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HAPSITE ER Operating Manual
Mass Alignment
Perform a Mass Alignment by pressing F5. This will update the Status column
readings. Perform a Mass Alignment prior to and after making adjustments to the
tune parameters. (See Figure 9-21.)
Figure 9-21 Mass Alignment
Adjusting EM Voltage
The BPG is adjusted using EM (Electron Multiplier) voltage. Adjustments are made
using increments of 25 V. (See Figure 9-22.) The normal operating range is 1000
to 1600 V, with newer units typically showing lower values and older units showing
higher values. If your unit requires an EM volt of 1600 to 2000 to reach BPG of 0.5,
please contact INFICON for support, as your unit may require service.
Figure 9-22 Adjusting EM Voltage
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