1-11. DESCRIPTION OF ELECTRO-OPTICAL TEST BENCH SET (cont)
(1) The pneumatic system (Barry controls, SERVA-LEVL Vibration Isolation System
AGL-2) consists of a pneumatic control panel and four pneumatic isolators. The
following data provides information on the individual sections of the pneumatic
(a) The pneumatic control panel is located on the front lower section of the
nightside test bench.
It is attached to a piano hinged access panel that is secured
by two panel screws.
It contains four pressure gages (0-160 psi), a filter and filter
bowl, regulator, toggle valve, and color coded 1/4 inch polyethylene tubing that con-
nects to the isolator assemblies.
(b) The E/O bench is supported by four pneumatic (stabilizing) isolators.
Each isolator contains a piston plate that rests on a rubber diaphragm. An isolator
is bolted to the van floor under each of the four corners of the base assembly. Three
of the four isolators each have a mechanically adjustable valve assembly. The air
supplied to the isolators must not exceed 125 psi.
(2) The purpose of the pneumatic system is to isolate the E/O test bench assembly
from any externally created physical disturbances during testing of LRUs containing
Three test program sets (TPS) call for use of the pneumatic system.
All other TPS use the E/O bench in a deflated mode.