Belfort AWOS Maintenance Manual Download Page 55

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BELFORT

INSTRUMENT

Proprietary Information

15.

When the pointer is properly aligned, use the small screw driver to loosen the set screws
on the vane shaft. Remove the vane.

16.

Position the new vane on the direction shaft and tighten the set screws.

17.

Use the rubber band to secure the vane as shown in Figure 4.

18.

Go to step 11 of this procedure and follow instructions.

Figure 12

Wind Direction Sensor Removal

Summary of Contents for AWOS

Page 1: ...NT Co 800 937 2353 www Belfortinstrument com Belfort Automated Weather Observing System AWOS Maintenance Manual Proprietary Prepared in Response to the FAA Automated Weather Observing System AWOS Requirements Aug 2014 ...

Page 2: ...and Calibration Procedure 18 5 5 Wind Speed Sensor Annual Verification Procedure 22 5 6 Wind Direction Sensor Annual Maintenance Verification 23 5 7 Lightning Protection System Battery Tower Tri Annual Maintenance 26 5 8 The UHF Transceiver Annual Maintenance 27 5 9 The VHF Unicom Radio Annual Maintenance 27 5 10 Belfort AWOS System Component Failure 28 6 0 Troubleshooting the System 29 6 1 System...

Page 3: ...Figure 3a Scatter Plate Attachment Detail 19 Figure 3b Tower with Visibility Scatter Plate Attached 19 Figure 3c Installation of Opaque Filters on Transmitter Hood 20 Figure 4 Wind Direction Vane Alignment 24 Figure 5 Typical Battery Terminal Bruch 26 Figure 6 Belfort AWOS Alert Messages 30 Figure 7 Advisor Current Status Page 30 Figure 8 DCP Removal 44 Figure 9 Temperature Humidity Sensor Removal...

Page 4: ...ective components and instructions for the removal and replacement of defective system components 1 4 PERIODIC MAINTENANCE Equipment system components that require periodic maintenance and maintenance frequencies are identified in this manual Forms to be used to document completion of maintenance tasks system calibration and adjustments are provided in Appendix A of this manual These forms can als...

Page 5: ...UMENT Proprietary Information 1 6 WARRANTY SUPPORT For warranty support contact Belfort Instrument Co customer support at 1 800 937 2353 When calling please have the Belfort AWOS TM location and serial number available ...

Page 6: ...escription Document The VDD may also be located in the FRDF 2 2 LIST OF ACRONYMS AC Alternating Current AVG Average ALS Ambient Light Sensor AWOS Automated Weather Observing System BIT Built In Test CTAF Common Traffic Advisory Frequency DATU Data Acquisition Terminal Unit DC Direct Current DCP Data Collection Processor DDR Digital Data Receiver DMM Digital Multi meter DSL Digital Subscriber Line ...

Page 7: ...MM Operations and Maintenance Manual RAF Regional Airway Facilities REL HUM Relative Humidity RIF Radio Interface RPM Revolutions Per Minute T1 T carrier 1 digital transmission line 1 544 Mbps 24 voice channels UHF Ultra High Frequency UNICOM Universal Integrated Communications System VAC Volts Alternating Current VDC Volts Direct Current VDD Version Description Document Belfort AWOS Configuration...

Page 8: ...nsor information is transmitted from the DCP If the self test detects a problem the suspected sensor or function is identified in the system status log with an error flag When routine maintenance tasks and adjustments are not adequate to correct system errors or problems defective components must be replaced Site maintenance personnel must not attempt to repair defective system LRU components Figu...

Page 9: ... the following observations at a minimum 1 Visual inspection of the tower for obvious defects such as chipped paint evidence of corrosion on the tower or sensor enclosures or mounting structures loose or broken hardware or electrical connections and any other unsafe conditions that could affect the reliability of the system Including an observation that the obstruction lighting is operational Any ...

Page 10: ...an is not operating or is making unusual noise contact Belfort to arrange for computer replacement or factory repair 3a Check PC Clock for accurate time and Atomic Clock operation If the time is not accurate then perform the Atomic clock verification procedure in Appendix G Then reset the Windows clock through the windows control panel to the correct time 3b Download and install any Windows Update...

Page 11: ...select the Return Button then access the System Status page again for updated status At any time the maintenance technician can view the most recently received Status Information displayed in a user friendly format The maintenance technician can also view the Status Change History for past or recurrent problems View the Status Pages past history by selecting Status Pages from the History menu entr...

Page 12: ...grams 2 Empty the Recycle bin 3 Click on the Start button 4 Click on My Computer 5 Right click on Local Disk C 6 Select Properties 7 Select the Tools tab 8 Select and click on the Disk Cleanup button to perform that function 9 Click on the Defragment Now button 10 Note the Free Space If Free Space is less than 15 or 3G notify Belfort Instrument Company for support 11 Click the Defragment button 12...

Page 13: ...uration Validation Performance and Maintenance Record 4 Contact the Belfort Factory Customer Service for the current released versions information and the software if needed 5 If the current installed versions of software are not the current released FAA approved versions of software then the system should be updated with the newest released versions 6 Add an entry in the Facility Maintenance Log ...

Page 14: ...ued 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 Instructions for issuing and deleting NOTAMs are provided in the Belfort AWOS Operator Manual 2 At the tower toggle the ALERT MESSAGE toggle switch located on the lower half of the hinged tower section refer ...

Page 15: ...er in that position by tying the rope to the base of the Belfort AWOS tower Figure 2 a illustrates the height locations where the various Belfort AWOS sensors and other system components are located on the tower Figure 2 b illustrates the tower as typically secured for maintenance ...

Page 16: ... 13 BELFORT INSTRUMENT Proprietary Information Figure 2 Typical Belfort AWOS Tower Equipment Mounting Locations ...

Page 17: ... 14 BELFORT INSTRUMENT Proprietary Information Figure 2a Securing the Tower for Maintenance ...

Page 18: ...connect the portable notebook computer with ACBSTXCOM installed to the DCP through the serial communication cable that extends to the bottom of the tower 9 If the system has a battery backup turn off the DC circuit breaker so battery backup is disabled Start the ACBSTXCOM program After 10 seconds turn the AC circuit breaker in the Belfort AWOS power box off and then on again to force a reset Immed...

Page 19: ...ook computer and reconnect the RS232 data communication cable to the visibility sensor if present Apply Dow Corning 4 liberally to the connection to protect against moisture 20 Remove and reapply power to the DCP to restore normal operation 21 If additional maintenance tasks are to be performed skip to next maintenance task If maintenance tasks are complete toggle the ALERT MESSAGE switch 4 times ...

Page 20: ...y with readings taken by a calibrated Kestrel Model 3000 Wind Instrument VERIFICATION INSTRUCTIONS 1 Turn on the HHDU Stand near the base of the Belfort AWOS tower facing into the wind Observe the Belfort AWOS wind indicator vane to ascertain wind direction Turn on the Kestrel Model 3000 select average mode and hold the Kestrel Model 3000 at eye level square to the wind and record the temperature ...

Page 21: ...ng verification clean the visibility sensor glass windows and the scatter plate with a non abrasive commercial window cleaner and a soft cloth 3 Toggle the ALERT MESSAGE toggle switch located on the lower half of the hinged tower section six 6 times 4 The Alert messages are programmed in the same order as they appear in Table 1 If an alert message other than message 6 is displayed consult the list...

Page 22: ...eaker in the power box After waiting 10 seconds turn it back on again to force a reset The display should show the start message with model and version number If not disconnect and reconnect the RS232 cable and remove and reapply power to the DCP once again If this does not result in the display showing the start message with model and version number contact Belfort Instrument Co customer support ...

Page 23: ...id point of the hood and slid back to the window as shown in Figure 3c Figure 3c Installation of Opaque Filters on Transmitter and Receiver Hoods 13 Type FZ then press enter on the terminal Answer Y when prompted are you sure question and wait approximately five 5 minutes for the routine to finish and prompt for acceptance This acceptance prompt allows you to recover from an accidental invocation ...

Page 24: ...book computer and reconnect the sensor RS232 cable to the communication cable running up to the DCP at the bottom of the tower Apply Dow Corning 4 liberally to the connection to protect against moisture 24 If the battery backup option is installed switch the DC circuit breaker back on if battery backup is present 25 If additional maintenance tasks are to be performed skip to next maintenance task ...

Page 25: ... cause the tower to fall over rapidly PARTS AND TOOLS REQUIRED 1 Belfort AWOS Hand Held Display Unit HHDU 2 Kestrel Model 3000 Wind Instrument VERIFICATION INSTRUCTIONS 1 Turn on the HHDU Stand near the base of the Belfort AWOS tower facing into the wind Observe the Belfort AWOS wind indicator vane to ascertain wind direction Turn on the Kestrel Model 3000 select average mode and hold the Kestrel ...

Page 26: ...le switch located on the lower half of the hinged tower section six 6 times See Table 1 This will assure that pushing REFRESH on the HHDU will display instantaneous rather than averaged wind direction and true rather than magnetic information 3 Remove tower securing bolts and tilt the tower until the cross arm is at a comfortable working height to access the wind direction sensor Secure it in that...

Page 27: ...need to be made proceed with Steps 8 thru 13 below else go to step 14 8 Remove the three 3 red plastic plugs and loosen the three 3 socket head screws holding the direction sensor to the cross arm 9 Rotate the sensor bottle in the direction required to obtain a reading of 360 10 Wait for five 5 seconds press the REFRESH button on the HHDU and read the wind direction Repeat this process until a rea...

Page 28: ...e sensor is not reporting correct direction Follow the Belfort AWOS System Component Failure Instructions in Section 5 10 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 ...

Page 29: ...monument and verify that it is clearly marked and easily located Replace or repaint as needed 4 If a battery backup is installed check the battery cable terminal connections for corrosion buildup If corrosion is evident disconnect the cables from the battery disconnect the cable connected to the negative post of the battery first 5 Clean battery posts and cable connectors using a battery terminal ...

Page 30: ... Non Federal Navigational Aids and Air Traffic Control Facilities in order to perform the Belfort AWOS Commissioning Annual Inspection Procedure Perform the Belfort AWOS Commissioning Annual Inspection Procedure provided in Appendix E Complete the Belfort AWOS Commissioning Annual Inspection Record Data Sheet during the test 5 9 THE VHF UNICOM RADIO ANNUAL MAINTENANCE The VHF Unicom operates under...

Page 31: ...t Failure Instructions If a Belfort AWOS system component fails a maintenance test stops operating or is suspect to be not operating correctly perform the following notification steps 1 Notify the proper airport authority of the Belfort AWOS system component failure Follow the airport authority instructions for dealing with the AWOS component failure 2 At the DATU display terminal if operational i...

Page 32: ...data Advisor software captures this data and compares it to the last status received If there is a difference in any of the data the software writes all the data to the Advisor Status Log and to the Advisor Current Status Page At any time the maintenance technician can view the most recently received Status Information displayed in a user friendly format The maintenance technician can also view th...

Page 33: ...ault DCP Status OK Fault Tower Alert Message Blank Alert Message selected Sensors Altimeter OK Fault Wind Speed OK Fault Wind Direction OK Fault Temperature Dew Point OK Fault Visibility OK Fault Visibility Polling Error Counter OK Fault Data Quality Check Pressure Sensor 1 OK Fault Check Pressure Sensor 2 OK Fault Check Temperature Dew Point Sensor OK Fault ...

Page 34: ... present when 14VDC from the AC to DC power supply is not present not connected to the DCP or the DCP AC status monitoring is faulty The system would be running from the backup battery in this case 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 ...

Page 35: ...hen suspect a DC power supply failure or loss of AC input voltage to the power supply or a DC voltage conductor in the tower power cable is broken or shorted If the AC voltage in missing then suspect an open circuit breaker AC wiring short AC Mains supply feed is off 6 If the Voltage to the AC monitoring circuit is restored re attach the DCP to the tower with it screws 7 Untie the rope and SLOWLY ...

Page 36: ...stem 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 MESSA...

Page 37: ...e and or humidity sensor INOP 5 Barometric pressure sensor INOP 6 Belfort AWOS being serviced Do not use readings 7 Belfort AWOS not maintained Do not use readings 8 Private Belfort AWOS weather station Do not use 9 Landing area warning 0 No Alerts The selected Alert information will be provided in the Alert Message Status area of the System Alert window 2 Only 1 alert at a time can be selected fr...

Page 38: ... 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...

Page 39: ...aintenance 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 ...

Page 40: ...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 ...

Page 41: ... 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 senso...

Page 42: ...rs 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 9 Remove the wind speed sensor from the tower cross arm and disconnect the sensor from the cable 10 Inspect the sensor connector and mating cable connector for damage pushed in pins broken contacts or evidence of corrosion Repair or replace the sensor ...

Page 43: ... 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 po...

Page 44: ...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 ho...

Page 45: ...issioning performance data and to record performance data after completion of major repair work If the repair work includes DCP replacement follow the DCP Site Configuration Procedure in Appendix F to enter the site specific information for the airport location 9 2 BELFORT AWOS TECHNICAL PERFORMANCE RECORD These forms are used to record the results from Tri Annual Annual performance checks complet...

Page 46: ... 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 ...

Page 47: ...customer support to make arrangements for replacement of defective components 9 Refer to the Belfort AWOS Installation and Checkout manual Section 9 0 for installation and checkout of the replacement parts 10 Document sensor replacement on the FAA form 6030 1 Figure 8 DCP Removal ...

Page 48: ...sks Refer to the Belfort AWOS Operator Manual for instructions on how to enter and delete NOTAMs 2 Remove tower securing bolts and tilt the tower until the cross arm is at a comfortable working height to access the Temperature Humidity 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 3 Power down the powe...

Page 49: ... 46 BELFORT INSTRUMENT Proprietary Information Figure 9 Temperature Humidity Sensor Removal ...

Page 50: ...e working height to access the Temperature Humidity 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 3 Power down the power enclosure by opening the AC and DC circuit breakers 4 Inside of the power enclosure disconnect the red and black visibility power harness connections from the terminal block TB3 5 In...

Page 51: ... 48 BELFORT INSTRUMENT Proprietary Information Figure 10 Visibility Sensor Removal ...

Page 52: ...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 3 Power down the power enclosure by opening the AC and DC circuit breakers 4 Remove the three 3 hole cap plugs in the bottom of the cross arm that cover the mounting screw access hole...

Page 53: ... 50 BELFORT INSTRUMENT Proprietary Information 16 Reinstall the screw on the top of the tri cup assembly 17 Go to step 10 of this procedure and follow those directions Figure 11 Wind Speed Removal ...

Page 54: ...e cross arm is at a comfortable working height to access the Wind Direction 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 3 Power down the power enclosure by opening the AC and DC circuit breakers 4 If the wind direction vane only needs to be replaced go to step 13 5 Remove the three 3 hole plugs in th...

Page 55: ...ew driver to loosen the set screws on the vane shaft Remove the vane 16 Position the new vane on the direction shaft and tighten the set screws 17 Use the rubber band to secure the vane as shown in Figure 4 18 Go to step 11 of this procedure and follow instructions Figure 12 Wind Direction Sensor Removal ...

Page 56: ...rew driver loosen the screws to release the AC feed wires L one black N white and green 6 With the screw driver loosen the screws to release the DC output wires 12v supply V red wire V black wire 14v supply V red wire V white wire V black wire V green wire 7 With the screw driver release the power supply catch mechanism that secures the supply to the din rail 8 Examine the replacement power supply...

Page 57: ...necessary for the supply that was replaced 17 Document the supply replacement on the FAA form 6030 1 Figure 13 Power Supply and Surge Suppressor Mounting Note The Altech power supply replaces the obsolete Sola Power Supply Sola supplies are still in older systems in the field 10 7 SURGE SUPPRESSOR REPLACEMENT INSTRUCTIONS SAFETY PRECAUTIONS 1 Do not perform outdoor Belfort AWOS maintenance tasks d...

Page 58: ...ressor 7 Examine the wiring harness and locate the wires that go to the suppressor One black wire goes to the circuit breaker One black wire go to the Black wire terminal on TB2 The white wire goes to the White wire terminal on TB2 The green wire goes to the green wire terminal on TB2 8 Disconnect the suppressor wires from the terminal blocks by loosening the terminal block screws while documentin...

Page 59: ...RT NUMBER 80033 WASHERS ITEM PART NBR FASTENER QTY FLAT LOCK NUT H1 80022 Socket Head Screw M4 x 8 6 6 6 H2 80023 Hex Head Bolt 20 x 7 7 7 H3 80025 Flat Head Screw 8 32 x 2 H4 80026 Pan Head Screw 8 32 x 4 4 4 H5 80027 Hex Head Bolt 3 8 16 x 1 6 6 6 H6 80028 Hex Head Bolt 3 8 16 x 4 1 3 2 2 H7 80030 Hex Head Bolt 13 x 7 2 4 4 Table 3 Recommended Spare Hardware Note The full Bill of Material is ava...

Page 60: ...BELFORT INSTRUMENT Proprietary Information Appendix A Belfort AWOS Maintenance Forms ...

Page 61: ...e FAA Form 6030 1 Problems Identified Yes No 2 Record current weather system outputs _______________ _______________ _______________ _______________ Location Time Wind speed Wind Direction _______________ _______________ _______________ _______________ Altimeter Setting Temperature Relative Humidity Dew point _______________ _______________ _______________ _______________ Density Altitude Condensa...

Page 62: ...ification Procedure in Maintenance Manual Appendix G Battery voltage within between 3 5v and 4 8v Pass Fail Clock is receiving WWVB Updates Last update is with 5 days of current date Pass Fail PC Clock contains correct local date and time Pass Fail Review the past years maintenance log and verify that no replacement of the Atomic Clock was made If a replacement was made verify that P N and Revisio...

Page 63: ...________________ Belfort AWOS Phone Version __________________ Has any software been changed since initial or last Annual Validation Yes No If yes do maintenance records reflect the change Yes No Is Current P N and Revision acceptable to current authorized VDD baseline Yes No 3 Record DCP Serial Number and Revision and verify that it has not been changed since the last Annual or Initial System Ins...

Page 64: ...t years maintenance log and verify that no replacement of the Visibility sensor was made If a replacement was made verify that P N and Revision installed is acceptable to current authorized VDD baseline Yes No Record any configuration difference s identified _____________________________ 7 Perform the Annual Wind Speed Sensor confidence validation refer to Maintenance Manual section 5 5 Pass Fail ...

Page 65: ...past years maintenance log and verify that no replacement of the Atomic Clock was made If a replacement was made verify that P N and Revision installed is acceptable to current authorized VDD baseline Yes No Record any configuration difference identified ______________________________ 10 Document and correct any configuration discrepancies identified Corrections Required Yes No 11 Return the syste...

Page 66: ...BELFORT INSTRUMENT Proprietary Information This page intentionally left blank ...

Page 67: ...ort AWOS Advisor Version __________________ Belfort AWOS Voice Mic Click Version __________________ Belfort AWOS Phone Version __________________ H Display and review the Advisor current status and history log since last maintenance activity for error flags or unexplained recurrent system problems Document system problems on the FAA Form 6030 1 Problems Identified Yes No Record current weather sys...

Page 68: ...______ _________ 0 02 in Hg Y ___ N ___ _________ Review the past year maintenance log to see if the DCP with pressure sensors had been replaced If it was replaced indicate that fact here DCP Replaced Yes No From the maintenance logs review the previous measured pressure sensors values and document any change in the measured sensor values since the last altimeter check Sensor Drift BP1_________ BP...

Page 69: ...and time Pass Fail Review the past years maintenance log and verify that no replacement of the Atomic Clock was made If a replacement was made verify that P N and Revision installed is acceptable to current authorized VDD baseline Yes No 11 Perform the DCP UHF Data Radio Accuracy Test Section IV of Appendix E Belfort AWOS Commissioning Annual Inspection Procedure Record the measured values Belfort...

Page 70: ..._______________________ 1 khz 4 Unicom RF Output Power ______________________Watts 2 5 watts watt 5 Unicom AM Demodulation ________________________ 65 to 95 6 Unicom VSWR _____________________ 3 0 1 12 Record all corrective actions or adjustments made on FAA Form 6030 1 11 Return the system to service and verify the system is reporting data as expected Completed by ___________________________ Date...

Page 71: ...BELFORT INSTRUMENT Proprietary Information Appendix B Belfort AWOS Tri Annual Annual 5 Year Maintenance Plan ...

Page 72: ...phone and Unicom voice outputs to verify the system data outputs are as expected for the specific Belfort AWOS configuration options installed at the site 2 Cleaning the DATU computer and verifying that the computer power supply processor fans and Atomic clock and PC clock are functioning properly 3 Download and install any Windows OS Updates 4 Cleaning and calibrating the visibility and ambient l...

Page 73: ...rmance Configuration Revalidation will consist of 1 Coordinating a site visit with the assigned FAA regional technical representative to enable the FAA Representative to either concurrently witness performance of the Annual Performance Maintenance Checks or for the FAA Representative to verify specific or all of the system performance verifications 2 This visit will also verify the configuration o...

Page 74: ...BELFORT INSTRUMENT Proprietary Information Appendix C UHF Transceiver Specifications ...

Page 75: ...e operating specifications for the UHF Transceiver are as follows Frequency 467 850 MHZ Initial Tolerance 2 KHz Operating Tolerance 2 KHZ 467 925 MHZ Initial Tolerance 2 KHz Operating Tolerance 2 KHZ Output Power 1 0 W Initial Tolerance Upper 25 W Lower 25 W Operating Tolerance Upper 25 W Lower 25 W Frequency Deviation 2 2 KHz Initial Tolerance 0 5 KHz Operating Tolerance 0 5 KHz VSWR 1 0 1 Initia...

Page 76: ...BELFORT INSTRUMENT Proprietary Information Appendix D Standard Unicom Radio ICOM A110 VHF Radio Specifications ...

Page 77: ...memory Ch 20 Antenna connector SO 239 50Ω Power supply requirement negative ground 13 75 V DC or 27 5 V DC automatic selection Current drain at 13 75 V DC Transmitting Receiving 5 0A max 4 0A at AF max 0 5A at stand by Operating temperature range 30 C to 60 C 22 F to 140 F Frequency stability 5 ppm 30 C to 60 C Dimensions projections not incl 150 W 50 H 180 D mm 529 32 W 131 32 H 73 32 D in Weight...

Page 78: ...dB Less than 25 kHz at 60 dB More than 2 778 kHz at 6 dB Less than 7 37 kHz at 60 dB Spurious response More than 74 dBµ Intermodulation rejection ratio More than 64 dB BIocking desensitisation More than 70 dB Cross modulation rejection More than 70 dB Audio output power Internal speaker External Speaker Headeset side tone at 13 75 V 10 dist 60 mod 1 5 W typical w 8Ω load More than 10 0 W w 8Ω load...

Page 79: ...BELFORT INSTRUMENT Proprietary Information Appendix E Belfort AWOS Commissioning Annual Inspection Procedure Data Record ...

Page 80: ...or 50 Watts and 5 Watts 5 Voltmeter 6 Belfort AWOS Commissioning Annual Record Data Sheet Drawing 80xxx II Preparation 1 On the Belfort AWOS Commissioning Annual Record fill in the Date Location and Technician information 2 Verify Serial Number and the valid Calibration Dates as required for all test equipment used Complete the Calibration Date information on the Belfort AWOS Commissioning Annual ...

Page 81: ... arrow key under FWD Units until display reads MW Press orange arrow key under RF Units until display reads VSWR III Tower Voltages Test 1 Using the voltmeter measure the following voltages and record the measurements a AC Supply Voltage Measure the AC Source Voltage on the AC Voltage connection terminals The voltage should be between 112vac and 125vac If the voltage is within range record the vol...

Page 82: ...s If the fluid levels are correct then record the information on the Commissioning Annual Record Data Sheet and go to test Step f If any of the levels are incorrect add water to the cell to the required level Record the information on the Commissioning Annual Record Data Sheet and go to test Step f f Close the Battery Circuit Breaker IV Belfort AWOS DCP UHF Data Radio Accuracy Test 1 Notify Region...

Page 83: ... Sheet If the RF power is out of range then the Ritron RF Transceiver should be replaced 11 On the HP8920D note the measured RF modulation value The modulation value should be between 78 and 85 If the RF modulation is in range then record the value on the Commissioning Annual Record Data Sheet If the RF modulation is out of range then the Ritron RF Transceiver should be replaced 12 Press any key o...

Page 84: ...en 78 and 85 If the RF modulation is in range then record the value on the Commissioning Annual Record Data Sheet If the RF modulation is out of range then the Ritron RF Transceiver should be replaced 24 Press any key on the PC keyboard to stop the K 1 Khz tone output 25 Disconnect the HP8920D from the 50 ohm coax cable Connect the coax cable to the Input connector of the Bird Model 5010 Direction...

Page 85: ... 7 On the HP8920D note the TX Frequency value and record it on the Commissioning Annual Record Data Sheet as the Unicom FCC Authorized Frequency value If the Frequency is not the authorized frequency change the frequency to the authorized value and make note of the change Then contact the facility representative and notify them of the correction made to the Unicom authorized frequency 8 On the HP8...

Page 86: ...anel select VSWR measurement 15 On the FBO PC connected to the radio initiate the 1 khz tone output on the audio output lines as follows a On PC navigate to c Belfort AWOS folder b Double click on 1khz wav c The 1 KHz tone will start to play 16 On the Bird Power Meter note the measured VSWR value The VSWR should be 3 0 1 The optimal value is 1 0 1 If the VSWR is in range then record the value on t...

Page 87: ...r Min _______ 3 Sensor Ext_Co _______ 4 Sensor Max ________ Belfort AWOS UHF Data Radio Accuracy Checklist 1 DCP Radio Serial Number ______________ 2 DCP FCC Authorized Frequency ___________________ 467 850 MHZ 3 DCP Freq Deviation _____________________________ 2 2 KHZ2 0 5 KHZ 4 DCP RF Output Power ______________________Watts 75 to 1 25 watts 5 DCP RF Modulation ________________________ 78 to 82 ...

Page 88: ...BELFORT INSTRUMENT Proprietary Information Appendix F DCP Site Configuration Procedure ...

Page 89: ... the tower 5 Disconnect all cable connectors from the unit Note the locations of the cable connectors when connected to the DCP 6 Connect the cables to the new DCP 7 Re install the four mounting screws to hold the new DCP to the tower 8 Connect the PC to the DCP cable dongle in the DCP Power Enclosure 9 On the PC open a DOS window and browse to the TXCOM program for the version of DCP program in t...

Page 90: ...ank Enter the Latitude information from the AIRNAV and Customer Site Survey documentation Press cr Enter the Latitude on the Comprehensive Facility Performance and Adjustment Form 19 To enter the Longitude information press the backspace key until the field is blank Enter the Longitude information from the AIRNAV and Customer Site Survey documentation Press cr Enter the Longitude on the Comprehens...

Page 91: ... blank Enter the Password value Press cr Enter the Site Password on the Comprehensive Facility Performance and Adjustment Form 28 Press enter and verify the Transmitter Data information is displayed as follows Transmitter Data UHF PriTx Frequency Frequency is not changeable UHF SecTx Frequency Frequency is not changeable TX Power H 29 To enter the TX Power press the backspace key until the field i...

Page 92: ...has a VHF radio option use an airport supplied VHF radio or a hand held VHF radio click the mick the set number of times to initiate the VHF broadcast Listen to the full message and confirm that the telemetry matches the data on the HHDU or on the Advisor screen on the DATU If the system if an endless loop broadcast system use the airport supplied VHF radio or a hand held VHF radio set to the broa...

Page 93: ...BELFORT INSTRUMENT Proprietary Information Appendix G Belfort AWOS Atomic Clock Verification Procedure ...

Page 94: ...Test UUT 5 Connect the unit to the PC with its USB cable and wall pack power supply 6 On the PC start Hyper terminal HT at 9600 8 N 1 no handshaking In HT select the PC USB Com port that the Atomic Clock is connected to 7 In HT enter the command RN followed by the enter key 8 The unit should respond with the unit serial number in the following message format Verify that the serial number is correc...

Page 95: ... Belfort Service Tech or factory for instructions 13 In HT enter the command RT followed by the enter key The unit should now respond with the correct local time in the following message format i T 01 29 2013 13 41 59 14 If the unit still reports the wrong local time contact the Belfort Service Tech or factory for instructions 15 If the unit has been powered and previously connected to the PC with...

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