Operation - Bartington MS2 Operation Manual

Key to Figure 20
1. Crucible (silica tube containing heating element)
2. Thermocouple
3. Thermocouple selector switch
4. Digital multimeter (buttons have no function)
5. Retort stand to hold MS2W sensor
This furnace has been specially designed for use with the water-jacketed MS2W probe to
facilitate susceptibility/temperature measurements up to 850
It comprises a non-inductively wound platinum wire furnace, with a maximum operating
temperature of 900 C and a maximum sample capacity of 15mm diameter. The furnace is
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mounted on a substantial metal base which contains serial interface circuitry and a digital
panel meter (DPM). Temperature information is obtained from either the internal type 'S'
thermocouple or an external type 'T' thermocouple. The base includes a retort stand for
mounting the MS2W sensor around the furnace (or any other experimental hardware).
Temperature information is available as a 4 digit LED display, 1 mV/
232 compatible serial data for computer interfacing. The panel meter has an RS485 interface and
this is converted to RS-232 within the furnace unit.
WARNING: The thermocouples are not electrically isolated and must not be connected to
ground potential or errors will occur.
WARNING: The outside surface of the furnace will become hot during measurements and
the interior will remain hot for a considerable time after the unit is switched off.
WARNING: The MS2WF furnace is powered by a current-limited low voltage supply.
The furnace support pillars carry the current to the furnace and should not be shorted
together.
WARNING: The black heatsink on the rear of the MS2WFP will become very hot when the
furnace is heating.

17.1. Operation

The base is fitted with a retort stand for mounting the MS2W probe and contains a digital
multimeter for temperature indication.
The MS2W probe is mounted on the retort stand such that its sample cavity fits over the crucible
on the MS2WF. The switch [3] on the side of the furnace is used to select the appropriate MS2WF
thermocouple. The GeoLab software supplied requests the operator to identify the thermocouple
in use and communicates this to the meter, which provides the appropriate scaling, cold junction
compensation and linearisation.
BARTINGTON INSTRUMENTS
Page 54 of 82
C.
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C analogue output and RS-
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OM0408/49