3. OPERATION
Install the mass lifting shaft:
Slip the threaded end of the shaft down through
hole in the center of the mass lifter. Thread the shaft into the binary mass
carrier by holding and rotating the trim mass tray. NOTE THAT SHAFT HAS A
LEFT HAND THREAD SO IT MUST BE ROTATED COUNTER-CLOCKWISE
TO TIGHTEN IT. Use the 3 mm allen wrench supplied in the AMH-100
accessories to tighten the assembly until you feel the masses begin to rotate.
Be sure that the mass lifting shaft is fully threaded into the binary
mass carrier. Thread it by hand, then tighten it using the allen wrench
supplied with the AMH-100 until you feel the masses rotate. If the
mass lifting shaft is not fully threaded, the mass will not align properly
with the AMH mass handling columns and pins and damage may result.
The PG7000 with AMH-100 is now ready to operate (see Section 3).
3.2.2
REMOVING THE AMH MASS HANDLER FROM THE
PG7000 PLATFORM
3.2.2.1
REMOVING AMH-38
To remove the AMH-38 mass handler from the PG7601 platform, proceed as
follows (see Figure 9).
Load all the mass:
Use
[SPECIAL]
,
<8AMH>
,
<2control>
,
<3loadall>
to
load all the masses of the AMH mass set. This assures that no masses are
retained in the AMH so it will be able to be lifted off the platform freely.
Open the vacuum chamber and bell jar to atmospheric pressure:
Check that the vacuum chamber and bell jar are open to atmosphere. It is
not possible to remove the AMH with internal pressure less than
atmospheric pressure.
Remove the bell jar:
Remove the PG7601 Pyrex® bell jar and set aside. If
the KF-40 connection on the side of the AMH vacuum chamber is being
used for the vacuum reference, consider disconnecting it before lifting the
AMH off the platform.
Remove the mass lifting shaft:
Use the 3 mm allen wrench supplied in the
AMH-38 accessories to loosen and unscrew the shaft. NOTE THAT
SHAFT HAS A LEFT HAND THREAD SO IT MUST BE ROTATED
CLOCKWISE TO LOOSEN IT. Slip the shaft up and out of the mass
handler.
Lift the AMH-38 off of the PG7601 platform:
Using the handles on the
side of the AMH-38 vacuum chamber, lift the AMH-38 straight up until it
clears the masses and set it on a flat surface. The AMH-38 mass handler
weighs about 18 kg (40 lb.).
3.2.2.2
REMOVING AMH-100
To remove the AMH-100 mass handler from the PG7000 Platform, proceed as
follows (see Figure 9).
Load all the mass:
Use
[SPECIAL]
,
<8AMH>
,
<2control>
,
<3loadall>
to
load all the masses of the AMH mass set. This assures that no masses are
retained in the AMH so it will be able to be lifted off the platform freely.
Loosen the mass handler column set screws:
Loosen the set screws that
are across from the AMH mass selection columns on the PG7000 Platform
Page 25
© 2007 DH Instruments, a Fluke Company
