you are operating a legal for trade weighing scenario, then you will need to make sure that any software or method that you utilize is legal to use. So for example if you are operating a truck scale and you are looking to send truck weights to your computer, then you will most likely need to utilize a software like Cardinal WinVRS or Rice Lake onTrak as examples.

If you are using a Doran Scales indicator, they have made some great software available for their products. The Doran Excelerator is probably the most basic software that is offered by Doran. It allows weight data to be taken from the scale readout and placed into Microsoft Excel. Doran also has more advanced software packages available.

Cardinal Scale Manufacturing also offers a USB option for some of their weight indicators which makes sending weight data from the scale controller to a USB thumb drive very simple. You can then take the USB stick out of the indicator, load it into your PC and see the weight data on your computer screen.

If you’re using a digital counting scale like the Counterpart for example, Rice Lake has the WeighVault computer software. This is a comprehensive software package that stores and manages data on your PC. With Counterpart you can create custom reports for inventory, threshold, location and more. It is designed for operators with minimal computer experience and managers who require quick and accurate information. Scales can be added or moved on-the-fly without interrupting other scales operating on the network.

Likewise the WeighVault is also available for the CW90 checkweigher. In this case, WeighVault allows CW-90/90X users to add, edit, and access IDs over a network connection. WeighVault surpasses the CW-90/90X’s 50 ID limitation and eliminates front-panel entry of ID parameters. It also collects data as transactions occur, and provides detailed transaction and productivity reports which can be exported to Excel, Word, or PDF.

Now we have talked about all the software above at some point before. But I wanted to also mention a couple of additional choices for end users to consider.

TalTech WinWedge Serial Device Data Collection for serial devices, including meters, balances, scales or any RS232 instrument. WinWedge captures data directly to Excel, Access or any Windows application or web page. It can even send commands out a COM port so you can control your device through hot keys, buttons, or DDE.

WinWedge easily collects data from balances, gauges, meters, sensors, micrometers, barcode scanners, GPS, PLCs, analyzers and other measuring devices and laboratory instruments. It can send the data directly into any Windows program, including Excel spreadsheets, Access databases, and more.

WinWedge is designed to be highly flexible and can easily parse, filter and format your device data to fit your project’s requirements. It can also transmit prompts or commands through the serial port to control your instruments. Winwedge comes in both Professional and Standard versions.

 Setup is as Easy as ONE, TWO, THREE

1. Select your device’s parameters.

Connect your device to your PC’s serial or USB port (installing any necessary drivers) and use the WinWedge interface to select your device’s communications settings, such as the COM port, baud rate, parity, data bits, and stop bits.

2. Define the data structure.

Intuitive, walk-through menus allow you to tailor the data to your needs by splitting the record into multiple fields, filter out certain characters, or format the data to meet your requirements. You can also easily define hot keys and buttons to send serial commands to your device or perform other tasks.

3. Select the mode and activate

Select from either Keystrokes Mode, DDE Server Mode, or Log to Disk, specify the target application or file, and activate WinWedge! Watch as the data from your device “pops” into the Windows application you selected. You can even input the device data directly to a chart or use Excel’s built-in functions to perform real-time analysis.

MicroRidge designs and manufactures a broad range of wired and wireless measurement collection solutions, including WedgeLink hardware and software keyboard wedges. Measurement collection is what they specialize in. They don’t manufacture gauges but they support gauges from a wide variety of manufacturers. The products are made in the USA and support the broadest range of digital & RS-232 gauges, digital indicators, scales, etc….. One nice feature is they provide unlimited and knowledgeable technical support at no charge on all of the products that they manufacture, particularly the keyboard wedge and software keyboard wedge.

What is a Keyboard Wedge?
A keyboard wedge is used when you are trying to get data from some type of measuring device into applications that cannot accept data from a serial port. A software keyboard wedge reads data from a serial port and passes this data to a PC application in such a manner that the application thinks the data is entered via the keyboard. A hardware wedge reads data from digital gauges or RS-232 devices and sends the data to the PC via a keyboard or USB port. The data sent by the hardware wedge looks like keyboard data to the current application. The more common applications that are used with keyboard wedges are Microsoft Excel, Microsoft Access, and other database types of applications.

Software and hardware keyboard wedges are used extensively in data acquisition applications that include statistical programs, spreadsheets, barcode, LIMS, etc. MicroRidge keyboard wedges can accept input data from any RS-232 serial device. The data is then passed to a Windows application in such a manner that the application thinks the data is actually coming from the keyboard.

About Software Keyboard Wedges
The advantage of a software wedge is that it provides much more flexibility in the formatting of data for presentation to the application and control of the target where the data is sent. In addition to transferring the information to the application, the WedgeLink software keyboard wedge can also simultaneously send the information to a disk file. The disadvantage of a software wedge is that your software wedge settings can be changed by your users.

About Hardware Keyboard Wedges
It is not uncommon in a production type environment that a company will insist upon using a hardware wedge rather than a software wedge. An advantage of a hardware wedge is that it is simpler to use because it is more like a plug ‘n play device. In most cases, just plug it in and you are ready to go.

Hopefully this months article will provide you with some resources and ideas when it comes to sending weight information from your laboratory balance to your laptop computer (or whatever your particular needs are). As you can see, there are several good choices available and several choices that will hopefully work for both your budget and your particular requirements. In some cases, you may very well be able to send data from your scale to your computer; and set it up all by yourself with the help of a wedge software.

For more information and assistance for your particular situation, contact our sales department by calling (919) 776-7737 or visiting our website and clicking the Request a Quote button.

Moisture Analyzers are the Secret to Success

moisture balancesDid you ever wonder why your favorite potato chips always have just the right amount of crispness?

Or why your powdered laundry detergent always leaves your clothes smelling of the same freshness?

 

 

The answers to these questions – and quality & consistency of many consumer goods – are dependent upon the moisture content of these products, and Ohaus moisture analyzers can help to ensure quality through precise moisture determination. Many industries rely on moisture analysis to ensure the quality of the goods we use, and consume, daily.

Medicine
Precise moisture analysis is critical to pharmaceutical manufacturing because the moisture content in bulk drugs and intermediates has a direct influence on the quality of the next step in production.

Food
Moisture analysis is critical to quality, taste, and shelf life of many foods. Moisture balances ensure quality at every stage of food production, ensuring tasty and safe final products reach the consumer.

Agriculture
The level of moisture in agricultural goods is key to determining the price of the goods. The accurate and repeatable results produced by moisture analyzers can help ensure fair commerce.

Finally, for a limited time Ohaus is actually rewarding customers with iTunes gift codes for each purchase of MB45 or MB35 Moisture Balances. Contact us at 919-776-7737 for details.

Headquartered in Parsippany, NJ, Ohaus Corporation manufactures an extensive line of high-precision electronic and mechanical balances and scales that meet the weighing needs of virtually every industry. Ohaus is a global leader in the laboratory, industrial, and education channels as well as a host of specialty markets, including the food preparation, pharmacy and jewelry industries. An ISO 9001:2008 manufacturer, OHAUS products are precise, reliable and affordable, and are backed by industry-leading customer support.

Changes On Some Salter Brecknell Weighing Products

Today Brecknell (formerly Salter Brecknell) announced a couple of changes to two products.  The ESA balances and the RGT-160 medical scales.

The ESA lineup will now be listed as the MBS series. The RGT-160 mechanical doctors office scale has been upgraded and is now the HS-200M. So the following part numbers will be changed.

ESA (old)………………………………(new)…MBS
816965003235…………………….816965004881
816965003242…………………….816965004898
816965004409…………………….816965004904
816965003266…………………….816965004911
816965003273…………………….816965004928

RGT-160 (old)…………………….(new) HS-200M
816965000920…………………816965004850

Buy A Lab Balance And Adam Donates Money to African School

To help commemorate Adam Equipment’s 40th anniversary, Adam Equipment has pledged a financial contribution to support the expansion of the Star School in Rwanda, through the Mission Possible global initiative.

In an effort to increase the number of students taught in the primary and secondary classrooms, the school sought to increase the building capacity through a new facility. The building will provide space for an additional 280 students to enroll in classes. This project will increase educational opportunities for the children served by Star School, giving them a chance at a better future and helping them to learn key skills that will provide a lasting effect. The project is scheduled for completion in January 2013, in time for the new term.

Adam has already presented the first of several payments to the Star School, helping to cover the cost of building a larger facility. Construction has started, with the pouring of a foundation for the new structure. This is one small way in which Adam Equipment hopes to commemorate their anniversary and give back to the global community.

For every PW analytical balance, PGW precision balance and PMB moisture balance purchased from now the until end of November*, Adam Equipment will donate an additional $15 to the Star School project. We hope you will take this into consideration as Continue reading

Scale Requirements for Buying Gold

From time to time, someone will contact us looking to start a business buying back gold jewelry from customers. With the price of gold recently it’s becoming more popular than ever. However, there are some real important things to consider. The scale being used to weigh the gold needs to be a precise and accurate scale. In many states, that means the scale used for weighing gold needs to be NTEP approved legal for trade.

For example, in the state of Michigan, the following information is listed on their website regarding buying and selling precious metals. See more at http://www.michigan.gov/mdard/0,4610,7-125-1569_19192_21233-233502–,00.html

The Office of Weights and Measures has received numerous inquiries from local authorities responsible for issuing licenses, and individuals buying and selling gold from retail or residential locations. Operators of businesses buying and selling such commodities by weight in the State of Michigan must comply with the requirements of the Michigan Weights and Measures Law, Public Act 283 of 1964 as amended. Business operators must also check with local authorities for specific requirements of local ordinances and licensing requirements that apply. State Law requires that all commercial transactions conducted, based upon a determined weight, must be conducted with the use of an approved scale.  Below is a summary of the basic requirements for all commercial weighing and measuring devices (scales/meters).

 

  • Scale used is Class II or Class III, NTEP (National Type Evaluation Program) approved (legal for trade)
  • Scale used is tested onsite prior to use by an approved Michigan Registered Agency (third party) or a State Weights and Measures Official
  • A Placed in Service Report and a test report for the device are submitted to the Office of Weights and Measures Continue reading

Ideal Choice For Basic Portable Balances

CORE Portable Balances offer the ideal choice for basic weighing with simple operation and outstanding value.  Compact and durable, Adam Equipment Core balances are the best choice for basic weighing in laboratory environments, junior high school science class, or anywhere you need to weigh light items accurately.  The simple keypad with dual tare keys and a bright backlit display make Core balances easy to use. The tough durable ABS housing is designed to withstand field and laboratory environments, while being easy to clean and protected from accidental spills. With built-in ShockProtect™ overload protection Core balances can handle excessive overloads without a problem. Complete with a removable draft shield, AC adapter, and integral security slot, Core balances are ready to work right out of the box. Continue reading

PW Analytical Balances Feature Value and Performance

Adam Equipment provides a high quality range of laboratory balances, top-loading balances and moisture balances, which are ideal for any type of laboratory, and an extensive range of portable balances covering a wide variety of weighing applications. PW Analytical Balances feature Capacity range of 120g to 250g. The PW series of Analytical Balances are designed to meet the needs of Laboratories, Schools, Industry and commercial users offering a wide range of applications. Adam Equipment’s PW Analytical balances showcase an attractive yet functional design along with advanced features making the PW series your best choice for the laboratory.

The PW Analytical balance incorporates a deceptively simple user interface for easy setup and control of a wide range of smart functions. Internal calibration, security features, and simple and advanced weighing applications can be executed on the spot, without the need for complex calculations. All the PW’s features are packaged into a high power, high performance balance, saving time and resources.

Adam PGW Lab Balances are Built For Everyday Use

All metal construction, an oversized backlit display, and simple, intuitive operation make the PGW a winner in laboratory and industrial applications. That’s because every PGW comes LOADED with solutions for the critical issues that users face: Reliability – The Adam Equipment PGW balance offers proven processing technology plus GLP and custom printouts with date and time, and a capacity tracker to monitor weighing range. Flexibility – Choose a PGW model with internal or external calibration and customize text prompts in English, Spanish, French, or German. Simplicity – The PGW boasts an oversized backlit display with 24mm digits plus modes to meet every lab’s need: counting, percentage, animal weighing, check weighing, net/total, & auto density calculation.

* 18+ Weighing units (including one custom unit)
* Selectable digital filtering for animal / dynamic weighing
* Adjustable filters
* Simple user-friendly operation Continue reading