Using the DA-130N portable density meter for the first time

By Hank Levi on Mon, May 15, 2017 @ 03:29 PM

This is a quick guide to getting started and running your first test.  We thought it would be helpful for those getting started and checking their first calibration before running tests with actual samples.  We will also continue to explore and share more information about calibration options, general maintenance, and data export methods using the DA-130N portable density meter in future posts.

First, lets review and identify the parts of the DA-130N Portable Density Meter:

Front view of the DA-130N.png

 

Side view of the DA-130N.png

 

Rear view of the DA-130N.png

Display Window.png

 

O.K.  Now let's get started and install three 'AAA' batteries...installing the batteries.png

...And then attach the sampling nozzle.  attaching the sample nozzle.png


A few words about precautions when taking test measurements.

measurement precautions.png

When measuring a sample make sure to hold the instrument so that the sampling nozzle is vertical to the ground.  When laying down the instrument between or after measurements make sure to drain the remaining sample from the built-in syring (the built-in syringe is located inside the meter right above the sampling nozzle).

 builtinsryring2.pngMaintenance - replacing the built-in syringe.png


Now let's run a preliminary test using water.  

Leave the temperature unit (Celsius), measurement unit (g/cm3) and mode (Field) as initial values. Sample pure water using the built-in syringe.  when using the built-in syringe to introduce the sample.png
 
  1. Make sure the sample discharging lever is pushed down to the bottom.
  2. If not, slowly push it down with your thumb.
  3. Dip the sampling nozzle in the sample liquid.
  4. Slowly pull the sampling lever with the forefinger. When the cell is filled with sample, release your finger.
 
 
 
 
After the measurement cell is filled with sample liquid make sure there are no air bubbles in the cell.  If no air bubbles are visible then let's proceed.
 
Example procedure for running first test.
screen view at current temp before stablized.png
The display changes as above and after confirming it is in the automatic stability sense mode. Press [Meas.] key.  When the displayed density is stabalized the value will automatically change reversed as below.  Read the data at this point as well as the temperature degree.
screen changes reverse when stabalized.png
Look up to the pure water density table (appendix 1 in the manual).  If the results agree within +-0.001g/cm3, you can proceed to making your sample measurements!
 
densityofpurewater.png
 
Note: If the results are not within the acceptable range then the measuring cell requires calibration.
 

Calibration of the measuring cell using pure water

calibrationofmesaruingcell.png

Set calibration mode to OFF.  Press the [esc] key 2 times to return to the main menu.  Sample pure water making sure no air bubbles are visible.  The measuring cell with pure water can be calibrated automatically with the key entries as follows:  Press [cal.] key for more than 2 seconds to show CALIB(Water) (inversed colo on the display) showing calibration with pure water in progress.

Screen Shot 2017-05-01 at 1.17.26 PM.png

After calibration is over the deviation from the theoretical value will be shown so that you can check if the calibration has been successfully completed.

Screen Shot 2017-05-01 at 1.17.33 PM.png

Note: if after attempting re-calibration of the measuring cell and results are still not within specifications it is possible the measuring cell itself is contaminated.  In this case ensure to carefully clean the measuring cell and then re-calibrate again.

Note 1: You can also calibrate with a standard liquid that has a known density.  Sometimes calibrating with a liquid that has a similar density to your test samples will help improve precision.

Note 2: You can also calibrate with air.


Some other useful things to know when working with different types of samples:

For more viscous samples over 2,000mPa.s it's a good idea to use the optional syringe adapter set. Almost any commerciall available syringe (plastic works great) will work.  You just need to order the female adapter to make it work (Adapter part number is 12-04428-02)

Sample introduction via Syringe Option.png

When working with samples under 2,000mPa.s of viscosity but where samples contain particles or grains that may crystallize when dry we suggest you use the supplied bellows pump (swap out the built-in syringe for this). 

Maitenance how to replace the built-in syringe.png

 

We hope this information has been helpful!

Get more DA-130N Portable Density Meter Information

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5 ways we use liquid density information

By Hank Levi on Fri, Mar 20, 2015 @ 09:18 AM


5 ways we use liquid density information

ScreenShot2015-03-01at2.46.39PM

Some background:

Simply put density is a physical property of matter. Density is expressed as a ratio of
mass to a given volume mathematically as Density = Mass / Volume. For our industrial
purposes and earth’s known gravitational pull we will define Mass as weight.  For liquids, temperature is an important factor that can affect a liquids density.  Therefore we generally will always describe density at a given temperature for comparison purposes. In general, as liquid temperature increases, density decreases.
Knowing the density of a liquid serves numerous purposes and can provide valuable information for making decisions. Understanding what density is, what affects density, and how density affects other physical properties is important in using and translating this information into an everyday useful tool.


1. We live in a physical world

Earth

We live in a physical world and so it would make sense that we would want to be able
to define these physical properties around us. Having a way to define these physical
properties is helpful to those who need to use the information.
  • >How much space does it take up?
  • >How heavy is it?
  • >How much of this can we put into that?
  • >What is it?
  • >Many everyday products are packaged by volume but sold by weight.
  • >Predictive correlations can be made if you know the density.
  • >If we change some of the ingredients that make up the fluid property will it change the weight?

The neat thing about understanding liquid density is that it can answer not only the three basic questions;

  • beverage>What is the mass of the liquid?,
  • >what is the volume of the liquid?
  • >What is the density of the liquid?

But also, What is the liquid?

2. You can use a liquids density to predict 

Fluid properties are probably even more telling where predictive
correlations can be made with density measurement information. Liquid
density changes as ingredients change. A soft-drink containing more sugar for example will have a different (higher) density than a diet soft-drink. Yes,
sugar not only increases a liquid’s density but can also be inversely measured
by knowing the liquids density in a given liquid solution. Understanding these
correlations provides useful information in the production of many beverages.

3. Density helps us better understand how to transport fluids

Moving fluids from point A to point B. Knowing the volume and the density
helps determine the best way of transporting those fluids. The answer might
be a bigger tanker truck, or for a pipeline it may be a larger transfer pump.
Transportation

4. Density helps set petroleum prices

gaspumpPetroleum is used mostly by volume for the production of fuel, gasoline and
other energy sources. Density is used in petroleum production to give an
estimation of the gasoline or kerosene present thereby helping to determine
the price of the gasoline, for example.
 
In the oil industry quantities of crude oil are measured in metric tons.
Understanding the density allows one to calculate using API gravity the
number of barrels per metric ton –a common term of measure in the industry.
 

5. Density as it relates to gravitygravity

To further explore and expand the usefulness of density measurement we focus our attention on two types of gravity.

Specific gravity

Specific gravity is another way of saying density relative to a given reference material.
In this case we usually mean relative density with respect to water. Water has a
density of 1,000 kg/m cubed at 4 degrees C. We say that water therefore has a specific
gravity of 1 (1,000/1,000). Specific gravity is the heaviness of a substance compared
to that of water. Have you ever noticed how common everyday automotive oil floats
on top of water? Automotive oil has an average density of 905 kg/m cubed at 15
wineglass
degrees C. We can calculate the specific gravity of the automotive oil by dividing 905
by 1,000 = 0.905. You can see that the number 0.905 is less than 1.0 and therefore is 
lighter than water and is why this oil floats.

Looking at specific gravity another way, for those working in the production of wine, the density of
wine increases as you add sugar but falls as the yeast eats the sugar- finished wine should
have a specific gravity somewhere between .99 and 1.01.  Who knew?

API gravity

The American Petroleum Institute (API) came up with their own gravity term referred
to as API gravity. API gravity is simply a measure of how heavy or light a petroleum
liquid is compared to water. By definition, if the petroleum’s API gravity is greater
than 10 then it is lighter than water and will float on water. If the API gravity is less
than 10 then it is heavier than water and will sink. The API gravity scale does not
have a unit of measure per say but is referred to in “degrees” with a scale from 10 to
70. This API gravity scale allows relative densities of petroleum liquids to be
compared. Why is this important? Why do we want to be able to compare petroleum
liquids? Well, the answer has to do with classifying the petroleum by quality. In the
oil industry crude oil is classified as either light, medium or heavy, according to it’s
measured API gravity! The measured API gravity will determine the class of oil and
therefore determine the value of the product.
crudeoil
Light crude oil has an API gravity higher than 31.1 degrees API
Medium oil has an API gravity between 22.3 degrees API and 31.1 degrees API
Heavy oil has an API gravity below 22.3 degree API
Extra Heavy oil has an API gravity less than 10 degree API

 

CONCLUSION:

It is not always easy to understand how density may apply to a given circumstance but
you can hopefully see from this brief introduction that it plays a very important role in
many or our industrial and production processes.
                     


Learn more about instruments that measure liquid density
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