Varian 4000 GC Manuals

Manuals and User Guides for Varian 4000 GC. We have 1 Varian 4000 GC manual available for free PDF download: Hardware Operation Manual

Varian 4000 GC Hardware Operation Manual (161 pages)

Brand: Varian | Category: Laboratory Equipment | Size: 5 MB

Table of Contents
35
Introduction
39
Functional Description
41
Overview
41
Transfer Line
43
Analyzer
44
Internal Ionization Configuration
44
External Ionization Configuration
46
Hybrid Configuration
48
Ion Trap
48
Detector
50
Vacuum System
51
Vacuum Manifold
51
Foreline Pump
51
Turbomolecular Vacuum Pump
52
Ion Gauge
52
Thermocouple Gauge
53
Pneumatics
53
Helium Flow
54
Calibration Gas Flow
54
The CI Reagent Gas Flow
54
Electronics
55
Controller
56
Power Board
57
Manifold Electronics
58
RF Generator Assembly
58
Ion Detection Board
59
Ion Amplifier
59
Electronic Flow Control
59
Power Input Subsystem and Turbomolecular Pump Controller
59
Main Power Circuit
60
Periodic Maintenance
61
Procedure Interval
61
Checking Foreline Pump Oil Level and Oil Condition
61
Changing Foreline Pump Oil
61
Flushing the Pump Oil
64
Changing the Oil Mist Cartridge
65
Checking Cooling Fans
66
MS Maintenance Procedures
67
General Recommendations
67
Recommended Tools and Materials
67
Common Procedures
68
Turning off the Mass Spectrometer
68
Turning off the Mass Spectrometer with Nitrogen Purge
70
Moving the Mass Spectrometer Away from the GC
71
Removing the Analyzer Assembly
71
Removing the Source/Ion Trap Assembly
74
Reinstalling the Source/Ion Trap Assembly
75
Reinstalling the Analyzer Assembly
78
Turning on the Mass Spectrometer
80
Checking the Vacuum Status
82
Baking out the Mass Spectrometer
83
Checking Ion Trap Operation
83
Cleaning Procedures
84
Cleaning the External Source
84
Cleaning the Internal Ionization Assembly
94
Cleaning Ion Trap Components
98
Replacing a GC Column
105
Removing the Capillary Column from the System
105
Installing a New Capillary Column in the System
106
Replacing Consumable Components
109
Replacing External Source Filaments
109
Conditioning the Filaments
111
Replacing Internal Source Filaments
111
Replacing the Electron Multiplier
113
Replacing the Damping Gas Getter
115
Replacing the Turbomolecular Pump
115
Filling the Calibration Compound Vial
116
Changing Operational Configuration
117
Changing from Internal to External Configuration
118
Changing from External to Internal Configuration
118
Changing from Internal to Hybrid Configuration
118
Changing from External to Hybrid Configuration
118
Changing from Hybrid Mode to External Configuration
118
Changing from Hybrid Mode to Internal Configuration
118
Switching between External and Internal Sources
118
Changing the Transfer Line Position from External to Internal
119
Changing the Transfer Line Position from Internal to External
121
Installing or Removing the Hybrid Plug
123
Chemical Ionization Options
125
Introduction
125
Internal Configuration CI
125
External Configuration CI
125
Hybrid Configuration CI
126
Installing CI Reagent Gas
126
CI Reagent Gas Requirements
127
Setting up the CI Reagent Gas Supply
127
Checking the Reagent Gas Plumbing for Leaks
130
Setting Flows of CI Reagents in Internal Configuration
131
Internal Mode Default Parameters for CI Reagents
131
External Mode Default Parameters for CI Reagents
131
Ion Intensities for Standard CI Reagents
132
Setting Flows of CI Reagents in External Configuration
132
Setting Flows of CI Reagents in Hybrid Configuration
132
The Liquid CI Inlet Option
133
Filling/Refilling Reservoir Bulb
133
Switching from Liquid to Gaseous CI Reagent Operation
134
Troubleshooting
135
How to Isolate a GC/MS Problem
135
Checking the Data System
135
Checking the GC
135
Checking the Mass Spectrometer
135
Troubleshooting Problems with Spectra
136
No Spectrum Appears
136
Loss of High Mass Peaks
137
Part of the Spectrum Is Missing
137
Poor Resolution with Acceptable Air and Water Levels
138
Troubleshooting High Baseline at High Masses
138
Checking for Leaks
139
Establishing Conditions Required for Leak Checks
139
Fixing a Large Air Leak
140
Fixing a Small-To-Moderate Air Leak
141
Checking GC Connections
141
Troubleshooting Air Leaks Using Leak Detection Gas
141
Fixing High Water Levels
142
GC Troubleshooting
143
Using the COLTEST Sample for Troubleshooting
143
Running the COLTEST Sample
143
Troubleshooting Common Chromatographic Problems
144
Correcting Solvent Tailing or Broadening Problems
144
Correcting Tailing Sample Peaks for Particularly Active Components
145
Correcting Low Response and Severe Tailing with High Boiling Point Compounds
145
Correcting Leading Sample Peaks (Reverse Tailing)
145
Correcting Poor Resolution
145
Lack of Peak Size Reproducibility
146
Correcting Peak Splitting (Particularly for Low Boilers)
146
Correcting Extra, Unexpected Peaks in the Chromatogram
146
Correcting Retention Time Differences between Runs
147
Miscellaneous Procedures and Instructions
149
Other Documents
149
Site Requirements
149
Site Preparation
149
Power
149
Quality of Power
152
Operating Environment
152
Temperature
152
Humidity
153
Exhaust System
153
Gas Requirements
153
Helium - GC Carrier Gas
153
Methane, Isobutane, Ammonia - CI Reagent Gases (with CI Option Only)
154
Cryogenics
154
How to Install the 4000 MS
154
How to Move the 4000 MS
155
Parts and Supplies
156
Electronics
156
Pneumatics
156
Analyzer, Attached to Top Flange
156
Analyzer, Attached to Manifold
158
Chemical Ionization
158
Vacuum
158
O-Rings
159
Miscellaneous/Other
159
Test Samples
160
Varian Service
161

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Varian 4000 GC Hardware Operation Manual (161 pages)

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