Discovery TGA™ Getting Started Guide
Page 47
b
Manually position the balance assembly left or right until the hang-down wire is centered in the
purge cap at the top and in the sample tube at the bottom.
c
Tighten the screws to lock them in position.
Aligning the Bottom of the Sample Hang-Down Wire
The purpose of this procedure is to center the sample pan within the furnace so that its movement is not
hindered as the furnace is opened and closed.
1
Use the user interface
Furnace Open/Close
button to slowly raise the furnace just to the bottom of the
sample pan, and touch
STOP
.
2
Check the alignment of the sample pan within the furnace. It should hang freely, centered, and should
not be touching the sides of the furnace (shown in the figure here).
Figure 33
3
If the sample pan is not centered and hanging freely within the furnace, level the instrument by adjusting
the two front feet on the bottom. Turn the feet clockwise to lengthen or counterclockwise to shorten the
legs, making sure the front feet and the rear stabilizer bar contact the table securely. Continue adjusting
until the pan hangs correctly.
4
Use a 7/16-inch wrench to tighten the locking nuts up against the bottom of the cabinet when the
instrument is level to fix the position of the mounting feet in place. See the figure below.
Figure 34
Locking nut position shown.
5
Raise the furnace slowly again to ensure the sample tube baffles clear the furnace. If the baffles come
in contact with the furnace, call TA Instruments for service.
6
Lower the furnace, then manually remove the pan and place it back on the Autosampler tray.
At this point, the lower furnace assembly is ready to be installed. Proceed to the next section.
Furnace
Sample pan
Locking nut
Mounting foot
