(Last Update: May 17, 2016)

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Know More About hausner ratio - compressibility index - agilent tap density tester - vankel tap density tester - varian tap density tester - tap density test - agilent tap density tester - tapped density measurement - overview - specifications - principle - features - demo video - applications - FAQs - tap density price - bulk density testers - USP 616 - tap density definition - tap density calculation - tap density formula
 
Overview
Tapped Density Tester, also named Tapped Density Analyzer or Tapped Density Meter . AS-100 Tapped Density Tester is a bulk density tester used to measure the tapped density of powders, as well as granulated or flaked materials by standardized and repeatable procedures. AS-100 Tap Density Testers are divided into one-station tapped density tester and two-station tapped density tester. AS-100 tap density testers meet all international standards such as USP, ASTM, ISO, EP etc.

Applications in pharmaceutical
- USP 616 Bulk Density & Tapped Density of Powders TAPPED DENSITY Method I & II
- European Pharmacopoeia EP Chapter 2.9.15 Apparent Volume
Applicaitons in metal powders in powder metallurgy (P/M)
- ISO 3953:1993 Metallic Powders-Determination of Tap Density
- ASTM B 527 Standard Test Method for Determination of Tap Density of Metallic Powders and Compounds
Applications in pigments and extenders
- ISO 787 General methods of test for pigments and extenders - Part 11 Determination of tamped volume and apparent density after tamping
 

In addition, AS-100 Tapped Density Tester meets international standards such as
- ASTM D 4164 Standard Test Method for Mechanically Tapped Packing Density of Formed Catalyst and Catalyst Carriers
- ASTM D 4781 Standard Test Method for Mechanically Tapped Packing Density of Fine Catalyst Particles and Catalyst Carrier Particles
- ISO 8460 Instant coffee -- Determination of free-flow and compacted bulk densities
- ISO 8967 Dried milk and dried milk products -- Determination of bulk density
- ISO 9161 Uranium dioxide powder -- Determination of apparent density and tap density

   
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• Tap Density Tester Price
AS-100 Tapping Density Tester Specifications
AS-100 Tap Density Tester Working Principle
AS-100 Tap Density Tester Features
AS-100 Tap Density Tester Applications
What Is Tap Density?
What Is Bulk Density Divided Into?
What Does TAP Mean In a Tap Density Tester?
How to Measure Tapped Density?
Compacted Density and Tap Ddensity
 
Tap Density Tester Pictures
 
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Tap Density Tester Demo Video
 
 
Tapped Density Tester
How to use An AS-100 Tapped Density Tester
Press timer right arrow to adjust the time to be used. Press the up arrow to decide. The maximum time to set is 99min 59sec. In case everything is OK, press the square button to start tapping. In practice, it is possible to determine the minimum tap number N when powder volume does not change anymore. For powders of the same kind, except for special tap number obtained during experiments (not less than N), tap them for 2N times. For metal powders in different size tapping 3000 times can achieve satisfactory results.Vibration frequency adjustment. User can turn the knob to select the appropriate frequency. The maximum is 300 rpm. Usually it is 100-300rpm.
The amplitude of simple design is 3 mm, and frequency 300 tap/min. The tapping number is determined by time multiplying 300/min. The time is set by the timer.We usually set 10 minutes. The maximum working time is 99 minutes 59 seconds. When timer starts to work, the tap density starts to work as well. Please set the timer as follows:press Right Arrow once,panel starts flashing, press Up Arrow to set desired data. Hold until the panel stops flashing, press Square to start working. The tap density tester stops when the time runs out. User can also stop the operation any time by swiching off the machine.
Reason: VOL “ 0 ”;Solution: Reset VOL
Reason: WT “ 0 ”;Solution: Reset WT
Reason: WT or VOL “ 0 ”;Solution: Reset WT and VOL
Reason: Out of printing paper;Solution: Install new printing paper
Reason: Thermo paper installed in wrong direction or bad paper quality ;Solution: Check the paper or replace
Reason1:Forget to turn on speed adjuster. Solution1: Turn on speed adjuster.Reason2:Set low speed;Solution2: Turn the knob clockwise.Reason3: Tap finishes or TAP NUM “0”;Solution3: T Reset tap number.
Reason:Linear bearing lack lubricant;Solution: Add some lubricant
Reason1:Forget to turn on AS-100 Tap Density Tester;Solution1: Turn on unit. Reason2:fuse was burnt out.Solution2: Use new fuse

After calculating and display, press the "PRINT" when green indicator light is on.

After above step, press "CAL"(Tap Density Calculation), the computer completed density calculation based on ρ = m / v (Tap Density Formula), and display the tap density results.

If the powder surface is level, read it directly. If not, read both max and min and use averaged results. Keep an estimated value. Press the "VOL" and input volume number.

Press the "TAP NUM", enter tap number. Press the "START" until the set number is completed, and instrument stops automatically. In practice, it is possible to determine the minimum tap number N when powder volume does not change anymore. For powders of the same kind, except for special tap number obtained during experiments (not less than N), tap them for 2N times. For metal powders in different size tapping 3000 times can achieve satisfactory results.Vibration frequency adjustment. User can turn the knob to select the appropriate frequency. The maximum is 300 rpm. Usually it is 100-300rpm.

Add all sample into the cylinder, keep powder surface level. Place cylinder assembly into the vibration platform.

Weigh an appropriate amount of the sample. Turn on AS-100, press “ WT ” , input numbers, and Max 5 digits.

Typically, the powder is testable in its actual state. In some cases, user has to dry powder. If the powder is easily oxidized, dry it in a vacuum or inert gas. If the powder contains a volatile substance, do not dry. If it is not possible to be dried, test it in its actual state.

Use tube brush to clean the inside of cylinder, or flush it with solvent such as acetone. If you use a solvent, it should be thoroughly dried before test.
AS-100 uses thermal paper width 57.5 ± 0.5mm. Printing paper is installed when export. The green LED becomes flashing when the paper runs out. Turn off the unit, and then press the round button to open paper cabinet, remove the paper tube and load the new paper. Make the thermal side facing up. Close the door, and pull the paper end out from the slot. Turn on the unit, the green light stop flashing. Press the green LED (green LED also works as a key), a section of printing paper moves forward. When the unit is turned off, press the green button, at the same time turn on the unit then leave the green LED, it prints self-check slip.
The maximum amplitude is 15mm and the default is 3mm (made up of 1 pc 1mm and 1 pc 2mm tapping washer). More tapping washer are available (1mm, 2mm or 5mm).
Amplitude = Total height of tapping washer
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-Place Polyurethane washer from the upper side of the cylinder.

-Place screw cap from the upper side of cylinder.

-Place silica jel pad on bottom of the cylinder,

-Screw down the cap slowly until get fixed.

-Place the tapping apparatus into the hole in the guide bearing.

Note: The cylinder is fragile, please handle carefully.

 
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Save "TAP NUM," "WT", "VOL", "No." Operator needn't input again when he test again if he does not change anything. Re-test samples, such as some of the data has not changed, the need to re-enter the data. "No." is automatically increased by 1 after each calculation.
Print test report
Tap Denisty Calculation(Calculate on data obtained)

Restore the system to boot state, all data is restored to the status before pressing OK

Remove the last bit of data just entered.
Stop tapping before obtaining a result. Test report only shows the actual tap numbers. In the absence of re-setting "TAP NUM", press "START" button, the system continues the remaining tap.
Start test
Test result
Tap number of the test
Volume of the powder
Weight of the powder
Reference number of the test
Frequently Asked Questions
What are the features of accoustic cabinet for AS-100 tap density tester?
In what units tapped density report?
Measures of Compressibilty Index/Hausner Ratio
How to determine the apparent volume by a Tap Density Tester?
How is the bulk density of a powder determined?
What affect the bulk density?
Tap density formula
Tapped density
Tap density USP
How to express bulk density
What factors afffect bulk density?
 
Compressibility Index
Compressibility Index is a calculated data other than measured data, it is calculated by the formula:
Compressibility Index = 100(V0 - VF)/V0
V0 is unsettled apparent volume
VF is final tapped volume
The Compressibility Index is measure of the propensity of a powder to be compressed as described above. As such it is measure of the powder's ability to settle, and it permit an assessment of the relative importance of interparticulate interactions. In a free-flowing powder, such interactions are less significant, and the bulk and tapped densities will be closer in value. For poorer flowing materials, there are frequently greater interparticle interactions, and a greater difference between the bulk and tapped densities will be observed. These differences are reflected in the Compressibility Index.
 
Hausner Ratio
Hausner Ratio is V0/VF.
V0 is unsettled apparent volume
VF is final tapped volume
The Hausner Ratio is measure of the propensity of a powder to be compressed as described above. As such it is measure of the powder's ability to settle, and it permit an assessment of the relative importance of interparticulate interactions. In a free-flowing powder, such interactions are less significant, and the bulk and tapped densities will be closer in value. For poorer flowing materials, there are frequently greater interparticle interactions, and a greater difference between the bulk and tapped densities will be observed. These differences are reflected in the Hausner Ratio.
 
Agilent Tap Density Tester, VanKel Tap Density Tester, Varian Tap Density Tester
Agilent tap density tester is a tap density tester offered by Agilent Technologies. It calls it VanKel or Varian tapped density testers.
VanKel tap density tester is a tap density tester made by VanKel Inc USA.
Varian tap density tester is a tap density tester made by Varian Inc USA.
Above three tap density testers refer to the same tap density testers including
Model 50-1000(single platform),
Model 50-1200(double platform) or
Model 50-2200(double platform)
 
USP 616
USP 616 is The United States Pharmacopeial Convention Chapter 616 BULK DENSITY AND TAPPED DENSITY OF POWDERS. It describes and standardizes a method to measure the bulk denisty and tapped density of bulk powders.
 
Tap Density Definition
The tapped density definition is an increased bulk density attained after mechanically tapping a container containing the powder sample. The tapped density is obtained by mechanically tapping a graduated measuring cylinder or vessel containing the powder sample. Definition of tapped density is an increased bulk density attained after mechanically tapping a container containing the powder sample. Tapped density is obtained by mechanically tapping a graduated measuring cylinder or vessel containing a powder sample. After observing the initial powder volume or weight, the apparatus measuring cylinder or vessel is mechanically tapped, and volume or weight readings are taken until little further volume or weight change is observed. The mechanical tapping is achieved by raising the cylinder or vessel and allowing it to drop under its own weight a specified distance by either of three methods as during tapping may be preferred to minimize any possible separation of the mass during tapping down. This parameter is very important in packing the material. During tapping of the sample, the smaller particles try to fit themselves in gaps of the larger particles and hence the total volume of the powder reduces.
 
 
 

Bulk Density Testers
AS-6393 Powder Tester Pharmaceutical, Carr Index, powder flowability
AS-100 Tap Density Tester Tapped density
AS-200 Scott Volumeter Scott density
Metallic powder, hall flowrate, apparent density
AS-601 Bulk Density Tester Plastic, bulk density, ISO 60
AS-602 Bulk Density Tester Plastic, bulk density, ASTM D1895 Test Method B
AS-603 Bulk Density Tester Plastic, bulk density, ASTM D1895 Test Method A
AS-604 Pharmaceutical Plastics Pourability Tester Pharmaceutical flowability and plastic pourability

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