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use a clamp on ammeter in accordance with the ammeter manufacturer’s instructions to take current
readings off each of the three conductors (phases) connected to the load side of the azimuth drive
motor circuit breaker. Record the current draw in the equipment log and compare the readings to the
reference values entered in the installation/acceptance check off. If the readings differ by more than five
percent, refer to appropriate troubleshooting information and perform applicable corrective action. Then
take voltage readings off each of the three conductors; the readings should agree with each other—
within two percent. Turn the AZIMUTH switch to OFF.
•
Repeat preceding step with the AZIMUTH EAST/WEST switch in the alternate operating position.
•
Turn the ELEVATION DOWN/UP switch to either position and while the antenna is rotating, carefully
use a clamp on ammeter in accordance with the ammeter manufacturer’s instructions to take current
readings off each of the three conductors (phases) connected to the load side of the elevation drive
motor circuit breaker. Record the current draw in the equipment log and compare the readings to the
reference values entered in the installation/acceptance check off. If the readings differ by more than five
percent, refer to appropriate troubleshooting information and perform applicable corrective action. Then
take voltage readings off each of the three conductors; the readings should agree with each other
within two percent. Turn the ELEVATION switch to OFF.
•
Repeat preceding step with the ELEVATION DOWN/UP switch in the alternate operating position.
•
If all voltage and current readings are within tolerance, close the local control/motor drive controller
inner door and place the LOCAL/REMOTE switch in the REMOTE position to return antenna control to
the studio. Then close and lock the outer local control/motor drive controller door.
4.3 Pedestal Mount Bearing Pad Adjustment
The bearing pad (within the pedestal mount) adjustment rods/bolts require yearly adjustment as well as
verification of torque value. With the antenna at zenith (90 degrees), follow the procedure presented below:
Step 1 of 5:
Loosen jam nuts on all rods/bolts.
Step 2 of 5:
Torque the upper adjustment rod evenly to 40-45 foot pounds. Then torque the lower adjustment
rod evenly to 40-45 foot pounds.
Step 3 of 5:
Torque the upper adjustment bolt evenly to 40-45 foot pounds. Then torque the lower adjustment
bolt evenly to 40-45 foot pounds.
Step 4 of 5:
Repeat Steps 2 & 3, verifying that all adjustment rods/bolts have even torque within the specified
limits.
Step 5 of 5:
Tighten the jam nuts.
4.4 Site Acceptance Test Procedure
Once the installation procedure has been completed, and prior to turning over the system to the station facility,
some form of Site Acceptance Test procedure will need to be performed, checked off, and signed (such as
the
Kratos
Site Acceptance & Proof of Performance Document).
4.5 Preservation & Lubrication
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4.5.1 Preservation of Component Parts
When preserving and/or lubricating the component parts, refer to the following sections (
4.5.2
to
4.5.6
).
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4.5.2 Aluminum Parts
Remove all loose paint and corrosion by scraping, wire brushing, or using steel wool. If using steel wool
near the feed window, make sure that none remains on the feed horn window. Edges of existing paint can
be blended with the metal surface using fine grit sandpaper. Wipe the surface to be painted with a soft rag
dampened with a small amount of acetone or equal. Be certain to remove all loose paint, corrosion,
imbedded dirt, grease, and oil deposits or the paint will not adhere to the surface. Acetone will dissolve
