6
Humidity
Control
Chamber
Figure 1-4)
The chamber encloses the filament block assembly to provide a controlled
environment in which to pull the glass. Access holes in the side of the
chamber allow the glass to be loaded into position. The chamber must be
removed to access the heating filament. To remove, unscrew the
thumbscrew on the front plate of the chamber, remove the front plate, and
then pull the chamber towards you.
Figure 1-4. Filament Block Assembly.
Filament
Block
Assembly
(Figure 1-4)
The filament block assembly is made up of several pieces of hard black
nylon. Wires supplying current to the filament are attached to threaded
‘posts’. This current is carried to the filament via the upper and lower Brass
Jaws. Note that these jaws may be moved up and down by loosening the
screws (D) that secure them to the front of the filament block assembly.
When changing the filament type from trough to box (or vice versa), the
jaws must be moved up or down so that the filament is positioned at the
correct level relative to the glass. If the jaws are repositioned and/or the
filament type has been changed, make sure that the securing screws of the
jaws and filament clamp are again tightened. Failure to tighten these screws
can result in poor current flow for scorching and insufficient heat to melt
the glass. Please refer to Filament Replacement in the Maintenance chapter
for additional instructions.
Eccentrics
and Angle
Plate
(Figure 1-4)
The Angle Plate secures the Filament Block Assembly to the Cover Plate; it
contains two eccentric adjustments. The two chrome-plated screws A and B
are the eccentrics, and A’ and B’ are the corresponding locking screws. By
turning the eccentrics with a screwdriver the Filament Block Assembly can
be moved up and down (A) or forward and back (B) to adjust the position of
the filament. Loosen the locking screw associated with each ‘eccentric screw’
before turning, and tighten after completing the adjustment. Note:
Changing the eccentrics should be made only for fine/small adjustments.
P-97 FLAMING/BROWN MICROPIPETTE PULLER OPERATION MANUAL – REV. 2.43 - DOM (20161118)
Summary of Contents for P-97
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