NF HVA4321, Инструкция по эксплуатации

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4.2 Operation example in constant current mode (total)
HVA4321
4-14
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4.2 Operation example in constant current mode (total)
This section describes operation example of this unit in total mode of constant current mode.
In constant current mode, the output current varies according to the input signal. If high frequency AC
signal is given at high voltage, leak current runs with stray capacitance between the cable and the ground.
Therefore, not all current from the output terminal of the unit goes to load.
In total mode, current including leak current due to cable capacity is controlled.
Set current = Leak c Load current
Effect of stray capacitance of the cable is found only for AC signal output. Effect of stray signal is not
found for DC signal.
The TOTAL terminal of OUTPUT Lo is connected to the casing (= ground). Therefore, the total mode can
be used for grounded load or load that can be grounded.
When the internal high voltage DC power supply is ON and SIGNAL is ON with the output open,
maximum ±12 kV output is given to the OUTPUT Hi terminal. It is very dangerous.
Do not turn ON SIGNAL when the output is open.
In constant current mode, be sure to connect load or short-circuit the output.
When the internal high voltage DC power supply is ON and SIGNAL is OFF with the output open, ±100V
voltage output may be given to the OUTPUT Hi terminal depending on the voltage limiter settings.
In constant current mode, DC cannot be run for capacity load. At this time, the output for DC signal is the
same as that in open status. When SIGNAL is ON, maximum ±12 kV output is given to the OUTPUT Hi
terminal.
Never apply DC to capacity load in constant current mode.
WARNING
WARNING