DEI PCX-7500 Operation Manual

Pulsed current source

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PCX-7500
Pulsed Current Source
Operation Manual
Directed Energy, Inc.
1609 Oakridge Dr., Suite 100, Fort Collins, CO 80525
(970) 493-1901
sales@ixyscolorado.com
www.ixyscolorado.com
 

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  • Page 1 PCX-7500 Pulsed Current Source Operation Manual Directed Energy, Inc. 1609 Oakridge Dr., Suite 100, Fort Collins, CO 80525 (970) 493-1901 sales@ixyscolorado.com www.ixyscolorado.com  ...
  • Page 2: Table Of Contents

    Contents Contents  ................................ 2  Safety ................................ 4  Safe Operating Area  ............................ 5  Introduction .............................. 12    Description ............................ 12    Front Panel Features  ........................ 13    Rear Panel Features ........................ 14    Accessories Included  ........................ 16  Interfacing the Load to the Output Cable  .................... 17  Quick Start Guide ............................ 19    Safety .............................. 19    Requirements  .......................... 19    Controlling the PCX‐7500 from the Front Panel ................ 19    Controlling the PCX‐7500 from a Computer ................... 20  Operation .............................. 21    Setup ............................... 21    Power Up  ............................ 21   ...
  • Page 3   Recalling the Settings  ........................ 27    Power Down  ............................ 27  Command Set  .............................. 28  Warranty and Service  .......................... 33    Warranty ............................ 33    Factory Service and Support ...................... 34         ...
  • Page 4: Safety

    • Always refer to the safe operating section of the manual for your model of the PCX-7500 system. • Do not open the cover of the PCX-7500. There are no user-serviceable parts inside. Opening the cover exposes you to shock and voids the factory warranty.
  • Page 5: Safe Operating Area

    Safe Operating Area This section contains Safe Operating Area (SOA) graphs for all PCX-7500 models. In each graph, the Safe Operating Area consists of the green and yellow shaded areas. IMPORTANT: Do not operate the instrument outside of the Safe Operating Area! Although the PCX-7500’s internal and external triggering system allow it to operate...
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  • Page 12: Introduction

    100 ns, measured from rising edge to rising edge. The PCX-7500 has the ability to store four unique user settings, which include all system configurations for operation of the PCX-7500.
  • Page 13: Front Panel Features

    The touch screen provides a graphical user interface and touch control to adjust all functions of the PCX-7500. Encoder Knob Turn the encoder knob to change a value for functions of the PCX-7500. Push it to cycle through the resolutions (increments of value change). Local Button Mode Pressing the LOCAL button returns the PCX-7500 to front panel control from computer control.
  • Page 14: Rear Panel Features

    The sync pulse corresponds to the leading edge of the output current pulse. Keyswitch The keyswitch ON position allows the PCX-7500 output current to be enabled. In the keyswitch OFF position, the PCX-7500 is disabled. Rear Panel Features  ...
  • Page 15 Use this connector to communicate with an external computer via a RS-232 cable. Power Cord Connector The power cord connector accepts type IEC 320 C-19 to NEMA 5-20P grounding equipment power cord. On-Off Power Switch This switches powers the PCX-7500 on and off.        ...
  • Page 16: Accessories Included

    This factory-supplied cable provides output current pulses to external devices. A DB-37 male connector fits the socket on the rear panel of the PCX-7500; a DB-37 female connector is on the user end. Shorting BNC Plug The shorting BNC plug attaches to the Rear Enable BNC connector on the rear panel.
  • Page 17: Interfacing The Load To The Output Cable

    The two photos on the next page show an interface board created for a laser used in the DEI lab. The top of the interface board has solid copper from the stripline to the laser’s positive terminal. The bottom of the interface board has solid copper plane everywhere the positive plane is, plus additional copper to connect to the negative side of the laser.
  • Page 18 BOTTOM Why are we trying so hard to reduce resistance? Resistance in the output path turns electrical energy into unnecessary heat. Designers spend a lot time and effort removing as much heat as possible from their systems, thus resistance is an unwanted parameter. Why are we trying so hard to reduce inductance? Inductance in the output path can cause voltage overshoot on the rising and falling edges of the output pulse.
  • Page 19: Quick Start Guide

    Controlling the PCX-7500 from the front panel 1. Disable the PCX-7500 The Enable button on the front panel glows green if the PCX-7500 is enabled. Press the button to disable. The green light goes out. 2. Set the output current Press the Output button on the touch screen.
  • Page 20: Controlling The Pcx-7500 From A Computer

      500 Hz to 10000 Hz  6. Enable the PCX-7500 Press the Enable button on the front panel. The button lights green. Controlling the PCX-7500 from a computer 1. Disable the PCX-7500 Send the command “OUTPUT:DISABLE”. 2. Set the trigger to internal or external Send the command “TRIG:INTERNAL”...
  • Page 21: Operation

    NOTE: Any change to a command adjustment typically requires less than 200 ms to complete. 1. Make sure the PCX-7500 has been OFF for at least ten minutes when connecting or disconnecting the current output connector. 2. Make sure the laser diode is connected with the correct polarity. If necessary, review the output cable for polarity specifications.
  • Page 22: Home Help Screen

    Home Help Screen 1. On the Home screen, press the “?” (question mark) icon. 2. The Help screen appears. This screen describes the icons used in the PCX-7500. Set the Output Current SETPOINT:CURRENT:? SETPOINT:CURRENT: n (in A) 1. On the Home screen, press the Output button.
  • Page 23 b. For External Trigger Termination screen appears. Set the Termination if necessary. Set the Frequency TRIG:INT:FREQ? TRIG:INT:FREQ n 1. From the Home screen, press the Frequency icon. The Set Frequency screen appears. 2. Press the encoder knob to change the resolution to x1, x10, x100, x500, x1000, or x5000: Frequency ...
  • Page 24: Settings Menu

    2. The Settings screen appears. This screen allows the user to view the system settings and change settings as necessary. View Information About the PCX-7500 *IDN? 1. On the Home screen, press the Tools icon. The Settings screen appears. 2. Press the About icon. The About screen appears.
  • Page 25 3. To view the communication help screen, press the ? (question mark) icon. 4. Press the X to return to the PCX-7500 COM screen. 5. Press the icon for the desired communication port. a. If RS232 is selected, change the baud rate to appropriate setting.
  • Page 26 Press the IP box to set the IP address, Address Config screen appears. Press each field setting and use the encoder knob to change settings. Press the Save and Exit icon. Press the Gateway box to set the Gateway; the Gateway Configuration screen appears.
  • Page 27: Power Down

    Save Settings *SAVE n 1. On the Home screen, press the Tools icon. The Settings screen appears. 2. Press the Save Settings icon. The Save screen appears. 3. Press the icon for one of the four locations to which you want to save the settings. NOTE: Saving to a location overwrites any data at that location.
  • Page 28: Command Set

    The responses to the user’s computer are also terminated with “\n”. For every command sent to the PCX-7500, a response will be sent back to the user from the PCX-7500. The user’s software must wait for a response before sending another command to avoid an overflow of the PCX-7500 receive buffer.
  • Page 29 *IDN? DEI Scientific, PCX-7500-110, 7500-121131, Q01C01T01P01, 11-25-2012 *SAVE n Saves the current configuration to non-volatile memory. The value of n must be between 1 and 5. Example: *SAVE 3 *SAVE 3 *RECALL n Recalls saved configurations. The value of n must be between 1 and 5. Example:...
  • Page 30 Returns the pulse width of the output pulse in nanoseconds. Example: TRIG:INT:PULSEWIDTH? 4000 nsec TRIG:INT:PULSEWIDTH nnnn Sets the pulse width of the output pulse in nanoseconds. The value of nnnn must have two decimal places and be from 4µS to 5mS. Example: TRIG:INT:PULSEWIDTH 5500 5500 nsec Frequency...
  • Page 31 24V error internal 24V is outside of normal range Cap voltage error < NOT USED > over current error Either the PCX-7500 or the load failed. Contact DEI 128: Under_Current_Error < NOT USED > 256: Power_Up_Error <...
  • Page 32 STATUS:KEYSWITCH? ENABLED STATUS:REAR:ENABLE? Returns the state of the rear enable connector, (Enabled or Disabled). Example: STATUS:REAR:ENABLE? ENABLED  ...
  • Page 33: Warranty And Service

    DEI’s sole obligation, and buyer’s sole remedies, under this agreement shall be limited to a refund of the purchase price, or at DEI’s sole discretion, to the repair or replacement of products in kind that prove, to DEI’s satisfaction, to be defective, when returned to the DEI factory, transportation prepaid by the buyer, within the warranty period.
  • Page 34: Factory Service And Support

    Factory Service and Support For more information about your instrument or for an operation problem, please contact the factory: Directed Energy, Inc. 1609 Oakridge Dr., Suite 100 Fort Collins, Colorado 80525 (970) 493-1901, ext. 24 sales@ixyscolorado.com techsupport@ixyscolorado.com http://ixyscolorado.com/  ...
  • Page 35     escription:     Equipment D 50 Amp Current t Source Equipment M Model Designation PCX-7500 Application of f Council Directiv ve: 73/23/EEC o on the harmoniza ation of the laws related to Memb ber States relating to ele...
  • Page 36 Notes        ...

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