Newport IPV, Installation Manual

Page: 42 / 65

3
Table Placement
To ensure optimal performance from your Vibration Control System, it
should be located on a level surface. Uneven floors may cause difficulty
during the leveling of the table top if their irregularity is outside of the
adjustment range of the isolators.
The Stabilizer™ isolator must be mounted so that its axis is not more than
0.5 degrees from vertical. This is necessary for the isolator to function
properly in the horizontal mode. Note: 0.5 degrees is equal to 0.09 (2.2 mm)
inches in 10.0 inches which is the isolator base diameter. A typical spirit
level will easily measure 0.5 degrees and can be used to check the vertical
alignment of each isolator.
If the floor where the isolators are being mounted has a depression of more
than 0.09 inches under one side of the base, then the floor should be
grouted or shimmed level at this location.
If the system is not located on the ground floor of the building, it should be
located near primary vertical structures such as exterior walls or support
columns. By locating the table near these structures, the effects of low
frequency floor motion will be minimized, thus increasing the performance
of the table. It is also advisable to avoid locations adjacent to major
sources of vibration from operating machinery such as elevators, air
conditioning plants, or factory equipment.
Warning
The table top is attached to the isolators with clamps and hex head
bolts. In the event of an earthquake, the table may collapse. For
areas susceptible to earthquakes, we recommend that Newport
Earthquake Restraints be installed on each Vibration Control
System.
The table top is a metallic electrical conductor. For installations
where electrical shock is a possibility, the table top should be
grounded to prevent personal injury.
A constant supply of air must be connected to the Vibration Control System
during operation. After initial setup and filling, the isolators consume air
only when the leveling valves adjust the pressure to compensate for
changes in the load on the table.
Bottled nitrogen or mechanically compressed air may be used. The
required pressure is determined by dividing the total load, including table
weight, by the total isolator diaphragm area (25.9 in
2
per isolator) plus
5-10 psig.
For example, if the table plus load is 2850 pounds and will be mounted on 4
isolators, the required pressure is:
2850
4 25 9
10 33 8
lbs
in
psig psig
2
×
+ =
.
.
Note that the maximum operating pressure for the system is 100 psig
(7.0 kg/cm
2
).
The Newport Model ACMP air compressor is an extremely quiet source of
clean, pressure regulated air. If another compressor or plant air is used,
1.5
Air Supply
Requirements
1.6