Belfort AWOS, Руководство по обслуживанию

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BELFORT
INSTRUMENT
Proprietary Information
4. Put the Belfort AWOS in “service mode” by toggling the “ALERT MESSAGE” toggle
switch located on the lower half of the hinged tower section six (6) times.
5. Remove tower-securing bolts and tilt the tower until the cross arm is at a comfortable
working height to access the wind Speed sensor. Secure the tower in that position by tying
the attached tower hold down rope to the base of the Belfort AWOS tower as shown in
Figure 2.
6. Clean the glass windows on both sides of the visibility sensor with a clean soft cloth and
commercial window cleaner.
7. Power down the power enclosure.
8. Remove the DCP from the tower and disconnect all cables at the back of the DCP.
9. Inspect DCP and cable connectors for damage, pushed in pins, broken contacts and
evidence of corrosion. Repair or replace damaged or corroded cables as required.
10. Clean and lubricate DCP connectors and mating cable connectors with Dow Corning #4 to
prevent corrosion. Reconnect cables to the back of the DCP and reinstall the DCP onto the
tower.
11. Power up the power enclosure.
12. Using a DMM, check for 115VAC on the input terminals of the +12v Power supply. If the
115VAC is present, then go to step 10. If 115VAC is not present on the power supply
inputs, check for 115VAC at the input side of the circuit breaker. If the 115VAC is present
at the input of the circuit breaker, then the circuit breaker may have tripped due to short on
the lines to the input of the power supply. Use the DMM set to ohms, check for short on
the AC input lines to the power supplies. If the input line is shorted, remove ac feed wires
to the power supplies one supply at a time. If short goes away with removal of power
supply feed lines, then replace suspect power supply. If no AC short is found, then suspect
the circuit breaker is faulty. Replace the circuit breaker.
13. Using a DMM, check the 12VDC output from the power supply. If the +12VDC output is
not present, then replace the power supply.
14. If the sensor returns to service, perform the 6000 Visibility Sensor- Tri-Annual
Maintenance…Instructions detailed in section 5.4 of this manual.
15. If the fault cannot be rectified, and 12VDC is available to the sensor, return the visibility
sensor for repair or replacement and return the Belfort AWOS system into service without
the visibility sensor.
16. The Visibility and ALS Sensor will be reported by the system as ‘Not Available” until the
replacement sensors is installed.
17. Untie the rope and SLOWLY erect the tower to the vertical position and secure it by
installing and tighten-up (DO NOT OVER TIGHTEN) the three (3) tower-securing bolts.
NOTE: Be careful to avoid pinching the wires on the inside of the hinged Tower Section
when raising the tower.
18. If a system component has been determined to be faulty or suspect bad, go to Section 5.10
and follow those instructions.
19. At the DATU display operator’s terminal, when all maintenance actions are complete, issue
another NOTAM advising users that “
Belfort AWOS maintenance activities were
completed, system has been returned to normal operation.
” The expiration date and
time of this NOTAM should coincide with the same expiration date and time of the
previous advisory NOTAM that was issued to put the system in the maintenance mode.
Verify that this NOTAM advisory is correctly displayed on the operator screen. Refer to
the
"Belfort AWOS Operator Manual" for instructions on how to enter and delete
NOTAMs.