DH Instruments GFS2102 User manual

© 2007 DH Instruments, a Fluke Company
GFS2102™
Gravimetric Flow Standard
Operation and Maintenance Manual

GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company
Pressurized gases are potentially hazardous. Energy stored in these gases can be released unexpectedly
and with extreme force. Pressurized systems should be assembled and operated only by personnel who have
been instructed in proper safety practices.
©2007 DH Instruments, a Fluke Company All rights reserved.
Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any
form or by any means, electronic or mechanical, for any purpose, without the express written permission of DH Instruments, a
Fluke Company 4765 East Beautiful Lane Phoenix Arizona 85044-5318 USA.
DH Instruments makes sincere efforts to ensure the accuracy and quality of its published materials; however, no warranty,
expressed or implied, is provided. DH Instruments disclaims any responsibility or liability for any direct or indirect damages
resulting from the use of the information in this manual or products described in it. Mention of any product or brand does not
constitute an endorsement by DH Instruments of that product or brand. This manual was originally composed in English and was
subsequently translated into other languages. The fidelity of the translation cannot be guaranteed. In case of conflict between the
English version and other language versions, the English version predominates.
DH Instruments, DH, DHI, GFS2102, GFS Tools, AMH, LCM, MFC-CB, molbloc and molbox are trademarks, registered and
otherwise, of DH Instruments, a Fluke Company
Swagelok and Nupro are registered trademarks of the Swagelok Company.
Krytox is a registered trademark of the Dupont de Nemours Company.
Windows, Excel, Word are registered trademarks of the Microsoft Corporation.
Products described in this manual are manufactured under international patents and one or more of the following U.S.
patents: 6,701,791, 5,142,483, 5,257,640, 5,331,838, 5,445,035. Other U.S. and international patents pending.
Document No. 550149a
071129
Printed in the USA

TABLE OF CONTENTS
Page I © 2007 DH Instruments, a Fluke Company
T
TA
AB BL LE E O OF F C
CO
ON NT TE EN NT TS S
TABLE OF CONTENTS...............................................................I
TABLES................................................................................VII
FIGURES................................................................................IX
ABOUT THIS MANUAL ...........................................................XIII
1. INTRODUCTION .................................................................1
1.1 SPECIFICATIONS ...................................................................................................................................1
1.1.1 GFS2102 GENERAL SPECIFICATIONS.......................................................................................................1
1.1.2 GFS2102 MASS BALANCE SPECIFICATIONS ...........................................................................................2
1.1.3 LCM AMBIENT CONDITIONS MEASUREMENT SPECIFICATIONS...........................................................2
1.1.3.1 PRT BALANCE AMBIENT TEMPERATURE MEASUREMENT ................................................................2
1.1.3.2 TH PROBE REFERENCE GAS CYLINDER SURROUNDINGS AMBIENT CONDITION
MEASUREMENT .......................................................................................................................................2
1.1.3.3 INFRARED PROBE REFERENCE GAS CYLINDER SURFACE TEMPERATURE MEASUREMENT.....2
1.1.3.4 AMBIENT CONDITIONS MEASUREMENT...............................................................................................2
1.1.3.5 BALANCE READING TIME MEASUREMENT...........................................................................................2
1.1.4 MFC-CB SPECIFICATIONS ..........................................................................................................................3
1.1.5 FLOW MEASUREMENT SPECIFICATIONS.................................................................................................3
2. SYSTEM OVERVIEW ...........................................................5
2.1 BALANCE AND AMH-GFS2102..............................................................................................................6
2.2 REFERENCE GAS CYLINDER ASSEMBLY...........................................................................................8
2.2.1 REFERENCE GAS CYLINDER.....................................................................................................................8
2.2.2 CYLINDER SUPPORT...................................................................................................................................9
2.2.3 REFERENCE GAS CYLINDER CONNECTOR...........................................................................................10
2.2.4 REGULATOR ASSEMBLY..........................................................................................................................11
2.2.5 REFERENCE GAS CYLINDER CASE ........................................................................................................11
2.3 GFS DRAFT ENCLOSURE AND VIBRATION ISOLATION TABLE.....................................................12
2.4 LABORATORY CONDITIONS MONITOR (LCM)..................................................................................13
2.5 MFC-CB.................................................................................................................................................13
2.6 GFS TOOLS...........................................................................................................................................14
2.7 HEAT EXCHANGER..............................................................................................................................14
2.8 GFS-FS REFERENCE GAS CYLINDER FILL STATION......................................................................14
2.9 MASS FLOW CONTROLLERS .............................................................................................................14
2.10 MOLBLOC MOLSTICS (OPTIONAL)....................................................................................................15
2.11 MASS SET (OPTIONAL) .......................................................................................................................15
3. INSTALLATION ................................................................ 17
3.1 UNPACKING AND INSPECTION ..........................................................................................................17
3.1.1 GRANITE VIBRATION ISOLATION TABLE AND STAND..........................................................................17
3.1.2 GFS DRAFT ENCLOSURE AND SYSTEM ACCESSORIES......................................................................18
3.1.3 LABORATORY CONDITIONS MONITOR...................................................................................................19
3.1.4 MFC-CB .......................................................................................................................................................19
3.1.5 GFS-FS REFERENCE GAS CYLINDER FILL STATION............................................................................19
3.1.6 GFS MASS BALANCE.................................................................................................................................20
3.1.7 AMH-GFS2102.............................................................................................................................................20
3.1.8 REFERENCE GAS CYLINDER ASSEMBLIES...........................................................................................21
3.1.9 SYSTEM CONTROLLER.............................................................................................................................22

GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page II
3.1.10 MS-2102-0.7 MASS SET OR MS-2102-CAR MASS CARRIER..................................................................23
3.1.11 MOLSTICS...................................................................................................................................................23
3.2 SITE REQUIREMENTS..........................................................................................................................23
3.2.1 GFS2102 SYSTEM ......................................................................................................................................23
3.2.2 GFS-FS REFERENCE GAS CYLINDER FILL STATION............................................................................25
3.3 SETUP ...................................................................................................................................................26
3.3.1 POSITION THE VIBRATION ISOLATION TABLE ......................................................................................26
3.3.2 INSTALL DRAFT ENCLOSURE ON VIBRATION ISOLATION TABLE......................................................27
3.3.3 SETUP LCM.................................................................................................................................................28
3.3.4 SETUP MFC-CB ..........................................................................................................................................29
3.3.5 SET UP THE SYSTEM CONTROLLER (PC) ..............................................................................................29
3.3.6 VERIFY GFS CALIBRATION DATA............................................................................................................29
3.3.7 ASSEMBLE REFERENCE GAS CYLINDER(S)..........................................................................................30
3.3.8 ENTER REFERENCE GAS CYLINDER DATA...........................................................................................32
3.3.9 INSTALLATION OF REFERENCE MASS ON MASS PLATE.....................................................................32
3.3.10 INITIAL BALANCE AND AMH BASE SETUP.............................................................................................34
3.3.11 SETUP BALANCE LOCATION....................................................................................................................35
3.3.12 AMH POSITION FINE ADJUSTMENT.........................................................................................................36
3.3.13 SETUP PROBE LOCATIONS......................................................................................................................38
3.3.14 PREPARE THE HEAT EXCHANGER..........................................................................................................39
3.3.15 CONNECT THE DUT FLOW PATH.............................................................................................................40
3.3.16 CONNECT GAS CONVEYANCE LOOP......................................................................................................41
4. OPERATION..................................................................... 43
4.1 GENERAL OPERATING PRINCIPLES .................................................................................................43
4.1.1 GFS2102 MEASUREMENT PRINCIPLE.....................................................................................................43
4.1.2 GAS DEPENDENT MASS RANGES AND CYLINDER SIZE SELECTION ................................................44
4.1.3 AUTOZERO..................................................................................................................................................46
4.1.4 GFS2102 DATA COLLECTION METHODS AND CONVENTIONS............................................................46
4.1.4.1 ACCUMULATIONS ..................................................................................................................................46
4.1.4.2 SAMPLES ................................................................................................................................................46
4.1.4.3 AVERAGES AND BEST FITS..................................................................................................................47
4.1.5 SETTINGS FOR FLOW SAMPLING............................................................................................................47
4.1.5.1 SETTING UP STARTING AND ENDING SAMPLE TOLERANCE...........................................................48
4.2 MANUAL GFS TOOLS OPERATION....................................................................................................48
4.2.1 READING THE BALANCE...........................................................................................................................48
4.2.2 AMH OPERATION.......................................................................................................................................49
4.2.3 BALANCE ZERO AND SPAN ADJUSTMENT ............................................................................................49
4.3 REFERENCE GAS CYLINDER FILLING ..............................................................................................49
4.3.1 TRANSPORTING THE REFERENCE GAS CYLINDER ASSEMBLY.........................................................49
4.3.2 EVACUATING AND RINSING .....................................................................................................................50
4.3.3 CONNECTING TO GFS-FS .........................................................................................................................50
4.3.4 FILLING THE CYLINDER............................................................................................................................51
4.4 CONSIDERATIONS FOR MAKING RELIABLE MEASUREMENTS.....................................................53
4.4.1 COOLING AND CONDENSATION AT HIGH FLOW...................................................................................53
4.4.2 STABILITY OF AMBIENT CONDITIONS ....................................................................................................53
4.4.3 COMPARING REFERENCE AND DUT MEASUREMENTS USING FLOW VS. MASS CALCULATIONS 54
4.4.4 LEAKS .........................................................................................................................................................54
4.4.4.1 LEAK TEST OPTION IN A TEST DEFINITION........................................................................................55
4.4.4.2 SEMI-AUTOMATED LEAK TEST.............................................................................................................55
4.4.4.3 SEMI-AUTOMATED LEAK TEST TO MANUAL ISOLATION POINT ......................................................55
4.4.5 FLOW CONTROL AND STABILITY............................................................................................................56

TABLE OF CONTENTS
Page III © 2007 DH Instruments, a Fluke Company
5. GFS TOOLS SOFTWARE ................................................... 57
5.1 MAIN DISPLAY AND FEATURES.........................................................................................................57
5.1.1 OVERVIEW..................................................................................................................................................57
5.1.2 MAIN MENU BAR........................................................................................................................................57
5.1.2.1 [RUN]........................................................................................................................................................57
5.1.2.2 [SETUP] ...................................................................................................................................................58
5.1.2.3 [TOOLS] ...................................................................................................................................................58
5.1.2.4 [DATA]......................................................................................................................................................58
5.1.2.5 [WINDOW]................................................................................................................................................59
5.1.2.6 [HELP]......................................................................................................................................................59
5.1.3 STATUS BAR...............................................................................................................................................59
5.1.4 MAIN TOOLBAR..........................................................................................................................................60
5.1.4.1 RUN TEST TOOLS ..................................................................................................................................60
5.1.4.2 RUN DISPLAY TOOLS ............................................................................................................................60
5.1.4.3 DATA ACQUISITION TOOLS ..................................................................................................................61
5.1.5 RUN SCREENS ...........................................................................................................................................63
5.1.5.1 OVERVIEW..............................................................................................................................................63
5.1.5.2 GFS RUN SCREEN .................................................................................................................................64
5.1.5.3 GFS DIAGNOSTICS RUN SCREEN........................................................................................................68
5.1.5.4 BALANCE OUTPUT RUN SCREEN........................................................................................................70
5.1.5.5 AMBIENT CONDITIONS RUN SCREEN.................................................................................................71
5.1.5.6 DUT/REFERENCE COMPARISON RUN SCREEN.................................................................................72
5.1.5.7 DEVICE OUTPUT RUN SCREEN............................................................................................................73
5.1.5.8 SPY WINDOWS.......................................................................................................................................74
5.1.5.9 MOLBOX OUTPUT RUN SCREEN..........................................................................................................75
5.1.5.10 TARE MOLBOX........................................................................................................................................77
5.1.5.11 MFC-CB RUN SCREEN...........................................................................................................................78
5.1.5.12 DATA GRID RUN SCREEN.....................................................................................................................79
5.1.5.13 DATA PLOT RUN SCREEN.....................................................................................................................79
5.2 [TOOLS] MENU.....................................................................................................................................80
5.2.1 OVERVIEW..................................................................................................................................................80
5.2.2 [OPTIONS]...................................................................................................................................................80
5.2.2.1 [RUN TEST] TAB......................................................................................................................................80
5.2.2.2 [INITIALIZE TEST] TAB............................................................................................................................83
5.2.2.3 [END TEST] TAB......................................................................................................................................84
5.2.2.4 [DATA FILE] TAB .....................................................................................................................................85
5.2.2.5 [DATA GRID] TAB....................................................................................................................................87
5.2.3 [UNIT OF MEASURE CONVERTER] ..........................................................................................................89
5.2.4 [REMOTE COMMUNICATIONS].................................................................................................................89
5.2.5 [PROCESS GAS EDITOR]..........................................................................................................................90
5.2.6 [CHANGE GFS AMH STATE]......................................................................................................................91
5.2.7 [PC TIMER CALIBRATION] ........................................................................................................................91
5.3 [DATA] MENU........................................................................................................................................91
5.3.1 OVERVIEW..................................................................................................................................................91
5.3.2 [VIEW DATA FILE] ......................................................................................................................................91
5.3.3 [PLOT DATA]...............................................................................................................................................93
5.3.3.1 PLOT TOOLBAR......................................................................................................................................93
5.3.3.2 PLOT OPTIONS MENU ...........................................................................................................................94
5.3.3.3 CREATE/EDIT PLOTS.............................................................................................................................94
5.3.3.4 PLOT POINTS..........................................................................................................................................96
5.3.4 [REPORT DATA] .........................................................................................................................................98
5.4 DATA FILES ..........................................................................................................................................99
5.4.1 OVERVIEW..................................................................................................................................................99
5.4.2 DATA FILE CREATION ...............................................................................................................................99
5.4.3 NAMING AND STORING DATA FILES.......................................................................................................99
5.4.4 DATA FILE STRUCTURE..........................................................................................................................100
5.5 [SETUP] MENU ...................................................................................................................................102
5.5.1 OVERVIEW................................................................................................................................................102
5.5.1.1 SETUP SELECTOR...............................................................................................................................102
5.5.1.2 EDITOR TOOLBAR................................................................................................................................102
5.5.2 [SETUP], [TEST]........................................................................................................................................104
5.5.2.1 CREATING TEST DEFINITIONS...........................................................................................................104
5.5.2.2 EDITING TEST DEFINITIONS...............................................................................................................105
5.5.2.3 TEST POINT SEQUENCE.....................................................................................................................105
5.5.2.4 [PRE-TEST] TAB....................................................................................................................................105
5.5.2.5 [CONTROL]............................................................................................................................................107
5.5.2.6 [DATA]....................................................................................................................................................108
5.5.2.7 [AUTOZERO]..........................................................................................................................................110

GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page IV
5.5.2.8 [OPTIONS] .............................................................................................................................................111
5.5.2.9 [COMMENT]...........................................................................................................................................112
5.5.3 [DUT ].........................................................................................................................................................113
5.5.3.1 [HEADER] TAB ......................................................................................................................................114
5.5.3.2 [CALIBRATION] TAB..............................................................................................................................116
5.5.3.3 [COMMUNICATIONS] TAB....................................................................................................................117
5.5.3.4 REMOTE COMMAND EDITOR..............................................................................................................120
5.5.3.5 [OUTPUT] TAB.......................................................................................................................................125
5.5.3.6 [COMMENT] TAB...................................................................................................................................128
5.5.4 [SUPPORT HARDWARE]..........................................................................................................................129
5.5.5 [REFERENCE GAS CYLINDER]...............................................................................................................129
5.5.6 [CONFIGURATION]...................................................................................................................................131
5.5.6.1 [SYSTEM]...............................................................................................................................................131
5.5.6.2 GFS AMH...............................................................................................................................................133
5.5.6.3 [LIMITS]..................................................................................................................................................134
5.5.6.4 [LCM]......................................................................................................................................................135
5.5.6.5 [BALANCE].............................................................................................................................................136
5.5.6.6 [INTERFACE].........................................................................................................................................137
5.5.7 [CALIBRATION].........................................................................................................................................138
5.5.7.1 [TIME/MASS]..........................................................................................................................................138
5.5.7.2 [AMBIENT] .............................................................................................................................................139
5.5.7.3 [TH PROBE #2]......................................................................................................................................140
5.5.7.4 [TH PROBE #3]......................................................................................................................................141
5.5.7.5 [EXTERNAL PRT] ..................................................................................................................................141
5.5.7.6 [IR PROBE] ............................................................................................................................................142
5.6 [RUN] MODES.....................................................................................................................................142
5.6.1 RUN TEST..................................................................................................................................................143
5.6.2 RUN MANUAL TEST.................................................................................................................................147
5.6.3 RUN DIAGNOSTIC TEST..........................................................................................................................149
5.7 CALCULATIONS .................................................................................................................................149
5.7.1 OVERVIEW................................................................................................................................................149
5.7.2 ERRORS....................................................................................................................................................149
5.7.3 TOLERANCE .............................................................................................................................................150
5.7.4 AUTOZERO CORRECTION ......................................................................................................................150
5.7.5 REFERENCE CYLINDER BUOYANCY.....................................................................................................151
5.7.6 FULLY COMPENSATED MASS................................................................................................................153
5.7.7 AVERAGE FLOW ......................................................................................................................................154
5.7.8 BEST FIT FLOW........................................................................................................................................154
5.7.9 INTEGRATED MASS.................................................................................................................................155
5.7.10 %READING GFS TOLERANCE ................................................................................................................155
5.7.11 SAMPLE RATE..........................................................................................................................................157
6. GENERAL MAINTENANCE, ADJUSTMENTS, AND STORAGE.159
6.1 SUMMARY...........................................................................................................................................159
6.2 AMH-GFS2102 PLATE POSITIONING POSTS LUBRICATION.........................................................159
6.3 REFERENCE GAS CYLINDER ALIGNMENT.....................................................................................160
6.3.1 CHECK REFERENCE GAS CYLINDER ALIGNMENT .............................................................................160
6.3.2 ALIGNMENT OF THE REFERENCE GAS CYLINDER.............................................................................161
6.4 PREPARING THE REFERENCE GAS CYLINDER ASSEMBLY FOR SHIPMENT OR LONG TERM
STORAGE............................................................................................................................................162
6.5 REFERENCE GAS CYLINDER HYDROSTATIC TESTING................................................................163
6.6 REMOVING OR REASSEMBLING THE CYLINDER CARRIER.........................................................163
6.6.1 REMOVING THE CYLINDER CARRIER...................................................................................................164
6.6.2 REASSMBLING THE CARRIER TO THE CYLINDER..............................................................................164
6.7 CHECK/CHANGE FLUID IN HEAT EXCHANGER..............................................................................165
6.8 RELEVEL SYSTEM SURFACES.........................................................................................................165
6.9 LEAK CHECK THE FLOW PATH........................................................................................................165

TABLE OF CONTENTS
Page V © 2007 DH Instruments, a Fluke Company
7. MAINTENANCE OF TRACEABILITY AND RECALIBRATION...167
7.1 PRINCIPLES OF GFS2102 TRACEABILITY MAINTENANCE ...........................................................167
7.2 [PC TIMER CALIBRATION] ................................................................................................................167
7.3 MOLBOX AUTOZ AND TARE OPERATIONS.....................................................................................167
7.4 REFERENCE MASS RECALIBRATION..............................................................................................167
7.5 LABORATORY CONDITIONS MONITOR (LCM) RECALIBRATION .................................................168
7.5.1 OVERVIEW................................................................................................................................................168
7.5.2 AS RECEIVED DATA REVIEW .................................................................................................................169
7.5.3 LCM TIME VERIFICATION OR ADJUSTMENT........................................................................................169
7.5.3.1 PRINCIPLE ............................................................................................................................................169
7.5.3.2 LCM TIME VERIFICATION....................................................................................................................169
7.5.3.3 LCM TIME ADJUSTMENT.....................................................................................................................170
7.5.3.4 EQUIPMENT REQUIRED.................................................................................................................170
7.5.3.5 OPERATION.....................................................................................................................................170
7.5.4 AMBIENT P, T, H SENSOR ADJUSTMENT .............................................................................................171
7.5.4.1 PRINCIPLE ............................................................................................................................................171
7.5.4.2 ENCLOSURE PRESSURE SENSOR....................................................................................................172
7.5.4.3 AMBIENT TEMPERATURE SENSOR...................................................................................................173
7.5.4.4 RELATIVE HUMIDITY SENSOR............................................................................................................174
7.5.5 TH PROBE ADJUSTMENT........................................................................................................................175
7.5.5.1 TH PROBE TEMPERATURE SENSOR.................................................................................................175
7.5.5.2 TH PROBE RELATIVE HUMIDITY SENSOR........................................................................................176
7.5.6 EXTERNAL PRT TEMPERATURE ADJUSTMENT ..................................................................................177
7.5.7 INFRARED (IR) CYLINDER TEMPERATURE ADJUSTMENT.................................................................178
7.5.8 LCM OHMIC MEASUREMENT SYSTEM VERIFICATION........................................................................179
7.5.9 STANDARD RESISTOR MEASUREMENT AND ADJUSTMENT.............................................................181
7.5.10 LCM REMOTE COMMAND FOR AUTOMATION......................................................................................182
7.6 MOLBOX RECALIBRATION...............................................................................................................183
7.7 MFC-CB RECALIBRATION.................................................................................................................183
7.8 BALANCE RECALIBRATION..............................................................................................................183
7.8.1 INTERNAL BALANCE CALIBRATION......................................................................................................183
7.8.2 GFS TOOLS ZERO AND SPAN CALIBRATION.......................................................................................183
7.8.3 VERIFICATION BY MASS CARRIER........................................................................................................184
8. TROUBLESHOOTING .......................................................185
8.1 OVERVIEW..........................................................................................................................................185
9. APPENDIX ......................................................................187
9.1 GLOSSARY .........................................................................................................................................187
9.2 TYPICAL TEST SETUPS.....................................................................................................................188
9.3 WARRANTY STATEMENT..................................................................................................................189

GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page VI
N
NO
OT TE ES S

TABLES & FIGURES
Page VII © 2007 DH Instruments, a Fluke Company
T
TA
AB BL LE ES S
Table 1. GFS2102 packing list...................................................................................................................17
Table 2. Draft enclosure and system accessories list ...............................................................................18
Table 3. LCM parts list................................................................................................................................19
Table 4. MFC-CB parts list..........................................................................................................................19
Table 5. GFS-FS fill station parts list ..........................................................................................................20
Table 6. GFS mass balance parts list........................................................................................................20
Table 7. AMH-GFS2102 parts list...............................................................................................................21
Table 8. Reference gas cylinder assemblies’ parts lists............................................................................22
Table 9. MS-2102-0.7 mass set parts list..................................................................................................23
Table 10. MS-2102-CAR mass carrier parts list........................................................................................23
Table 11: Maximum mass available for flow testing for various GFS2102 supported gases.....................45
Table 12. Main Toolbar, Run Test Tools ...................................................................................................60
Table 13. Main Toolbar, Run Display Tools...............................................................................................61
Table 14. <Control> Toolbar, Data Acquisition Options ............................................................................62
Table 15. GFS Control Panel Fields..........................................................................................................65
Table 16. GFS System Display Fields.......................................................................................................67
Table 17. GFS Control Toolbar icons .........................................................................................................67
Table 18. GFS Diagnostics Fields .............................................................................................................69
Table 19. Balance Output Run Screen Fields ..........................................................................................70
Table 20. GFS Ambient Conditions Run Screen Fields ...........................................................................71
Table 21. DUT/Reference Comparison Run Screen Fields......................................................................73
Table 22. Spy Window Information............................................................................................................75
Table 23. <molbox Output> Run Screen Fields.........................................................................................76
Table 24. Tare molbox Fields ....................................................................................................................78
Table 25. MFC CB Fields...........................................................................................................................79
Table 26. Options, [Run Test] Tab Fields..................................................................................................81
Table 27. Options, [Initialize Test] Tab Fields............................................................................................83
Table 28. Options, [End Test] Tab Fields ..................................................................................................85
Table 29. Options, [Data File] Tab Fields ..................................................................................................86
Table 30. Options, [Data Grid] Tab Selections..........................................................................................89
Table 31. Data File Viewer Options...........................................................................................................92
Table 32. Data Plot Toolbar.......................................................................................................................93
Table 33. Custom Plot Editor Fields ..........................................................................................................95
Table 34. Plot Points General Tab Fields..................................................................................................97
Table 35. Plot Points Best Fit Tab Fields...................................................................................................98
Table 36. Data Files Types........................................................................................................................99
Table 37. Data File Data Field Optional Selections.................................................................................100
Table 38. Data File Structure...................................................................................................................101
Table 39. Editor Toolbar Features...........................................................................................................103
Table 40. Test Editor, [Pre-Test] Tab, <Leak Test> Fields......................................................................106
Table 41. Test Definition Editor, Point Sequence Tab, [General] Child Tab Fields.................................107
Table 42. Test Definition Editor [Data] Tab Fields...................................................................................109
Table 43. Test Definition Editor [AutoZero] Tab Fields............................................................................111
Table 44. Test Definition Editor [Options] Tab Fields..............................................................................112
Table 45. DUT Editor, [Header] Tab Fields .............................................................................................114

GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page VIII
Table 46. Device Editor, [Calibration] Tab Fields ....................................................................................117
Table 47. Device Editor, [Communications] Tab Fields..........................................................................119
Table 48. Remote Command Editor, [Command] Tab Fields..................................................................123
Table 49. Remote Command Editor, [Global Settings] Tab Options.......................................................124
Table 50. DUT Editor, [Output] Tab Fields ..............................................................................................126
Table 51. Tolerance Type Choices..........................................................................................................127
Table 52. Device Type Options................................................................................................................129
Table 53. Reference Cylinder Editor Fields.............................................................................................130
Table 54. GFS Configuration Editor [System] Tab Fields........................................................................132
Table 55. GFS Configuration Editor [GFS AMH] Tab Fields ...................................................................133
Table 56. GFS Configuration Editor [Limits] Tab Fields ..........................................................................134
Table 57. GFS Configuration Editor [LCM] Tab Fields............................................................................135
Table 58. GFS Configuration Editor [Balance] Tab .................................................................................136
Table 59. GFS Configuration Editor [Interface] Tab Fields......................................................................137
Table 60. Calibration Editor [Time/Mass] Tab Fields...............................................................................138
Table 61. Calibration Editor [Ambient] Tab Fields ...................................................................................139
Table 62. Calibration Editor [TH Probe #2] and [TH Probe #3] Tab Fields .............................................140
Table 63. Calibration Editor [External PRT] Tab Fields...........................................................................142
Table 64. Calibration Editor [IR Probe] Tab Fields..................................................................................142
Table 65. Mechanical maintenance procedures......................................................................................159
Table 66. Troubleshooting checklist........................................................................................................185
Table 67. DHI Authorized Service Providers...........................................................................................189

TABLES & FIGURES
Page IX © 2007 DH Instruments, a Fluke Company
F
FI
IG GU UR RE ES S
Figure 1. GFS2102 system..........................................................................................................................5
Figure 2. Reference gas cylinder resting on GFS balance and AMH-GFS2102.........................................6
Figure 3. AMH reference mass plate...........................................................................................................7
Figure 4. Balance mass tray supporting the reference gas cylinder ...........................................................7
Figure 5. Reference gas cylinder assembly...................................................................................................8
Figure 6. 1.5 liter and 1.1 liter reference gas cylinder assemblies ..............................................................9
Figure 7. Reference gas cylinder support..................................................................................................10
Figure 8. Reference gas cylinder connector..............................................................................................10
Figure 9. GFS draft enclosure on vibration isolation table.........................................................................12
Figure 10. Laboratory Conditions Monitor .................................................................................................13
Figure 11. GFS-FS Reference gas cylinder fill station ..............................................................................14
Figure 12. Typical layout of overall GFS2102 system at site of use..........................................................25
Figure 13. Installation of draft enclosure doors..........................................................................................28
Figure 14. LCM rear panel connections.....................................................................................................28
Figure 15. Reference gas cylinder assembly...............................................................................................30
Figure 16. Reference gas cylinder connector............................................................................................31
Figure 17. Regulator assembly position before and after tightening.........................................................32
Figure 18. Reference Mass Legs (Spherical (x 2) and Flat)......................................................................32
Figure 19. Location of balance positioning bracket mounting holes..........................................................34
Figure 20. GFS balance rear panel connections.......................................................................................34
Figure 21. GFS balance inside AMH with mass tray installed..................................................................35
Figure 22. Checking height and level of gas conveyance loop connections using loop alignment tool....36
Figure 23. Reference Gas Cylinder resting on balance. AMH top plate installed; reference
mass plate uninstalled.............................................................................................................37
Figure 24. View of cylinder support legs through AMH top plate. ...........................................................37
Figure 25. Temperature probe positions around reference gas cylinder. .................................................39
Figure 26: Heat Exchanger, Low ................................................................................................................39
Figure 27: Heat Exchanger unassembled ..................................................................................................40
Figure 28: Single, Low flow molstic.............................................................................................................40
Figure 29. GFS-FS reference gas cylinder fill station connections ............................................................50
Figure 30. Reference gas cylinder connector..............................................................................................51
Figure 31. <Status Bar>.............................................................................................................................59
Figure 32. Test Status................................................................................................................................59
Figure 33. Progress Indicator.....................................................................................................................59
Figure 34. Main Toolbar - Display while idle..............................................................................................60
Figure 35. Manual Averaging Options .......................................................................................................62
Figure 36. <Average Setup>......................................................................................................................63
Figure 37. GFS Run Screen ......................................................................................................................64
Figure 38: GFS Control Panel section of GFS Run Screen .......................................................................65
Figure 39: GFS System Display section of GFS Run Screen ....................................................................66
Figure 40. GFS Control Toolbar section of GFS Run Screen ...................................................................67
Figure 41. GFS Diagnostics Run Screen...................................................................................................69
Figure 42. Balance Output Run Screen....................................................................................................70
Figure 43. GFS Ambient Conditions Run Screen.....................................................................................71
Figure 44. DUT/Reference Comparison Run Screen...............................................................................72

GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page X
Figure 45. Device Output Run Screen.......................................................................................................74
Figure 46. Spy Window Screen .................................................................................................................74
Figure 47. <molbox Output> Run Screen..................................................................................................75
Figure 48. molbox Output Run Screen in Tare Mode................................................................................77
Figure 49. MFC-CB Run Screen................................................................................................................78
Figure 50. Data Grid Run Screen ..............................................................................................................79
Figure 51. Data Plot Run Screen...............................................................................................................80
Figure 52. Options, [Run Test] Tab............................................................................................................81
Figure 53. Options, [Initialize Test] Tab.....................................................................................................83
Figure 54. Options, [End Test] Tab............................................................................................................84
Figure 55. Options, [Data File] Tab............................................................................................................86
Figure 56. Options, [Data Grid] Tab...........................................................................................................88
Figure 57. Direct Remote Communication.................................................................................................90
Figure 58. Change GFS AMH State ..........................................................................................................91
Figure 59. Data File Viewer .......................................................................................................................92
Figure 60. [Data], [Plot Data File] Screen..................................................................................................93
Figure 61. Custom Plot Editor....................................................................................................................95
Figure 62. Plot Points display ....................................................................................................................97
Figure 63. Plot Points Best Fit Tab............................................................................................................98
Figure 64. Setup Selector ........................................................................................................................102
Figure 65. Editor Toolbar .........................................................................................................................103
Figure 66. Test Definition Editor, Point Sequence...................................................................................105
Figure 67. Test Definition Editor [Control] Tab ........................................................................................107
Figure 68. Test Definition Editor [Data] Tab ............................................................................................109
Figure 69. Test Definition Editor [AutoZero] Tab.....................................................................................110
Figure 70. Test Definition Editor [Options] Tab........................................................................................111
Figure 71. Test Definition Editor, [Comment] Tab ...................................................................................113
Figure 72. DUT Editor, [Header] Tab.......................................................................................................114
Figure 73. DUT Editor, [Calibration] Tab .................................................................................................116
Figure 74. Date Selection ........................................................................................................................117
Figure 75. DUT Definition Editor [Communications] Tab.........................................................................118
Figure 76. Remote Command Editor.......................................................................................................121
Figure 77. DUT Device Edit [Output] Tab................................................................................................125
Figure 78. %Reading Tolerance..............................................................................................................127
Figure 79. %Span Tolerance ...................................................................................................................127
Figure 80. %Span or %Reading (Greater of)...........................................................................................128
Figure 81. %Span + %Reading ...............................................................................................................128
Figure 82. DUT Device Edit [Comment] Tab ...........................................................................................129
Figure 83. Reference Cylinder Editor ......................................................................................................130
Figure 84. GFS Configuration [System] Tab............................................................................................131
Figure 85. GFS Configuration [GFS AMH] Tab.......................................................................................133
Figure 86. GFS Configuration [Limits] Tab ..............................................................................................134
Figure 87. GFS Configuration [LCM] Tab................................................................................................135
Figure 88: Remote interface settings window...........................................................................................136
Figure 89. GFS Configuration [Balance] Tab...........................................................................................136
Figure 90. GFS Configuration [Interface] Tab..........................................................................................137
Figure 91. Calibration [Time/Mass] Tab...................................................................................................138
Figure 92. Calibration [Ambient] Tab.......................................................................................................139
Figure 93. Calibration [TH Probe #2] Tab................................................................................................140
Figure 94. Calibration [TH Probe #3] Tab................................................................................................141

TABLES & FIGURES
Page XI © 2007 DH Instruments, a Fluke Company
Figure 95. Calibration [External PRT] Tab...............................................................................................141
Figure 96. Calibration [IR Probe] Tab......................................................................................................142
Figure 97: Run Test - Setup Test Definition window ................................................................................143
Figure 98: Run Test - Select Test Definition Window...............................................................................144
Figure 99: Run Test - Select DUTs window..............................................................................................144
Figure 100: Run Test - Configure DUT Device window............................................................................145
Figure 101: Run Test - Setup Flow Controller window.............................................................................145
Figure 102: Run Test - Configure MFC Device window...........................................................................146
Figure 103: Run Test - Initializing Test Instruments window....................................................................146
Figure 104: Run Manual Test - Setup Manual Test window.....................................................................147
Figure 105: Accumulation Sample Setup window ....................................................................................148
Figure 106: US-DOT and European Reference Gas Cylinder labels.......................................................163
Figure 107. Reference gas cylinder carrier..............................................................................................164
Figure 108. Time Calibration window .......................................................................................................170
Figure 109. Calibration Time/Mass tab.....................................................................................................171
Figure 110: LCM default front panel display.............................................................................................172
Figure 111. Ambient sensors adjustment tab...........................................................................................173
Figure 112: LCM TH probe front panel display.........................................................................................175
Figure 113. TH Probe #2 adjustment tab..................................................................................................176
Figure 114. External PRT adjustment tab.................................................................................................178
Figure 115. LCM IR probe front panel display..........................................................................................179
Figure 116. IR Probe adjustment tab........................................................................................................179
Figure 117. View of main board socket J19 or top view of calibration cable...........................................182

GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page XII
N
NO
OT TE ES S

ABOUT THIS MANUAL
Page XIII © 2007 DH Instruments, a Fluke Company
A
AB
BO OU UT T T
TH
HI IS S M
MA
AN NU UA AL L
This manual provides the information necessary to operate a GFS2102 gravimetric mass flow calibration
standard to make gas mass flow measurements. It also provides additional recommendations and
information to help you optimize use of the GFS2102 system and take full advantage of it’s many features
and functions.
Before using the manual, take a moment to familiarize yourself with the Table of Contents structure. Set
up of a GFS2102 system should not be attempted without using Section 3. All first time GFS2102 users
should read Section 4. There is a glossary of common terms in Section 9.1, a troubleshooting guide in
Section 1, and a chart of typical test settings in Section
Manual Conventions
(CAUTION) is used throughout the manual to identify user warnings and cautions.
(NOTE) is used throughout the manual to identify operating and applications advice and
additional explanations.
[ ] indicates direct function keys or objects (e.g., [RANGE]) on an instrument front panel keypad or in a
software user interface.
< > indicates instrument front panel screen displays or labels in a software user interface (e.g., <1yes>)

GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page XIV
N
NO
OT TE ES S

1. INTRODUCTION
Page 1 © 2007 DH Instruments, a Fluke Company
1
1. . I IN
NT TR RO OD DU UC CT TI IO ON N
GFS2102 is a primary gravimetric gas flow measurement standard. It is intended for use in calibrating
gas flow transfer standards or other flow devices requiring a very low uncertainty reference. GFS2102 is
recommended when low uncertainty is the primary requirement of a flow measurement or the ability to
internally maintain traceability of mass flow measurements is desired. GFS2102 covers the range of
10 sccm to 10 slm in most gases.
GFS2102 measures gas mass flow by measuring the loss of mass from a reference gas cylinder over a
measured period of time. The reference gas cylinder assembly rests on the GFS mass balance and flow is
transmitted from the cylinder through a flow path designed to have minimal effect on the balance mass
measurement. Balance mass and time measurements and a number of ambient conditions are all read using
a component of the GFS2102 system called LCM, the Laboratory Conditions Monitor. Since test times may
be long, a special automated mass handling platform is used to load a fixed reference mass on the GFS
balance at intervals thoughout the test to quantify and remove any effects from balance drift over time.
All measurement functions of the GFS2102 system are operated by a system controller (personal
computer) running GFS Tools software. The system is made up of several individual components
working together and controlled by GFS Tools.
1.1 SPECIFICATIONS
1.1.1 GFS2102 GENERAL SPECIFICATIONS
Power Requirements Balance
LCM
MFC-CB
100 to 240 VAC, 50 to 60 Hz, 27 W max. consumption
100 to 240 VAC, 50 to 60 Hz, 40 W max. consumption
85 to 264 VAC, 50 to 60 Hz, 36 W max. consumption
Operating Temperature Range 15 to 25 °C
Humidity Range 5 to 70% RH, non-condensing
Weight Granite table and stand
Rest of system
320 kg (700 lb) approx.
70 kg (150 lb) approx.
Dimensions
Enclusure on Granite Table w/ stand
LCM
MFC-CB
GFS-FS
150 cm H x 90 cm W x 60 cm D (58 in. x 36 in. x 24 in.)
8 cm H x 22.5 cm W x 20 cm D (3.1 in. x 8.9 in. x 7.9 in.)
8 cm H x 22.5 cm W x 20 cm D (3.1 in. x 8.9 in. x 7.9 in.)
20 cm H x 41.4 cm W x 20 cm D (7.9 in. x 16.3 in. x 7.9 in.)
Supported Gases Nitrogen (N2), Air, Argon (Ar), Carbon Monoxide (CO), Helium (He),
Oxygen (O2), Carbon Dioxide (CO2), Carbon Tetrafluoride (CF4),
Ethane (C2H6), Ethylene (C2H4), Fluoroform (CHF3),
Hexafluoroethane (C2F6), Hydrogen (H2), Methane (CH4), Nitrous
Oxide (N2O), Sulfur Hexafluoride (SF6), Xenon (Xe)
Flow Measurement Range He, H2
All other gases
at least:
100 sccm to 10 slm
10 sccm to 10 slm
Pressure Connections
outlet flow path from enclosure 1/8” Swagelok tube fitting or equivalent, with adaptor to
1/4” Swagelok tube fitting or equivalent
Reference Gas Cylinder Pressure Limit 20 MPa (3000 psi)
CE Conformance Available, must be specified.

GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 2
1.1.2 GFS2102 MASS BALANCE SPECIFICATIONS
Operating temperature range 15 to 30 °C
Operating humidity (maximum) 70% RH, non-condensing
Resolution 0.1 mg
Mass Uncertainty 10 ppm of span or better
1.1.3 LCM AMBIENT CONDITIONS MEASUREMENT
SPECIFICATIONS
1.1.3.1 PRT BALANCE AMBIENT TEMPERATURE MEASUREMENT
Temperature:
Range
Uncertainty
[°C]
15 to 30
±0.1
1.1.3.2 TH PROBE REFERENCE GAS CYLINDER SURROUNDINGS
AMBIENT CONDITION MEASUREMENT
Temperature:
Range
Uncertainty
[°C]
15 to 30
±0.2
Relative Humidity:
Range
Uncertainty
5 to 95 %RH
±10 %RH
1.1.3.3 INFRARED PROBE REFERENCE GAS CYLINDER SURFACE
TEMPERATURE MEASUREMENT
Temperature:
Range
Uncertainty
[°C]
0 to 30
±2.2
1.1.3.4 AMBIENT CONDITIONS MEASUREMENT
Pressure:
Range
Uncertainty
[kPa]
70 to 110
±0.2
Temperature:
Range
Uncertainty
[°C]
15 to 30
±1.0
Relative Humidity:
Range
Accuracy
5 to 95 %RH
±10 %RH
1.1.3.5 BALANCE READING TIME MEASUREMENT
Time: 32 ppm

1. INTRODUCTION
Page 3 © 2007 DH Instruments, a Fluke Company
1.1.4 MFC-CB SPECIFICATIONS
ANALOG OUTPUT
Voltage Range 0 to 6.000 VDC
Voltage Accuracy ± 0.015 % FS
Voltage Resolution 0.1 mVDC
Current Range 4 to 20 mA
Current Accuracy ± 0.025 % FS
Current Resolution 0.4 μA
ANALOG INPUT
Voltage Range 0 to 6.000 VDC
Min/Max Measurable Voltage - 0.25/6.00 VDC
Voltage Accuracy ±0.015 % FS
Voltage Resolution 1 mVDC
Current Range 4 to 20 mA
1.1.5 FLOW MEASUREMENT SPECIFICATIONS
Repeatability less than ±0.05% of reading
Measurement Uncertainty less than ±0.1% of reading

GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 4
N
NO
OT TE ES S