Hitachi S-4800 manual Application of High Voltage

3.3.4Application of High Voltage

When the HV Display are is blinking with yellow and blue color, click the ON button on the control panel at the left of the HV Display area. Accelerating voltage (Vacc) and extracting voltage (Vext) are then applied with the emission current values indicated in the HV display area.

The gun airlock - valve is opened automatically.

The ON button is changed to read SET when the high voltage is applied. You can set emission current to a selected value in the Set Ie to box by clicking this button.

The OFF button shuts high voltage.

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