ETS-Lindgren 2171B Boresight Antenna Tower - Manual (Page 48)

48 | Operation
Air Polarization Operation
Prior to using air polarization, make sure that when the antenna
polarizes that it turns freely, avoiding contact with anything
(the base, the floor, and so on).
The flow limit controls located on the air cylinder are set at the
factory. Use the flow limit controls to change the speed.
If polarization is operating at an excessive speed, the antenna
mounted to the boom could incur damage.
The automated air
polarization assembly
includes variable speed
polarization cycling using
flow limit controls. The
air cylinder is made of
non-conductive material
and will polarize the
largest antenna
recommended for the
tower. The polarization
speed range is 3
degrees to 30 degrees
per second.
An air supply of 8.6 bar to 10.0 bar (125 psi to 150 psi) is needed for this feature.
It is important to have clean and dry air; so we recommend the use of a 40
micron filter in close proximity to the motor base.
Ten meters of UV stabilized air hose is included as well as a 1/8 inch NPT fitting.
A metric fitting for a 4 mm tube may be supplied by the customer.