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Agilent Technologies 7820A Advanced User's Guide
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Agilent T
echnologies
Agilent 7820A
Gas Chromatograph
Advanced User Guide
2
Table of Contents
Default Chapter
3
Table of Contents
3
1 Software Keypad
9
Using the Software Keypad
10
2 Programming
12
Run Time Programming
12
Using Run Time Events
12
Programming Run Time Events
13
The Run Table
13
Adding Events to the Run Table
13
Editing Events in the Run Table
14
Deleting Run Time Events
14
Clock Time Programming
15
Using Clock Time Events
15
Programming Clock Time Events
15
Adding Events to the Clock Table
15
Editing Clock Time Events
16
Deleting Clock Time Events
16
Post Run Programming
17
To Enable a Post Run Program
17
To Disable a Post Run Program
17
3 Inlets
19
Using Hydrogen
20
Inlet Overview
21
Carrier Gas Flow Rates
22
About Gas Saver
23
To Use Gas Saver
24
Pre Run and Prep Run
25
The [Prep Run] Key
25
Auto Prep Run
26
About the Split/Splitless Inlet
27
Septum Tightening (S/SL)
27
Standard S/SL Inlet
28
Split/Splitless Inlet Split Mode Overview
28
Split/Splitless Inlet Splitless Mode Overview
29
The S/SL Inlet Pulsed Split and Splitless Modes
30
Split/Splitless Inlet Split Mode Minimum Operating Pressures
31
Selecting the Correct S/SL Inlet Liner
32
Vapor Volume Calculator
34
Setting Parameters for the S/SL Split Mode
34
Selecting Parameters for the S/SL Splitless Mode
36
Setting Parameters for the S/SL Splitless Mode
36
Setting Parameters for the S/SL Pulsed Modes
38
About the Purged Packed Column Inlet
39
Setting Parameters
40
About the Packed Column Inlet
41
Adjusting Parameters
42
About the Cool On-Column Inlet
43
Setup Modes of the COC Inlet
44
Retention Gaps
44
COC Inlet Temperature Control
44
Setting COC Inlet Flows/Pressures
45
Setting COC Inlet Parameters
46
4 Columns and Oven
47
About the Oven
48
Oven Safety
48
Configuring the Oven
49
About Oven Temperature Programming
50
Programming Setpoints
50
Oven Ramp Rates
51
Setting the Oven Parameters for Constant Temperature
51
Setting the Oven Parameters for Ramped Temperature
52
About Columns
53
Selecting the Correct Packed Glass Column Type
53
About the Column Modes
53
Select a Column Mode
54
Setting the Column Parameters for Constant Flow or Constant Pressure
55
Enter a Flow or Pressure Program (Optional)
55
Programming Column Pressure or Flow
56
Advantages of the Optional Backflush Wizard
56
Procedures for Manually Creating a Backflush Method
57
Nickel Catalyst Tube
61
About the Nickel Catalyst Tube
61
Nickel Catalyst Gas Flows
61
Setting Temperatures for the Nickel Catalyst Tube
62
Hydrogen Sensor
63
Instrument Logs
63
Calibration
63
Status Information
63
Operation with an Agilent Data System
64
About Makeup Gas
66
About the FID
67
How FID Units Are Displayed in Agilent Data Systems and on the GC
68
To Light the FID Flame
68
To Extinguish the FID Flame
68
FID Automatic Reignition (Lit Offset)
68
Recommended Starting Conditions for New FID Methods
69
Setting Parameters for FID
70
About the TCD
71
TCD Pneumatics
73
TCD Carrier, Reference, and Makeup Gas
73
TCD Gas Pressures
74
Selecting Reference and Makeup Flows for the TCD
75
Chemically Active Compounds Reduce TCD Filament Life
75
Changing the TCD Polarity During a Run
76
Detecting Hydrogen with the TCD Using Helium Carrier Gas
76
Setting Parameters for the TCD
76
About the Μecd
79
Μecd Safety and Regulatory Information
79
Μecd Warnings
80
Μecd Gas Flows
82
Μecd Linearity
82
Μecd Detector Gas
82
Μecd Temperature
83
Μecd Analog Output
83
Recommended Starting Conditions for New Μecd Methods
83
Μecd Makeup Gas Notes
83
Μecd Temperature Programming
84
Setting Parameters for the Μecd
84
About the NPD
85
NPD Flows and General Information
85
NPD Flow, Temperature, and Bead Recommendations
86
NPD Required Gas Purity
87
Setting Parameters for the NPD
88
Selecting an NPD Bead Type
89
Selecting an NPD Jet
90
To Configure the NPD
91
Automatically Adjusting NPD Bead Voltage
92
Setting NPD Adjust Offset on the Clock Table
93
Aborting NPD Adjust Offset
93
Extending the NPD Bead Life
93
Setting the Initial Bead Voltage for New Beads
94
Setting NPD Bead Voltage Manually (Optional)
94
About the FPD
96
FPD + Linearity
97
FPD + Lit Offset
97
FPD + Photomultiplier Protection
97
FPD + Optical Filters
98
Inlet Liners for Use with the FPD
98
FPD + Temperature Considerations
98
FPD + Gas Purity
99
Gas Flows
99
Lighting the FPD + Flame
99
Setting Parameters for the FPD
100
About the FPD
102
FPD Linearity
103
FPD Lit Offset
103
Starting up and Shutting down the FPD
103
FPD Photomultiplier Protection
103
FPD Optical Filters
103
Inlet Liners for Use with the FPD
104
FPD Temperature Considerations
104
FPD Gas Purity
104
FPD Gas Flows
104
Lighting the FPD Flame
105
Setting Parameters for the FPD
106
6 Valves
110
The Valve Box
110
Heating the Valves
110
Valve Temperature Programming
110
Valve Control
111
The Valve Drivers
111
The Internal Valve Drivers
111
Valve Types
113
Configuring a Valve
114
Controlling a Valve
115
From the Keyboard
115
From the Run or Clock Time Tables
115
Gas Sampling Valve
115
7 GC Output Signals
118
About Signals
118
Analog Signals
119
Analog Zero
119
Analog Range
119
Analog Data Rates
120
Selecting Fast Peaks (Analog Output)
121
Digital Signals
122
Digital Zero
122
Signal Freeze and Resume
122
Data Rates with Agilent Data Systems
123
Zero Init Data Files
125
8 Auxiliary Devices
127
About Pressure Control
128
Pressure Units
128
Other manuals for Agilent Technologies 7820A
Manual
294 pages
Service Manual
397 pages
Operating Guide
66 pages
Safety Manual
18 pages
Installation Guide
44 pages
Quick Start Guide
30 pages
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Agilent Technologies 7820A Specifications
General
Brand
Agilent Technologies
Model
7820A
Category
Laboratory Equipment
Language
English
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