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Chapter 7Maintaining the InstrumentNotes for Database Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2Recommended Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4Section 7.1 Maintaining the <strong>7900HT</strong> Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5Replacing the Sample Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6Changing the Plate Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12Decontaminating the Sample Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14Performing a Background Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16Preparing the Background Plate or TaqMan Low Density Array . . . . . . . . . . . . . 7-17Creating a Plate Document for the Background Run . . . . . . . . . . . . . . . . . . . . . . 7-17Running the Prepared Background Plate or TaqMan Low Density Array . . . . . . 7-18Analyzing the Background Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-19Performing a Pure Dye Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-20Preparing the Pure Dye Plates or Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22Preparing a Plate Document for a Pure Dye Plate or Card . . . . . . . . . . . . . . . . . 7-22Running the Prepared Pure Dye Plate or Card . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-24Analyzing the Pure Dye Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25Adding Custom Dyes to the Pure Dye Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-27Verifying Instrument Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-30Section 7.2 Maintaining the Plate H<strong>and</strong>ler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-35Automation Accessory Components <strong>and</strong> Stack Positions . . . . . . . . . . . . . . . . . . . . . 7-36Adjusting the Sensitivity of the Plate Sensor Switch . . . . . . . . . . . . . . . . . . . . . . . . . 7-37Aligning the Plate H<strong>and</strong>ler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-41Aligning the Fixed-Position Bar Code Reader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-49Cleaning <strong>and</strong> Replacing Gripper Finger Pads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-52Section 7.3 Maintaining the Computer <strong>and</strong> Software . . . . . . . . . . . . . . . . . . . . . . . 7-53General Computer Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-54Maintaining the <strong>SDS</strong> software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-55Chapter 8TroubleshootingTroubleshooting Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2Low Precision or Irreproducibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5Background Runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9Pure Dye Runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11<strong>Real</strong>-<strong>Time</strong> Runs (Quantitative <strong>PCR</strong> <strong>and</strong> Dissociation Curves) . . . . . . . . . . . . . . . . . . 8-12End-Point Runs (Allelic Discrimination) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13Software <strong>and</strong> <strong>7900HT</strong> Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14Zymark Twister Microplate H<strong>and</strong>ler <strong>and</strong> Fixed-Position Bar Code Reader . . . . . . . . 8-17TaqMan Low Density Array . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18<strong>SDS</strong> Enterprise Database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-20<strong>Applied</strong> <strong>Biosystems</strong> <strong>7900HT</strong> <strong>Fast</strong> <strong>Real</strong>-<strong>Time</strong> <strong>PCR</strong> <strong>System</strong> <strong>and</strong> <strong>SDS</strong> Enterprise Database User GuideDRAFTSeptember 1, 2004 11:40 am, 4351684ATOC.fmvii

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