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Technical Papers
Please select from the following categories:
General Testing
Triaxial Testing Systems Triaxial and Consolidation Testing Systems
Triaxial Testing Systems
Triaxial and Consolidation Testing Systems
Controllers
STD & ADV Controller Standard Controller Advanced Controller Advanced Controller 1000cc Advanced Controller 100kPa Advanced Controller Air Advanced Controller High Pressure
STD & ADV Controller
Standard Controller
Advanced Controller
Advanced Controller 1000cc
Advanced Controller 100kPa
Advanced Controller Air
Advanced Controller High Pressure
Triaxial Cells
Bishop & Wesley Cell Traditional Triaxial Cell Motorised Cell Rowe Cell Rowe & Barden Cell High Pressure Consolidation Cell
Bishop & Wesley Cell
Traditional Triaxial Cell
Motorised Cell
Rowe Cell
Rowe & Barden Cell
High Pressure Consolidation Cell
Systems
2Hz MINIDYN Static MINIDYN VIS Axial Loading System 100kN 10Hz Hydraulic System Dynamic Hollow Cylinder
2Hz MINIDYN
Static MINIDYN
VIS Axial Loading System
100kN 10Hz Hydraulic System
Dynamic Hollow Cylinder
Data Acquisition
8 Channel Pad DTI Remote Feedback Module Digital Pressure Interface
8 Channel Pad
DTI
Remote Feedback Module
Digital Pressure Interface
Transducers
All Transducers Load Cell Mid Plane Pore Pressure Probe Hall Effect
All Transducers
Load Cell
Mid Plane Pore Pressure Probe
Hall Effect
IEEE Interface
Electrical Connections
Lemo Connectors Serial Connectors
Lemo Connectors
Serial Connectors
Power Supply
Top Caps
Hydraulic Connectors
Computer
Return of Goods to GDS
Glossary of Terms
Useful unit conversions - 134
Extension testing explanation of the forces acting - 129
MINIDYN and ADVTTS40 hardware layout - 126
Maintenance of triaxial cells - 112
STD & ADV product explained and compared - 110
Modified failure envelope cohesion and angle of friction - 104
Static and dynamic axial and radial performance envelopes - 100
Bishop & Wesley Cell vs Motorised cell - 99
Refurbishment and upgrades - 93
Measurement of negative pore pressures - 91
Procedures for unsaturated testing - 90
Consolidation and saturation - 83
Triaxial consolidation method - 73
GDSTAS vs STDTTS - 71
Checking transducer calibrations - 50
Setting the datum of pressure measurement - 48
Using the extension top caps - 47
Low frequency liquefaction studies - 3
Pressure measurement and control - 25
Beeping, error conditions, and system setup - 4
Changing controller power supplies - 95
Comparison between Enterprise, Standard and Advanced controller- 60
De-airing - 105
Error conditions - 52
Hot motors - 18
'O' Rings - 80
Pressure control zero offsets - 66
Pressure fluctuation - 89
Pressure variation in controllers with a stopped end - 67
Problems with membrane keypads - 64
Replacing balls in ball nut - 33
Replacing touch panel keypad - 29
RFM & RFM02 setup and calibration - 44
Volume change under constant pressure - 96
Quick reference guide - 106
PCB boards pre and post sn 2076 - 101
What is P+V+C+R+A - 97
Installing RFM & RS232 cables - 82
Upgrading or changing firmware chips - 81
Removal and reassembly of piston - 58
Setting zero and gain of pressure measurement - 42
Replacement of the 'o' ring seal - 19
Quick reference guide - 107
Motor problems - 92
Changing transducer from Druck to Microguage - 40
Earth path upgrades - 36
Installing RFM module upgrade - 31
Setting gain of pressure measurement Mark III - 15
Setting gain of pressure measurement Mark II - 14
Changing firmware on MkII controller - 9a
Changing firmware on MkIII controller - 9
Checking connectors and setting 5V - 8
PCB removal and replacement - 7
Installation of pore pressure transducer - 6
Removal and reassembly of piston and ball screw - 58a
Reconnection of motor and gearbox to ball screw - 20
Release notes for 200cc 100kPa controller - 59
Use of the air pressure controller - 53
Ballscrew and gearbox alignment - 77
64MPa voltage protection board - 37
Piston upgrade - 45
Fixing collar onto ballscrew connection to gearbox - 34
Speeds for firmware V4.0 - 26
Max force and pressure - 76
Changing bellofram rolling diaphragms - 46
Lower chamber saturation - 5
Installation of pressure transducer yoke - 1
Extension testing - 113
Installation of pore pressure transducer - 2
Overview - 79
Removing axial displacement transducer - 57
Possible drainage and loading conditions - 131
Changing the top bag - 138
Testing using multiple cells - 136
Changing the main ram seal - 137
Removing balanced ram - 132
Setting pressure datum - 69
Balanced ram leaks - 63
Modification to cell top to prevent backlash - 43
Quick reference guide - 111
Quick reference guide - 108
Mark II Changing the load cell range - 41
Tightening and untightening top beam clamping bolts - 32
Changing firmware - 24
Machine specification & performance - 23
Setting gain of load measurement - 21
100kN 10Hz Hydraulic System - Hardware Layout - 127
Performance specification - 38
Changing the main printed circuit board PCB - 130
Parallel and serial data acquisition - 102
User maintenance procedures Sn 1146 onwards - 35a
User maintenance procedures - 35
Main transducer RFM02 setup and calibration - 128
Setting gain of pressure measurement - 13
Calculating sensitivity and full scale output - 125
Accuracy and resolution - 98
Range selection for triaxial testing - 119
Accuracy and Deviator Stress - 103
Damage to load cells - 68
Transducer Access Insert Version - 39a
Installing in a triaxial cell - 39
DIN plug wiring - 109
Use of hall effect transducers - 62
Selecting interface card for use with GDS hardware - 118
Using lemo crimp connectors for soldering connections - 65
Serial cable pin specifications - 135
GDS hardware power requirements - 120
Mains electricity supply requirements - 10
New method of fitting Swagelok connectors to perspex top caps - 123
Fitting Swageloks - 74
GDS recommended computer specifications - 16
Method of shipment - 72
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