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Kinemetrics EpiSensor FBA ES-T User Manual
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User Guide
EpiSensor
Force Balance
Accelerometer
Model FBA ES-T
Document 301900
Revision D
October 2005
2
Table of Contents
Default Chapter
3
Table of Contents
3
1 Introduction
17
The Episensor FBA ES-T
17
Inspecting the Episensor
18
Figure 1: the Episensor
18
2 Installation Basics
19
Requirements for Installation
19
Required Tools
19
Required Supplies
20
Required Equipment
20
Mounting & Orienting the Episensor
20
Figure 2: Episensor Mounting Dimensions
21
Figure 3: Drilling Episensor Mounting Hole
22
Required Cables
23
Grounding the Episensor
23
Safety First
23
Emi/Rfi
24
Powering the Episensor
25
Zero-Adjusting the Episensor
26
Methods of Measuring the DC Offset
26
Performing the Zero Adjustment
26
Note on Full-Scale Range
27
Thermal Insulation Shield (Optional)
27
Table 1: Reasonable Zero Offset Voltages
27
Figure 4: Episensor & Packaging Components
28
Figure 5: Large Packaging Piece Installed
29
Figure 6: Cable Installed
29
Figure 7: Second Packaging Piece Installed over Connector Shell
30
Figure 8: Final Packaging Piece Installed
31
3 Operating Basics
33
Polarity Conventions
33
Episensor External Features
34
Required Power
34
Figure 9: the Episensor
34
Performing a Functional Test with an Altus Recorder
35
Figure 10: Display of Functional Test
35
Sensor Response Test
36
Episensor Configuration
36
Figure 11: Display of Functional Test Using Software Released Prior to
36
Opening the Episensor Case
37
Pin Numbering System
37
Jumper Selectable Options
38
Setting the Full-Scale Range
38
Figure 12: Pin Numbering System
38
Figure 13: Feedback Board
39
Table 2: Range/Sensitivity Calculations
39
Figure 14: Full-Scale Range Jumper Settings
40
Headers and Connectors on Oscillator Board
41
Figure 15: Top View of Oscillator Board
41
Output Voltage Level
42
Figure 16: Bottom View of Oscillator Board with Headers Indicated
42
Power & Noise Configurations
43
Table 3: Output Voltage-Level Jumper Settings
43
Table 4: Amplifier Configuration
43
Figure 17: Jumper Configurations
44
Low-Noise Power Control
44
Table 5: Function of Headers X21 and X22
44
Power Supply Options
45
Calibration Coil
45
Calibration Coil Disconnect
45
Table 6: Calibration Coil Disconnect Header
45
Calibration Coil Test Connector
46
Closing the Episensor Case
46
Table 7: Calibration Coil Test Headers
46
4 Maintenance
49
Recommended Maintenance
49
Adjust the Accelerometers
49
Complete a Functional Test
49
Calibration
49
Desiccant Replacement
50
Troubleshooting and Repair
50
5 Reference
51
Theory of Operation
51
Figure 18: Simplified Block Diagram of an Accelerometer
51
Working Principle
52
Features
53
Pole Zero Representation of the Episensor
54
Figure 19: Amplitude, Phase, and Step Response of the Episensor
55
Polarity Conventions
56
Figure 20: X, y and Z Coordinates
57
Electrical Interface
58
Table 8: Input Connections
58
6 Advanced Installations
59
CE Compliant Installations
59
Using Episensors with Altus Instruments
59
The Etna
60
The K2 & Mt. Whitney
60
Dual Gain Systems
60
Long Cables
61
User-Supplied Cable
62
Grounding
62
Table 9: Episensor Cabling Requirements (1 Foot = 0.3048 Meters)
62
Use with Non-Kinemetrics Data Loggers
64
Power Supply
64
Table 10: Current Requirements
65
Output Voltage
66
Calibration Sequence
66
Table 11: Current Requirements
66
Ground Loop Prevention
67
Custom Cable Assembly
68
Figure 21: Episensor to Altus Recorder Cable
68
Table 12: Parts for Recorder Mating Connector Assembly
69
Figure 22: Parts for Recorder-End Mating Connector Assembly
70
Figure 23: Preparing 3/8"-Wide Foil Tape from 1" Foil Tape
70
Cable Assembly Instructions
71
Identical Assembly Procedures
71
Table 13: Part Order, Recorder Cable End
71
Figure 24: Recorder Cable End with Outer PVC Jacket Removed
72
Figure 25: Recorder Cable End with Rope and Cellophane Removed
72
Figure 26: Detail of Foil Shields, Drain Wires and Foil Tape
73
Figure 27: Drain Wires Twisted Together
74
Figure 28: Drain Wire-To-Black Wire Connection
74
Figure 29: Outer Foil Tape and Drain-Wire Shrink Tubing
75
Figure 30: Schematic of Episensor Cable to both Mating Connectors
75
Final Assembly of the Recorder End
76
Figure 31: Foil Tape and Stripped-And-Tinned Wires
76
Figure 32: Wrapping the Connection with PVC Tape
76
Figure 33: Wrapping Foil Tape Around Outside of the Connection
77
Figure 34: Slipping Shrink-N-Shield Tubing into Place
77
Figure 35: Shrink-N-Shield Tubing in Correct Position (after Shrinking)
77
Testing Connector Assembly #1
78
Figure 36: Completed Assembly of Recorder-End of Cable 840356
78
Initial Assembly of the Episensor End
80
Figure 37: Parts for Episensor-End Mating Connector Assembly
80
Table 14: Parts for Episensor-End Mating Connector Assembly
80
Figure 38: Preparing 3/8"-Wide Foil Tape from 1" Foil Tape
81
Final Assembly of the Episensor End
82
Figure 39: Example of a Daisychain
82
Table 15: Slide Parts over Cable Jacket in this Order
82
Figure 40: Connection Wrapped with PVC Tape
83
Figure 41: Wrapping Foil Tape Around Outside of the Connection
84
Figure 42: Cable with Shrink-N-Shield Tubing (Outer Tubing Trimmed Back to Show Screen Mesh)
84
Figure 43: Shrink-N-Shield Tubing Shrunk and in Position
85
Figure 44: Completed Assembly of Episensor End of Cable 840356
85
Testing Connector Assembly #2
86
7 Appendix
89
Table 16: Episensor Specifications
89
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Kinemetrics EpiSensor FBA ES-T Specifications
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Brand
Kinemetrics
Model
EpiSensor FBA ES-T
Category
Measuring Instruments
Language
English
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