DH Instruments ADCS-601, Operation And Maintenance Manual

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ADCS-601™ OPERATION AND MAINTENANCE MANUAL
© 2005 DH Instruments, Inc. Page 118
6.5 PG7601, REMOVE AND REINSTALL THE AUTOMATED MASS
HANDLER AND MASS SET
To access the PG7601 piston-cylinder or platform, it is necessary to remove the automated mass handler
(AMH) and mass set (see Section 6.5).
6.5.1 THE MASS HANDLER (AMH)
When installing the mass set and AMH, start by loading the masses (see Section 6.5.2).
To install the AMH-38 mass handler, see below in this section.
REMOVING THE AMH-38 AUTOMATED MASS HANDLER
To remove the AMH-38 mass handler from the PG7601 Platform, proceed as follows (see
Figure 50).
Prepare the ADCS-601 system for local operation of PG7601 and access to the
mass set:
Put the ADCS-601 system into gauge measurement mode (see Section 4.2.3).
Vent the ADCS-601 system by pressing the [VENT] button on the ADCS Run Screen
Toolbar . Wait for the operation to complete.
Press the [Pause] button on the ADCS Main Tool Bar to suspend remote
communication within the ADCS-601 system.
Press [ESC] on the PG7000 Terminal to gain local access.
Load all the mass: Use [SPECIAL] , <8AMH> , <2control> , <3loadall> on the PG7000
Terminal 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.
Remove the PG7601 bell jar and disconnect the vacuum connection from the AMH
vacuum chamber: Remove the Pyrex® bell jar and set aside. Remove the flange from the
KF-40 connection on the right side of the AMH vacuum chamber and break the connection
so that the AMH vacuum chamber will be able to lift off the PG7601 Platform. The PG7601’s
external CDG may be removed from the vacuum chamber as well if desired (see Section
7.2.6).
Remove the AMH 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.). The AMH-38 may be
placed on top of the Control Cabinet.
To access the PG7601 piston-cylinder and/or platform, remove the mass set (see
Section 6.5.2).