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BELFORT
INSTRUMENT
Proprietary Information
Visibility Ambient Light Sensor (ALS)
Note: The Ambient Light Sensor is an integrated part of the Visibility Sensor. If the
Ambient Light sensor is bad, the Visibility Sensor may also be reported as bad. If the
Visibility Sensor is removed from service, the ALS must also be removed with it at the
same time.
1.
If the Visibility ALS Sensor indicator is present, the Visibility ALS Sensor is bad or the
Visibility Sensor is bad. A failure in the Visibility sensor can cause the ALS to be reported
as bad.
2.
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.
3.
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.
4.
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.
5.
Clean the glass window on the ALS sensor with a clean soft cloth and commercial window
cleaner.
6.
If the sensor returns to service, perform the 6000 Visibility Sensor- Tri-Annual
Maintenance…Instructions detailed in section 5.4 of this manual.
7.
If the fault cannot be rectified, power down the Power Enclosure.
8.
Remove the Visibility Sensor power and signal cables from the Power Enclosure.
9.
Return the visibility sensor with ALS for repair or replacement and return the Belfort
AWOS system into service without the visibility sensor.
10.
Power up the Power Enclosure.
11.
The Visibility and ALS Sensor will be reported by the system as ‘Not Available” until the
replacement sensors is installed.
12.
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.
13.
If a system component has been determined to be faulty or suspect bad, go to Section 5.10
and follow those instructions.
14.
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.
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 ...