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Manual 19“ HVPS-HC Module
19“ HVPS-HC Module R012 Manual | Surface Concept GmbH
This effect occurs independent on using an external HV module or using the second HV channel of the
R012.
This “pulling up” effect can be minimized by installing an addition resistance to ground on the HV output
of the reference HV module, to create an additional current flow out of the reference HV module. The value
of the resistance depends on the necessary current flow, which should be larger than the current flow out
of the floating HV module (a typical resistance values for the floating operation of MCP based detectors is
10MOhms).
External resistances in a compact housing with SHV connectors are available from Surface Concept to
connect in between the HV line of the reference HV module.
The connection scheme of the 19” HVPS-HC Module R012 in floating operation with such external resistance
is given in Figure 8.
Figure 8: Connection example for the floating operation of HV
channel 2 with positive polarity in reference to the negative
output of HV channel 1 with an external resistance to ground
connected to minimise the “pulling up” effect.
