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Detector Systems
Electron capture detector (ECD)
142
A very clean system may produce a value below the low end of 10 (100
Hz). To correct this condition, an adjustment is made to the present
potentiometer located on the ECD electronics board.
ECD Potentiometer Switch and Adjustment
ECD Potentiometer SwitchUp: Adj
Down: Fixed
ECD Potentiometer Adjustment
1. Remove the right side of the panel.
2. Flip the switch up to the Adj. position.
3. Using a small screwdriver, turn the potentiometer clockwise until the
background level is at or slightly above 20 (200 Hz, low reading for
trace analysis).
4. Replace the right side of the panel.