Agilent Technologies G1289 User Manual

Entering a Method
Chaining Methods
65
The method stored in the specified location is now available for current use.
Note A method may not be loaded during a run.
Chaining Methods
Chain Methods allows two to four stored methods to be used sequentially to
run groups of samples. It provides the user with some automation. Once the
chain (or sequence) is programmed in and the samples loaded, the sampler will
run the sequence without further operator intervention. Method chaining is
also a means of performing multiple headspace extraction (MHE).
Activate a Method Chain
To activate a method chain:
1. Press Chain Methods. The display reads as follows:
METH #’s
2. Press a method number {1-4}. A flashing * appears on the display followed
by the method number chosen.
3. Key in the method sequence in the order to be run.
4. Press Enter. The following flashing message is displayed:
METH CHAIN ON
Methods are run in order from left to right on the display. For example, keying
in the following:
2 4 1 3 Enter
would have the sampler run method two, followed by method four, then
methods one and three.
Press Chain Methods again to display the current chain sequence. This
method sequence is active until you edit it or press Load Method.

Agilent Technologies G1289 Specifications

General

Brand	Agilent Technologies
Model	G1289
Category	Laboratory Equipment
Language	English

Summary

About This Manual

Manual Overview

Provides an overview of the manual's structure, including chapters, glossary, and index.

Intended User

Identifies the target audience and their prerequisite knowledge for using the manual.

Introduction to Headspace and to the 7694 Headspace Sampler

Overview of Headspace Analysis

Explains the theory and application of headspace analysis for volatile compounds.

The 7694 Headspace Sampler

Details the instrument's key components, such as the Oven, Heated Zones, and Transfer Line.

Principles of Operation

Describes the sampler's operational sequence, diagnostics, and different analysis modes.

Modes of Operation

Explains standard and multiple headspace extraction techniques and their parameters.

The Keypad

Accessing Functions

Guide to using the instrument's keypad for navigating and changing settings.

Keys and Their Functions

Detailed explanations of the functions for each key on the sampler's keypad.

Zone Temps

Procedure for setting temperatures for the oven, loop, and transfer line.

Event Times

Instructions for setting timed events like GC Cycle Time and Vial Equilibration Time.

Using the Adv Fctn Key

Using an Advanced Function

Steps to access and modify nonroutine parameters using the Adv Fctn key.

List of Advanced Functions by Model

Reference tables for advanced functions available on G1883 and G1289/G1290 models.

Preparing a Sample

Sample Preparation

Instructions for filling, sealing, and preparing sample vials for analysis.

Loading the Sample Tray and/or Carousel

Procedure for loading prepared vials into the instrument's sample tray or carousel.

Entering a Method

Entering a Method

Guide to defining analysis methods by setting parameters via the keypad.

Storing and Loading Methods

Procedures for saving and retrieving analysis methods from memory.

Chaining Methods

Enables sequential execution of multiple methods for automated sample analysis.

Developing Methods

Varying Oven Temperature

Explains how oven temperature affects analyte concentration and analysis sensitivity.

Varying Event Times

Adjusting timing parameters like Vial Equilibration Time for optimal analysis results.

Optimizing Carrier Gas Flow

Guidance on setting carrier gas flow rate for efficient sample transfer and detection.

Maintaining the Instrument

Common Replacement Parts and Consumables

List of essential parts and consumables for instrument maintenance and operation.

Changing the Sampling Needle

Step-by-step guide for safely replacing the instrument's sampling needle.

Steam Cleaning the Pneumatic System

Method for cleaning the pneumatic system using steam to remove sample residues.

Leak Testing: General Information

Overview of gas flow paths and general procedures for leak testing the instrument.

Leak Testing a G1289 to 6890 GC Interface

Testing carrier gas flow path integrity between the GC and headspace sampler.

Troubleshooting

Chromatography Problems

Diagnosing and resolving issues related to peak appearance and data quality.

No Peaks

Troubleshooting steps for the absence of peaks in chromatograms.

Vial Handling Problems (G1289/G1290 only)

Resolving issues with vial pickup, loading, and movement by the robotic arm.

Mechanical/Electrical Problems

Diagnosing and fixing common mechanical and electrical issues.

Zones Won’t Heat

Troubleshooting steps when heating zones fail to reach or maintain temperature.

Error Messages

Error Message Listing

A comprehensive list of error messages and their probable causes and solutions.

ALARM TEMP Errors (OVEN, LOOP, TUBE)

Diagnosing temperature sensor failures or overheating in instrument zones.

Recovery from an Automation Error (G1289/G1290)

Procedures for recovering from automation errors, including loading default methods.