Newport IPV, Руководство по установке

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Section 4
Troubleshooting
Use the following procedure if the table top does not float, or lift up, when
pressure is applied to the isolators.
A. Ensure that the supply pressure is 5–10 psig (0.4–0.7kg/cm 2 ) above the
pressure reading of any of the leveling valves. If the load is increased,
the pressure should be increased to maintain the difference between
supply and valve pressure. Refer to Section 1.6.
B. Check to see if all air lines are connected properly and the supply
pressure is adequate (see step A). Refer to Figures 2.8, 2.9, and 2.10.
C. Be sure that the needle valves are not closed completely.
D. Check each leveling valve for clogging. To do this, press the control
arm down. Air should flow into the isolator, accompanied by the
familiar sound of moving air. Repair or replace any clogged valve.
Use the ARF filter/regulator to prevent this situation.
The following may lead to poor isolation performance of your system.
A. Vibration may be transmitted to the table through direct physical
contact of equipment with external sources of vibration.
B. Isolators that float too high, too low, or are not centered may conduct
floor vibration to the table top. Refer to Section 2.2. Centered isolators
will remain centered unless the table and isolators are moved relative
to each other.
C. Equipment on the table may be vibrating at a resonant frequency of
other components. Improve the rigidity of the mounting for that
equipment or remove that item from the table.
D. Air currents or pressure fluctuations may be disturbing components
on the table. This is easily corrected by using one of the Newport
Table Enclosures. Refer to Section 1.8 for sizes and part numbers.
E. Non-level floor may prevent the horizontal isolation system from
functioning properly (see Section 1.5).
If the table top oscillates or “hunts”, you may have a set up with a high
center of mass. Refer to the information in Section 3.2 or consult your
Newport representative or Newport Corporation for further assistance at
(714) 863-3144.
All Newport isolators and valves are pressure leak tested prior to shipment.
Check all tubing connections for leaks with soapy water. Tubing that is
crushed out of round or that is not cut squarely may not seal in the push-in
fittings. Use a single edge razor blade to cut the tubing cleanly (refer to
Section 2.3.2). If testing with soapy water indicates that either the isolator
or valve are leaking contact Newport Customer Service at (714) 863-3144.
Table Top Does Not
Float
4.1
Table Top Oscillates
4.3
System Leaks Air
Constantly
4.4
Poor Isolation
Performance
4.2