Metrohm 874 USB Oven Sample Processor - Manual (Page 10)

1.1 Instrument description ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2 ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor
1.1.2 Instrument components
The 874 Oven Sample Processor has the following components:
￭ Oven
Oven module made of aluminum with software-operated temperature
control for heating the sample vessel.
￭ Fan
Propeller fan for cooling the oven module.
￭ Inlet valve
Valve for switching over the source of the gas flow.
￭ Air pump
Pump for generating the gas flow.
￭ Outlet heater
Heating tube for preventing the condensation of moisture.
￭ Lift with rods
Guidance device with needle adapter and tubing for the gas flow.
￭ Turntable
For the standard sample rack with a capacity of 36 sample vials (6 mL)
or the special sample rack with a capacity of 25 sample vials (
⌀ = 16 ...
32 mm).
1.1.3 Intended use
The 874 Oven Sample Processor is designed for usage as an auxiliary
device for sample preparation in analytical laboratories. Its main area of
application is the moisture determination according to Karl Fischer (coulo-
metric or volumetric). The 874 Oven Sample Processor enables the appli-
cation of thermal gas extraction technique.
The present instrument is suitable for processing chemicals and flammable
samples. The usage of the 874 Oven Sample Processor therefore requires
that the user has basic knowledge and experience in the handling of toxic
and caustic substances. Knowledge with respect to the application of the
fire prevention measures prescribed for laboratories is also mandatory.