CGâ3/3M AUTOGRAV - Scintrex

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Getting StartedFigure 8Adjusting the TripodTo LevelYou have two options for leveling the Y-axis of the CG-3/<strong>3M</strong>. The fastest wayto level the meter is to adjust both rear screws on the tripod as outlined inStep 7. The other option for high precision microgravity measurements is toset one of the rear screws in the middle of its range and tape over it. Adjustthe other rear screw until the Y-axis is level. This method ensures that the elevationof the CG-3/<strong>3M</strong> sensor relative to the tripod is strictly maintained.2-32 Autograv CG–3 Manual
Setting up the Tripod7. Adjust the Y-axis first by turning the two rear screws on the tripod andviewing the display and bubble meters.If you need to level the Y-axis in the positive direction, then turn therear screws towards the front of the instrument. (See Figure 8 above.)This procedure of rotating both screws in opposite directions at thesame time is the most efficient way to level about the Y-axis.8. After the Y-axis is level, adjust the X-axis by turning the front screw onthe tripod and viewing the display and bubble meters.If you need to level the X-axis in the positive direction, then turn thefront screw clockwise. (See Figure 8 on page 2-32.)TRIPOD EXTENDER LEGSThe tripod comes with three extender legs which may be used under softsoil conditions.How ToTo set up1. Place one extender leg over one of the pointed bottom legs of the tripodwith the tab of the extender leg facing the outside of the tripod.This tab is available so that you can step on the tab to dig the shaft ofthe leg into the soil.2. Insert the 8-32 hex bolt through the openings of the legs. Ensure that thehead of the nut fits into the recessed slot on the extender leg as thisenables you to securely tighten the bolt.3. Place the washer and the black wing nut onto the bolt and slightlytighten the wing nut.4. Adjust the angle of the extender leg and tighten the wing nut.5. Repeat steps 1 through 4 for the other two extender legs.Autograv CG–3 Manual 2-33
Page 1 and 2: CG-3/3M AUTOGRAVAUTOMATED GRAVITY M
Page 3 and 4: Autograv CG-3Table of ContentsSecti
Page 5 and 6: Section 5: BATTERY AND CHARGERLoss
Page 7 and 8: Appendix C: INTERFACING WITH THE AU
Page 9 and 10: Autograv CG-3Section1INSTRUMENT OVE
Page 11 and 12: Autograv CG-3 Manual 1-3Introductio
Page 13 and 14: Autograv CG-3Section2GETTING STARTE
Page 15 and 16: Starting up the AutogravSTARTING UP
Page 17 and 18: Powering up the Autograv4. Remove t
Page 19 and 20: Using the KeypadUSING THE KEYPADFig
Page 21 and 22: Using the KeypadKey506AUXDescriptio
Page 23 and 24: The DisplayTHE DISPLAYPARAMETER SET
Page 25 and 26: The DisplayModifying ParametersThe
Page 27 and 28: The DisplayHow ToAutograv CG-3 Manu
Page 29 and 30: The DisplayFigure 6Autograv Softwar
Page 31 and 32: Initializing the Instrument Paramet
Page 41 and 42: The Display during ReadingsPress th
Page 43: Setting up the TripodTo set up1. Se
Page 47 and 48: Temperature CompensationTEMPERATURE
Page 49 and 50: Temperature CompensationHow ToAutog
Page 51 and 52: Temperature CompensationTo AdjustAd
Page 53 and 54: Adjusting Drift CorrectionsADJUSTIN
Page 55 and 56: Adjusting Drift CorrectionsR2,T20.
Page 57 and 58: Adjusting Drift Corrections503. Pre
Page 59 and 60: Recalling DataRECALLING DATA▲▲
Page 61 and 62: Recalling Data▲If the DATA or INF
Page 63 and 64: Recalling DataRECALLING DATA IN THE
Page 65 and 66: Autograv CG-3Section3INSTRUMENT PAR
Page 67 and 68: INITIALISE MenuINITIALISE MENUeTher
Page 69 and 70: INITIALISE MenuThe 48K represents t
Page 71 and 72: INITIALISE MenuExample: If you sele
Page 73 and 74: INITIALISE Menuee3. Press the CHANG
Page 75 and 76: INITIALISE MenuNotes:If you select
Page 77 and 78: INITIALISE Menu13. TIME HH:MM:SSYou
Page 79 and 80: STN SEPSTN SEPThere are no submenus
Page 81 and 82: AUTOGRAV SETUP1. MODEYou can select
Page 83 and 84: AUTOGRAV SETUPe 6e9. Press the ENTE
Page 85 and 86: AUTOGRAV SETUP4. CAL. AFTERYou can
Page 87 and 88: AUTOGRAV SETUPTIDE CORRECTIONCHG? >
Page 89 and 90: AUTOGRAV SETUPe4. Key in the value.
Page 91 and 92: AUTOGRAV SETUPeee4. Press the CHANG
Page 93 and 94: AUTOGRAV SETUP11. INITIAL CONSTANTS
Page 95 and 96:
OUTPUTNotes: ▲ To dump data which
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OUTPUTTRACE1: > NNNNSELECT/ENTERYou
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OUTPUTea. Select the multiplier or
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OUTPUTg) START PLOT13. Press the 0
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OUTPUT7. CR DELAYYou can set the ca
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LOCK AUX.LOCK AUX.The LOCK AUX mode
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Autograv CG-3Section4FIELD OPERATIO
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Parameter Setup and Keypad Operatio
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Recording DataThe auto-rejection fe
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Operation Hints▲▲▲Ensure that
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Operation Hintsis reduced by signal
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Dumping Data1. After the instrument
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Autograv CG-3Section5BATTERY AND CH
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Batterypower to the instrument. Onc
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ChargerREPLACINGYou should replace
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Charger3. Change the charger fuse t
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How to Change a Battery3. Insert th
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Autograv CG-3Section6MAINTENANCEThe
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Drift Correction▲▲tion feature
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Tilt Correction Adjustment2. Place
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Tilt Correction AdjustmentMaintenan
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Tilt Correction AdjustmentFine Adju
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Tilt Correction AdjustmentCoarse Ad
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Tilt Correction AdjustmentAdjusting
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Recalibrating the GravimeterA linea
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Autograv CG-3Section7TROUBLESHOOTIN
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Autograv CG-3Section8REFERENCE INFO
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Standard AccessoriesSTANDARD ACCESS
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Instrument Parts ListINSTRUMENT PAR
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Warranty and RepairWARRANTY AND REP
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Autograv CG-3AppendixATHEORY OF OPE
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Introductionever, since there is no
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IntroductionCONTROL CONSOLE AND SOF
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Spring Service Life and Reading Ran
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Spring Service Life and Reading Ran
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Processing of the Gravity SignalCor
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Compensation and CorrectionsRU( t 2
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Compensation and CorrectionsIf the
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Compensation and CorrectionsGRAVITY
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Autograv CG-3AppendixBELASTIC HYSTE
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Figure B-1 Elastic Hysteresis Effec
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Autograv CG-3AppendixCINTERFACING W
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IGS OutputDCE to DTEFunction Pin Pi
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IGS OutputMaleNORMAL5 5 Clear to Se
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Autograv CG-3AppendixDINITIAL CONST
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Autograv CG-3IndexIndexAAccessories
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FNotebook feature 4-5Output 2-37Rec
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MKKey functions 2-6, 2-7Enter mode
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RData 2-37DATA BITS 3-37DUMP ALL DA
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WTEC A-15EffectsBatteries 5-2Termin
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