19 of 24
Jun 2001
Detectors
Agilent 6890 Gas Chromatograph Service Manual
Electron Capture Detector (ECD) 340
Diagnostics
7. Check for pressure drop:
• If the pressure stays stable or drops only 0.5 psi, you can consider
the ECD leak-free.
• If the pressure drops more than 0.5 psi, you have a leak.
If you are sure none of the upstream flow system components are
leaking, check for leaks at the column fitting and plugged inlet. If
you find leaks, tighten the fittings and repeat the leak test.
Note If you can find no other leaks, the ECD itself is probably leaking. The ECD
cannot be disassembled without special license from the Nuclear Regulatory
Commission or Agreement State Licensing Agency (USA only).
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