PSI System Controls and Diagnostics
F3200E User Manual
F3200E_UM_180726 Page 24 of 107
i
Current source
(beamline with
(Faraday cup)
Ion source
-
+
Multiway cable
F3200E
AGND
Chassis
PS
HV supply
Figure 4. Circuit for measured current using an external power supply
In the case of an ionization chamber or similar device, where the F3200E is providing the bias to
the chamber, the return path is through the F3200E HV supply (figure 5) to complete the circuit
back to the biased electrode. If the supply is not enabled, then it appears as an impedance of
approximately 0.3V kohm, where V is the rating of the supply.
-
+
Bias
PSU
Multiway cable
i
F3200E
Current source
(ionization chamber)
AGND
Chassis
PS
Figure 5. Circuit for measured current using the F3200E HV supply
