User Manuals: Micro-g LaCoste FG5 Gravity Meter

Manuals and User Guides for Micro-g LaCoste FG5 Gravity Meter. We have 1 Micro-g LaCoste FG5 Gravity Meter manual available for free PDF download: Manual

Micro-g LaCoste FG5 Manual

Micro-g LaCoste FG5 Manual (168 pages)

Absolute Gravimeter

Brand: Micro-g LaCoste | Category: Measuring Instruments | Size: 2 MB

Table of Contents

Table of Contents
1
1 Concept and History of the Fg5

7
- The FG5 Absolute Gravimeter
  7
- History
  7
- FG5 Design Features
  8
2 Design: Components and Function

9
- The Dropping Chamber
  10
  - Test Mass
    13
  - Drive Mechanism
    14
  - Service Ring
    14
  - Viewing Port
    15
  - The Drop
    15
- The Interferometer
  17
  - Laser
    17
  - Optics and Beam Path
    17
- The Superspring
  21
  - Superspring Mass
    21
  - Sphere Detector System
    21
- The System Controller
  23
  - Required Hardware
    24
  - Optional Hardware
    24
  - Software
    24
- Electronics
  25
  - Timing System
    25
  - Dropper Controller
    27
  - Superspring Controller
    27
  - Laser Controller
    28
  - Power Supplies
    28
  - Optional Systems
    29
    
    Environmental Sensors
    29
    
    Rotation Monitor
    31
3 How to Set up and Run the Fg5

33
- Setting up the FG5
  33
  - Interferometer
    33
  - Electronics Case
    34
    
    Model AL-1 Laser
    35
    
    Warm up
    35
    
    WEO Model 100 Laser
    36
  - Dropping Chamber Tripod
    36
  - Ion Pump
    38
  - Rough Leveling Interferometer
    39
  - Dropper Verticality
    40
  - Beam Verticality
    40
  - Vertical Adjustment of the Test Beam
    41
  - Reference Height
    43
  - The Superspring
    45
  - Travel Lock
    46
  - Connect Remaining System Cables
    46
  - Superspring Zero-Positioning
    48
  - Fringe Optimizing
    49
  - Dropper Controller
    51
- Running the FG5
  51
  - System Controller Setup
    51
  - Program Setup
    52
- Shutting down the FG5
  52
- Computer
  52
  - Superspring
    54
  - Interferometer
    54
    
    OPTION 1: Model AL-1 Laser
    54
    
    OPTION 2: WEO Model 100 Laser
    54
  - Dropping Chamber
    55
  - Power
    55
- Disassembling and Packing the FG5
  55
  - Electronics
    55
  - System Controller
    56
  - Rotation Monitor (if Included)
    56
  - Dropping Chamber
    57
  - Tripod
    57
  - Superspring
    57
  - Interferometer
    58
  - Turbo Pump (if Used)
    58
4 Adjustment and Maintenance

59
- The Dropping Chamber
  59
  - Replacements and Adjustments
    59
    
    Removing the Dropping Chamber Cover
    59
    
    Replacing the Drive Belt
    60
    
    Replacing the Dropping Chamber Cover
    60
    
    Adjusting the Drive Belt Tension
    61
    
    Replacing the Ferrofluidic Vacuum Feedthrough
    61
    
    Replacing the V-Plate
    62
    
    Replacing the Linear Bearings
    63
    
    Replacing the Shaft Bearings-Drive Pulley
    64
    
    Replacing the Rotary Shaft Encoder
    65
    
    Replacing the Shaft Bearings-Top Pulley
    65
    
    Pumping down the Dropping Chamber
    66
- The Interferometer
  67
  - Troubleshooting the Beam Path
    67
  - Alignment
    67
    
    Laser
    67
    
    Standard Optical Isolator
    67
    
    2-Faraday Isolator Combination
    68
    
    Adjusting Mirrors 1 and 2-The First Two Mirrors
    68
    
    Optical Isolator Replacement
    68
    
    Beam Expander
    70
    
    Collimating Lens
    70
    
    Focusing Lens
    70
    
    Leveling the Tripod Tray
    70
    
    Making the Test Beam Vertical Using the Alcohol Reference Surface
    70
    
    Leveling the Dropper
    71
    
    Adjusting Mirrors 3 & 4 to Steer Beam through Dropper and Make Beam Vertical
    72
    
    Setting the Bubble Levels on the Tripod
    72
    
    Adjusting the Superspring Position and Final Adjustment Mirror
    73
    
    Adjusting the APD Signal Detector
    74
    
    Final Mirror Translation-Getting Beams Overlapped in Fringe Viewer
    74
    
    Adjusting the Fringe Amplitude
    75
    
    Replace All Covers and Tighten All Screws
    75
- The Superspring
  76
  - Replacements and Adjustments
    76
    
    Removing the Service Ring
    76
    
    Removing the Superspring Cover
    76
    
    Replacing the Coil (Linear Actuator)
    76
    
    Replacing the Flexures
    78
    
    The Mass Mainspring/Hanger
    78
    
    Assembling the Superspring
    80
    
    Adjusting the Micro-Switches
    82
    
    Replacing the Focus Lever Motor
    82
    
    The Aneroid Wafer Assembly
    82
    
    The Delta Rods
    82
- Timing System and Data Acquisition
  83
  - Timing
    83
    
    APD Board and Photo Diode Supply Module
    84
    
    Avalanche Photo Diode Printed Circuit Board
    84
    
    Scaler-Counter Printed Circuit Board
    86
    
    Rubidium Oscillator
    90
    
    Universal Time Interval Counter
    92
  - Data Acquisition
    92
- Dropper Controller
  93
  - Dropper Control Modes
    94
    
    Function:
    95
  - Analog Servo
    96
    
    Cart Velocity
    97
    
    Active Sphere Servo
    98
    
    Superspring Connections
    99
    
    Motor Drive Selection
    100
    
    Remote
    101
  - Maintenance Schedule
    102
  - Troubleshooting
    103
  - Interferometer and Laser
    106
    
    Superspring
    109
    
    System Controller
    111
  - Electronics
    112
  - Environmental Sensors Package
    114
    
    Rotation Monitor
    115
- Gravity Site Selection
  116
- Ac Power
  118
- Switching the Ac Power
  119
- Main Power Supply
  120
  - Computer
    121
7 Pumping/Baking the Chamber

123
- Connecting the Turbo Pump to the Dropping Chamber
  124
- Heating the Chamber
  125
- Starting the Ion Pump
  126
8 The Rotation Monitor

127
- The Data Logging System
  128
9 Checklists and Logs

129
- Switching the AC Power
  130
- FG5 Setup
  132
- Dropping Chamber Pump down and Bake-Out
  136
- Dropping Chamber Maintenance
  137
  - Replacing Dropping Chamber Cover
    138
  - Replacing Drive Belt
    139
  - Adjust Belt Tension
    141
  - Replacing V-Plate
    142
  - Replacing the Linear Bearings
    144
  - Replacing Shaft Bearings (Drive Pulley)
    146
  - Replacing Shaft Bearings (Top Pulley)
    147
  - Replacing Rotary Shaft Encoder
    148
- Interferometer Alignment
  150
  - Superspring Maintenance
    151
  - Removing Service Ring
    152
  - Replacing Flexures
    154
  - Assembling Superspring
    156
  - Replacing Focus Lever Motor
    158
  - Adjusting Micro-Switches
    159
10 Index

163

Advertisement

Advertisement

Related Products

Micro-g LaCoste Categories

Measuring Instruments

More Micro-g LaCoste Manuals