DEI PVX-4000-2kV User manual

PVX-4000-2kV
Pulsed Voltage Source
Operation Manual
Directed Energy, Inc.
1609 Oakridge Dr., Suite 100, Fort Collins, CO 80525
[phone]
Manual Document 7650-0022 Rev. A05
© Copyright 2017 IXYS Colorado. All rights reserved.
SI Scientific Instruments GmbH ... the better technology
Roemerstr. 67 | 82205 Gilching/Germany | Phone: [phone] | E-mail: [email protected] | Web: www.si-gmbh.de

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Contents
Contents........................................................................................................................................................3
Safety............................................................................................................................................................5
Introduction..................................................................................................................................................6
Description........................................................................................................................................6
FrontPanelFeatures.........................................................................................................................7
RearPanelFeatures..........................................................................................................................9
AccessoriesIncluded.......................................................................................................................10
OperatingConsiderations...........................................................................................................................11
OutputCabling................................................................................................................................11
PulseVoltages.................................................................................................................................11
TriggerMethod...............................................................................................................................11
LocalOperation...........................................................................................................................................12
LocalMode......................................................................................................................................12
Setup...............................................................................................................................................12
PowerUp.........................................................................................................................................12
SettheOutputVoltage...................................................................................................................13
SettheTriggerType........................................................................................................................13
SettheFrequency...........................................................................................................................13
SetthePulseWidth.........................................................................................................................14
EnableSystemOutput....................................................................................................................14
PowerDown....................................................................................................................................15
SaveSystemSetup..........................................................................................................................15
RestoreSystemSetup.....................................................................................................................15
RemoteOperation......................................................................................................................................16
RemoteMode.................................................................................................................................16
CommandList.................................................................................................................................17

FaultCodes......................................................................................................................................19
WarrantyandService..................................................................................................................................20
Warranty.........................................................................................................................................20
FactoryServiceandSupport...........................................................................................................21
DeclarationofConformity..........................................................................................................................22

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Safety
Always refer to the Safe Operating Area (SOA) of the PVX-4000-2kV system,
located in the datasheet.
Do not open the cover of the PVX-4000-2kV. There are no user-serviceable parts
inside. Opening the cover exposes you to shock and voids the factory warranty.
Do not install, handle, or remove the output cables or load while the PVX-4000-
2kV is operating. Allow at least 10 minutes after powering down before handling
the output cable or load.
Do not use this device in a manner not specified by the manufacturer.
Allow sufficient space around this device for air circulation.
Do not use where liquids are present or in corrosive environments. Clean this
instrument by wiping with a dry or damp cloth.
WARNING
Risk of lethal electric shock. Do not open the cabinet of this device. Do not touch
the output or load while it is operating. This device produces LETHAL levels of
electric current, both inside its cabinet and at its output.
DO NOT OPERATE THIS DEVICE UNLESS ANOTHER PERSON, CAPABLE OF
RENDERING FIRST AID OR RESUSCITATION, IS PRESENT.
SAFE AND PROPER OPERATION OF THIS DEVICE IS THE RESPONSIBILITY OF
THE USER.
Directed Energy, Inc. (DEI) provides information on its products and associated hazards,
but it assumes no responsibility for the after-sale operation and safety practices.

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Introduction
Description
The PVX-4000-2kV is an air-cooled pulse generator that produces high voltage
waveforms. Optimized for high-impedance capacitive loads, the PVX-4000-2kV is well
suited for driving extraction grids and deflection plates for electrostatic modulation of
particle beams in time-of-flight mass spectrometers and accelerators. The output
voltage can be set to ±2000 V using the internal high voltage power supplies.
ThepositiveandnegativehighvoltageoutputlevelsmustNOTexceed2000Vtotal.
Reducethehighvoltageoneitherchanneltoachieve≤2000V.Usethebelowformula:
Vpositive+|Vnegative|≤2000V
The system is capable of duty cycles from 2% to 98% and repetition rates from 40 Hz
to 30,000 Hz using the internal trigger. With the external trigger the system is capable
of single shot to 600 kHz with a pulse width of 500 ns to 100% duty cycle.
Conveniently-located front panel BNC connectors allow the PVX-4000-2kV to be
externally gated and synchronized for specialized interconnected equipment
applications. The external gate input impedance and the sync output impedance are
both 50 . The sync output pulse is synchronized to the leading edge of the output
voltage pulse and is active with the external trigger.
The PVX-4000-2kV includes a pulse generator and high voltage DC power supplies,
providing you with a standalone test system that can be programmed to perform
device testing using the front panel LCD controls or a computer interface (RS-232 and
USB).
When changing the frequency, the duty cycle will be maintained. The system will
display the new pulse width that changes to maintain the duty cycle. It is
recommended to change the frequency before changing the pulse width.
Up to five user configurations may be stored in internal nonvolatile memory and
recalled through the front panel or communications interface. The first memory
location stores the power-up default parameters.
All error and fault messages are reported on the front panel display and are also
available via the computer communications interface. Analog voltage monitors are
also provided for monitoring the voltage to the load using an external oscilloscope.

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Front Panel Features
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Power LED
The Power LED is lit when there is support power applied to the PVX-4000-2kV.
Fault LED
The Fault LED is lit when there is a fault/error sensed within the system.
Enable LED
The Enable LED is lit, and the system output is enabled, when all the following
conditions are met:
There are no faults
The enable BNC connection is made
The enable button has been pressed
Enable Button
The Enable button, press this button to enable and disable the system output.
Home Button
The Home button, press this button to return to the main menu, once all parameters
have been set to the user values.
Encoder Knob
The encoder changes the values of the displayed parameters.
LED Display
The display shows system information on the home screen. It is used in conjunction
with the encoder.

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Enable Input
The Enable BNC input accepts either an external dry-contact closure or the factory-
supplied shorting BNC plug (PCA-9410).
Closed contacts or use of the shorting plug allows the output to be enabled.
Less than 1000 will allow the system to be enabled.
Open contacts or removal of the shorting plug disables the output and creates
a fault. Greater than 1 Mwill disable the system.
Voltage Monitor Output
The Voltage Monitor (VMON) BNC output allows the user to monitor the voltage and
signal of the output cable. The VMON voltage is linearly scaled with a ratio of 10:1000.
For example, 1000 V at the output corresponds to 10 V on VMON.The oscilloscope
termination should be set to 1 M.
Gate Input
The Gate (external gate) BNC input accepts trigger pulses from an external source.
Its input impedance is 50 and should be driven with a 5 V logic level source. The
frequency range is single shot to 100 kHz and the pulse width is 500 ns to DC.
Sync Output
The Sync BNC output provides synchronization pulses for external devices. The
sync pulse corresponds to the leading edge of the output pulse. Its impedance is 50
with voltage levels of 0 V to > +3.3 V. Sync Output Voltage Levels:
0 V output = - HV output pulse
< +3.3 V output = + HV output pulse
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Rear Panel Features
Output
The voltage output connector, a Winchester Kings 10 kV, 1065-2 plug, is the output
connection for system-generated voltage pulses. DO NOT TOUCH any part of this
output or cable while the PVX-4000-2kV is powered up and enabled. Please review
the Safety section.
Power Cord Connector
The power cord connector accepts a type NEMA C14 grounding equipment power
cord.
On/Off Power Switch
The On/Off switch turns the PVX-4000-2kV support power on and off.
Communication
The system can communicate with a computer using USB or RS-232 for automated
program operation.
The RS-232 Interface operates with settings of 115,200 baud, 8 data bits, 1
stop bit, no parity, and no flow control.
The USB Interface operates as a COM port with settings of 115,200 baud, 8
data bits, 1 stop bit, no parity, and no flow control. The driver can be found on
our website.
When switching communication from RS-232 to USB, no power cycle is
needed.
When switching communication from USB to RS-232, you must power cycle
the PVX-4000-2kV.

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Accessories Included
AC Power Cord
The factory-supplied power cord is a type NEMA C14 grounding equipment power
cord.
Pulsed Output Cable
The output cable (PCA-9400) is used to connect the PVX-4000-2kV to the load and is
two meters in length. The factory supplied output cable has 1.57 pF / 1.0 cm of cable.
This needs to be calculated into the total load value.