Malvern Mastersizer 3000 Manual

Maintenanc e
95
Hydro dispersion unit specific cleaning procedures
This section provides information about dispersion unit specific procedures.
Hydro MV/LV procedures
Cleaning the flow path
Rinse fresh dispersant through the cell windows, system pipes and sample flow path a
couple of times.This is usually sufficient to prepare the system prior to a new meas-
urement; use the clean routine, It is also possible to specify a clean sequence as part of a
manual or SOP measurement. See the Mastersizer 3000 User Manual for more inform-
ation.
Cleaning the tank
!
Warning!
Never put fingers in the tank when the pump/ stirrer shaft is rotated.
Usually the measurement’s clean routine is sufficient to keep the tank clean. However,
over time deposits may accumulate in the tank.
Inspect the tank once a week. If it needs to be cleaned, disconnect the dispersion unit
from the mains power and use a bottle brush to clean it. Use a detergent (e.g. Decon 90)
if required.
Make several clean flushes to clear all traces of detergent and deposits in the tank.
Hydro EV procedures
Inspect and clean the sample head and flow path
Drain and rinse the beaker, then circulate clean dispersant through the cell a few times.
Usually this is sufficient. But, over time deposits may accumulate on the pump/stirrer
head.

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