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BELFORT
INSTRUMENT
Proprietary Information
1. At the DATU display terminal, issue a NOTAM advisory to alert users that the Belfort
AWOS system is being serviced prior to beginning investigation of this fault. The NOTAM
to be issued is
"Belfort AWOS system being serviced, do not use current weather data
outputs."
Verify that this NOTAM advisory is displayed on the operator screen prior to
beginning this maintenance tasks. Refer to the "Belfort AWOS Operator Manual" for
instructions on how to enter and delete NOTAMs.
2. Remove battery terminal cable connections from the battery (disconnect the negative cable
first) and clean with a terminal cleaning brush.
3. If a serviceable lead acid battery is in use, check fluid levels and top up with distilled water
per battery manufacturer’s instructions.
4. Check the battery voltage. A fully charged battery should have an open circuit voltage of
12.2VDC to 13.25VDC.
5. If battery voltage checks lower than 11.2v, replace the battery with a Group 27 deep
discharge lead acid battery.
6. Reconnect the positive battery cable first to the positive terminal of the battery and then
reconnect the negative cable.
7. Check the battery voltage with the tower load. A fully charged battery should have a loaded
voltage of >12VDC. If the voltage is <11.8vdc, suspect the charging circuit in the DCP is
faulty, the battery is bad or system has not run enough to charge the battery.
8. Allow the system to run for a minimum of 3 hours and then put the system in the service
mode by toggling the “ALERT MESSAGE” toggle switch located on the lower half of the
hinged tower section six (6) times.
9. Remove AC power from the system by turning off the AC circuit breaker in the power
junction box.
10. At the DATU display terminal verify that the Battery condition error flag has not been set.
11. If the error flag is still set, contact Belfort Instrument Co. for additional troubleshooting
suggestions to isolate the problem.
12. When the problem has been verified as corrected, return the system to service by toggling
the “ALERT MESSAGE” switch on the tower 4 times to return the unit to service.
Document corrective actions taken on the FAA Form 6030-1.
13. If a system component has been determined to be faulty or suspect bad, go to Section 5.10
and follow those instructions. Else, 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.
Transmission Delay – Error flag is set whenever the DCP is unable to transmit via the RF link, any
information for 20 seconds or more. It will clear after the next transmission but will be reset and
reported each time the delay condition occurs. This may be due to RF channel traffic or DCP
transceiver problems. If the condition is recurrent but intermittent and the data transmission rate
supports “current data” requirements (current data is always reported on the system), no action is
necessary. If current data is not appearing on the system outputs, replace the DCP or return to the
factory for diagnosis and repair.
Содержание AWOS
Страница 17: ... 14 BELFORT INSTRUMENT Proprietary Information Figure 2a Securing the Tower for Maintenance ...
Страница 49: ... 46 BELFORT INSTRUMENT Proprietary Information Figure 9 Temperature Humidity Sensor Removal ...
Страница 51: ... 48 BELFORT INSTRUMENT Proprietary Information Figure 10 Visibility Sensor Removal ...
Страница 60: ...BELFORT INSTRUMENT Proprietary Information Appendix A Belfort AWOS Maintenance Forms ...
Страница 66: ...BELFORT INSTRUMENT Proprietary Information This page intentionally left blank ...
Страница 71: ...BELFORT INSTRUMENT Proprietary Information Appendix B Belfort AWOS Tri Annual Annual 5 Year Maintenance Plan ...
Страница 74: ...BELFORT INSTRUMENT Proprietary Information Appendix C UHF Transceiver Specifications ...
Страница 76: ...BELFORT INSTRUMENT Proprietary Information Appendix D Standard Unicom Radio ICOM A110 VHF Radio Specifications ...
Страница 88: ...BELFORT INSTRUMENT Proprietary Information Appendix F DCP Site Configuration Procedure ...
Страница 93: ...BELFORT INSTRUMENT Proprietary Information Appendix G Belfort AWOS Atomic Clock Verification Procedure ...