DH Instruments ADCS-601, Operation And Maintenance Manual

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ADCS-601™ OPERATION AND MAINTENANCE MANUAL
© 2005 DH Instruments, Inc. Page 120
When this step is complete, the AMH mass handler is ready to be installed on the PG7000 Platform.
To avoid possible damage to the AMH automated mass handler, always perform the
initial start/verification procedure described in and BEFORE attempting to install
AMH on the PG7000 Platform. Failing to do so, may result in attempting to install AMH
with mass selection columns or pins in the incorrect position, which can damage the AMH
mass handler and/or masses.
Do not operate the AMH with drive pressure lower than 275 kPa (40 psi). Damage to the
AMH could result.
Lift the AMH-38 onto the PG7601 Platform : Check that the O-ring on the bottom
surface of the AMH-38 vacuum chamber is well seated. Using the handles on the side of
the AMH-38 vacuum chamber, lift the AMH-38 above the PG7601 Platform and masses.
Center it over the mass load and gently lower it down until the bottom circumference of
the AMH-38 vacuum chamber contacts the PG7601 vacuum plate. Check that the
vacuum chamber is well aligned on the vacuum plate.
Rotate the chamber to align its KF40 connection with the mating connection on the bench.
Make the KF40 connection by installing the KF40 centering ring assembly and flange.
Install the mass lifting shaft : Slip the threaded end of the shaft down through the 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-38 accessories to tighten the assembly until you feel the
mass start to rotate.
It is imperative that the mass loading shaft be fully threaded into the binary mass tray.
Be sure to use the T handled 3 mm allen wrench to tighten the shaft to the end of the
threads applying sufficient torque to cause the mass load to rotate. Failure to fully
screw in the shaft will cause misalignment between the mass handler and the mass load
that may cause damage to the AMH-38 mass handler when operated.
Install the bell jar : Install the PG7601 Pyrex® bell jar over the upper portion of the AMH
mass handler.
Reinstall the reference vacuum DCG assembly : If the CDG assembly has been
removed, reinstall it at the KF40 connection on the AMH vacuum chamber.
Resume normal ADCS-601 operation : Press [ESC] on the PG7601 until its main run
screen appears.
Press [PAUSE] on the ADCS Main Tool Bar (see Section 4.3.3) to resume normal ADCS-601
system operation.
Do not operate AMH-38 when using a PG7601 in “absolute by vacuum” mode without
having a vacuum supply connected to AMH-38. Always check that AMH-38 is supplied
with vacuum before establishing reference vacuum in the AMH-38 vacuum chamber.
NEVER plug the AMH drive vacuum port. Failure to do so may result in damage to the
binary mass pins and/or binary masses.