Maintenance
Chapter 5
Zetasizer APS Basic Guide
Page 5-3
Cleaning the instrument
The instrument should be regularly cleaned externally to remove any sample spill-
ages, plus regular cleaning of the measurement components to ensure optimum
performance.
Warning!
Before cleaning, always disconnect the instrument from the power supply
and disconnect all electrical cables.
Caution!
The surfaces of the instrument may be permanently damaged if samples or
solvents are spilt onto them. If a spillage occurs, disconnect the system
from the power supply before cleaning it up.
Clean the covers periodically using a mild soap solution.
Never
use excessive liquid to clean the instrument and always avoid electrical
components (connectors, etc.).
Always
ensure that the instrument is completely dry before applying power.
The paint has a solvent resistant finish, but it is good practice never to use a sol-
vent based solution as this may damage the painted surfaces.
Never
use an abrasive cleaner to clean the instrument as this may damage the
painted surfaces.
Never
use compressed air.
Cleaning the internal measurement components
During and after each measurement session, it is important that the internal meas-
urement components (tubing, measurement block and needle) are rinsed out and
cleaned sufficiently. This is necessary to ensure consistent and accurate measure-
ment results. Use the
APS Wash Controls
as described below.
The wash controls are used as part of the SOP sequence (refer to the
Zetasizer
APS User manual
for details) and can also be accessed separately as good practice
for reducing contaminants in the system. It is recommended to occasionally clean
the system without initially making a measurement. This has the effect of flushing
the tubing, measurement block and sample needle to ensure that any residual sam-
ple is completely removed.
MAN0494-1 (Zetasizer APS Basic Guide).book Page 3 Friday, August 9, 2013 2:08 PM