27 November 2014

Instrument in design: Mini 3D

measuring range: 0,5-2000 µm

AWK 3D

measuring range: 0,2 - 31,5 mm 

2DiSA

measuring range: 0,5 - 2000 µm 

IPS K

measuring range: 0,4 - 300 µm 

IPS UA

measuring range: 0,5 - 2000 µm 

Averager

For particles up to 2 mm

IPS T

measuring range: 0,4 - 300 µm 

AWK D

measuring range: 50 - 4000 µm 

AWK B

measuring range: 1 - 130 mm 

IPS SAM

measuring range: 0,4 - 300 µm 

IPS L

measuring range: 0,2 - 600 µm 

IPS LCW

measuring range: 0,2 - 600 µm 

IPS U

measuring range: 0,5 - 600 µm 

IPS A

measuring range: 200 - 2000 µm 

Analyzers

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PURPOSE

For laboratory measurements of grain-size distribution of particles irrespective of their physical and chemical properties. Measurements are taken in the air.
For measurements of substances with moist and bonding grain in the range from 0.5µm to 600 µm
For measurements of non-bonding grains in the range from 2 up to 2000 µm (option)
The analyser determines size, shape and specific surface of the particles.

 

MEASUREMENT PRINCIPLE

The measurement method of the IPS analyser is complex and consists in measurement with regard to influence of laser diffraction for the smallest particles in order to go on, for larger particles, in a continuous and gradual manner, to measure changes in the radiation stream scattered by moving particles.In this way, certain disadvantages of the “laser diffraction” used in the entire measuring range in which individual, largest particles yield weak changes in the diffraction pattern have been eliminated.
There are no optical limitations for measuring individual, small and large particles in the IPS analysers.
The laser radiation stream in infrared not only identifies size of particles, but also renders counting them precisely in the entire measuring range possible.

An electric impulse corresponds to each participle. The impulse is proportional to the particle size.
The set of particles is initially measured with the division into 4096 channels and converted (calibrated) into 256 size classes, which are available to a user.

 

MEASUREMENT PROCEDURE

The analyser consist in measuring sensor [1] and measuring system [2], that is integrated with automatic, electronic feeding system [3], that assures the continuity of the measurement and controls concentration of the particles in the measuring zone. Computer [5] controls whole measuring process.

The miniature compressor [4] with special characteristic adjusted to gradual airflow is main operating element.
The ultrasonic feeder [6] is used to separate particles in feeding process. The US feeder has shape of a concave vessel, with bottom that vibrates with frequency ~40 kHz and amplitudes of few mm. Thanks to vibrations wet substances (e.g. ash) are getting dry during
measurement, so even high humidity of the probe has no effect on results. For measurements of various, different powders the control of amplitude and number of
ultrasonic impulses has 4000 intermediate states between zero and maximum feeder activation.

For precise feeding the control of airflow is necessary as well. The airflow rises separated particles and transports them to measuring zone. The control of airflow has around 300 speed levels. So precise control of feeder allows to measure every single particle in a very fast way (up to dozen or so thousands particles per second) and to avoid particles coincidence in measuring zone.

For bigger particles from several hundreds mm up to 2 mm the automatic feeder [7] is used. During operation the air flow and the geometry of automatic feeder are changing.
Apart from the measurement program determining grain-size distribution of particles, the other, very useful programs are also provided, e.g. optimisation program for a given parameter in the granulation function, calibration program converting granulations in a given calibration, whether sieve, aerometric or spherical. Test results are presented on multicoloured diagrams and in the form of legible tables.

 

CHARACTERISTICS

-  measuring range 0,5 - 2000 µm 
-  number of measuring classes  256
-  light source  Infrared or laser diode
-  power supply  230 V AC, 50 Hz
-  operating temperature  278 do 313 K
-  analyser weight  12 kg
-  recording and archiving measurement results  automatic

 

ARTICLE PDF

 

IPS UA

Analyzer 

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