Thermo Scientific TRACE GC Ultra Maintenance And Troubleshooting Manual page 377

Replace the Silver Seal (NPD on ECD)
8. Disconnect the signal and ignition polarization
cables from the NPD.
9. Disconnect the signal, excitation and heater
cables from the ECD detector
10. Loosen the nut that fixes the ECD detector to its
base body with the proper tool contained in the
standard outfit and remove the detectors from
the ECD base body.
Maintenance and Troubleshooting Manual
Maintaining Detectors in Stack Configuration
Chapter 17
377