Agilent Technologies 7890B Operation Manual
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Agilent Technologies 7890B Operation Manual

Gas chromatograph
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Agilent 7890B
Gas Chromatograph
Operation Manual
Agilent Technologies

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  • Page 1 Agilent 7890B Gas Chromatograph Operation Manual Agilent Technologies...
  • Page 2 Further, to the max- agreement and written consent from calls attention to an operating imum extent permitted by applicable Agilent Technologies, Inc. as governed by procedure, practice, or the like that, if law, Agilent disclaims all warranties, United States and international copyright...

  • Page 3: Table Of Contents

    Contents Introduction Chromatography Using a GC The Operating Panel The display Status lights Beeping instrument Blinking setpoint The keypad Operating Basics Overview Instrument Control To Start Up the GC To Shut Down the GC for Less Than a Week To Shut Down the GC for More Than a Week Correcting Problems Keypad Operation The Run Keys...
  • Page 4 Methods and Sequences What Is a Method? What Is Saved in a Method? What Happens When You Load a Method? Creating Methods To load a method To store a method What Is a Sequence? Creating Sequences Automating Data Analysis, Method Development, and Sequence Development Running a Method or a Sequence from the Keypad Running Methods from the Keypad...
  • Page 5 To Check FPD Performance (Sample 5188-5245, Japan) Preparation Phosphorus performance Sulfur performance To Check FPD Performance (Sample 5188-5953) Preparation Phosphorus performance Sulfur performance To Check FPD Performance (Sample 5188-5245, Japan) Preparation Phosphorus performance Sulfur performance Resource Conservation Resource Conservation Sleep Methods Wake and Condition Methods To Set the GC to Conserve Resources To Edit an Instrument Schedule...
  • Page 6 GC-MS Features GC/MS Communications Venting the MSD MS Shutdown events To Set Up a Vent Method To Manually Prepare the GC for Venting the MS To Manually Exit the MS Vent State To Use the GC When the MSD is Shut Down To Enable or Disable MS Communications Configuration About Configuration...
  • Page 7 Analog out 1/Analog out 2 Fast peaks Valve Box To assign a GC power source to a valve box heater Thermal Aux PCM A/PCM B/PCM C Pressure aux 1,2,3/Pressure aux 4,5,6/Pressure aux 7,8,9 Status Time Valve # Front injector/Back injector Sample tray (7683 ALS) Instrument Using the Optional Barcode Reader...
  • Page 8 Operation Manual...

  • Page 9: Introduction

    Agilent 7890BGas Chromatograph Operation Manual Introduction Chromatography Using a GC The Operating Panel This document provides an overview of the individual components that make up the Agilent 7890B Gas Chromatograph (GC). Agilent Technologies...

  • Page 10: Chromatography Using A Gc

    Introduction Chromatography Using a GC Chromatography is the separation of a mixture of compounds into individual components. There are three major steps involved with separating and identifying components of a mixture using a GC. They are: Injecting a sample into the GC. (This takes place at the inlet.) Separating the sample into individual components.

  • Page 11: The Operating Panel

    Introduction The Operating Panel The operating panel consists of the display, status lights, and keypad. See “Keypad Operation” and the Advanced Operation Manual, along with the complete suite of documentation included on the Agilent GC and GC/MS User Manuals & Tools DVDs that are included with your GC shipment for more detailed information.

  • Page 12: The Display

    Status lights The status lights provide a basic look at what is currently happening inside the Agilent 7890B GC. A lit LED on the status board indicates: • The current progress of a run (Pre Run, Post Run, and Run).

  • Page 13: Beeping Instrument

    Introduction • The GC is programmed for events to occur at specified times (Clock Table). The GC is in gas saver mode (Gas Saver). • Beeping instrument A single beep means that a problem exists, but the problem will not prevent the GC from executing the run. The GC will emit one beep and display a message.

  • Page 14: The Keypad

    Introduction The keypad All of the parameters required to operate the Agilent 7890B GC can be entered through the GC’s keypad. Normally, however, most of these parameters are controlled using an attached data system, such as Agilent’s OpenLAB CDS or MassHunter software.
  • Page 15 To Shut Down the GC for Less Than a Week To Shut Down the GC for More Than a Week Correcting Problems This section describes a few basic tasks that an operator performs when using the Agilent 7890B GC. Agilent Technologies...

  • Page 16: Operating Basics

    Operating Basics Overview Operating the GC involves the following tasks: • Setting up the GC hardware for an analytical method. • Starting up the GC. See “To Start Up the GC”. • Preparing the automatic liquid sampler. Install the method- defined syringe; configure solvent and waste bottle usage and syringe size;...

  • Page 17: Instrument Control

    Operating Basics Instrument Control The Agilent 7890B GC is typically controlled by an attached data system such as Agilent OpenLAB CDS. Alternately, the GC can be controlled entirely from its keypad, with output data being sent to an attached integrator for report generation.

  • Page 18: To Start Up The Gc

    Operating Basics To Start Up the GC Successful operation begins with a properly installed and maintained GC. The utility requirements for gases, power supply, venting of hazardous chemicals, and required operational clearances around the GC are detailed in the Agilent GC, GC/MS, and ALS Site Preparation Guide.

  • Page 19: To Shut Down The Gc For Less Than A Week

    Operating Basics To Shut Down the GC for Less Than a Week Wait for the current run to finish. If the active method has been modified, save the changes. Never leave flammable gas flows on if the GC will be unmonitored. WA R N I N G If a leak develops, the gas could create a fire or explosion hazard.

  • Page 20: To Shut Down The Gc For More Than A Week

    Operating Basics To Shut Down the GC for More Than a Week Maintaining Your GC manual for procedures for installing columns, consumables, and so on. Load a GC maintenance method and wait for the GC to become ready. For more information about creating maintenance methods, see the Maintaining Your GC manual.

  • Page 21: Correcting Problems

    Operating Basics Correcting Problems If the GC stops operation because of a fault, check the display for any messages. Press [Status] and scroll to view any additional messages. Use the keyboard or data system to stop the alert tone. Press [Off/No] on the keyboard or turn off the offending component in the data system.
  • Page 22 Operating Basics Operation Manual...
  • Page 23 Keypad Functionality When the GC Is Controlled by an Agilent Data System The Service Mode Key About GC Status About Logs This section describes the basic operation of the Agilent 7890B GC keypad. For additional information on keypad functionality, see the Advanced Operation Manual. Agilent Technologies...

  • Page 24: Keypad Operation

    Keypad Operation The Run Keys These keys are used to start, stop, and prepare the GC to run a sample. [Prep Run] Activates processes required to bring the GC to the starting condition dictated by the method (such as turning off the inlet purge flow for a splitless injection or restoring normal flow from gas saver mode).

  • Page 25: The Gc Component Keys

    Keypad Operation The GC Component Keys These keys are used to set the temperature, pressure, flow, velocity, and other method operating parameters. To display the current settings, press any one of these keys. More than three lines of information may be available. Use the scroll keys to view additional lines, if necessary.

  • Page 26: The Status Key

    Keypad Operation The Status Key [Status] Displays “ready,” “not ready,” and “fault” information. When the Not Ready status light is blinking, a fault has occurred. Press [Status] to see which parameters are not ready and what fault has occurred. The order in which items appear in the scrolling display window for [Status] can be modified.

  • Page 27: The Info Key

    Keypad Operation The Info Key [Info] Provides help for the currently shown parameter. For example, if Oven Temp is the active line in the display (has a < next to it), [Info] will display the valid range of oven temperatures. In other cases, [Info] will display definitions or actions that need to be performed.

  • Page 28: The General Data Entry Keys

    Keypad Operation The General Data Entry Keys [Mode/Type] Accesses a list of possible parameters associated with a component’s nonnumeric settings. For example, if the GC is configured with a split/splitless inlet and the [Mode/Type] key is pressed, the options listed will be split, splitless, pulsed split, or pulsed splitless.

  • Page 29: The Supporting Keys

    Keypad Operation The Supporting Keys [Time] Displays the current date and time on the first line. The two middle lines show the time between runs, the elapsed time and time remaining during a run, and the last run time and post- time during a post- run.

  • Page 30: Method Storage And Automation Keys

    Keypad Operation Method Storage and Automation Keys These keys are for loading and storing methods and sequences locally on your GC. They cannot be used to access methods and sequences stored by your Agilent data system. [Load] Are used together to load and store methods [Method] and sequences on your GC.

  • Page 31: Keypad Functionality When The Gc Is Controlled By An Agilent Data System

    Keypad Operation Keypad Functionality When the GC Is Controlled by an Agilent Data System When an Agilent data system controls the GC, the data system defines the setpoints and runs the samples. If configured to lock the keypad, the data system can prevent the changing of setpoints.

  • Page 32: About Gc Status

    Keypad Operation About GC Status When the GC is ready to begin a run, the display screen shows STATUS Ready for Injection. Alternately, when a component of the GC is not ready to begin a run, the Not Ready LED is lit on the status board. Press [Status] to see a message explaining why the GC is not ready.

  • Page 33: Error Conditions

    Keypad Operation A continuous tone sounds if a hydrogen flow is shut down or a thermal shutdown occurs. Before resuming GC operations, investigate and resolve the cause WA R N I N G of the hydrogen shutdown. See Hydrogen Shutdown in the Troubleshooting manual for details.
  • Page 34 Keypad Operation If the shutdown includes safety concerns, for example a shutdown for hydrogen carrier gas flow, you must power cycle the GC. See the Troubleshooting manual for more information. Operation Manual...

  • Page 35: About Logs

    Keypad Operation About Logs Three logs are accessible from the keypad: the run log, the maintenance log, and the system event log. To access the logs, press [Logs] then scroll to the desired log and press [Enter]. The display will indicate the number of entries the log contains.
  • Page 36 Keypad Operation Operation Manual...
  • Page 37 Agilent 7890B Gas Chromatograph Operation Manual Methods and Sequences What Is a Method? What Is Saved in a Method? What Happens When You Load a Method? Creating Methods To program a method To load a method To store a method...

  • Page 38: Methods And Sequences

    Methods and Sequences What Is a Method? A method is the group of settings required to analyze a specific sample. Since every type of sample reacts differently in the GC—some samples require a higher oven temperature, others require a lower gas pressure or a different detector—a unique method must be created for each specific type of analysis.

  • Page 39: What Happens When You Load A Method

    Methods and Sequences What Happens When You Load a Method? There are two kinds of methods: • The active method—This is sometimes referred to as the current method. The settings defined in this method are the settings the GC is currently maintaining. •...

  • Page 40: Creating Methods

    Methods and Sequences Creating Methods A method is the group of setpoints needed to run a single sample on the GC, such as oven temperature programs, pressure programs, inlet temperatures, sampler parameters, and so forth. A method is created by saving a group of setpoints as a numbered method using the [Store] key.

  • Page 41: To Load A Method

    Methods and Sequences To program a method Individually select each component for which setpoint parameters are appropriate for your method. (See Table Examine the current setpoints and modify as desired. Repeat for each component as appropriate. Examine the current setpoints for the ALS, if appropriate, and modify as desired.
  • Page 42 Methods and Sequences When you try to load one of your stored methods, you observe an error message saying that the method and the hardware do not match. The problem is that the actual hardware is no longer the same as the hardware configuration saved in the method. The method cannot run because it does not know how to operate the recently- added TCD.

  • Page 43: What Is A Sequence

    Methods and Sequences What Is a Sequence? A sequence is a list of samples to be analyzed along with the method to be used for each analysis. Refer to “Running a Method or a Sequence from the Keypad” “Creating Sequences” for details on how to create, load, modify, and save sequences using the keypad.

  • Page 44: About The Priority Sequence

    Methods and Sequences About the priority sequence The priority sequence consists of a single sampler or valve subsequence and a special Use priority parameter, which can be activated at any time, even when a sequence is running. This feature allows you to interrupt a running sequence without having to edit it.

  • Page 45: To Program A Priority Sequence

    Methods and Sequences To program a priority sequence Press [Seq]. (Press again, if necessary, to display subsequence information.) Scroll to Priority Method # and enter a method number. Use 1 to 9 for the stored methods, 0 for the currently active method, or [Off/No] to end the sequence.

  • Page 46: To Program A Valve Subsequence

    Methods and Sequences To program a valve subsequence step 1 through step 3 “To program a sequence” page 44. Press [Mode/Type] and select Valve. Enter the valve sequence parameters (the first three appear only if a multiposition valve is configured): •...

  • Page 47: Automating Data Analysis, Method Development, And Sequence Development

    Methods and Sequences To load a stored sequence Press [Load][Seq]. Enter the number of the sequence to be loaded (1–9). Press [On/Yes] to load the sequence or [Off/No] to cancel the load. An error message is displayed if the specified sequence number has not been stored.
  • Page 48 Methods and Sequences Operation Manual...

  • Page 49: Running A Method Or A Sequence From The Keypad

    Agilent 7890B Gas Chromatograph Operation Manual Running a Method or a Sequence from the Keypad Running Methods from the Keypad Running Sequences from the Keypad This section explains how to load, store, and run a method or sequence using the GC keypad, without the use of an Agilent data system.

  • Page 50: Running Methods From The Keypad

    Running a Method or a Sequence from the Keypad Running Methods from the Keypad To manually inject a sample with a syringe and start a run Prepare the sample syringe for injection. Load the desired method. (See "To load a method".) Press [Prep Run].

  • Page 51: Running Sequences From The Keypad

    Running a Method or a Sequence from the Keypad Running Sequences from the Keypad A sequence can specify up to five subsequences to be run, as well as priority (ALS only) and post- run sequences, if defined. Each sequence is stored as a number (from 1 to 9). To start running a sequence Load the sequence.

  • Page 52: To Resume A Paused Sequence

    Running a Method or a Sequence from the Keypad To resume a paused sequence Press [Seq Control]. Scroll to Resume sequence and press [Enter]. The sequence resumes with the next sample. To stop a running sequence Press [Seq Control]. Scroll to Stop sequence and press [Enter]. The sequence stops at the end of the currently running subsequence unless [Seq] >...

  • Page 53: Chromatographic Checkout

    Agilent 7890B Gas Chromatograph Operation Manual Chromatographic Checkout About Chromatographic Checkout To Prepare for Chromatographic Checkout To Check FID Performance To Check TCD Performance To Check NPD Performance To Check uECD Performance To Check FPD+ Performance (Sample 5188-5953) To Check FPD+ Performance (Sample 5188-5245, Japan)

  • Page 54: About Chromatographic Checkout

    Chromatographic Checkout About Chromatographic Checkout The tests described in this section provide basic confirmation that the GC and detector can perform comparably to factory condition. However, as detectors and the other parts of the GC age, detector performance can change. The results presented here represent typical outputs for typical operating conditions and are not specifications.

  • Page 55: To Prepare For Chromatographic Checkout

    Chromatographic Checkout To Prepare for Chromatographic Checkout Because of the differences in chromatographic performance associated with different consumables, Agilent strongly recommends using the parts listed here for all checkout tests. Agilent also recommends installing new consumable parts whenever the quality of the installed ones is not known.
  • Page 56 Chromatographic Checkout Table 3 Recommended parts for checkout by inlet type (continued) Recommended part for checkout Part number Septum 5183-4757 Cool on-column inlet Septum 5183-4758 Septum nut 19245-80521 Syringe, 5-µL on-column 5182-0836 0.32-mm needle for 5-µL syringe 5182-0831 7693A ALS: Needle support insert, COC G4513-40529 7683B ALS: Needle support assembly for 0.25/0.32 mm G2913-60977...

  • Page 57: To Check Fid Performance

    Chromatographic Checkout To Check FID Performance Gather the following: • Evaluation column, HP- 5 30 m × 0.32 mm × 0.25 µm (19091J- 413) • FID performance evaluation (checkout) sample (5188- 5372) • Chromatographic- grade isooctane • 4- mL solvent and waste bottles or equivalent for autoinjector •...
  • Page 58 Chromatographic Checkout • Check that the flame is lit. • Check that the signal is set to the correct detector. Create or load a method with the parameter values listed Table Table 4 FID Checkout Conditions Column and sample Type HP-5, 30 m ×...
  • Page 59 Chromatographic Checkout Table 4 FID Checkout Conditions (continued) Septum purge 15 mL/min PTV inlet Mode Splitless Inlet temperature 75 °C Initial time 0.1 min Rate 1 720 °C/min Final temp 1 350 °C Final time 1 2 min Rate 2 100 °C/min Final temp 2 250 °C...
  • Page 60 Chromatographic Checkout Table 4 FID Checkout Conditions (continued) Solvent A pre washes Solvent A post washes Solvent A wash volume Solvent B pre washes Solvent B post washes Solvent B wash volume Injection mode (7693A) Normal Airgap Volume (7693A) 0.20 Viscosity delay Inject Dispense Speed (7693A) 6000...
  • Page 61 Chromatographic Checkout If performing a manual injection (with or without a data system): Press [Prep Run] to prepare the inlet for splitless injection. When the GC becomes ready, inject 1 µL of the checkout sample and press [Start] on the GC. The following chromatogram shows typical results for a new detector with new consumable parts installed and nitrogen makeup gas.

  • Page 62: To Check Tcd Performance

    Chromatographic Checkout To Check TCD Performance Gather the following: • Evaluation column, HP- 5 30 m × 0.32 mm × 0.25 µm (19091J- 413) • FID/TCD performance evaluation (checkout) sample (18710- 60170) • 4- mL solvent and waste bottles or equivalent for autoinjector •...
  • Page 63 Chromatographic Checkout Table 5 TCD Checkout Conditions (continued) Column flow 6.5 mL/min Column mode Constant flow Split/splitless inlet Temperature 250 °C Mode Splitless Purge flow 60 mL/min Purge time 0.75 min Septum purge 3 mL/min Multimode inlet Mode Splitless Inlet temperature 40 °C Initial time 0.1 min...
  • Page 64 Chromatographic Checkout Table 5 TCD Checkout Conditions (continued) Final temp 2 250 °C Final time 2 0 min Purge time 0.5 min Purge flow 40 mL/min Septum purge 3 mL/min Detector Temperature 300 °C Reference flow (He) 20 mL/min Makeup flow (He) 2 mL/min Baseline output <...
  • Page 65 Chromatographic Checkout Table 5 TCD Checkout Conditions (continued) Solvent B wash volume Injection mode (7693A) Normal Airgap Volume (7693A) 0.20 Viscosity delay Inject Dispense Speed (7693A) 6000 Plunger speed (7683) Fast, for all inlets except COC. PreInjection dwell PostInjection dwell Manual injection Injection volume 1 µL...
  • Page 66 Chromatographic Checkout If performing a manual injection (with or without a data system): Press [Prep Run] to prepare the inlet for splitless injection. When the GC becomes ready, inject 1 µL of the checkout sample and press [Start] on the GC. The following chromatogram shows typical results for a new detector with new consumable parts installed.

  • Page 67: To Check Npd Performance

    Chromatographic Checkout To Check NPD Performance Gather the following: • Evaluation column, HP- 5 30 m × 0.32 mm × 0.25 µm (19091J- 413) • NPD performance evaluation (checkout) sample (18789- 60060) • 4- mL solvent and waste bottles or equivalent for autoinjector.
  • Page 68 Chromatographic Checkout Table 6 NPD Checkout Conditions Column and sample Type HP-5, 30 m × 0.32 mm × 0.25 µm (19091J-413) Sample NPD checkout 18789-60060 Column mode Constant flow Column flow 6.5 mL/min (helium) Split/splitless inlet Temperature 200 °C Mode Splitless Purge flow 60 mL/min...
  • Page 69 Chromatographic Checkout Table 6 NPD Checkout Conditions (continued) Initial time 0.1 min Rate 1 720 °C/min Final temp 1 350 °C Final time 1 2 min Rate 2 100 °C/min Final temp 2 250 °C Final time 2 0 min Purge time 0.75 min Purge flow...
  • Page 70 Chromatographic Checkout Table 6 NPD Checkout Conditions (continued) Solvent B post washes Solvent B wash volume Injection mode (7693A) Normal Airgap Volume (7693A) 0.20 Viscosity delay Inject Dispense Speed (7693A) 6000 Plunger speed (7683) Fast, for all inlets except COC. PreInjection dwell PostInjection dwell Manual injection...
  • Page 71 Chromatographic Checkout NPD1 B, (C:\NPD.D) Malathion Azobenzene Octadecane Operation Manual...

  • Page 72: To Check Uecd Performance

    Chromatographic Checkout To Check uECD Performance Gather the following: • Evaluation column, HP- 5 30 m × 0.32 mm × 0.25 µm (19091J- 413) • uECD performance evaluation (checkout) sample (18713–60040, Japan: 5183- 0379) • 4- mL solvent and waste bottles or equivalent for autoinjector.
  • Page 73 Chromatographic Checkout • If the baseline output is > 1000 Hz, there may be chemical contamination contributing to the signal. Bakeout the uECD. If repeated cleanings do not give an acceptable signal, check gas purity. Use higher purity gases and/or install traps. Create or load a method with the parameter values listed Table Table 7...
  • Page 74 Chromatographic Checkout Table 7 uECD Checkout Conditions (continued) Cool on-column inlet Temperature Oven track Septum purge 15 mL/min PTV inlet Mode Splitless Inlet temperature 80 °C Initial time 0.1 min Rate 1 720 °C/min Final temp 1 350 °C Final time 1 2 min Rate 2 100 °C/min...
  • Page 75 Chromatographic Checkout Table 7 uECD Checkout Conditions (continued) Injection volume 1 µL Syringe size 10 µL Solvent A pre washes Solvent A post washes Solvent A wash volume Solvent B pre washes Solvent B post washes Solvent B wash volume Injection mode (7693A) Normal Airgap Volume (7693A)
  • Page 76 Chromatographic Checkout Aldrin peak will be missing when using the Japanese sample 5183- 0379. ECD1 B, (C:\ECD.D) Lindane 12000 (18713-60040 5183-0379) 10000 8000 Aldrin 6000 (18713-60040) 4000 2000 Operation Manual...

  • Page 77: To Check Fpd + Performance (Sample 5188-5953)

    Chromatographic Checkout To Check FPD Performance (Sample 5188-5953) To check FPD performance, first check the phosphorus performance, then the sulfur performance. Preparation Gather the following: • Evaluation column, HP- 5 30 m × 0.32 mm × 0.25 µm (19091J- 413) •...

  • Page 78: Phosphorus Performance

    Chromatographic Checkout Phosphorus performance If it is not already installed, install the phosphorus filter. Create or load a method with the parameter values listed Table Table 8 Checkout Conditions (P) Column and sample Type HP-5, 30 m × 0.32 mm × 0.25 µm (19091J-413) Sample FPD checkout...
  • Page 79 Chromatographic Checkout Table 8 Checkout Conditions (continued)(P) Septum purge 15 mL/min PTV inlet Mode Splitless Inlet temperature 75 °C Initial time 0.1 min Rate 1 720 °C/min Final temp 1 350 °C Final time 1 2 min Rate 2 100 °C/min Final temp 2 250 °C Final time 2...
  • Page 80 Chromatographic Checkout Table 8 Checkout Conditions (continued)(P) Final temp 2 190 °C Final time 2 4 min ALS settings (if installed) Sample washes Sample pumps Sample wash volume Injection volume 1 µL Syringe size 10 µL Solvent A pre washes Solvent A post washes Solvent A wash volume Solvent B pre washes...
  • Page 81 Chromatographic Checkout Display the signal output and monitor. This output typically runs between 40 and 55 but can be as high as 70. Wait for the output to stabilize. This takes approximately 1 hour. If the baseline output is too high: •...

  • Page 82: Sulfur Performance

    Chromatographic Checkout If performing a manual injection (with or without a data system): Press [Prep Run] to prepare the inlet for splitless injection. When the GC becomes ready, inject 1 µL of the checkout sample and press [Start] on the GC. The following chromatogram shows typical results for a new detector with new consumable parts installed.
  • Page 83 Chromatographic Checkout If the baseline output is zero, verify the electrometer is on and the flame is lit. If using a data system, prepare the data system to perform one run using the loaded checkout method. Make sure that the data system will output a chromatogram. Start the run.

  • Page 84: To Check Fpd + Performance (Sample 5188-5245, Japan)

    Chromatographic Checkout To Check FPD Performance (Sample 5188-5245, Japan) To verify FPD performance, first check the phosphorus performance, then the sulfur performance. Preparation Gather the following: • Evaluation column, DB5 15 m × 0.32 mm × 1.0 µm (123- 5513) •...

  • Page 85: Phosphorus Performance

    Chromatographic Checkout • Set the oven, inlet, and detector to 250 °C and bake out for at least 15 minutes. (See the procedure for the SS, PP, COC, MMI, in the Maintenance manual.) • Configure the column. Phosphorus performance If it is not already installed, install the phosphorus filter.
  • Page 86 Chromatographic Checkout Table 9 Phosphorus Checkout Conditions (continued) Packed column inlet Temperature 250 °C Septum purge 3 mL/min Cool on-column inlet Temperature Oven track Septum purge 15 mL/min PTV inlet Mode Splitless Inlet temperature 80 °C Initial time 0.1 min Rate 1 720 °C/min Final temp 1...
  • Page 87 Chromatographic Checkout Table 9 Phosphorus Checkout Conditions (continued) Initial time 0 min Rate 1 10 °C/min Final temp 105 °C Final time 0 min Rate 2 20 °C/min Final temp 2 190 °C Final time 2 7.25 min for sulfur 12.25 min for phosphorus ALS settings (if installed) Sample washes...
  • Page 88 Chromatographic Checkout Ignite the FPD flame, if not lit. Display the signal output and monitor. This output typically runs between 40 and 55 but can be as high as 70. Wait for the output to stabilize. This takes approximately 1 hour. If the baseline output is too high: •...

  • Page 89: Sulfur Performance

    Chromatographic Checkout The following chromatogram shows typical results for a new detector with new consumable parts installed. Tributylphosphate Isooctane t-Butyldisulfide Sulfur performance Install the sulfur filter. Ignite the FPD flame, if not lit. Display the signal output and monitor. This output typically runs between 50 and 60 but can be as high as 70.
  • Page 90 Chromatographic Checkout Start the run. If performing an injection using an autosampler, start the run using the data system or press [Start] on the GC. If performing a manual injection (with or without a data system): Press [Prep Run] to prepare the inlet for splitless injection.

  • Page 91: To Check Fpd Performance (Sample 5188-5953)

    Chromatographic Checkout To Check FPD Performance (Sample 5188-5953) To check FPD performance, first check the phosphorus performance, then the sulfur performance. Preparation Gather the following: • Evaluation column, HP- 5 30 m × 0.32 mm × 0.25 µm (19091J- 413) •...

  • Page 92: Phosphorus Performance

    Chromatographic Checkout Phosphorus performance If it is not already installed, install the phosphorus filter. Create or load a method with the parameter values listed Table Table 10 FPD Checkout Conditions (P) Column and sample Type HP-5, 30 m × 0.32 mm × 0.25 µm (19091J-413) Sample FPD checkout...
  • Page 93 Chromatographic Checkout Table 10 FPD Checkout Conditions (continued)(P) Septum purge 15 mL/min PTV inlet Mode Splitless Inlet temperature 75 °C Initial time 0.1 min Rate 1 720 °C/min Final temp 1 350 °C Final time 1 2 min Rate 2 100 °C/min Final temp 2 250 °C...
  • Page 94 Chromatographic Checkout Table 10 FPD Checkout Conditions (continued)(P) Final time 2 4 min ALS settings (if installed) Sample washes Sample pumps Sample wash volume Injection volume 1 µL Syringe size 10 µL Solvent A pre washes Solvent A post washes Solvent A wash volume Solvent B pre washes Solvent B post washes...
  • Page 95 Chromatographic Checkout Display the signal output and monitor. This output typically runs between 40 and 55 but can be as high as 70. Wait for the output to stabilize. This takes approximately 1 hour. If the baseline output is too high: •...

  • Page 96: Sulfur Performance

    Chromatographic Checkout If performing a manual injection (with or without a data system): Press [Prep Run] to prepare the inlet for splitless injection. When the GC becomes ready, inject 1 µL of the checkout sample and press [Start] on the GC. The following chromatogram shows typical results for a new detector with new consumable parts installed.
  • Page 97 Chromatographic Checkout 70. Wait for the output to stabilize. This takes approximately 1 hour. If the baseline output is too high: • Check column installation. If installed too high, the stationery phase burns in the flame and increases measured output. •...
  • Page 98 Chromatographic Checkout Methylparathion Isooctane Operation Manual...

  • Page 99: To Check Fpd Performance (Sample 5188-5245, Japan)

    Chromatographic Checkout To Check FPD Performance (Sample 5188-5245, Japan) To verify FPD performance, first check the phosphorus performance, then the sulfur performance. Preparation Gather the following: • Evaluation column, DB5 15 m × 0.32 mm × 1.0 µm (123- 5513) •...

  • Page 100: Phosphorus Performance

    Chromatographic Checkout Install the evaluation column. (See the procedure for the SS, PP, COC, MMI, in the Maintenance manual.) • Set the oven, inlet, and detector to 250 °C and bake out for at least 15 minutes. (See the procedure for the SS, PP, COC, MMI, in the Maintenance manual.)
  • Page 101 Chromatographic Checkout Table 12 FPD Phosphorus Checkout Conditions (continued) Septum purge 3 mL/min Packed column inlet Temperature 250 °C Septum purge 3 mL/min Cool on-column inlet Temperature Oven track Septum purge 15 mL/min PTV inlet Mode Splitless Inlet temperature 80 °C Initial time 0.1 min Rate 1...
  • Page 102 Chromatographic Checkout Table 12 FPD Phosphorus Checkout Conditions (continued) Initial temp 70 °C Initial time 0 min Rate 1 10 °C/min Final temp 105 °C Final time 0 min Rate 2 20 °C/min Final temp 2 190 °C Final time 2 7.25 min for sulfur 12.25 min for phosphorus ALS settings (if installed)
  • Page 103 Chromatographic Checkout Ignite the FPD flame, if not lit. Display the signal output and monitor. This output typically runs between 40 and 55 but can be as high as 70. Wait for the output to stabilize. This takes approximately 1 hour. If the baseline output is too high: •...

  • Page 104: Sulfur Performance

    Chromatographic Checkout The following chromatogram shows typical results for a new detector with new consumable parts installed. Tributylphosphate Isooctane t-Butyldisulfide Sulfur performance Install the sulfur filter. Make the following method parameter changes. Table 13 Sulfur method parameters Parameter Value ( mL/min) H2 flow Air flow Ignite the FPD flame, if not lit.
  • Page 105 Chromatographic Checkout • Bake out the detector and column at 250 °C. • Wrong flows set for installed filter If the baseline output is zero, verify the electrometer is on and the flame is lit. If using a data system, prepare the data system to perform one run using the loaded checkout method.
  • Page 106 Chromatographic Checkout Operation Manual...
  • Page 107 Agilent 7890B Gas Chromatograph Operation Manual Resource Conservation Resource Conservation Sleep Methods Wake and Condition Methods To Set the GC to Conserve Resources To Edit an Instrument Schedule To Create or Edit a Sleep, Wake, or Condition Method To Put the GC to Sleep Now...

  • Page 108: Resource Conservation

    Resource Conservation Resource Conservation The 7890B GC provides an instrument schedule to conserve resources such as electricity and gases. Using the instrument schedule, you can create sleep, wake, and conditioning methods that allow you to program resource usage. A SLEEP method sets low flows and temperatures.
  • Page 109 Resource Conservation Table 14 Sleep method recommendations GC Component Comment • Columns and oven Reduce temperature to save power. • Turn off to save the most power. • Maintain some carrier gas flow to protect the columns. Inlets For all inlets: •...

  • Page 110: Wake And Condition Methods

    Resource Conservation Table 14 Sleep method recommendations (continued) GC Component Comment Other devices • Valve box Reduce temperature. (Keep valve box temperature high enough to prevent sample condensation, if applicable.) • Aux thermal zones Reduce or turn off. Also refer to connected device manuals, for example for a connected MSD.
  • Page 111 Resource Conservation duration of the method’s oven program. When the program ends, the GC loads either the WAKE method or the last active method before sleep, as specified in the instrument schedule (or when manually exiting the sleep state). One possible use for a condition method is to set higher than normal temperatures and flows to bake out any possible contamination that may have collected in the GC during sleep.

  • Page 112: To Set The Gc To Conserve Resources

    Resource Conservation To Set the GC to Conserve Resources Set the GC to conserve resources by creating and using an Instrument Schedule. Decide how to restore flows. The choices are: • Wake current: At the specified time, the GC will restore the last active method used before it went to sleep.
  • Page 113 Resource Conservation Create the Instrument Schedule. Press [Clock Table], scroll to Instrument Schedule, then press [Enter]. INST SCHEDULE Go to sleep now. < Edit the Instrument Schedule? Edit clock table? Actual Setpoint Press [Mode/Type] to create a new schedule item. When prompted, scroll to the desired day of the week and press [Enter].
  • Page 114 Resource Conservation When prompted, select the desired wake function, press [Enter], then input the event time. Press [Enter]. (See step 2 for descriptions of the wake functions.) INST SCHEDULE ( 2 of Monday: 07:30< Type: Wake with WAKE file. Actual Setpoint Repeat steps through...

  • Page 115: To Edit An Instrument Schedule

    Resource Conservation To Edit an Instrument Schedule To edit an existing schedule, delete unwanted items, then add new items as desired. Press [Clock Table], scroll to Instrument Schedule, then press [Enter]. INST SCHEDULE Go to sleep now. < Edit the Instrument Schedule? Edit clock table? Actual Setpoint...

  • Page 116: To Create Or Edit A Sleep, Wake, Or Condition Method

    Resource Conservation To Create or Edit a Sleep, Wake, or Condition Method To create or edit a SLEEP, WAKE, or CONDITION method: If desired, load a method with similar setpoints. Edit the method setpoints. The GC allows for setting only relevant parameters: •...

  • Page 117: To Put The Gc To Sleep Now

    Resource Conservation To Put the GC to Sleep Now Press [Clock Table], select Instrument Schedule, then press [Enter]. Select Go to sleep now, then press [Enter]. INST SCHEDULE Go to sleep now. < Edit the Instrument Schedule? Edit clock table? Actual Setpoint Operation Manual...

  • Page 118: To Wake The Gc Now

    Resource Conservation To Wake the GC Now If the GC is asleep, you can wake it up as follows: Press [Clock Table], select to Instrument Schedule, then press [Enter]. Select the desired wake choice, then press [Enter]. • Wake up now (restore method). Exit sleep mode by loading the last active method used before going to sleep.
  • Page 119 To Enable or Change a Limit for an EMF Counter To Disable an EMF Counter To Reset an EMF Counter EMF Counters for Autosamplers EMF Counters for MS Instruments This section describes the Early Maintenance Feedback feature available on the Agilent 7890B GC. Agilent Technologies...

  • Page 120: Early Maintenance Feedback (Emf)

    Early Maintenance Feedback Early Maintenance Feedback (EMF) The 7890B provides injection- and time- based counters for various consumable and maintenance parts. Use these counters to track usage and replace or recondition these items before potential degradation impacts the chromatographic results.

  • Page 121: Thresholds

    Early Maintenance Feedback Thresholds The EMF feature provides two warning thresholds: Service due and Service warning. • Service Due: When the counter exceeds this number of injections or days, the Service Due indicator lights and an entry is made in the Maintenance Log. The Service Due limit must be larger than the Service warning limit.

  • Page 122: Default Thresholds

    Early Maintenance Feedback Default Thresholds Selected counters have default thresholds to use as a starting point. To view any available information for a counter: Navigate to the desired counter and press [Enter]. See “To Enable or Change a Limit for an EMF Counter”.

  • Page 123: Available Counters

    Early Maintenance Feedback Available Counters Table 15 lists the most common counters available. The available counters will vary based on the installed GC options, consumables, and future updates. Table 15 Common EMF counters GC Component Parts with a counter Type Default value Detectors Collector...
  • Page 124 Early Maintenance Feedback Table 15 Common EMF counters (continued) GC Component Parts with a counter Type Default value Liner O-ring Time 60 days Septum Number of injections Split vent trap Number of injections 10,000 Split vent trap Time 6 months Liner Number of injections Liner...
  • Page 125 Early Maintenance Feedback Table 15 Common EMF counters (continued) GC Component Parts with a counter Type Default value Length Value Valves Valve Rotor Activations (number of injections) Maximum temperature Value Instrument Instrument On time Time Run count Number of injections Filters Time ALS Injectors...

  • Page 126: To Enable Or Change A Limit For An Emf Counter

    Early Maintenance Feedback To Enable or Change a Limit for an EMF Counter When using the GC without a data system, enable or change the limit for a counter as follows: Press [Service Mode]. Scroll to Maintenance and press [Enter]. Scroll to the desired GC component (front or back inlet, front or back detector, valves, instrument, and so forth) and press [Enter] to select it.

  • Page 127: To Disable An Emf Counter

    Early Maintenance Feedback To Disable an EMF Counter When using the GC without a data system, disable a counter as follows: Press [Service Mode]. Scroll to Maintenance and press [Enter]. Scroll to the desired GC component (front or back inlet, front or back detector, valves, instrument, and so forth) and press [Enter] to select it.

  • Page 128: To Reset An Emf Counter

    Early Maintenance Feedback To Reset an EMF Counter When a Service Due counter passes its threshold, the GC Service Due indicator lights. Press [Service Mode]. Scroll to Maintenance and press [Enter]. Each EMF component with a counter that passed its threshold will be marked with an asterisk.

  • Page 129: Emf Counters For Autosamplers

    The GC provides access to the counters for the autosampler. The functionality for ALS counters depends on the ALS model and firmware version. In all cases, the 7890B GC shows EMF counter status and allows you to enable, disable, and clear the counters using the GC keyboard.

  • Page 130: Emf Counters For Ms Instruments

    Early Maintenance Feedback EMF Counters for MS Instruments When connected to an Agilent 5977 Series MSD, the GC reports the EMF counters as tracked by the MSD. The 5977 Series MSD provides its own EMF tracking. When connected to an earlier model MS or MSD (for example, a 5975 Series MSD), the GC tracks the MS counters, not the MS.
  • Page 131 To Manually Prepare the GC for Venting the MS To Manually Exit the MS Vent State To Use the GC When the MSD is Shut Down To Enable or Disable MS Communications This section describes the communications and features of a 7890B- 5977 Series MSD system. Agilent Technologies...

  • Page 132: Gc-Ms Features

    GC-MS Features GC/MS Communications When the 7890B GC and a 5977 Series MSD (or other MS instrument with Smart Technologies) are configured together, they communicate with and react to each other. (See the Installation and First Startup manual for configuration details.) The two most important events that cause...
  • Page 133 GC-MS Features • If using a flammable carrier gas, the gas is turned off after the oven cools (for the MS column flow path only). • If not using a flammable carrier gas, the GC will set very low flows at each flow- or pressure- controlled device leading back through the column configuration chain to the inlet.

  • Page 134: To Set Up A Vent Method

    GC-MS Features To Set Up a Vent Method A good MS Vent method does the following: • Turns off the MS transfer line heater. • Turns off the inlet heater. • Sets the oven to a low temperature, < 50 °C. •...

  • Page 135: To Manually Prepare The Gc For Venting The Ms

    GC-MS Features To Manually Prepare the GC for Venting the MS If using an MS that does not communicate events to the GC (beyond a simple start/stop), you can still prepare the GC for venting by loading the MS Vent method. To manually load the MS Vent method: Press [Method], scroll to MS Vent, and press [Load].

  • Page 136: To Manually Exit The Ms Vent State

    GC-MS Features To Manually Exit the MS Vent State Manually exiting the MS Vent state when the GC and MS are still C A U T I O N connected and the MS is venting or off can damage the MS if you set inappropriate flows.

  • Page 137: To Use The Gc When The Msd Is Shut Down

    GC-MS Features To Use the GC When the MSD is Shut Down To use the GC while an MS is being repaired or maintained, do the following: Disable MS communications. Press [Aux Det #], scroll to MS Communication, then press [Off/No]. Scroll to Clear MS Shutdown, then press [Enter].

  • Page 138: To Enable Or Disable Ms Communications

    GC-MS Features To Enable or Disable MS Communications Press [Aux Det #]. Scroll to MS Communication. The entry will read On if enabled, or Disabled if disabled. Press [Off/No] to disable. The line will read MS Communication Disabled. Press [On/Yes] to enable communications. Operation Manual...

  • Page 139: Configuration

    Agilent 7890B Gas Chromatograph Operation Manual Configuration About Configuration Assigning GC resources to a device Setting configuration properties General Topics To Unlock the GC Configuration Ignore Ready = Information displays Unconfigured: Oven Front Inlet/Back Inlet To configure the PTV or COC coolant...

  • Page 140: About Configuration

    Configuration About Configuration Configuration is a two- part process for most GC accessory devices that require power and/or communication resources from the GC. In the first part of the configuration process, a power and/or communication resource is assigned to the device.

  • Page 141: Setting Configuration Properties

    Configuration Aux EPC 7,8,9 Status Time Valve # 2 Dimensional GC Valve Front injector Back injector Sample tray Instrument In many cases you can move directly to the item of interest by pressing [Config][device]. When the Configure Device Display opens, the cursor should be on the Unconfigured field.

  • Page 142: General Topics

    Configuration General Topics To Unlock the GC Configuration Accessory devices including inlets, detectors, pressure controllers (AUX EPC and PCM), and temperature control loops (Thermal AUX) have electrical connections to a power source and/or the communication bus in the GC. These devices must be assigned GC resources before they can be used.

  • Page 143: Information Displays

    Configuration To consider an element's readiness, press [Config], then select the element. Scroll to Ignore Ready and press [Off/No] to set it to False. Information displays Below are some examples of configuration displays: [ EPC1 ] = (INLET) (SS) EPC #1 is used for an inlet of type split/splitless.

  • Page 144: Oven

    Configuration Oven “Unconfigured:” on page 143 and “Ignore Ready =” page 142. Maximum temperature Sets an upper limit to the oven temperature. Used to prevent accidental damage to columns. The range is 70 to 450 °C. See the column manufacturer’s recommendations.

  • Page 145: To Configure The Oven For Cryogenic Cooling

    Configuration To configure the oven Press [Config][Oven]. Scroll to Maximum temperature. Enter a value and press [Enter]. Scroll to Equilibration time. Enter a value and press [Enter]. Scroll to Cryo. Press [On/Yes] or [Off/No]. If On, enter the setpoints described in “To configure the oven for cryogenic cooling”...
  • Page 146 Configuration Cryo fault Shuts the oven down if it does not reach setpoint temperature after 16 minutes of continuous cryo operation. Note that this is the time to reach the setpoint, not the time to stabilize and become ready at the setpoint. For example, with a cool on- column inlet and cryo control in the oven track mode, it may take the oven 20 to 30 minutes to achieve readiness.

  • Page 147: Front Inlet/Back Inlet

    Configuration Front Inlet/Back Inlet “Unconfigured:” on page 143 and “Ignore Ready =” page 142. To configure the Gas type The GC needs to know what carrier gas is being used. Press [Config][Front Inlet] or [Config][Back Inlet]. Scroll to Gas type and press [Mode/Type]. Scroll to the gas you will use.
  • Page 148 Configuration If the inlet is to be cooled during a run, cryogen will be used to achieve the setpoint. This may have a negative impact on the chromatographic performance of the oven and cause distorted peaks. Cryo timeout Use this setting to conserve cryogenic fluid. If selected, the instrument shuts down the inlet and cryogenic (subambient) cooling (if installed) when no run starts in the number of minutes specified.

  • Page 149: To Configure The Mmi Coolant

    Configuration To configure the MMI coolant Press [Config][Front Inlet] or [Config][Back Inlet]. If the inlet has not been configured previously, a list of available coolants is displayed. Scroll to the desired coolant and press [Enter]. Cryo type/Cooling type [Mode/Type] displays a list of available coolants.
  • Page 150 Configuration feature. We recommend cryo timeout enabling to conserve coolant at the end of a sequence or if automation fails. A Post Sequence method could also be used. Cryo fault This parameter is available with N2 cryo and CO2 cryo Cryo types. Shuts down the inlet temperature if it does not reach setpoint in 16 minutes of continuous cryo operation.

  • Page 151: Column

    Configuration Column # Length The length, in meters, of a capillary column. Enter 0 for a packed column or if the length is not known. Diameter The inside diameter, in millimeters, of a capillary column. Enter 0 for a packed column. Film thickness The thickness, in microns, of the stationary phase for capillary columns.

  • Page 152: To Configure A Single Column

    Configuration To configure a single column You define a capillary column by entering its length, diameter, and film thickness. You then enter the device controlling the pressure at the Inlet (end of the column), the device controlling the pressure at the column Outlet, and the Thermal zone that controls its temperature.
  • Page 153 Configuration If you do not know the column dimensions—they are usually supplied with the column—or if you do not wish to use the GC calculating features, enter 0 for either Length or Diameter. The column will be not defined. Scroll to Inlet. Press [Mode/Type] to select a gas pressure control device for this end of the column.

  • Page 154: To View A Summary Of Column Connections

    Configuration You should check configurations for all columns to verify that they specify the correct pressure control device at each end. The GC uses this information to determine the flow path of the carrier gas. Only configure columns that are in current use in your GC’s carrier gas flow path.

  • Page 155: To Configure Multiple Columns

    Configuration To configure multiple columns To configure multiple columns, repeat the procedure above for each column. These are the available choices for Inlet, Outlet, and Thermal zone. Some will not appear on your GC if the specific hardware is not installed. Table 16 Choices for column configuration Inlet...
  • Page 156 Configuration Similar considerations apply for the column outlet end. When a column exits to a splitter, select the GC’s pressure control source attached to the same splitter. Table 18 Column outlet end If the column exhausts into Choose: A detector The detector.
  • Page 157 Configuration A simple example An analytical column is attached at its inlet end to a split/splitless inlet located at the front of the GC and the column outlet is attached to an FID located at the front detector position. Table 19 Analytical column Column Inlet...
  • Page 158 Configuration If other columns are currently defined, they may not use AUX 1, Front inlet, Front detector, or Back detector in their configuration. Complicated example The inlet feeds the analytical column which ends at a three- way splitter. The splitter has the column effluent and makeup gas coming in, and transfer lines (non- coated columns) to three different detectors.
  • Page 159 Configuration The flows to the three detectors are based on the pressure drops through the capillaries and their resistance to flow. An Agilent flow calculator provided with the capillary flow splitter device is used to size the length and diameter of these capillary sections to obtain the desired split ratios.

  • Page 160: Composite Columns

    Configuration Composite Columns A composite column is a capillary column that passes through multiple heating zones. A composite column consists of a main segment and one or more additional segments. There may be one segment on the input side of the main segment (In Segment) and up to two segments on its output side (Out Segment, Segment 2).

  • Page 161: To Configure Composite Columns

    Configuration To configure composite columns Follow steps 1- page 153. If using an In Segment, scroll to In_Segment Length and enter the length, in meters. If not using an In Segment, enter 0 to disable. If using an Out Segment, scroll to Out_Segment Length and enter the length, in meters.

  • Page 162: Ltm Columns

    Configuration LTM Columns “Unconfigured:” on page 143 and “Ignore Ready =” page 142. Low Thermal Mass (LTM) controllers and columns mount on the front door of the GC and connect to LVDS connectors [A- DET 1], [A- DET 2], or [EPC 6]. Press [Config][Aux Col #], enter the desired LTM column number [1-4], and configure as a composite column.

  • Page 163: Cryo Trap

    Configuration Cryo Trap This discussion assumes that the trap is mounted in position B, that you use liquid nitrogen coolant and control the trap with Thermal Aux 1. Configuration is in several parts: • Configure the trap to the GC •...
  • Page 164 Configuration Scroll to Cryo Type (Valve BV). If the value is not N2, press [Mode/Type], select N2 Cryo, press [Enter] and then [Clear]. This tells the GC what coolant will be used. Configure the user-configurable heater Many of the following steps tell you to reboot the GC. Ignore these requests by pressing [Clear].

  • Page 165: Front Detector/Back Detector/Aux Detector/Aux Detector 2

    Configuration Front Detector/Back Detector/Aux Detector/Aux Detector 2 Ignore Ready = “Unconfigured:” on page 143. To configure the makeup/reference gas The makeup gas line of your detector parameter list changes depending on your instrument configuration. If you have an inlet with the column not defined, the makeup flow is constant.

  • Page 166: To Ignore The Fid Or Fpd Ignitor

    Configuration heaters, select Install Detector 2 htr rather than the default Install Detector (FPD). This two heater configuration controls the detector body using the detector heated zone, and the transfer line using Thermal Aux 1 for a front detector or Thermal Aux 2 for a back detector.

  • Page 167: Analog Out 1/Analog Out 2

    Configuration Analog out 1/Analog out 2 Fast peaks The GC allows you to output analog data at two speeds. The faster speed—to be used only with the FID, FPD, and NPD—allows minimum peak widths of 0.004 minutes (8 Hz bandwidth), while the standard speed—which can be used with all detectors—...

  • Page 168: Valve Box

    Configuration Valve Box “Unconfigured:” on page 143 and “Ignore Ready =” page 142. The valve box mounts on top of the column oven. It may contain up to four valves mounted on heated blocks. Each block can accommodate two valves. Valve positions on the blocks are numbered.

  • Page 169: Thermal Aux

    Configuration Thermal Aux “Unconfigured:” on page 143 and “Ignore Ready =” page 142. The auxiliary thermal controllers provide up to three channels of temperature control. These controllers are labeled Thermal Aux 1, Thermal Aux 2, and Thermal Aux 3. To assign a GC power source to an Aux thermal zone Devices such as valve boxes and transfer lines have heaters which can be plugged into one of several connectors on the GC.

  • Page 170: To Configure A Msd Transfer Line Heater

    Configuration Scroll to Auxiliary type, press [Mode/Type], scroll to and select the desired device type, and press [Enter]. Types may include: • Cryo focus • Cryo trap • AED transfer line • Nickel catalyst • ICMPS argon preheat • ICMPS transfer line •...

  • Page 171: To Configure An Ion Trap Transfer Line Heater

    Configuration To configure an AED transfer line heater Check that a power source for the AED transfer line heater was assigned. See “To assign a GC power source to an Aux thermal zone” on page 169. Press [Config][Aux Temp #] and scroll to Thermal Aux 1, Thermal Aux 2, or Thermal Aux 3 depending on where the AED transfer line heater was assigned, and press [Enter].

  • Page 172: Pcm A/Pcm B/Pcm C

    Configuration PCM A/PCM B/PCM C “Unconfigured:” on page 143 and “Ignore Ready =” page 142. A pressure control module (PCM) provides two channels of gas control. Channel 1 is a simple forward- pressure regulator that maintains a constant pressure at its output. With a fixed downstream restrictor, it provides constant flow.
  • Page 173 Configuration This completes configuration for Channel 1. The rest of the entries refer to Channel 2. Scroll to Aux gas type, press [Mode/Type], make a selection and press [Enter]. Scroll to Aux Mode:, press [Mode/Type], select one of the following and press [Enter]: •...

  • Page 174: Pressure Aux 1,2,3/Pressure Aux 4,5,6/Pressure Aux

    Configuration Pressure aux 1,2,3/Pressure aux 4,5,6/Pressure aux 7,8,9 Ignore Ready = “Unconfigured:” on page 143. An auxiliary pressure controller provides three channels of forward- pressure regulation. Three modules can be installed for a total of nine channels. The numbering of the channels depends on where the controller is installed.

  • Page 175: Status

    Configuration Status The [Status] key has two tables associated with it. You switch between them by pressing the key. The Ready/Not Ready status table This table lists parameters that are Not Ready or gives you a Ready for Injection display. If there are any faults, warnings, or method mismatches present, they are displayed here.

  • Page 176: Time

    Configuration Time Press [Time] to open this function. The first line always displays the current date and time, and the last line always displays a stopwatch. The two middle lines vary: Between runs Show last and next (calculated) run times. During a run Show time elapsed and time remaining in the run.

  • Page 177: Valve

    Configuration Valve # Up to 4 valves can be mounted in a temperature- controlled valve box and are normally wired to the valve box bracket V1 through V4 plugs, located inside the electrical compartment. Additional valves or other devices (4 through 8) can be wired using the plug labeled EVENT on the back of the GC.

  • Page 178: Front Injector/Back Injector

    Configuration Front injector/Back injector The GC supports three models of samplers. For the 7693A and 7650A samplers, the GC recognizes which injector is plugged into which connector, INJ1 or INJ2. No configuration is needed. To move an injector from one inlet to another requires no settings: the GC detects the injector position.
  • Page 179 Configuration A-A3, B-B3—Use solvent bottles A, A2, and A3 if injector uses solvent A washes and solvent bottles B, B2, and B3 if injector uses solvent B washes. The injector alternates between all bottles. To configure an injector (7683 ALS) This section applies to the 7683 ALS system.

  • Page 180: Sample Tray (7683 Als)

    Configuration Sample tray (7683 ALS) This section applies to the 7683 ALS system. To configure the 7693A sampler system, see the 7693A Installation, Operation, and Maintenance manual. Press [Config][Sample Tray]. If the vial gripper is touching vials either too high or too low for reliable pickup, scroll to Grip offset and press [Mode/Type] to select: •...

  • Page 181: Instrument

    Configuration Instrument Press [Config]. Scroll to Instrument and press [Enter]. Scroll to Serial #. Enter a serial number and press [Enter]. This function can only be done by Agilent service personnel. Scroll to Auto prep run. Press [On/Yes] to enable Auto prep run, [Off/No] to disable it.

  • Page 182: Using The Optional Barcode Reader

    Configuration Using the Optional Barcode Reader The optional G3494A USB Barcode Reader and G3494B RS- 232 Barcode Reader accessories provide an easy way to input configuration information when used with an Agilent data system. The G3494B accessory uses RS- 232 communication and connects to the BCR/RA port on the back of the GC.

  • Page 183: Installing The Barcode Reader

    Configuration Installing the barcode reader To install the G3494B RS-232 barcode reader Shut down the GC and turn it off. Connect the control cable from the barcode reader to the GC the BCR/RA port. Plug the barcode reader power cord into an appropriate outlet.

  • Page 184: To Scan Configuration Data Using The G3494A Usb Barcode Reader

    Configuration Table 22 Scannable configuration data Columns Liners Syringes Part No. Part Number Part Number Serial No. Lot Number Lot Number Scan the barcode for the entry. Scroll to the next line for the consumable item, then scan its barcode. After scanning all desired items, scroll to Enter to save, Clear to abort.
  • Page 185 Agilent 7890B Gas Chromatograph Operation Manual Options About Options Calibration Maintaining EPC calibration—inlets, detectors, PCM, and AUX Auto flow zero Auto zero septum purge Zero conditions Zero intervals To zero a specific flow or pressure sensor Column calibration Communication Configuring the IP address for the GC...

  • Page 186: Options

    Options About Options The [Options] key is used for a group of functions that are usually set on installation and seldom changed afterward. It accesses this menu: Calibration Communication Keyboard and Display Calibration Press [Calibration] to list the parameters that can be calibrated.

  • Page 187: Auto Flow Zero

    Options Pressure sensors All EPC control modules use pressure sensors. They must be zeroed individually. There is no automatic zero for pressure sensors. Auto flow zero A useful calibration option is Auto flow zero. When it is On, after the end of a run the GC shuts down the flow of gases to an inlet, waits for the flow to drop to zero, measures and stores the flow sensor output, and turns the gas back on.

  • Page 188: To Zero A Specific Flow Or Pressure Sensor

    Options Zero intervals Table 23 Flow and Pressure Sensor Zero Intervals Sensor type Module type Zero interval Flow Use Auto flow zero and/or Auto zero septum purge Pressure Inlets Packed columns Every 12 months Small capillary columns Every 12 months (id 0.32 mm or less) Large capillary columns At 3 months, at 6 months,...
  • Page 189 Options Before you can calibrate the column, make sure that: • You are using a capillary column • The column is defined • There are no oven ramps • The column gas source (usually the inlet) is On and non- zero Also note that column calibration fails if the calculated column length correction is >...
  • Page 190 Options Scroll to Length or Diameter and press [Enter]. The following choices appear: • Mode • Measured flow • Unretained peak Calculated length or Calculated diameter • • Not calibrated Scroll to Unretained peak and enter the actual elution time from the run performed above.
  • Page 191 Options • Unretained peak • Calculated length or Calculated diameter • Not calibrated Scroll to Measured flow and enter the corrected column flow rate (in mL/min) from the run performed above. When you press [Enter], the GC will estimate the column length or diameter based on the elution time input and will now use that data for all calculations.
  • Page 192 Options Scroll to Measured flow and enter the corrected column flow rate (in mL/min) from the run performed above. Scroll to Unretained peak and enter the actual elution time from the run performed above. When you press [Enter], the GC will estimate the column length or diameter based on the elution time input and will now use that data for all calculations.

  • Page 193: Communication

    Options Communication Configuring the IP address for the GC For network (LAN) operation, the GC needs an IP address. It can get this from a DHCP server, or it can be entered directly from the keyboard. In either case, see your LAN administrator.

  • Page 194: Keyboard And Display

    Options Keyboard and Display Press [Options] and scroll to Keyboard and Display. Press [Mode/Type]. The following parameters are turned on and off by pressing the [On/Yes] or [Off/No] keys. Keyboard lock These keys and functions are operational when the keyboard lock is On: [Start], [Stop], and [Prep Run] [Load][Method] and [Load][Seq] [Seq]—to edit existing sequences...
  • Page 195 Options Radix type Determines the numeric separator type—1.00 or 1,00 Display saver If On, dims the display after a period of inactivity. If Off, disabled. Operation Manual...
  • Page 196 Options Operation Manual...

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