Difficulty with the HED supply

Large peak such as the solvent peak eluted while the analyzer was on

Make sure the solvent delay is long enough so the analyzer does not turn on until the solvent peak has eluted.

Vacuum manifold pressure is too high

HED high voltage lead is shorted to ground

1. Vent the MSD.

2. Open the vacuum manifold.

3. Check the HED high voltage lead. Make sure it is connected. Make sure it is not shorted to a grounded surface.

See the MSD maintenance documentation for instructions for venting the MSD and opening the vacuum manifold.

Detector is not working correctly

Contact your Agilent Technologies service representative.

MSD electronics are not working correctly

Contact your Agilent Technologies service representative.