Metrohm 860 KF Thermoprep - Manual (Page 9)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
860 KF Thermoprep ￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 Instrument description
The 860 KF Thermoprep is used whenever the heating up of a sample
and/or the thermal expulsion of moisture in solid substances or liquids is
required. In combination with a coulometric or volumetric KF titrator, the
860 KF Thermoprep is the ideal analysis system for water determination in
samples that contain disruptive components or from which moisture can
be removed only with difficulty.
One of its decisive advantages is the reduction of sample preparation to a
minimum. Thanks to the use of hermetically sealed sample vessels ("head-
space vials"), the filling of the samples can be accomplished directly on-
site. The PTFE-coated septa guarantee a constant, non-falsified water con-
tent, even after prolonged holding times.
The sample heated in the oven module releases its moisture in the form of
water vapor, which is conveyed into a measuring cell with the aid of a gas
flow. An air pump is installed for the purpose of generating the gas flow.
An inlet valve is available for nitrogen or other inert gases. The determina-
tion of the moisture can be accomplished in the measuring cell either cou-
lometrically or volumetrically in accordance with Karl Fischer.
1.1.1 Instrument components
The 860 KF Thermoprep 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 heating
Heating tube for preventing the condensation of moisture.
￭ Stand rods
Guidance device with needle adapter and tubing for the gas flow.
￭ Operating unit
Monochrome LCD display and keyboard.