Metrohm 940 Professional IC Vario ONE/HPG - Manual (Page 10)

1.1 Instrument description
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940 Professional IC Vario ONE/HPG (2.940.1140)
Column thermostat
The column thermostat regulates the temperature for the separation col-
umns and the eluent, thereby providing stable measuring conditions. The
interior of the column thermostat can be heated and cooled. There are
two column holders with chip readers in the column thermostat.
Eluent degasser
The eluent degasser removes gas bubbles and dissolved gases from the
eluent.
High-pressure pump
The intelligent and low-pulsation high-pressure pump pumps the eluent
through the system. It is equipped with a chip where its technical specifi-
cations and "life history" (operating hours, service data, etc.) are saved.
Inline filter
Inline filters protect the separation column reliably from potential contami-
nation from the eluent. The small filter pads with 2 µm pore size can be
replaced quickly and easily. They remove particles from the solutions, such
as bacteria and algae.
Pulsation absorber
The pulsation absorber protects the separation column from damage
caused by pressure fluctuations when switching the injection valve, and
reduces interfering pulsations during highly sensitive measurements.
Injection valve
The injection valve connects the eluent path to the sample path. By a
quick and precise switching of the valve a quantity of sample solution
defined by the size of the sample loop is injected and flushed to the sepa-
ration column with the eluent.
Detector
Metrohm offers a series of different detectors for various analysis tasks. A
suitable detector type must be ordered as a separate accessory.
Sample degasser
The sample degasser removes gas bubbles and dissolved gases from the
sample.
High-pressure gradient module (HPG)
The second high-pressure pump in the instrument allows a gradient to be
created from two eluents. The software is used to control the amount of
eluent.