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Section 4.3 Chapter 4
Installing a Sample VSM Oven Measurements
4-4
VSM Oven Option User’s Manual, Rev. A3 Quantum Design
May 2011
Figure 4-3. VSM Install wizard, page 4 (oven mode): Sample-holder coordinates for
center position
Note that there are slight differences between the dialog boxes used for the VSM Oven mode
and the standard VSM mode: for standard VSM mode, the illustration shows a sample
holder, but for the VSM Oven, it shows a heater stick with a zigzag pattern that represents
the heater region.
As in the case of the standard VSM sample holder, we recommend that you place the sample
at a sample offset of 35 mm. The software will warn you if the sample is placed outside the
heater region. The heater region includes sample offsets from 23 mm to 48 mm.
7. Click on the
Scan for Sample Offset
button if the sample signal is large enough to be
detected, typically more than 10
-5
emu. You may need to apply a magnetic field in order to
create a magnetic moment. Click on
Enter Offset Manually
if you measured the offset
while in the mounting platform.
8. Click on the
Next >>
button at the bottom of the dialog box. This button accepts the sample-
offset value.
9. Click on the
Close Chamber
button, which is just below the
Instructions
area.
10. The
Instructions
area will indicate that a touchdown is being performed and it will report on
the process as it takes place.
11. The software will then test the heater stick by measuring the resistance of the heater and
thermistor and testing for continuity of the thermocouple. If all these tests succeed, this will
be indicated (Figure 4-4), otherwise you must go back to the sample insertion page and check
the electrical connections to the sample rod or use a different heater stick.
Figure 4-4. VSM install wizard, page 5: testing the heater stick.