6 SAMPLE PREPARATION WP4C
Cautions
• Never leave a sample in your WP4C after a reading has
finished. The sample may spill and contaminate the
instrument chamber if the instrument is accidentally
moved or jolted.
• Never try to move your instrument after loading a sam-
ple. Movement may cause the sample material to spill
and contaminate the sample chamber.
• Take special care not to move the sample drawer too
quickly when loading or unloading liquid samples, in
order to avoid spilling.
• If a sample has a temperature that is higher than the
WP4C chamber (Ts-Tb is a positive number), take the
sample out immediately, put a cap on it, and cool it.
Warm samples can cause condensation in the chamber
and adversely affect subsequent readings.
• The physical temperature of the instrument should be
between 5
◦
C and 40
◦
C. The WP4C will measure sam-
ples between this range quickly and accurately.
• If you are reading and a triangular warning symbol
appears in the top right corner of the display, this in-
dicates that the mirror has become too dirty to give
accurate measurements. You will need to clean the
mirror and chamber before continuing to sample. For
more details about this symbol, please refer to Chapter
12. For cleaning instructions, refer to Chapter 10.
26
To Next Page
Loading...
