(AWOS) Maintenance Manual
Contents
1. Acceptable Tolerance 2 F 1 1 C Fail B A Temperature Pass Check operation of MARS fan X Visibility Rotate sensor to avoid direct sunlight on receiver optics Item Initial Value New Value Calibration Accomplished Psychrometer AWOS Wet Bulb Dew Point Average Within 5 F 28 C C Dew Point FromA amp C E Acceptable Tolerance 39 1 7 C Fail Fail D E Dew Point Pass Pass Accomplished Acceptable Tolerance 39 70 Diff Pass Fail Note Accept calibration if passed Report non acceptance to AWI Rotate sensor to original position System Checked and Verified By Accomplished Date Time Page 2 of 3 AWOS Quarterly Technical Performance Record Name and Location Date XI Day Night Sensor Quarterly procedures performed per sensor manual XII Precipitation Sensor Quarterly procedures performed per sensor manual XIII Barometric Pressure Sensor Serial Reference Acceptable Adjustment Adj Value Number Standard A Reading B A B Tolerance Required A B BP1 0 005 Y N BP2 0 005 Y N Note Adjustment is required if A B is greater than the acceptable tolerance XIV Cloud Height Sensor Model 8329 Acceptable Item Value Tolerance Pass Fail Check Desiccant Color Blue Laser Indicator Cycles On Off Check Blower Turn On Time 3 Minutes Model 8339 Acceptable Item Tolerance Check Blower Turns on2. 18 3 Digital voltmeter 4 1 2 digit Clean dry cloth Lint free Lens cleaning solution Non ammonia based Lightweight greaseless oil e g 3 in 1 or equivalent 8329 Ceilometer desiccant cartridge M028113 8329 Ceilometer blower filter fine M028121 8329 Ceilometer blower filter coarse M103966 8339 Ceilometer desiccant cartridge M028181 00 Black component bag RTV sealant RTV 162 Paint Sandpaper Optional Sensor Simulator An optional Sensor Simulator 11920 is available from All Weather Inc that connects directly to the DCP and can be used to simulate sensor outputs during maintenance of the AWOS Radio Annual Revalidation The procedures required for annual revalidation of UHF and VHF radios should be performed by a qualified radio shop equipped with the necessary test equipment and staffed by FCC certified technicians Page 3 Maintenance Manual Automated Weather Observing System AWOS AWOS Lowest Replaceable Units LRUs The following list shows the lowest replaceable units LRUs for the 900 Series AWOS When a sensor is replaced the annual procedure for that sensor should be performed NOTES s Indicates Optional Equipment Description Model AUTOMATED WEATHER OBSERVING SYSTEM 900 Series DATA COLLECTION PLATFORM 1190 PCB AWOS Data Collection M404804 DCP Firmware M469050 Sensor Interface Controller M404806 Ceilometer Interface Firmware M469052 Visibility Inte
3. Any sudden changes observed Y 360 10 Observed 90 3 Observed 180 3 Observed 270 3 Observed c Bearing wear test Vane turns freely 2020 amp 2100 VIII Wind Speed SN 2100 2020 2040 a Using 1800 rpm run up motor DCP LCD reads Pass Fail 79 81 knots 2030 78 80 knots 2100 b Bearing wear test Cups Propeller turn freely 2020 amp 2100 c Lubricate felt washer 2100 Accomplished d Field Zero Wind Check 2040 0 knots System Checked and Verified By Date Time AWOS Comprehensive Facility Page 2 of 5 Performance and Adjustment Data Form Temperature Humidity SN Psychrometer AWOS Time Temperature 1 5 min Temperature Psychrometer AWOS Wet Bulb Dew Point 3 0 min 4 5 min 6 0 min 7 5 min Average Within 1 F 4 96 Average Within 5 F 28 C C Acceptable Tolerance B A 2 F 1 1 C Temperature Pass Fail Check operation of 8190 MARS fan Visibility SN Rotate sensor to avoid direct sunlight on receiver optics Item Initial Value Calibration New Value Dew Point FromA amp C E Acceptable Tolerance D E 3 F 11 70 Dew Point Pass Fail Pass Fail Accomplished Acceptable Tolerance 3 Diff Pass Fail Note Accept calibration if passed Report non acceptance to AWI Rotate sensor to original position Day Night Sensor SN Item Nighttime Daytime Night Day
4. M404602 M595060 M595061 M404601 M404605 M438105 83291 C M103966 2812 M028113 M442046 M442047 M442048 M442062 M103950 M103951 8339 F M403434 01 M404848 02 M403414 00 M442088 00 M442089 00 M028181 00 83395 00 8339 D M403434 00 M403434 01 M404848 01 M404848 02 M403414 00 M442088 00 M442089 00 M028181 00 83395 00 6490 M482105 M406053 M406054 M406055 M406056 M406057 M438150 Automated Weather Observing System AWOS Maintenance Manual Description Model Heater Power Supply M438151 PCB Sensor Interface M404806 Present Weather Firmware EPROM M469053 Lightning Thunderstorm Sensor 6500 Freezing Rain Sensor 6495 MISCELLANEOUS EQUIPMENT TO Printer Ribbon 20911 T Printer 20910 A EF Microphone 20906 S Speakers 20904 TR UHF VHF Antenna M489103 FX VHF Radio 1791 i UPS 10 Min CDP 20913 A ms UPS 60 Min CDP 20913 C d UPS 5 Min CDP 20913 E Warranty This equipment has been manufactured and will perform in accordance with requirements of FAA Advisory Circular 150 5220 16C Any defect in design materials or workmanship which may occur during proper and normal use during a period of 1 year from date of installation or a maximum of 2 years from shipment will be corrected by repair or replacement by All Weather Inc Forms The following pages contain the Comprehensive Facility Performance and Adjustment Data Form and the Monthly and Quarterly Technical Performance Records These master forms should be copied and
5. NUMBER DATE OBSERVER 2 0200 LLL TABLE I EXPERIMENTAL DATA TABLE Il REFERENCE VALIDITY CHECK E CORRECTED VALUES AWOS TEMPERATURE 7 m IF ALL YES NUMBER PROCEDURE qe DEW POINT SENSOR REFERENCE PSYCHROMETER 1 REFERENCE PSYCHROMETER 2 IS Tg FROM 5 Twet FROM IS Tet FROM IS Twet FROM ENTER PASS EACH cd DENTIFICATION DENTIFICATION REFERENCE 1 REFERENCE REFERENCE REFERENCE 2 OTHERWISE PASS WITHIN 1 F OF WITHIN 1 F OF WITHIN 0 5 F OF WITHIN 0 5 F OF ENTER FAIL CHECK TEMP DEW PON REFERENCE 42 REFERENCE 42 FOLLOWING Twet FOLLOWING Twet EW P Em de 8 YES NO YES NO YES NC YES NO Ting F DPing PF Tory CP Twet CF Tdry F Twet CF YES NO YES NO AFTER 15 AFTER 25M AFTER 35 AFTER 45 AFTER eee all Sere ial 5 5 MIN een el pret Ee Kamp E T qM ALIE Cer TABLE DEW POINT CALCULATIO ABLE IV TEMPERATURE ANALYSIS TABLE V DEW POINT ANALYSIS IF NUMBER OF PASS CHECKS IN TABLE IIS LESS THAN 3 DO NOT a AVERAGE CORRESPONDING AVERAGE CORRESPONDING CONTINUE WITH EXPERIMENT IF NUMBER W Eee SEE EROR OF REFERENCE PSYCHROMETER 1 REFERENCE PSYCHROMETER REFERENCE AWOS SENSOR REFERENCE AWOS SENSOR g DES E PASS TEMP EMP INDICATION 2 DEW POINT DEW PT INDICATION DPre DPing KDP ef OPing CONTINUE ON TO TABLE M AND S 1 T Tref
6. Ting Tret 7 Dp DP COMPUTE DEW POINT TEMPERATURE CHECK TEMP DEW POINT TEMP DEW POIN ref ind oF or ref ind F F FROM CORRESPONDING WET DRY Ta CP F dry CP F F F F i CF CF TEMPERATURE DATA USE STANDARD PSYCHROMETRIC TABLES 2 4 TABLE i UNCORRECTED VALUES ADD ALL ADD ALL REFERENCE PSYCHROMETER 1 REFERENCE PSYCHROMETER 2 Tret Ting DP ref DP ing DENTIFICATION DENTIFICATION VALUES VALUES DIVIDE ABOVE DIVIDE ABOVE Ta Tua F Tay CF Tua VALUE BY NUMBER VALUE BY NUMBER p LAN ay ees OF PASS CHECKS OF PASS CHECKS CALCULATE NDS CALCULATE m SQUARE ROOT ENSE SQUARE ROOT GRE AWOS WS DWG rod allweatherinc Weather Inc 1165 National Drive Sacramento CA 95818 Fax 916 928 1165 Phone 916 928 1000 Toll Free 800 824 5873 903 027 Revision P ECO 1691 November 2008
7. Yes Desiccant replaced Accomplished Reasonableness of Output Data Observation Acceptable Item AWOS Estimate Tolerance Pass Sky Condition Consistency Visibility 32 Increments Temperature Measured Value Dew Point Measured Value Wind Direction 30 Wind Speed 5 Knots If observation is clear no clouds AWOS must be CLR If observation has clouds below 12 000 AWOS must be the same XVI Present Weather Checks Acceptable Field Display Tolerance Pass Present Weather W Empty if no precip Status Sssss 0000 Xnnn 405 420 Lnnn 30 to 50 Knnn 0 to 150 Hnnn 40 to 120 Tnnn Ambient 5 F System Checked and Verified By Date Time Page 3 of 3 AWOS Quarterly Technical Performance Record XVII Lightning Thunderstorm Sensor Quarterly procedures performed per sensor manual XVIII Freezing Rain Sensor Quarterly procedures performed per sensor manual System Checked and Verified By Date Time AWOS Annual Page 1 of 5 Technical Performance Record Accomplished Notify local users Complete monthly tasks and log Power up pressure standard Apply touch up paint where needed Inspect Data Collection Platform a Drain and clean pressure port b Check reference voltages Acceptable Item Counts Range 5 0V Reference 4090 4095 5 0V Reference 0 5 When any values are out of acceptable range the original value shall be noted the adjustments pe
8. sufficient copies stored at a convenient location in each site s Facility Reference Data File FRDF The Comprehensive Facility Performance and Adjustment Data Form is to be completed at system commissioning after major repair work and during annual revalidation The Technical Performance Records are used during periodic maintenance and include space to record the results of the monthly and quarterly maintenance procedures described in the individual sensor and component manuals Page 7 Page 1 of 5 AWOS Comprehensive Facility Performance and Adjustment Data Form Accomplished Notify local users Complete monthly tasks and log Power up pressure standard Apply touch up paint where needed Inspect Data Collection Platform a Drain and clean pressure port b Check reference voltages Acceptable Item Counts Range 5 0V Reference 4090 4095 5 0V Reference 0 5 When any values are out of acceptable range the original value shall be noted the adjustments performed and the new values noted separated from the originals by a slash with pass noted VI Inspect tower and tower lights a 8518 A Foldover Tower apply grease and oil VII Wind Direction SN 2100 2020 2040 a Align to benchmark 2020 amp 2100 Acceptable Tolerance Pass Fail Benchmark direction Visually aligned b Direction linearity test 2020 amp 2100 Display wind direction on LCD display rotate full 360 Any dropouts observed YY
9. Automated Weather Observing System AWOS Maintenance Manual 903 027 allweatherinc All Weather Inc 1165 National Drive Sacramento CA 95834 USA www allweatherinc com Automated Weather Observing System AWOS Maintenance Manual CONTENTS Oval Vies o oO Na ERR INO EAT DU System Performance Parameters esses eene eene 1 Maintenance Proceduifes rt Pe ea ert EYE en e Re ds 1 Data Recording Forms d ad te ied ra ane Installation amp Checkout MONnual cccceeeeeeecceeeeeececeeeeeececeaeeeeceeeeaeeeeeeees 1 Operating des esu a eeu ea PR dana irai 2 Training Program re ER a he sansa be 2 Annual Revalidation Test Equipment cs 2 Annual Revalidation Tools and et c sega de ged 3 Optional Sensor o 3 Radio Annual EAE 3 AWOS Lowest Replaceable Units ERUS ca cerea eo eir han 4 Warrdrnly iecit rrr ere eene ete ex US ek seas pues E ehe ye 7 FOM S DEMEURE 7 Page i Automated Weather Observing System AWOS Maintenance Manual Overview This manual provides instructions for maintaining and revalidating All Weather Inc AWOS systems It includes forms for recording the results of monthly quarterly and annual maintenance procedures the
10. Detector Assembly M104864 Controller Assembly M403261 Firmware M59603 1 Fuse 1 4A Slo Blo M442027 Fuse 5A Slo Blo M442059 Fuse 4A M442058 Visibility Sensor 8364 E Emitter Assembly M105061 Detector Assembly M105060 Controller Assembly M403322 Firmware M469058 Fuse 10A Slo Blo M442071 Fuse 5A Slo Blo M442070 Fuse 2A M442046 Fuse 4A M442048 Fuse 5A M442057 Page 5 Maintenance Manual Description 8329 Cloud Height Sensor Page 6 Transmitter Receiver Electro Optics Assy w laser CPU PCB Master Firmware Slave Firmware Control PCB Signal Detector PCB 8329 Cloud Height Sensor Cont Power Supply Blower Fan Heater Assy Blower Filter Coarse Blower Filter Fine Desiccant Cartridge Fuse 2A Fuse 3 15A Fuse 4 0A Fuse 25A Outer Shield Inner Cover 8339 Cloud Height Sensor CE version Optical and Laser Module DAC amp Power PCB Blower 320 CFM 110 Vac Fuse 5x20mm 5A 250V Fuse 5x20mm 10A 250V Desiccant Battery 8339 Cloud Height Sensor non CE version Optical and Laser Module DAC amp Power PCB Blower 320 CFM 110 Vac Fuse 5x20mm 5A 250V Fuse 5x20mm 10A 250V Desiccant Battery Present Weather Sensor Sensor Head Assembly Transmitter Modulator TXM Card Automatic Gain Control AGC Card Signal Processor 1 SP1 Card Signal Processor 2 SP2 Card Microprocessor MPU Card Electronics Power Supply Automated Weather Observing System AWOS Model 8329 A M403194 M403197 M403200
11. Precipitation Sensor SN Check for level Check for internal damage Check heaters Switch test Measured Item Value A 1 cycle Cloud Height Sensor SN Model 8329 Item Check Desiccant Laser Indicator Check Blower Replace Blower Filters Value B 2 counts Value Color System Checked and Verified By Indication A Reference B Reference Cycles Turn On Time 3 Minutes Accomplished Acceptable Tolerance A B A B Pass Accomplished Accomplished Accomplished Acceptable A B Tolerance Pass Acceptable Tolerance Pass Fail Blue On Off Accomplished Date Time Page 3 of 5 AWOS Comprehensive Facility Performance and Adjustment Data Form Name and Location Date XIII Cloud Height Sensor cont CDP Maintenance Menu Status errors Clouds detected when rainfall reported Yes No Any ceilometer pilot reports logged Yes No If yes note report s Minimum ceiling check white paper over lens Expected 100 feet Reported Model 8339 Acceptable Item Value Tolerance Pass Fail Check Blower Turns on Yes Blower cleared of debris Accomplished Desiccant replaced Accomplished XIV Barometric Pressure Serial Reference Acceptable Adjustment Adj Value Number Standard A Reading B A B Tolerance Required A B BP1 0 005 Y N BP2 0 005 Y N Note Adjustment is required if A B is greater than the acceptable tolerance Altimeter Setting Ch
12. arameter Value A Value B Tolerance A B Pass Radio Pwr at Xmtr 1 0W 0 5W VSWR at Xmtr 1 0 1 Initial value 2 0 1 max Operating value 3 0 1 max Frequency 1 5 kHz Deviation 2 4 3 8 kHz XX Central Data Platform a Perform monthly procedures Accomplished b Barometric pressure adjustment Sensor Correction Accomplished BP1 BP2 Voice check listen to telephone or radio message Voice data is clear no data missing Pass Fail Record observations on monthly form Accomplished d Voice data check Estimate the weather conditions and compare the manual observation with the output of the AWOS obtained above Agree Disagree If observations disagree log and correct the failed condition e Voice remark check Input a test remark using the microphone verify using the speakers Acceptable if the same Acceptable Unacceptable Delete the test remark Verify using the speakers Accomplished UHF Radio at the CDP performed by FCC certified shop Measured Standard Acceptable Parameter Value A Value B Tolerance A B Pass Radio Pwr at Xmtr 1 0W 0 5W VSWR at Xmtr 1 0 1 Initial value 2 0 1 max Operating value 3 0 1 max Frequency 31 5 kHz Deviation 2 4 3 8 kHz System Checked and Verified By Date Time AWOS Annual Page 5 of 5 Technical Performance Record XXII UHF Radio at the CDP Antenna for cables longer than 50 performed by FCC certified shop Me
13. asured Standard Acceptable Parameter Value A Value B Tolerance A B Pass Fail Radio Pwr at ant 0 20W 0 15W VSWR at ant 1 0 1 Initial value 2 0 1 max Operating value 3 0 1 max Frequency 1 5 kHz Deviation 3 0 kHz 2 4 3 8 kHz XXIII WHF Radio performed by FCC certified shop Measured Standard Acceptable Parameter Value A Value B Tolerance A B Radio Pwr at Xmtr 2 5W 1 0 W VSWR at Xmtr 1 0 1 Initial value 2 0 1 max Operating value 3 0 1 max Frequency 1 0 kHz Modulation 8096 65 95 XXIV VHF Radio at the Antenna for cables longer than 50 performed by FCC certified shop Measured Standard Acceptable Parameter Value A Value B Tolerance A B Pass Fail Radio Pwr at ant 1 0 W 0 5 W VSWR at ant 1 0 1 Initial value 2 0 1 max Operating value 3 0 1 max Frequency 1 0 kHz Modulation 65 95 XXV NADIN Interface as applicable Operation of the link confirmed with CLH Accomplished XXVI Monthly and Quarterly Logs Review Review all monthly and quarterly log sheets for compliance with manual Accomplished System Checked and Verified By Date Time E DEW POINT WORK SHEET VERIFICATION EXPERIMENT
14. chrometer AWOS Wet Bulb Dew Point Average Within 5 F 28 C C Dew Point FromA amp C E Acceptable Tolerance D E 3 F 11 70 Dew Point Pass Fail Pass Fail Accomplished Acceptable Tolerance 3 Diff Pass Fail Note Accept calibration if passed Report non acceptance to AWI Rotate sensor to original position Day Night Sensor SN Item Nighttime Night Daytime Day Precipitation Sensor SN Check for level Check for internal damage Check heaters Switch test Reference Value B 2 counts Measured Item Value A 1 cycle Cloud Height Sensor SN Model 8329 Item Check Desiccant Laser Indicator Check Blower Replace Blower Filters Value Color Cycles System Checked and Verified By Indication A Reference B Accomplished Acceptable Tolerance A B A B Pass Fail Accomplished Accomplished Accomplished Acceptable A B Tolerance Pass Acceptable Tolerance Blue On Off Pass Fail Turn On Time 3 Minutes Accomplished Date Time Page 3 of 5 AWOS Annual Technical Performance Record Name and Location Date XIII Cloud Height Sensor cont CDP Maintenance Menu Status errors Clouds detected when rainfall reported Yes No Any ceilometer pilot reports logged Yes No If yes note report s Minimum ceiling check white paper over lens Expected 100 feet Reported Model 8339 Acce
15. complete instructions for which are provided in the individual sensor and system component manuals The following sections explain the requirements for maintenance of an AWOS system and direct the user to where the appropriate information can be found System Description A full description of the AWOS system can be found in the Model 2090 Central Data Platform CDP Manual 2090 001 which includes system drawings descriptions of software operation and operator terminal screens and the possible sensor and component configurations of an AWOS System Performance Parameters System performance parameters are given in the individual sensor and component manuals Detailed specifications are provided for each component along with the maintenance and corrective action procedures required An overall description of the AWOS system s performance parameters can be found in the Model 2090 Central Data Platform CDP Manual 2090 001 Maintenance Procedures Monthly quarterly and annual maintenance procedures for all AWOS components are found in the individual sensor and component manuals Maintenance procedures for the Model 2020 Wind Vane for example are found in the Model 2020 User s Manual 2020 001 The Technical Performance Records and the Comprehensive Facility Performance and Adjustment Data Form included in this manual are used in conjunction with these instructions to record the results of the specified tests and procedures Data Reco
16. e and make recommendations for system component changes that would enhance the reliability or functionality of the AWOS All Weather Inc provides a comprehensive training and certification program for all AWOS technicians to ensure thorough knowledge and competence in working with AWOS systems Annual System Revalidation Plan Annual system revalidation is carried out by following the instructions for annual maintenance provided in the individual manuals taking any required corrective action and recording the results on the Comprehensive Facility Performance and Adjustment Data Form Annual Revalidation Test Equipment The following list gives the test equipment required during validation and annual revalidation of the AWOS Description Part Model No Specifications Visibility calibrator M104744 5211 Sling Psychrometer or 5230 Assmann Psychrometric calculator 5282 A C Pressure standard Z003919 600 1000 mb Wind Speed Calibrator 1231 required for all vis sensors Vis Sensor Handheld Terminal M403321 e 8364 E required for 204 Zero Wind Chamber M105548 00 E S Page 2 Automated Weather Observing System AWOS Maintenance Manual Annual Revalidation Tools and Supplies The following list gives the tools and supplies required during validation and annual revalidation of the AWOS Description Part Model No Specifications Assorted hand tools Extension cord 50
17. eck Calculated inHg Reported XV Present Weather Checks Acceptable Field Display Tolerance Pass Fail Present Weather W Empty if no precip Status Sssss 0000 Xnnn 405 420 Lnnn 30 to 50 Knnn 0 to 150 Hnnn 40 to 120 Tnnn Ambient 5 F XVI Lightning Thunderstorm Sensor SN a Check antenna for damage corrosion Accomplished b Check antenna sealant Accomplished c Clean all surfaces Accomplished d Check hardware and cable connections Accomplished XVII Freezing Rain Sensor SN a Check sensor and mast for damage corrosion Accomplished b Check cables and hardware connections Accomplished c Clean all surfaces Accomplished XVIII Hardware Inspection Accomplished All rust corrosion etc has been sanded and touch up paint applied Accomplished Defects System Checked and Verified By Date Time Page 4 of 5 AWOS Comprehensive Facility Performance and Adjustment Data Form XIX UHF Radio at the Sensor Site performed by FCC certified shop Measured Standard Acceptable Parameter Value A Value B Tolerance A B Pass Radio Pwr at Xmtr 1 0W 0 5W VSWR at Xmtr 1 0 1 Initial value 2 0 1 max Operating value 3 0 1 max Frequency 1 5 kHz Deviation 2 4 3 8 kHz XX Central Data Platform a Perform monthly procedures Accomplished b Barometric pressure adjustment Sensor Correction Accomplished BP1 BP2 Voice check listen to telepho
18. ne or radio message Voice data is clear no data missing Pass Fail Record observations on monthly form Accomplished d Voice data check Estimate the weather conditions and compare the manual observation with the output of the AWOS obtained above Agree Disagree If observations disagree log and correct the failed condition e Voice remark check Input a test remark using the microphone verify using the speakers Acceptable if the same Acceptable Unacceptable Delete the test remark Verify using the speakers Accomplished UHF Radio at the CDP performed by FCC certified shop Measured Standard Acceptable Parameter Value A Value B Tolerance A B Pass Radio Pwr at Xmtr 1 0W 0 5W VSWR at Xmtr 1 0 1 Initial value 2 0 1 max Operating value 3 0 1 max Frequency 31 5 kHz Deviation 2 4 3 8 kHz System Checked and Verified By Date Time Page 5 of 5 AWOS Comprehensive Facility Performance and Adjustment Data Form XXII UHF Radio at the CDP Antenna for cables longer than 50 performed by FCC certified shop Measured Standard Acceptable Parameter Value A Value B Tolerance A B Pass Fail Radio Pwr at ant 0 20 W 0 15 W VSWR at ant 1 0 1 Initial value 2 0 1 max Operating value 3 0 1 max Frequency 1 5 kHz Deviation 3 0 kHz 2 4 3 8 kHz XXIII WHF Radio performed by FCC certified shop Measured Standard Acceptable Parameter Value A Value B Tole
19. ptable Item Value Tolerance Pass Fail Check Blower Turns on Yes Blower cleared of debris Accomplished Desiccant replaced Accomplished XIV Barometric Pressure Serial Reference Acceptable Adjustment Adj Value Number Standard A Reading B A B Tolerance Required A B BP1 0 005 Y N BP2 0 005 Y N Note Adjustment is required if A B is greater than the acceptable tolerance Altimeter Setting Check Calculated inHg Reported XV Present Weather Checks Acceptable Field Display Tolerance Pass Fail Present Weather W Empty if no precip Status Sssss 0000 Xnnn 405 420 Lnnn 30 to 50 Knnn 0 to 150 Hnnn 40 to 120 Tnnn Ambient 5 F XVI Lightning Thunderstorm Sensor SN a Check antenna for damage corrosion Accomplished b Check antenna sealant Accomplished c Clean all surfaces Accomplished d Check hardware and cable connections Accomplished XVII Freezing Rain Sensor SN a Check sensor and mast for damage corrosion Accomplished b Check cables and hardware connections Accomplished c Clean all surfaces Accomplished XVIII Hardware Inspection Accomplished All rust corrosion etc has been sanded and touch up paint applied Accomplished Defects System Checked and Verified By Date Time Page 4 of 5 AWOS Annual Technical Performance Record XIX UHF Radio at the Sensor Site performed by FCC certified shop Measured Standard Acceptable P
20. rance A B Radio Pwr at Xmtr 2 5W 1 0 W VSWR at Xmtr 1 0 1 Initial value 2 0 1 max Operating value 3 0 1 max Frequency 1 0 kHz Modulation 8096 65 95 XXIV VHF Radio at the Antenna for cables longer than 50 performed by FCC certified shop Measured Standard Acceptable Parameter Value A Value B Tolerance A B Pass Fail Radio Pwr at ant 1 0 W 0 5 W VSWR at ant 1 0 1 Initial value 2 0 1 max Operating value 3 0 1 max Frequency 1 0 kHz Modulation 65 95 XXV NADIN Interface as applicable Operation of the link confirmed with CLH Accomplished XXVI Monthly and Quarterly Logs Review Review all monthly and quarterly log sheets for compliance with manual Accomplished System Checked and Verified By Date Time AWOS Monthly T Y SN a m lt Technical Performance Record Data Collection Platform Accomplished Toggle maintenance switch l Inspect system and Clean cloud height Day Night Visibility Sensor and Present Weather Sensor optics Remove debris from system Check for mechanical damage Check for movement of wind speed and direction sensors Check obstruction lights Check operation of fan on Temperature RH enclosure Central Data Platform Inspect system and a Check display operation Check keyboard operation Check printer operation check and replace ribbon and paper as necessary Check microphone ope
21. ration Check dial up telephone operation Check VHF radio operation Check system clock adjust if error 1 minute Check speaker operation Check UPS operation if installed Listen to and view the observation Record observation Location Time Wind Visibility Present Weather Sky Condition Temperature Dew Point Alt Setting Remarks General Note any missing parameter or any other obvious failures l Inform AWI of any discrepancies above Note Failures must be logged on Facilities Maintenance Log System Checked and Verified By Date Time AWOS Quarterly Technical Performance Record Notify local users Complete monthly tasks and log Apply touch up paint where needed Drain and clean pressure port Perform CDP monthly procedures Inspect Data Collection Platform Sensor Interface Processor Page 1 of 3 Accomplished Acceptable Item Counts 5 0V Reference 5 0V Reference 0 5 Range 4090 4095 When any values are out of acceptable range the original value shall be noted the adjustments performed and the new values noted separated from the originals by a slash with pass noted VIII Wind Quarterly procedures performed per sensor manual Y N IX Temperature Dew Point Clean probe filter Psychrometer AWOS Time Temperature 1 5 min Temperature 3 0 min 4 5 min 6 0 min 7 5 min Average Within 1 F 4 90
22. rding Forms Three data recording forms are included in this manual The Comprehensive Facility Performance and Adjustment Data Form is to be completed at system commissioning after major repair work and during annual revalidation The Monthly Technical Performance Record Quarterly Technical Performance Record and Annual Technical Performance Record are used during periodic maintenance and include space to record the results of the monthly quarterly and annual maintenance procedures described in the individual sensor and component manuals Installation amp Checkout Manual Rather than a system wide Installation amp Checkout Manual each sensor and AWOS component manual includes specific installation and checkout procedures for that instrument This provides a simple means of easily locating the required procedures for a given component or sensor Page 1 Maintenance Manual Automated Weather Observing System AWOS Operating Instructions Operating instructions for each sensor and AWOS component are found in their respective manuals The Operation chapter of each manual provides full instructions for using a component and interpreting the data where applicable for that instrument Training Program AWOS technicians are fully qualified in electronic and electrical applications with a comprehensive knowledge of the operations testing and maintenance of the AWOS down to the board component level They have the capabilities to evaluat
23. rface Firmware M469051 Present Weather Interface Firmware M469053 Freezing Rain Interface Firmware M469066 Power Supply Assembly M4033 18 Fuse 1 2A Slow Blow M442060 Fuse 10A Slow Blow M442071 Fuse 5A Slow Blow M442070 AC Power PCB Assembly M404802 Ek Data Link Radio 20980 A Barometric Pressure Sensor 7190 Quad Plate Pressure Port M105037 CENTRAL DATA PLATFORM 2090 System Unit 20901 Software 20908 Display 20902 Voice Synthesizer PCB 20903 Speakers 20904 Telephone Voice PCB 20905 Time Standard PCB 20907 Peripheral Interface Unit 20909 NADIN Interface Processor M404806 NADIN Interface Firmware M469054 eb Data Link Radio 20980 A ER Ground to Air Radio 1791 Page 4 Automated Weather Observing System AWOS Maintenance Manual Description Model AWOS SENSORS Wind Direction Sensor 2020 Tail Vane T802000 Pot 5K M480114 Bearings 1 T710100 Wind Speed Sensor 2030 Cup Assembly T800303 Photon Chopper Assembly T801600 Bearings 2 M025057 Skyvane Wind Sensor 2100 Transducer H F Tach Skyvane M100227 Propeller Skyvane M104500 Pot 5K Skyvane M480114 Ultrasonic Wind Sensor unheated 2040 Ultrasonic Wind Sensor heated 2040 H Heater Kit M488274 00 Motor Aspirated Radiation Shield MARS 8190 Temperature Sensor RH Sensor 5190 D Fan M444021 Rain Gauge heated 6021 A Rain Gauge unheated 6011 A Day Night Detector with 8364 C Vis 83339 A with 8364 E Vis M403326 Visibility Sensor 8364 C Emitter Assembly M104863
24. rformed and the new values noted separated from the originals by a slash with pass noted VI Inspect tower and tower lights a 8518 A Foldover Tower apply grease and oil VII Wind Direction SN 2100 2020 2040 a Align to benchmark 2020 amp 2100 Acceptable Tolerance Pass Fail Benchmark direction Visually aligned b Direction linearity test 2020 amp 2100 Display wind direction on LCD display rotate full 360 Any dropouts observed YY Any sudden changes observed Y 360 10 Observed 90 3 Observed 180 3 Observed 270 3 Observed c Bearing wear test Vane turns freely 2020 amp 2100 VIII Wind Speed SN 2100 2020 2040 a Using 1800 rpm run up motor DCP LCD reads Pass Fail 79 81 knots 2030 78 80 knots 2100 b Bearing wear test Cups Propeller turn freely 2020 amp 2100 c Lubricate felt washer 2100 Accomplished d Field Zero Wind Check 2040 0 knots System Checked and Verified By Date Time AWOS Annual Page 2 of 5 Technical Performance Record IX Temperature Humidity SN Psychrometer AWOS Time Temperature 1 5 min Temperature 3 0 min 4 5 min 6 0 min 7 5 min Average Within 1 F 4 55 C A Acceptable Tolerance B A 2 F 1 1 C Temperature Pass Fail Check operation of 8190 MARS fan Visibility SN Rotate sensor to avoid direct sunlight on receiver optics Item Initial Value Calibration New Value Psy
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