Metrohm 885 Compact Oven SC - Manual (Page 11)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
885 Compact Oven SC ￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 Instrument description
The 885 Compact Oven SC is used whenever the heating up of a sample
and/or the thermal expulsion of moisture in solids or liquids is required. In
combination with a coulometric or volumetric KF titrator, the 885 Com-
pact Oven SC is the ideal analysis system for water determination in sam-
ples 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.
Thanks to the combination of a sample changer with an oven module,
automated processing of several samples in a single sample series is possi-
ble. This ensures that only the smallest possible amount of work is
required.
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 according to Karl Fischer.
1.1.1 Instrument components
The 885 Compact Oven SC has the following components:
￭ Turntable
Permanently mounted sample rack with 17 positions for sample vials
and 1 position for a conditioning vessel.
￭ Lift with working head
Working head with needle adapter and tubing for the gas flow.
￭ 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.