Agilent Technologies 6890 Series

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Part 1. Electronic Pneumatic Control (EPC) Flow and Pressure Control

Detectors

Figure 8 Internal/external plumbing: TCD with EPC

For more detail, see the Detectors volume.

EXTERNAL

pressure

regulator

Reference and

makeup in

Proportional

valves

Pressure

sensors Restrictors

Reference

switching

valve

TCD

Makeup flow

6890 GC

Control

Main Page

Default Chapter3
- Table of Contents3
Chapter 1. The 6890 Series Gas Chromatograph13
- Manuals14
- Control Tables15
- Using Control Tables16
- Some Specifics18
- Strategy20
- Maintenance Information21
  - Fuses and Batteries21
  - Maintenance Schedule22
- General Warnings23
- Shutting down the GC25
  - For Less than One Week25
  - For more than One Week25
Chapter 2. The Keyboard and Display the Display30
- The Status Board32
- The Keyboard33
- Instant Action Keys [Start], [Stop], and [Prep Run]34
- Function Keys35
- Short-Cut Keys [Temp], [Pres], [Flow], [Det Control], [Ramp #]36
- [Info]39
- [Status]40
- Miscellaneous Keys42
- Modifier Keys48
- Storage and Automation51
- Default Parameters52
  - Procedure: Loading the Default Parameters52
Chapter 3. Flow and Pressure Control Hydrogen Shutdown55
- Column Shutdown55
- Turning Gas Flows on and off56
  - EPC-Controlled Streams56
  - Nonepc-Controlled Streams56
Part 1. Electronic Pneumatic Control (EPC)57
- Interpreting Flow and Pressure Readings57
- Configuration58
- Columns and Inlets59
- Configure the Column60
  - Procedure: Configuring a Capillary Column61
  - Additional Notes on Column Configuration62
- Configure the Carrier Gas63
  - Procedure: Configuring the Carrier Gas63
- Select a Column Mode64
- Enter the Initial Flow or Pressure or Average Linear Velocity66
  - Procedure: Setting Initial Flow or Pressure or Average Linear Velocity68
- Enter a Flow or Pressure Program (Optional)69
  - Procedure: Programming Column Pressure or Flow69
- Enter the Rest of the Inlet Parameters71
  - Procedure: Setting the Rest of the Inlet Parameters72
- Detectors74
  - Gas Configuration77
  - Makeup Gas77
- Auxiliary Channels78
  - Procedure: Changing an Auxiliary Channel Frit81
- Maintaining EPC Calibration82
Part 2. Nonepc Control84
- Inlets84
  - Septum Purge84
- Detectors85
Part 3. Measuring Flow Rates88
- Measuring Flow Rates with a Bubble Meter88
- Where to Measure Flows89
  - Adapters for Measuring Flow Rates89
  - Procedure: Measuring Gas Flows with a Bubble Meter90
- Interpreting Flow Meter Measurements91
Part 4. Flow and Pressure Problems92
- A Gas Does Not Reach the Setpoint Pressure or Flow92
- A Gas Exceeds the Setpoint Pressure or Flow93
- The Inlet Pressure or Flow Fluctuates93
- The Measured Flow Is Not Equal to the Displayed Flow94
Chapter 4. The Column Oven95
- Oven Capabilities96
- Oven Safety97
- Configuring the Oven98
- Procedure: Setting up an Isothermal Run99
- Making a Temperature-Programmed Run100
  - Oven Temperature Programming Setpoints101
  - Oven Ramp Rates102
- Procedure: Setting up a Single-Ramp Program103
- Procedure: Setting up a Multiple-Ramp Program104
- Fast Chromatography105
  - Fast-Heating Oven105
  - Configuring the Oven105
- Using the Oven Insert for Fast Chromatography106
  - To Install the Oven Insert106
  - Removing the Insert108
- Cryogenic Operation109
  - Cryogenic Control Setpoints109
Chapter 5. Columns and Traps111
Part 1. Capillary Columns112
- Column Hanger112
- Procedure: Preparing Capillary Columns113
- Procedure: Installing Capillary Columns in the Split/Splitless Inlet115
- Procedure: Installing Capillary Columns in the Cool On-Column Inlet117
- Procedure: Installing Capillary Columns in the Purged Packed Inlet118
- Procedure: Installing Capillary Columns in the PTV Inlet and Volatiles Interface121
- Procedure: Installing Capillary Columns in NPD and FID Detectors121
- Procedure: Installing Capillary Columns in the TCD125
- Procedure: Installing Capillary Columns in the ECD and Μ-ECD126
- Procedure: Installing Capillary Columns in the FPD130
- Ferrules for Capillary Columns133
  - Graphite and Graphitized-Vespel Ferrules133
  - Vespel Ferrules133
Part 2. Packed Metal Columns134
- Overview: Installing Packed Metal Columns134
- Fittings135
- Preparing Packed Metal Columns136
- Procedure: Making a Spacer from Teflon Tubing137
- Procedure: Installing Ferrules on a Metal Column139
- Procedure: Installing an Adapter in a Detector Fitting140
- Procedure: Installing Packed Metal Columns141
- Ferrules for Packed Metal Columns142
Part 3. Packed Glass Columns143
- Overview: Installing Glass Packed Columns143
- Procedure: Installing Glass Packed Columns145
- Ferrules and O-Rings for Glass Packed Columns147
Part 4. Conditioning Columns148
- Procedure: Preliminary Column Conditioning Steps149
- Procedure: Conditioning a Capillary Column150
- Procedure: Conditioning Packed Columns151
Part 5. Conditioning Chemical Traps152
Part 6. Calibrating Your Capillary Column (Optional)153
- Calibration Modes153
- Column Calibration Procedures154
Chapter 6. Signal Handling161
- Using the Signal Control Tables162
  - Signal Type162
  - Value162
- Analog Output Settings-Zero, Range, and Attenuation166
- Digital Data Handling169
- Column Compensation172
- Test Plot176
Chapter 7. Instrument Automation179
- Executing Events During the Run180
- Run Time Programming180
- Using Run Time Events181
  - Procedure: Programming Run Time Events182
- The Run Table183
- Clock Time Programming185
- Using Clock Time Events186
Chapter 8. Analytical Methods191
- What Is a Method192
- What Can You Do with It192
- Creating a Method193
- Method Mismatch197
  - User-Entered Configuration Changes197
  - Hardware Configuration Changes197
- Procedure: Modifying a Previously Stored Method198
- Procedure: Deleting a Stored Method199
- Method Listings199
Chapter 9. Valve Control201
- The Valve Box202
- Valve Control204
  - The Valve Drivers204
- The Internal Valve Drivers204
- The External Valve Drivers205
- Valve Configurations206
  - Procedure: Configuring a Valve207
- Valve Control208
  - Procedure: Controlling Valves from the Keyboard208
  - From the Run or Clock Time Tables208
- Valve Control Examples209
Chapter 10. The Automatic Liquid Sampler213
Part 1. the 7673 als214
- Injector Control Table216
  - Procedure: Editing Injector Setpoints217
- Configuring the Injector217
  - Procedure: Configuring the Injector218
- Sample Tray Setpoints218
  - Procedure: Editing the Sample Tray Setpoints218
  - Procedure: Configuring the Bar Code Reader219
- Storing Injector Setpoints220
Part 2. the 7683 als221
- Injector Control Table223
  - Procedure: Editing Injector Setpoints224
- Configuring the Injector225
  - Procedure: Configuring the Injector226
- Sample Tray Setpoints226
  - Procedure: Editing the Sample Tray Setpoints226
  - Procedure: Configuring the Bar Code Reader227
- Storing Injector Setpoints227
Chapter 11. Analytical Sequences229
- What Is a Sequence230
- What Can You Do with It230
- Defining a Sequence232
- Procedure: Creating a Sequence234
- Procedure: Storing a Sequence237
- Procedure: Loading a Previously Stored Sequence238
- Procedure: Modifying a Previously Stored Sequence239
- Procedure: Deleting a Sequence240
- Sequence Control240
- Special Considerations When Using an Integrator244
Chapter 12. Messages245
- Not Ready246
- Method Mismatches246
- Warning247
- Shutdown247
- Faults247
- Bad Mainboard and Fatal Error Messages247
Part 1. Not Ready Messages249
- Temperature Zone Not Ready252
- Pressure And/Or Flow Not Ready253
- Detector Not Ready253
- Valve Not Ready255
- Other Not Ready Messages256
Part 2. Shutdown Messages258
Part 3. Warning Messages264
Part 4. Fault Messages268

Agilent Technologies 6890 Series - Page 75

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