multi N/C pharma HT
Installation and commissioning
41
4.3
Connecting accessories
NOTICE
Risk of damage to the sensitive electronics
¡
Only connect the device and the other components to the power grid when they are
switched off.
¡
Only connect and disconnect electrical connection cables between the system com-
ponents when the system is switched off.
4.3.1
The AS 10e and AS 21hp autosamplers
AS 10e autosampler
The autosampler is equipped with a rotatable sample tray for 10 sample vessels with a
volume of 50 ml. Optionally, sample values with a volume of 40 ml can be used.
Figure 21AS 10e autosampler
The autosampler can be equipped with two canulas. This allows the autosampler to au-
tomatically purge samples for NPOC analysis.
During
NPOC analysis
, the sample is acidified outside the analyzer with diluted acid to a
pH value of <2. The autosampler purges volatile organic compounds and the produced
CO
2
from the sample by means of the carrier gas. The analyzer then determines the re-
maining organic carbon.
During NPOC analysis, the autosampler works
sequentially
:
¡
First, the autosampler purges volatile organic compounds and CO
2
from the sample.
¡
In a second step, the autosampler picks up the prepared sample and transfers it via
the intake hose to the analyzer.
AS 21hp autosampler
The autosampler is equipped with a rotatable sample tray for 21 sample vessels with a
volume of 50 ml. Optionally, sample values with a volume of 40 ml can be used.
