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DEI PCX-7420 Operation Manual Download Page 4

 

Page 

4

 of 

32

 

For more information:

  970.493.1901 or 

[email protected] 

Document #7650-0004 Rev C2. © Copyright 2019 Directed Energy, Inc. All rights reserved. 

Safety

 

 

 

 

 

 

 

•  Do not open the cover of PCX-7420. There are no user-serviceable parts inside. 

Opening the cover exposes you to lethal shock and voids the factory warranty. 

•  Do not install, handle, or remove the output cable or laser diode while the  PCX-

7420 is operating. 

•  The  PCX-7420  can  be  triggered  randomly  by  spurious  transients.  Always 

assume it is possible to get an unexpected pulse at the output. 

•  Allow at least 10 minutes after power-down before handling the output cable 

or laser diode. 

•  Do not use this device in a manner not specified by the manufacturer. 

•  Allow sufficient space around this device for air circulation. Cooling air  enters 

the front of the chassis and exits the back of the chassis. 

•  Take  normal  precautions  to  protect  this  device  against  liquid  entry  or 

corrosive environments. 

•  Clean this device 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 laser diode 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. 

Summary of Contents for PCX-7420

Page 1: ...ce Operation Manual Directed Energy Inc 1609 Oakridge Dr Suite 100 Fort Collins CO 80525 970 493 1901 sales directedenergy com www directedenergy com Document 7650 0004 Rev C2 Copyright 2019 Directed Energy Inc All rights reserved ...

Page 2: ......

Page 3: ...tures 10 Accessories Included 11 Operation 13 Setup 13 Power Up 13 Set the Output Current 14 Set the Bias Current 14 Set the Pulse Width 15 Set the Bias Width 15 Set the Trigger 16 Set the Frequency 17 View Information About the PCX 7420 17 Save Settings 18 Recall Settings 19 Warnings and Faults 20 View the Communication Settings 22 Power Down 23 Command Set 24 Warranty and Service 30 Factory Serv...

Page 4: ... the manufacturer Allow sufficient space around this device for air circulation Cooling air enters the front of the chassis and exits the back of the chassis Take normal precautions to protect this device against liquid entry or corrosive environments Clean this device 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 o...

Page 5: ...press the button to disable the unit The button goes dark 2 Set the output current Press the Output button on the touch screen Press the encoder knob to set the resolution Turn the encoder knob to set the output current from 0 mA to 15700 mA Press the Done button 3 Set the bias current Press the Bias button on the touch screen Press the encoder knob to set the resolution Turn the encoder knob to s...

Page 6: ...n on the front panel The button illuminates Controlling the PCX 7420 From a Computer 1 Disable the PCX 7420 Send the command OUTPUT DISABLE 2 Set the main output current Send the command MAIN CURRENT SETPOINT n n 0 to 15700 Units are milliamperes 3 Set the bias output current Send the command BIAS CURRENT SETPOINT n n 0 to 5800 Units are milliamperes 4 Set the trigger to internal or external as ne...

Page 7: ...rent to set the diode just below the lasing point This minimizes the diode s response time to the main pulse The bias pulse amplitude is adjustable from 0 A to 5 8 A and its width is adjustable from 0 ms to 25 ms The main pulse current adds to the bias current and energizes the diode at the intended time The main pulse current is adjustable from 0 A to 15 7 A and its width is adjustable from 50 ns...

Page 8: ...970 493 1901 or sales directedenergy com Document 7650 0004 Rev C2 Copyright 2019 Directed Energy Inc All rights reserved Panel Layout All features of the front and rear panel are labeled Their functions are covered in the next section ...

Page 9: ...en Provides a graphic user interface and front panel touch control for most of the functions of the PCX 7420 Encoder Knob Turn to change a value Push to cycle through the resolutions increments of value change Keyswitch ON enables the PCX 7420 OFF disables the PCX 7420 Sync Output A BNC connector that provides synchronization pulses to external devices The sync pulse is triggered by the leading ed...

Page 10: ...r the factory supplied shorting BNC plug Closed contacts or use of the shorting plug enables the output Open contacts or removal of the shorting plug disables the output and creates a rear enable fault IMON Output A BNC connector that provides a connection to an oscilloscope The signal is a voltage that represents the current output Scaling is 36 mV 1 A into 50 Ω Ethernet Cable Connector Communica...

Page 11: ...n Off keyswitch On enables the output Output Cable A factory supplied cable that provides high current pulses to external devices A DB 37 male connector fits the socket on the rear panel of the PCX 7420 a DB 37 female connector is on the user end Output Cable Connector Pinouts The male DB 37 connector interfaces with the instrument and has the following pinout Pins 1 through 16 positive output Pin...

Page 12: ...e anode Pins 20 through 35 negative connection to laser diode cathode Pins 17 18 19 36 37 no connection Interlock The DEI instrument requires that pins 18 and 19 of the male DB 37 be connected to satisfy an interlock that determines whether the output cable is present If this connection is not detected the instrument will not be enabled Output Cable Diagram The diagram below depicts the male and f...

Page 13: ... the diode connection is correct If necessary review the output cable pinout in the Specifications section 3 Make the other connections as necessary External Trigger External Bias Sync IMON Rear Enable and the connection to the computer 4 Connect the power cable Power Up 1 Turn the power switch ON I The unit plays a tune and the ENABLE button flashes green as the unit initializes The PCX 7420 powe...

Page 14: ...ncoder knob to select a resolution x0 001 x0 010 x0 100 or x1 000 3 Turn the encoder knob to adjust the output current The range is 0 A to 15 7 A 4 On the screen press the Done button Set the Bias Current BIAS CURRENT SETPOINT BIAS CURRENT SETPOINT n 1 On the Home screen press the Bias button 2 The Set Bias Current screen appears Press the encoder knob to select a resolution x0 001 x0 010 x0 100 o...

Page 15: ...der knob to select a resolution x0 025 x0 100 x1 x100 or x1000 3 Turn the encoder knob to adjust the pulse width The range is 0 05 µs to 5000 µs 4 On the screen press the Done button Set the Bias Width TRIG INT BIAS PULSEWIDTH TRIG INT BIAS PULSEWIDTHn 1 On the Home screen press the Bias Width button 2 The Set Bias Width screen appears Press the encoder knob to select a resolution x0 025 x0 100 x1...

Page 16: ...creen press the gray Trigger button 2 The Select Trigger screen appears Press the button for the desired trigger mode If you select Internal Trigger the Home screen reappears Set the Frequency If you select External Trigger the Set Termination screen appears Set the Termination if necessary OR Set the Termination TRIG EXT TERM TRIG EXT TERM n If you selected External Trigger the External Trigger H...

Page 17: ...nob to change the resolution x100 x1000 or x10000 3 Turn the encoder knob to adjust the trigger frequency The range is 40 Hz to 100000 Hz 4 On the screen press the Done button The Home screen reappears View Information About the PCX 7420 IDN 1 On the Home screen press the tools button 2 The Settings screen appears Press the About button 3 The About screen appears View the model number serial numbe...

Page 18: ...creen press the tools button 2 The Settings screen appears Press the Save Settings button 3 The Save screen appears Press the button for one of the four locations to which you want to save the settings NOTE Saving to a location overwrites any data previously stored at that location 4 A progress indicator appears When it is finished press the upper left icon button to return to the Home screen ...

Page 19: ...call Settings RECALL n 1 On the Home screen press the tools button 2 The Settings screen appears Press the Recall Settings button 3 The Recall screen appears Press the button for one of the four locations from which you want to recall the settings 4 A progress indicator appears When it is finished press the upper left icon button to return to the Home screen ...

Page 20: ...as turned OFF during disabled operation This is also the display after clearing a keyswitch hardware warning or a keyswitch fault Turn the keyswitch ON to continue Keyswitch Hardware Warning FAULT CLEAR ALL The user attempted to enable the PCX 7420 while the keyswitch was OFF On the screen press the Clear Warning button The Home screen appears with a red keyswitch status icon Turn the keyswitch ON...

Page 21: ... cable causes this fault This is also the display after clearing a rear enable hardware warning or rear enable fault Rear Enable Hardware Warning FAULT CLEAR ALL The user attempted to enable the PCX 7420 while the rear enable was disabled On the screen press the Clear Warning button The Home screen appears with a red rear enable status icon Enable the rear enable to continue Rear Enable Fault FAUL...

Page 22: ...st air temperature exceeded the safe temperature operating range View the Communication Settings 1 On the Home screen press the tools button 2 The Settings screen appears Press the Comm Settings button 3 The PCX 7420 Comm screen appears Press the button for the desired port If you select RS232 The screen reports the Baud rate the number of data bits and stop bits and the parity If you select USB T...

Page 23: ...red press the Settings button The Ethernet Configuration screen appears Make desired entries in the appropriate fields Pressing any of the three buttons returns the Home screen Power Down 1 Disable the unit by pressing the front panel BUTTON or by sending a computer command OUTPUT DISABLE 2 Turn the keyswitch OFF 3 Turn the unit OFF at the power switch WARNING Risk of fatal electric shock Wait at ...

Page 24: ... sent to the PCX 7420 the PCX 7420 sends a response The user s software must wait for a response before sending another command to avoid an overflow of the PCX 7420 receive buffer The commands are in alphabetical order except LIST In the examples the command or query is in black the response is in blue italics LIST Lists all commands and queries supported by the PCX 7420 Example LIST IDN SAVE RECA...

Page 25: ...he codes for the faults are 0 No Fault 1 Keyswitch was turned off while the instrument was enabled 2 Rear Enable was disabled while the instrument was enabled 4 Ambient or exhaust temperature was out of range while the instrument was enabled 8 AC DC supply was out of range 16 An open load was detected The first listed fault is the most recent The example below shows there have been no faults since...

Page 26: ...POINT 15000 OUTPUT Returns whether the output is enabled or disabled Example OUTPUT Disabled OUTPUT DISABLE Disables the output the same as pressing the front panel ENABLE button so it is unlit Example OUTPUT DISABLE Disabled OUTPUT ENABLE Enables the output the same as pressing the front panel ENABLE button so it lights green Example OUTPUT ENABLE Enabled if successful Command Failed Keyswitch or...

Page 27: ...er the keyswitch is enabled or disabled Example STATUS KEYSWITCH Disabled STATUS REAR ENABLE Returns whether the rear enable is enabled or disabled Example STATUS REAR ENABLE Disabled TEMP IN Returns the temperature of the intake air in degrees Celsius Example TEMP IN 27 TEMP EXHAUST Returns the temperature of the exhaust air in degrees Celsius Example TEMP EXHAUST 38 C TRIG Returns the whether th...

Page 28: ...TRIG EXT TERM 50 TRIG INTERNAL Sets the trigger to internal Example TRIG INTERNAL Internal TRIG INT FREQ Returns the internal trigger frequency in hertz Example TRIG INT FREQ 2400 Hz TRIG INT FREQ n Sets the internal trigger frequency in hertz The value of n must be from 40 to 100000 Example TRIG INT FREQ 2400 2400 Hz TRIG INT MAIN PULSEWIDTH Returns the pulse width of the main current pulse in na...

Page 29: ...TRIG INT MAIN PULSEWIDTH280000 TRIG INT BIAS PULSEWIDTH Returns the pulse width of the bias current pulse in nanoseconds Example TRIG INT BIAS PULSEWIDTH 12000 nsec TRIG INT BIAS PULSEWIDTH n Sets the pulse width of the main current pulse The value of n must be in nanoseconds from 0 to 25000000 Example TRIG INT BIAS PULSEWIDTH12000 TRIG INT BIAS PULSEWIDTH1 ...

Page 30: ...bligation to make any change whatever in units previously delivered 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 warran...

Page 31: ...Page 31 of 32 For more information 970 493 1901 or sales directedenergy com Document 7650 0004 Rev C2 Copyright 2019 Directed Energy Inc All rights reserved CE Declaration ...

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