Routine Maintenance: Detectors
Maintaining a Microcell Electron Capture Detector (µECD)
Released: March 2004 6850 Series II GC User Information page 203 of 256
6. One part at a time, check the rest of the GC system for contamination by
making the following changes and monitoring the output:
• Replace the column with an empty column and compare the output
readings.
• Switch to a different inlet (if possible), and compare the output.
• Switch to a different source of gas and compare the output.
• Replace the traps; compare the output.
Replacing the µECD flow module
Tools and materials
• 7/16-inch wrench
• T-20 Torx driver
To remove the flow module
Warning Be careful! The oven and/or detector may be hot enough to cause burns.
1. Load the SERVICE method or reset the detector and oven temperatures to
OFF or turn the main power switch off. Let the heated zones cool to room
temperature.
2. Turn the detector pressure off at the source.
3. Turn off the instrument and remove the power cord.
4. Turn off all supply gases at their sources.
5. Disconnect all gases from the bulkhead connectors on the back of the
instrument.
6. Remove the lid top cover to expose the flow module.
Caution Use electrostatic discharge precautions during this procedure.
7. Remove the gas fitting from the flow module (Figure 35).
To Next Page
Loading...
