LaCoste & Romberg LLC
The first name in gravity since 1939

MODEL U UNDERWATER METER MANUAL

TABLE OF CONTENTS

CHAPTER 1 - INTRODUCTION

• Use of Underwater Gravity Meters
• Development of the Underwater gravity Meter

CHAPTER 2 - HARDWARE DESCRIPTION

• Inner Sphere
•      Gravity Sensor
•      Thermostat Module
•      Levels
•      Digital Shaft Encoder
• Outer Sphere
•      Large Underwater Sphere
•      Small Underwater Sphere
•      Lightweight Surface Housing
• Lead Weights
• Gimbal System
• Depth Gauge
• Flood Detector
• Tilt Sensors
• Cable and Cable Termination
• Electronics
• Computer Controller
• Power Control Unit

CHAPTER 3 - PRINCIPLE OF OPERATION

• Design
• Physics of the Sensor
• Zero Length Spring
• Meter Reading Methods

CHAPTER 4 - SYSTEM CONTROLLER

• Software Installation
• Windows
• Displays
       Gravity Mode Display
            Slider Windows
            Trace Windows
            Control Window
       Manual Mode Display
• Command Menus
       Command Tree Diagram
       Command Descriptions
            Files Commands
            Edit Commands
            Manual Mode Commands
       Gravity Mode Commands
       Other Commands
• Files and Switches
       Editing File and Switch Parameters
       Meter Parameters Files
       Gravity Parameters File
       Configuration File
       Software Switches
       Gravity Data Files
• Gravity Recording
• Multitasking
• Digital Encoder Initialization
• Digital Status Information

CHAPTER 5 - FIELD OPERATIONS

• Hoists
• Cables
• Shockmounting
• Temperature
• Navigation
• Gravity Readings
• Standard Spares Kit
• Training

CHAPTER 6 - CHECKS & ADJUSTMENTS

• Opening the Inner Sphere
• Changing Main Electronics Card
• Electronic Level Settings
    Long Level Zero
    Cross Level Zero
    Checking the Reading Line
    Gimbal Zero Adjustments
• Main Electronics Card Adjustments
    Temperature Sensor Adjustments
    Beam Zero Adjustment
    Beam Gain Adjustment
    Reading Line Adjustment
• Cheat Voltage Calibration
• Bubble Level Adjustments
• Counter Synchronization
• Depth Gauge Calibration

CHAPTER 7 - CABLE TERMINATION

CHAPTER 8 - CIRCUIT DIAGRAMS

Product Information

Copyright © 1998 LaCoste and Romberg LLC