How do I fix poor sensitivity (EI or CI source) in Waters GCT Premier?
To address poor sensitivity (EI or CI source) in your Waters Laboratory Equipment, replace or reposition the filament. Clean the inner source and the collimating slits.
What causes excessive leakage current (in FI source) in Waters GCT Premier?
If you observe excessive leakage current (in FI source) in your Waters Laboratory Equipment, inspect the source and move the wires if internal source wiring is touching grounded elements. If high leakage current continues, strip and clean the source if required. If there is leakage between the extraction rods and the emitter, withdraw the emitter by 5 to 10 mm from the extraction rods. Remove the ion source, and clean the extraction rods.
Why is there no Beam or Emitter current (in FI source) in my Waters GCT Premier?
If there is no Beam or Emitter current (in FI source) in your Waters Laboratory Equipment, determine whether the position of the emitter is correct by adjusting the knob on the emitter probe. Ensure the extraction voltage read-back is present and the leakage current is less than 10 mA. Visually inspect the emitter wire to ensure that the emitter is not damaged. Check the emitter current readbacks match the set values. Replace the emitter if required or check continually with a multimeter.
General| Software | MassLynx |
|---|---|
| Resolution | 10, 000 FWHM |
| Ionization Modes | EI, CI |
| Mass Accuracy | <5 ppm |
| Dynamic Range | >4 orders of magnitude |
Provides instructions for removing and installing the EI/CI inner source assembly.
Details the procedure for removing and fitting the EI/CI outer source assembly.
Outlines steps to prepare the instrument for operation and tuning.
Describes the process of obtaining an ion beam for instrument tuning.
Guides through automatic instrument setup using the Instrument Setup Wizard.
Explains how to tune the instrument for Electron Ionization (EI) mode.
Details procedures to achieve the best resolution in EI mode.
Explains how to tune the instrument for positive Chemical Ionization (CI).
Guides on tuning the instrument for negative Chemical Ionization (CI).
Outlines the process of calibrating the instrument's mass scale.
Guides through the instrument calibration process using a wizard.
Explains how to calibrate the instrument in Chemical Ionization (CI) mode.
Provides instructions for manual instrument calibration procedures.
Provides step-by-step instructions for installing the GC interface.
Details tasks for loading, inserting, and removing the DI probe.
Explains how to control the DI probe temperature manually and automatically.
Guides on installing the probe insertion lock for the DCI probe.
Details tasks for loading, inserting, and removing the DCI probe.
Explains how to manually control the DCI probe current.
Guides on setting up the instrument for FI/FD operation.
Explains how to tune the instrument in Field Ionization (FI) mode.
Guides on setting up and calibrating the instrument for FI operation.
Explains how to tune the instrument in Field Desorption (FD) mode.
Lists periodic maintenance schedules and safety precautions.
Discusses rotary pump oil quality, color, gas ballast, and maintenance.
Covers cleaning and maintenance of EI/CI inner source components.
Details maintenance procedures for FI/FD inner source, including emitter care.
Covers cleaning and maintenance of EI/CI outer source components.
Details maintenance procedures for FI/FD outer source components.
Guides on checking for leaks after performing source maintenance.
Covers maintenance procedures for the detector, including conditioning.
Provides tables of common hardware problems and corrective actions.
Gives information on how to contact Waters for technical support.
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