Malvern Mastersizer 3000 User Manual

Chapter 4 Making measurements
Page 4-14 MAN 0474
7. Choose an appropriate SOP for the Aero dispersion unit (ensure also that the
SOP is optimized for the venturi type that is fitted to your Aero unit - either
stainless steel or ceramic venturi) and then click OK.
The Measurement Display window shown below is displayed:
8. Click Start – the SOP automatically aligns the optical system and then
measures the background using the red light (blue light is not used in dry
measurements).
9. After this, the sample tray starts vibrating and the SOP-specified air pressure is
applied. The overall rate at which the sample is fed into the cell is a function of
the combination of air pressure, vibration rate and hopper flow-rate setting.
Note
To stop both the SOP and the accessory during a measurement, click the
Abort button .
10. The SOP selected should be optimized for the dry dispersion unit and will
only make a measurement once the obscuration is within the specified range
(1-10% obscuration is the rough guide for a dry dispersion unit).

Malvern Mastersizer 3000 Specifications

General

Measurement principle	Laser diffraction
Blue laser wavelength	470 nm
Sample dispersion options	Wet and dry dispersion
Data acquisition rate	10 kHz
Particle size range	0.01 to 3500 microns
Laser type	He-Ne and solid state
Accuracy	Better than 1%
Repeatability	Better than 0.5%
Technology	Mie and Fraunhofer theories
Sample dispersion units	Hydro MV, Hydro LV, Aero S
Optical model	Mie theory
Power requirements	100-240 V, 50/60 Hz
Detector arrangement	Log-spaced array