AMH-38™ AND AMH-100™ OPERATION AND MAINTENANCE MANUAL
4.
Binary mass tube selection pins(3):
The binary mass selection pins are used to retain the
binary mass tubes that are not to be loaded onto the piston. Three pins for each mass are
located in a circular pattern around the top of each mass. The pins are pneumatically actuated
and double acting. Two three-way solenoid valves(e.g. 9) control drive pressure to each set of
three pins. One valve admits pressure to one side of the pin to extend it and the other admits
pressure to the other side of the pin to retract it. Once the pins have been moved, the pressure is
exhausted; the exhaust is to vacuum when there is vacuum in the vacuum chamber of AMH-38.
When the mass load is lifted to the mass selection position, the pins are operated to retain the
binary masses that are not to be loaded. The rest of the binary masses are free and are placed
onto the piston when the lifting assembly descends.
Do not put your fingers or anything else beneath the AMH trim mass tray. AMH may lower up
to 100 kg (220 lbs) onto anything that is under the trim mass tray. This could cause
damage and/or injury.
© 2007 DH Instruments, a Fluke Company
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