Doppler Weather Radar - METNET - India Meteorological Department

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APPENDIX C C.1. Calibration procedures of panel meters Control panel meters are to be calibrated. Meter A1P1 indicates filament current. Similar meter is used for focus coil current. Meter P3 is for indication of Ion pump current.P5 indicates the charging voltage. Meter P4 is used for series of 15 parameters by means of a selection switch. The following procedure is to be followed to calibrate the above meters as given in C.1 below. Figure C.1. Tx Control Panel A1, Panel Meters, Location of Controls and Indicators 1. Set the H.V.Power Circuit breaker Q1, Auxiliary circuit breaker Q2, and cabinet light power circuit breaker Q3 off. 2. Open the cabinet doors. 3. Remove the charging switch module, A10 from TX bay. 4. Close the right-bay inner door. Set the cabinet light power circuit breaker Q3 and Auxiliary circuit breaker Q2, and Auxiliary circuit breaker Q2 on and place the Tx in maintenance mode. 5. Calibrate the +5VDC, +15VDC, -15VDC, +28VDC, and 40 VDC AND Ion pump voltage according to meter calibration procedures No.5 to No.9 as described in 6.3 of MEHB 10- 511. 72
6. Wait for ten minutes. Calibrate the Filament Power Supply Inverse Voltage and meter voltage according to meter calibration procedures No.11 No.12 as described in 6.3 of MEHB 10-511. Table C.1. Location and Calibration of panel meters No. Position Parameter 1 A1P1 Filament Current Calibration method Adjust PS1A1RP10 to make the reading of A1P1 equal to the filament current value on the nameplate of klystron V1. Then, use a multi-meter to measure TP2 of A1A2 and obtain a value X. The values Y, Z and M are obtained from the formulas Y=(25X)/27.8, Z=32X/27.8 and M=50X/27.8. Adjust potentiometer A1A2R8 while monitoring pin 5 of A1A2U8 with the multi-meter and set the voltage equal to Y. Adjust potentiometer A1A2R20 while monitoring pin 9 of A1A2U8 with the multi-meter and set the voltage equal to Z. Adjust potentiometer A1A2R5 while monitoring pin 13 of A1A2U8 with the multi-meter and set the voltage equal to M. With these steps, the calibration of the Filament current protection is completed. The over-current value of the Filament is typically 32A and the under-current value is typically 25A. 2 A1P2 Focus Coil Current 3 A1P3 Ion Pump Current 4 A1P4 Charge Voltage Adjust PS2A1RP7 to make the reading of A1P2 equal to the focus coil current value on the nameplate of klystron V1. Then, measure TP3 and obtain a value X. similar to the calibration method for Filament Current protection. Y and Z can be obtained according to the formulas Y= (20X) /22 and Z= 24X /22. Adjust potentiometer A1A2R6 while monitoring pin 5 of A1A2U6 with the multi-meter and set the voltage equal to Y. Then, adjust potentiometer A1A2R7 while monitoring pin 2 of A1A2U6 with the multi-meter and set the voltage equal to Z. With these steps, the protection circuits for Focus Coil Current are now calibrated. The overcurrent value of Focus Coil Current is typically 24A and the undercurrent value is typically 20A. No calibration is necessary. Measure the PFN Charge voltage at A12XS6 using an oscilloscope and read the value. Adjust A1A2R3 to make the reading of A1P4 equal to the value. 5 A1P5/ SA9-1 6 A1P5/ SA9-2 +5 VDC Adjust A1A2R27 to make the reading of A1P5 equal to 5 volts at position 1 of A1SA9. +15 VDC Adjust A1A2R28 to make the reading of A1P5 equal to 15 volts at position 2 of A1SA9. 7 A1P5/ -15 VDC Adjust A1A2R29 to make the reading of A1P5 equal to 15 volts at 73
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Ministry of Earth Sciences INDIA ME
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Preface Introduction Definitions Pu
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3.8 To copy RAW DATA 35 3.9 Procedu
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B.3.3 Velocity Products 69 B.3.4 Hy
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PREFACE India Meteorological Depart
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DEFINITION An important aspect of a
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MONITORING OF DWR SYSTEM CHAPTER 1
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Before controlling radar operations
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5. Power Cabinet: “SERVO POWER AM
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9. Checking real time displays:-The
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2. In Modem, PMA always shows off w
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This can be done by “telnet” co
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drwxr-xr-x 3 501 500 4096 Aug 10 02
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Figure 1.8 Connecting to MAIN serve
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Thus now the tasks are configured a
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STEP 1 : Invoke “iris” though t
Page 33 and 34: STEP 6 : Skip time : This is the ti
Page 35 and 36: 3. Edit the Product as needed , the
Page 37 and 38: (ii) SC. (E) In-Charge Radar Lab, D
Page 39 and 40: Station and print-out (except Daily
Page 41 and 42: 2.2.5. A-log book Details of all ad
Page 43 and 44: Table 2.8 VPN connectivity status S
Page 45 and 46: Step-II. connected Copy image files
Page 47 and 48: 3.7. To search for a file [operator
Page 49 and 50: PCO name: IMD-B, TCO name: IMD-B PR
Page 51 and 52: # Filename: transmet_gif # Sends fi
Page 53 and 54: 9. To liaise with other DWR station
Page 55 and 56: • Detection of deterioration caus
Page 57 and 58: ack-mounted modules which do not re
Page 59 and 60: Screenshot 2 : Calibration Control
Page 61 and 62: Antenna Waveguide Switch, Circulato
Page 63 and 64: 4.3.3 Bitex data point configuratio
Page 65 and 66: APPENDIX A AN OVERVIEW OF DOPPLER W
Page 67 and 68: A.1.1. Future IMD Radar Network pla
Page 69 and 70: IRIS/Display Installed at remote wo
Page 71 and 72: APPENDIX B WSR 98D/S DWR SYSTEM CHA
Page 73 and 74: e. Elevation limits -- Upper and lo
Page 75 and 76: B.1.9. Calibrations and health moni
Page 77 and 78: B.2.6. Unambiguous range a. Reflect
Page 79 and 80: The System is capable of generating
Page 81 and 82: 1. System generates hail, thunderst
Page 83: 1.5. There is provision of DVD Writ
Page 87 and 88: SA9-15 Current at position 15 of A1
Page 89 and 90: Test procedure (1) Type the “zaut
Page 91 and 92: 4. Observe that the PFN voltage goe
Page 93 and 94: Table D.1. PPI and RHI scanning typ
Page 95 and 96: According to the need of IMD, purpo
Page 97 and 98: Chennai@8min, Machilipatnam, Vishak
Page 99 and 100: D.2.5. Scan strategies being follow
Page 101 and 102: High Voltage (Power On) Avoid conta
Page 103 and 104: Average power densities less than 5
Page 105 and 106: E.3. Antenna/Pedestal Safety WARNIN
Page 107 and 108: ACKNOWLEDGEMENTS Several experts ha
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