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BELFORT
INSTRUMENT
Proprietary Information
1.
If either of the Altimeter or Pressure Sensor Error indicators are present, there is a sensor
problem with the pressure transducers. Either one or both of the pressure sensors are not
reporting, a value of 99.99 is the reported altimeter setting or the individual pressure
sensors values have deviated > .04 inhg from each other.
3.
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.
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.
Perform the DCP – Annual Barometric Pressure Maintenance & Calibration procedure
detailed in Section 5.2 of this manual. If this returns the sensor to service, then go to step
8.
7.
If this does not return the unit to service, remove and return the DCP to the factory for
service.
8.
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.
9.
If a system component has been determined to be faulty or suspect bad, go to Section 5.10
and follow those instructions.
10.
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.
Temperature / Humidity Indicators
1.
If either of the Temperature /Humidity Error indicators are present, there is a problem with
the Temperature /Humidity Dew Point sensor. Either the sensor is not responding, or the
sensor is reporting temperature value outside of the operating range of the sensor or
humidity value outside of the operating range of the sensor.
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
Summary of Contents for AWOS
Page 17: ... 14 BELFORT INSTRUMENT Proprietary Information Figure 2a Securing the Tower for Maintenance ...
Page 49: ... 46 BELFORT INSTRUMENT Proprietary Information Figure 9 Temperature Humidity Sensor Removal ...
Page 51: ... 48 BELFORT INSTRUMENT Proprietary Information Figure 10 Visibility Sensor Removal ...
Page 60: ...BELFORT INSTRUMENT Proprietary Information Appendix A Belfort AWOS Maintenance Forms ...
Page 66: ...BELFORT INSTRUMENT Proprietary Information This page intentionally left blank ...
Page 74: ...BELFORT INSTRUMENT Proprietary Information Appendix C UHF Transceiver Specifications ...
Page 88: ...BELFORT INSTRUMENT Proprietary Information Appendix F DCP Site Configuration Procedure ...
