NF HVA4321, Инструкция по эксплуатации

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8.6 Protection circuit
HVA4321
8-7
8.6 Protection circuit
Limit of output voltage (VOLTAGE LIMITER)
With the digital switch, the maximum output voltage may be independently set for positive and
negative.
This is available in both constant voltage mode and constant current mode. However, the set
values are approximate values.
Adjustment range
Positive: Set b5 kV and +10 kV with increments of 1 kV, or no limit
Negative: Set between -5 kV and -10 kV with increments of 1 kV, or no limit
Limit of output current (DC CURRENT LIMITER)
The maximum output current (DC and AC average values) may be set continuously with the
regulator.
This is available in both constant voltage mode and constant current mode. However, the set
values are approximate values.
If the current exceeds the set value, to limit the output current at the set value or to turn OFF the
output may be selected with the switch.
Adjustment range: Continuous variation from 0 to ±10 mA (Same value setting for positive and
negative)
8.7 Others
Signal ON/OFF (SIGNAL ON/OFF)
When the SIGNAL switch (or with remote control input) is OFF, the command value for the high
voltage amplifier is set to 0V and 0A.
The output circuit and the output terminal of the high voltage amplifier are not disconnected
electrically. Since the output circuit and the output terminal of the high voltage amplifier
remain connected, to change load or wiring, turn OFF the internal high voltage DC power
supply and the power of the unit before work.
Internal high voltage DC power supply ON/OFF switch (HIGH VOLTAGE POWER SUPPLY
ON/OFF)
This switch turns ON/OFF the output of the internal high voltage DC power supply. The output
status of the internal high voltage DC power supply is indicated by LED.
High voltage output lamp
During high voltage output, the LED around the output connector rotates and blinks.
The rotation speed varies according to the output voltage. The LED color is orange for approx. 4.9
kVpk or less and red for approx. 4.9 kVpk or more.
Adjustment of step response waveform (RESPONSE CV RESPONSE CC)
The step response characteristics may be independently adjusted in constant voltage mode and
constant current mode. A semi-fixed regulator is used for adjustment.The adjustment range varies
depending on the load condition. In cases, oscillation may occur.