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Technical Papers

 
   
  Technical papers relevant to GDS systems with many available for download as pdf.  
   
     
  Product Helpsheets  
   
  Helpsheets are the GDS FAQ documents designed to be a one stop self help section.  
 

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  Video Help  
   
  Both hardware and software videos designed for use by both existing customers and potential customers.  
   
 
 
GDS Helpsheets in Numerical order
 

GDSLAB - HASP dongle troubleshooting - 139

Rowe & Barden Cell - Changing the top bag - 138

High Pressure Consolidation Cell - Changing the main ram seal - 137

Rowe & Barden Cell - Testing using multiple cells - 136

Serial Connectors - Serial cable pin specifications - 135

Triaxial Testing Systems - Useful unit conversions - 134

GDSLAB Reports - Upgrading - 133

2Hz MINIDYN - Removing balanced ram - 132

Rowe Cell - Possible drainage and loading conditions - 131

8Channel Pad - Changing the main printed circuit board PCB - 130

Triaxial Testing Systems - Extension testing explanation of the forces acting - 129

Remote Feedback Module - Main transducer RFM02 setup and calibration - 128

100kN 10Hz Hydraulic System - Hardware Layout - 127

Triaxial Testing Systems - MINIDYN and ADVTTS40 hardware layout - 126

All Transducers - Calculating sensitivity and full scale output - 125

GDSLAB and GDSLAB Reports quick installation guide - 124

Top Caps - New method of fitting Swagelok connectors to perspex top caps - 123

GDSLAB - Installing drivers for a GDS parallel pad - 121

Power Supply - GDS hardware power requirements - 120

Load Cell - Range selection for triaxial testing - 119

IEEE Interface - Selecting interface card for use with GDS hardware - 118

Hasp Security Key - Remote update of GDS security key memory - 117

GDSLAB - Updating to a newer version - 116

GDSLAB - Quick installation guide and check list - 115

Traditional Triaxial Cell - Extension testing - 113

Triaxial Testing Systems - Maintenance of triaxial cells - 112

Static MINIDYN - Quick reference guide - 111

Triaxial Testing Systems - STD & ADV product explained and compared - 110

Hall Effect - DIN plug wiring - 109

VIS Axial Loading System - Quick reference guide - 108

Advanced Controllers - Quick reference guide - 107

Standard Controller - Quick reference guide - 106

STD & ADV Controller - De-airing - 105

Triaxial Testing Systems - Modified failure envelope cohesion and angle of friction - 104

Load Cell - Accuracy and Deviator Stress - 103

8Channel Pad - Parallel and serial data acquisition - 102

Standard Controller - PCB boards pre and post sn 2076 - 101

Triaxial Testing Systems - Static and dynamic axial and radial performance envelopes - 100

Triaxial Testing Systems - Bishop & Wesley Cell vs Motorised cell - 99

All Transducers - Accuracy and resolution - 98

Standard Controller - What is P+V+C+R+A - 97

STD & ADV Controller - Volume change under constant pressure - 96

STD & ADV Controller - Changing controller power supplies - 95

Triaxial Testing Systems - Refurbishment and upgrades - 93

Advanced Controllers - Motor problems - 92

Triaxial Testing Systems - Measurement of negative pore pressures - 91

Triaxial Testing Systems - Procedures for unsaturated testing - 90

STD & ADV Controller - Pressure fluctuation - 89

CSWS - System configuration - 88

CSWS - Test Specifications - 87

CSWS - Interpretation of results - 85

GDSLAB - Overview - 84

Triaxial Testing Systems - Consolidation and saturation - 83

Standard Controller - Installing RFM & RS232 cables - 82

Standard Controller - Upgrading or changing firmware chips - 81

STD & ADV Controller - 'O' Rings - 80

Motorised Cell - Overview - 79

CSWS - Geophone Hz compared - 78

Advanced Controller High Pressure - Ballscrew and gearbox alignment - 77

Bishop & Wesley Cell - Max force and pressure - 76

Hydraulic Connectors - Fitting Swageloks - 74

Triaxial Testing Systems - Triaxial consolidation method - 73

Return of Goods to GDS - Method of shipment - 72

Triaxial Testing Systems - GDSTAS vs STDTTS - 71

GDSTTS - Enabling controlled hydraulic gradient v7.10 and above - 70

2Hz MINIDYN - Setting pressure datum - 69

Load Cell - Damage to load cells - 68

STD & ADV Controller - Pressure variation in controllers with a stopped end - 67

STD & ADV Controller - Pressure control zero offsets - 66

Lemo Connectors - Using lemo crimp connectors for soldering connections - 65

STD & ADV Controller - Problems with membrane keypads - 64

2Hz MINIDYN - Balanced ram leaks - 63

Hall Effect - Use of hall effect transducers - 62

HTBasic - Error 163 Interface not present - 61

STD & ADV Controller - Comparison - 60

Advanced Controller 100kPa - Release notes for 200cc 100kPa controller - 59

Advanced Controller 1000cc - Removal and reassembly of piston and ball screw - 58a

Standard Controller - Removal and reassembly of piston - 58

Motorised Cell - Removing axial displacement transducer - 57

MINIDYN - Investigating IEEE error conditions on startup - 56

HTBasic - Use of function keys - 55

GDSTTS - Investigating error conditions on system start v7 - 54

Air Pressure Controller - Use of the air pressure controller - 53

STD & ADV Controller - Error conditions - 52

Triaxial Testing Systems - Checking transducer calibrations - 50

GDSTTS - Investigating error conditions on system start - 49

Triaxial Testing Systems - Setting the datum of pressure measurement - 48

Triaxial Testing Systems - Using the extension top caps - 47

Bishop & Wesley Cell - Changing bellofram rolling diaphragms - 46

Advance Controller High Pressure - Piston upgrade - 45

STD & ADV Controller - RFM & RFM02 setup and calibration - 44

2Hz MINIDYN - Modification to cell top to prevent backlash - 43

Standard Controller - Setting zero and gain of pressure measurement - 42

VIS Axial Loading System - Mark II Changing the load cell range - 41

Advanced Controllers - Changing transducer from Druck to Microguage - 40

Mid Plane Pore Pressure Probe - Transducer Access Insert Version - 39a

Mid Plane Pore Pressure Probe - Installing in a triaxial cell - 39

Dynamic Hollow Cylinder - Performance specification - 38

Advanced Controller High Pressure - 64MPa voltage protection board - 37

Advanced Controllers - Earth path upgrades - 36

DTI - User maintenance procedures Sn 1146 onwards - 35a

DTI - User maintenance procedures - 35

Advanced Controller High Pressure - Fixing collar onto ballscrew connection to gearbox - 34

STD & ADV Controller - Replacing balls in ball nut - 33

VIS Axial Loading System - Tightening and untightening top beam clamping bolts - 32

Advanced Controllers - Installing RFM module upgrade - 31

GDSTTS - Release notes v6 use with DTI - 30

STD & ADV Controller - Replacing touch panel keypad - 29

GDSTTS - Calculations relating to the triaxial cell - 28

HTBasic - IEEE handling problem - 27b

GDSTTS - Installation procedures HTB v3 - 27a

GDSTTS - Installation procedures HTB v2 - 27

Advanced Controller High Pressure - Speeds for firmware V4.0 - 26

Triaxial and Consolidation Testing Systems - Pressure measurement and control - 25

VIS Axial Loading System - Changing firmware - 24

VIS Axial Loading System - Machine specification & performance - 23

VIS Axial Loading System - Setting gain of load measurement - 21

Advanced Controller 1000cc - Reconnection of motor and gearbox to ball screw - 20

Standard Controller - Replacement of the 'o' ring seal - 19

STD & ADV Controller - Hot motors - 18

Computer - GDS recommended computer specifications - 16

Advanced Controllers - Setting gain of pressure measurement Mark III - 15

Advanced Controllers - Setting gain of pressure measurement Mark II - 14

Digital Pressure Interface - Setting gain of pressure measurement - 13

HTBasic - Security Codes - 11

Power Supply - Mains electricity supply requirements - 10

Advanced Controllers - Changing firmware on MkII controller - 9a

Advanced Controller s - Changing firmware on MkIII controller - 9

Advanced Controllers - Checking connectors and setting 5V - 8

Advanced Controllers - PCB removal and replacement - 7

Advanced Controllers - Installation of pore pressure transducer - 6

Bishop & Wesley Cell - Lower chamber saturation - 5

STD & ADV Controller - Beeping, error conditions, and system setup - 4

Triaxial Testing Systems - Low frequency liquefaction studies - 3

Traditional Triaxial Cell - Installation of pore pressure transducer - 2

Bishop & Wesley Cell - Installation of pressure transducer yoke - 1

 
 
 
 
 
 
GDS Instruments is an ISO 9001:2000 accredited company.