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Agilent Technologies
Laboratory Equipment
6890 Series
Service Manual
Page 582
Agilent Technologies 6890 Series - Page 582
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Table of Contents
Main Page
Default Chapter
4
Table of Contents
4
Before Servicing the Instrument
28
Safety
30
Cautions
30
Columns
30
Printed Circuit Boards
30
TCD Detector
30
Voltage Carrying Components
30
Warnings
31
Heated Components
31
Voltage Carrying Components
31
Gases
32
Insulation
32
Tools Required Tools Required
35
Specialized
35
Calibration Notes Calibrating the 6890 GC
37
Factory Calibrations
37
Inlets
38
Split/Splitless Inlet
40
Theory of Operation
40
EPC Inlet
41
Split Mode Operation
41
Pulsed Split Mode
41
Splitless Mode
42
Pulsed Splitless Mode
43
Gas Saver Mode
43
Manually Controlled Inlet
44
Split Mode
44
Splitless Mode
45
Replacement Procedures
47
Removing the Inlet
47
Top Insert Assembly Replacement
48
Heater/Sensor Assembly Replacement
50
Reinstalling the Inlet
50
Replacing the Split Vent Trap
52
Replacing the Split Vent Trap Filter Cartridge
54
Replacing the Inlet EPC Flow Manifold
56
Replacing the Supply Fitting on a Type 1 Flow Manifold
57
Leak Testing-EPC and Manual Inlets
58
Preparation
58
Performing the Leak Test-EPC Inlets
60
Performing the Leak Test-Manual Inlets
63
Leak Testing the EPC Module Only
65
Forward Pressure Valve Leaks
66
Locating Leaks on the Flow Manifold
66
Correcting Leaks
68
Potential Leak Points
69
Purged/Packed Inlet Theory of Operation
71
Manually Controlled Inlet
72
Replacement Procedures
73
Replacing the Inlet
73
Replacing an EPC Flow Manifold
77
Replacing the Supply Fitting on a Type 1 EPC Manifold
78
Leak Testing-EPC and Manual Inlets
79
Preparation
79
Performing the Leak Test-EPC Inlets
81
Performing the Leak Test-Manual Inlets
83
Leak Testing the EPC Module Only
84
Forward Pressure Valve Leaks
85
Locating Leaks on the Flow Manifold
85
Correcting Leaks
87
Potential Leak Points
88
Cool On-Column Inlet Theory of Operation
91
EPC Inlet
91
Manually Controlled Inlet
92
Replacement Procedures
93
Replacing the Inlet
93
Replacing the Heater/Sensor Assembly
96
Replacing the Inlet EPC Flow Manifold
97
Replacing the Supply Fitting on a Type 1 EPC Flow Manifold
98
Leak Testing EPC and Manual Inlets
99
Preparation
99
Performing the Leak Test-EPC Inlets
101
Performing the Leak Test-Manual Inlets
103
Forward Pressure Valve Leaks
104
Leak Testing the EPC Module Only
104
Locating Leaks
105
Correcting Leaks
107
Potential Leak Points
108
Programmed Temperature Vaporization Inlet (PTV) Theory of Operation
111
Sampling Heads
111
Split Modes
112
Septum Head Installed
112
Septumless Head Installed
113
Pulsed Split Modes
114
Splitless Modes
115
Pulsed Splitless Mode
117
Solvent Vent Mode
118
Stage 1: Sample and Vent
118
Stage 2: Sample Transfer
120
Stage 3: Purge and Cleanup
121
Replacement Procedures
122
Replacing the PTV Inlet, Pneumatics, and Manifold
122
Replacing the PTV with Cooling Assembly
125
Replacing the CO 2 or LN 2 Inlet Cryo Assembly
127
Replacing the PTV Manifold Assembly
128
Removing both the Manifold and Plumbing Assemblies
131
Replacing the Plumbing Assemblies
132
Replacing a Gang Fitting Restrictor or O-Ring
134
Replacing the PTV Thermocouple PCB
134
Replacing the Filter
135
Replacing the Inlet Adapter
136
Installing the Column
137
Removing the Septumless Head
138
Cleaning the Septumless Head
139
Replacing the Teflon Ferrule
141
Removing/Replacing the Septum Head
142
Replacing the Liner
144
Replacing the Septum
144
Diagnostics
147
Shutdown Behavior
147
Leak Testing
148
Preparation
148
Performing the Leak Test
149
Leak Testing the PTV Module Only
151
Forward Pressure Valve Leaks
152
Locating Leaks on the Flow Manifold
152
Correcting Leaks
154
Potential Leak Points
154
Volatiles Interface Theory of Operation
157
Splitless Mode
157
Direct Mode
159
Gas Saver
162
Replacement Procedures
163
Replacing or Cleaning the Interface
163
Replacing the Heater/Sensor Assembly
166
Replacing the EPC Manifold
169
Calibrating Your Interface
173
Replacing the Filter
174
Replacing or Cleaning Restrictors
175
Replacing the Gang Fitting
176
Leak Testing the Volatiles Interface
177
Leak Checking
177
Preparing the Interface for a Leak Test
180
Leak Testing the EPC Module Only
181
Forward Pressure Valve Leaks
182
Locating Leaks on the Flow Manifold
182
Correcting Leaks
184
Potential Leak Areas
185
Solvent Vapor Exit Accessory
186
Theory of Operation
186
Replacement Procedures
187
Replacing the Valve/Fitting Assembly
187
Replacing the Bleed Restrictor Column
189
Replacing the Tri-Column Assembly
190
Replacing the Pre-Column Assembly
191
Leak Testing
192
Leak Testing the Tri-Column Assembly
192
Potential Leak Points
192
Leak Testing the SVE Assembly
194
Pneumatics Control Module
196
Theory of Operation
196
Replacement Procedures
197
Replacing the PCM
197
Replacing the PCM Gang Weldment
199
Calibrating the PCM Interface
200
Leak Testing the PCM
202
Forward Pressure Valve Leaks
203
Locating Leaks on the Flow Manifold
203
Correcting Leaks
205
Potential Leak Areas
205
Detectors
206
Flame Ionization Detector (FID) Theory of Operation
209
Manually Controlled Detector
209
Replacement Procedures
211
Replacing the Entire Detector
211
Replacing the Detector Weldment
215
Replacing the Collector Assembly
216
Replacing the FID Jet
218
Removing the Electrometer
220
Removing a Flow Manifold
221
Installing a Manifold
223
Removing the FID Interface Board
227
Diagnostics
229
FID Ignition Problems
229
Cleaning an FID Jet and Collector
230
Cleaning the Collector
230
Cleaning the Jet
230
Nitrogen Phosphorus Detector (NPD) Theory of Operation
233
EPC Detector
233
Manually Controlled Detector
234
Recommended Settings
235
Bead Voltage
235
Equilibration Time
235
Extending the Life of the Bead
235
Turning Hydrogen off between Runs
235
Turning Hydrogen off During a Solvent Peak
235
Jets and Collectors
236
Temperature Programming
236
Correcting NPD Hardware Problems
238
Replacement Procedures
241
Replacing the Entire Detector
241
Software
241
Replacing the Active Element (Bead)
244
Removing the Collector Assembly
247
Replacing the Jet
249
Removing the Electrometer
250
Removing an EPC Flow Manifold
251
Installing a Type 2 Manifold
253
Replacing the Detector Interface Board
259
Cleaning the NPD Jet and Collector
261
Cleaning the Collector
261
Cleaning the Jet
262
Thermal Conductivity Detector (TCD) Theory of Operation
265
Delta PRT
266
Error Messages
267
EPC Detector
268
Manually Controlled Detector
268
Replacement Procedures
270
Replacing the Entire Detector
270
Replacing the Detector Cell
273
Removing an EPC Flow Manifold
276
Installing a Type 2 Manifold
278
Replacing the Detector Interface Card
284
Cleaning the Thermal Conductivity Detector
286
Electron Capture Detector (ECD) Theory of Operation
289
EPC Detector
289
Manually Controlled Detector
289
Replacement Procedures
291
Replacing the Entire Detector/Detector Cell
291
Replacing the Heater/Sensor Assembly
295
Replacing the Makeup Gas Adapter
297
Removing the EPC Flow Manifold
298
Removing the Signal Board
301
Replacing the Detector Interface Card
303
Diagnostics
304
Frequency Test
304
Leak Test
305
Troubleshooting Contamination Problems
307
Ensure Clean Gas Supplies
307
Isolate Problem to Carrier or Makeup Gas Supplies
307
Evaluate the Makeup Side
308
Evaluate the Carrier Side
309
Maintaining an ECD Detector
310
ECD Bakeout
310
Performing a Radioactivity Leak Test (Wipe Test)
311
Micro-Cell Electron Capture Detector (Μ-ECD) Theory of Operation
313
EPC Detector
313
Replacement Procedures
314
Replacing the Entire Detector/Detector Cell
314
Replacing the Heater/Sensor Assembly
317
Replacing the Makeup Gas Adapter
320
Removing an EPC Flow Manifold
322
Installing a Type 2 Manifold
324
Removing the Signal Board
329
Replacing the Detector Interface Card
331
Diagnostics
333
Frequency Test
333
Leak Test
334
Maintaining a Μ-ECD Detector
336
Μ-ECD Bakeout (Thermal Cleaning)
336
Performing a Radioactivity Leak Test (Wipe Test)
337
Flame Photometric Detector (FPD) Theory of Operation
339
Single Wavelength FPD
339
Dual Wavelength FPD
340
Operating Conditions
340
Replacement Procedures
341
Replacing the Entire Detector
341
Column Installation
343
Cleaning/Replacing Windows, Filters, and Seals
345
Cleaning/Replacing the Jet
349
Replacing the Transfer Line Fused Silica Liner
352
Replacing the Photomultiplier Tube
355
Replacing the Heater/Sensor Assemblies
357
Replacing the Ignitor Glow Plug
359
Removing an FPD Flow Manifold
361
Installing a Type 2 Manifold
362
Diagnostics
369
Detector Temperature Considerations
369
PMT Saturation
369
Quenching Effects
369
Flame Ignition Problems
370
Leak Testing
372
Potential Leaks Areas
372
Auxiliary EPC Theory of Operation
375
Replacement Procedures
377
Removing the Auxiliary Manifold (Type 1 or Type 2)
377
Installing a Type 2 Manifold
379
Changing an Auxiliary Channel Frit
387
Mainframe
390
Covers and Fans
392
Plastic Covers
392
Metal Covers
393
Removing the Electronics Cover
394
Removing the Detector Cover
395
Replacing the Detector Top Cover
397
Removing the Pneumatics Top Cover
399
Removing the Pneumatics RFI Shielding
399
Removing the Left Side Cover
400
Removing the Right Side Cover
401
Removing the als Tray Bracket
402
Removing the Inlet Carrier Cover
403
Removing the Inlet Carrier
404
Removing the Rear Covers
405
Removing the Top Rear Cover
405
Removing the Bottom Rear Cover
406
Removing the Injection Port Fan Cover
407
Removing the Injection Port Fan
407
Removing the Keyboard
408
Removing the Pneumatics Area Fan
409
Chassis Mounted Fan
409
Bracket Mounted Fan
410
Oven and Temperature Control Heated Zones
413
Configuring the GC for an MSD
413
Oven Temperature Troubleshooting
414
Testing Resistance of the Heater Coil
415
Cryo Valve Installation/Replacement
416
Installing a New Cryo Valve
416
Replacing an Existing Cryo Valve
418
Replacing the Oven Shroud Assembly
421
Replacing the Oven Sensor
424
Replacing the Oven Fan
425
Replacing the Oven Fan Motor
426
Replacing the Oven Flap Motor
428
Converting the Oven Type
430
Configuring the Oven
430
Power/Electronics Replacement Replacing the Main Board
435
Installing an MIO Card (6890A and 6890 Plus)
438
Replacing Roms on the Main Board (6890A and 6890 Plus)
442
Removing a ROM
442
Inserting a ROM
443
Replacing the Battery
444
Replacing the Pneumatics Board
445
Replacing the PCB Bracket
446
Replacing the Transformer-GC Serial Number < 10225
448
Replacing the als Interface Board
454
Site Preparation
458
Environmental
460
Temperature and Humidity Ranges
460
Ventilation Requirements
460
Venting Oven Exhaust
460
Venting Toxic or Noxious Gases
461
Benchtop Space Requirements
461
Gases Gas Requirements
467
Gases for Capillary Columns
467
Gas Purity
469
The Gas Plumbing
470
Supply Tubing for Carrier and Detector Gases
471
Pressure Regulator-Gas Supply Tubing Connections
472
Two-Stage Pressure Regulators
472
Traps
473
Cryogenic Cooling Requirements
474
Choosing a Coolant
474
Using Carbon Dioxide
475
Using Liquid Nitrogen
477
Supplying Valve Actuator Air
478
Power
480
Grounding
480
Line Voltage
481
USA Fast Heating Oven
481
Canadian Installation
482
Instrument Specifications
486
Physical Specifications
486
Data Communications
486
Dimensions and Average Weight
486
Heated Zones
486
Laboratory Environmental Conditions
486
Safety Certifications
486
Column Oven
487
Inlets
488
Detectors
489
Fid
489
Npd
489
Aed
490
Ecd
490
Fpd
490
Msd
490
Tcd
490
Μ-ECD
490
Performance Verification
492
Checkout Chromatograms FID Checkout Conditions and Chromatogram
495
Typical Values
498
NPD Checkout Conditions and Chromatogram
499
Typical Values
502
TCD Checkout Conditions and Chromatogram
503
Typical Values
506
ECD Checkout Conditions and Chromatogram
507
Typical Values
510
Microcell ECD Checkout Conditions and Chromatogram
511
Typical Values
514
FPD Checkout Conditions and Chromatogram
515
Typical Values
518
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