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Remote interface operation

1. DCD 1 1 1 2 RX 2 2 2 3 TX 3 3 3 4 DTR j 4 ie 5 cnD 5 gt lt 5 5 l 6 DSR 6 6 8 7 RTS 7 7 e CTS 8 8 8 gt lt 20 RI 9 9 9 DB9 DB9 DB9 DB9 DB25 DB25 Male Female Female Male Female Male Figure 2 5 DB 25 serial connection DTR DSR handshake protocol The power supply is configured as a DTE Data Terminal Equipment device and uses the DTR Data Terminal Ready and DSR Data Set Ready lines of the RS 232 interface to handshake The power supply uses the DTR line to send a hold off signal The DTR line must be TRUE before the power supply will accept data from the interface When the power supply sets the DTR line FALSE the data must cease within 10 characters To disable the DTR DSR handshake do not connect the DTR line and tie the DSR line to logic TRUE If you disable the DTR DSR handshake also select a slower baud rate to ensure that the data is transmitted correctly E3632A User s Guide E3632A User s Guide Operation and Features 2 RS 232 Interface Configuration The power supply sets the DTR line FALSE in the following cases 1 When the power supply s input buffer is full when approximately 100 characters have been received it sets the DTR line FALSE pin 4 on the RS 232 connector When enough characters have been removed to make space in the input buffer the power supply sets the DTR line TRUE unless the second case see next prevents this 2 When t
2. Recall me Error vo Ea Config On Ott Calfprate Seohre T Output 5 Power s O 00000 S j Ee 00000 Figure 1 2 Front panel Table 1 3 Front panel overview No Item Description 1 15 V 7 A range selection key Select the 15 V 7 A range and allow the full rated output to 15 V 7 A 2 30 V 4 A range selection key Select the 30 V 4 A range and allow the full rated output to 30 V 4 A 18 E3632A User s Guide Getting Started 1 Product at a Glance Table 1 3 Front panel overview continued No Item Description 3 Overvoltage protection key Enable or disable the overvoltage protection function set the trip voltage level and clear the overvoltage condition 4 Overcurrent protection key Enable or disable the overcurrent protection function set the trip current level and clear the overcurrent condition 5 Display limit key Display the voltage and current limit values on the display and allow the knob adjustment for setting the limit values 6 Recall operating state key Recall a previously stored operating state from location 1 2 or 3 7 Store operating state Local key Store an operating state in location 1 2 or 3 or return the power supply to the local mode from the remote interface mode 8 Error Calibrate key 2 Display the error codes generated durin
3. E3632A User s Guide 2 Operation and Features 2 Programming the Overcurrent Protection Enable the output The OFF annunciator turns off and the display will go to the meter mode Enter the OCP menu and set the desired trip level LEVEL 7 5 A You will see the above message on the display when you enter the OCP menu Adjust the knob for the desired OCP trip level Enable the OCP circuit OCP ON You will see the above message after pressing Over Current Exit the OCP menu CHANGED The CHANGED message is displayed for a second to show that the new OCP trip level is now in effect If the OCP settings are not changed NO CHANGE will be displayed The power supply will exit the OCP menu and the display will return to the meter mode Check that the OCP annunciator turns on Checking the OCP operation To check OCP operation raise the output current to near the trip point Then very gradually increase the output by turning the knob until the OCP circuit trips This will cause the power supply s output current to drop to zero and the OCP annunciator to flash The OCP TRIPPED message also appears on the display 39 2 40 Operation and Features Programming the Overcurrent Protection Over Current or Display Limit Cy Los Over Current C Over Current Clearing the overcurrent condition When the OCP condition occurs the OCP TRIPPED messa
4. PERSONNEL FOR CONTINUED FI PROTECTION USE SPECIFIED LINE FUSE FUSE LINE 100V 10 1 fV cccoo D ney ee D Q i O 250V 230v 10 CJ Figure 1 4 Rear panel Table 1 4 Rear panel overview No Description 1 Power line voltage setting 2 Power line fuse holder assembly 3 AC inlet 4 Power line module 5 GPIB IEEE 488 interface connector 6 RS 232 interface connector E3632A User s Guide 21 Getting Started Product at a Glance Use the front panel I O Config key to Select the GPIB or RS 232 interface see Chapter 2 Set the GPIB bus address see Chapter 2 Set the RS 232 baud rate and parity see Chapter 2 Display annunciators Anil E3632A 0 15V 7A 0 30V 4A gilemt oc power supply EEEE EEE EEEE YN UN AN UN UN VN AN Ii Adrs Rmt 15V 30V OVP OCP CAL Limit ERROR OFF Unreg Figure 1 5 Display annunciators Table 1 5 Display annunciators overview Item Description Adrs The power supply is addressed to listen or talk over a remote interface Rmt The power supply is in the remote interface mode 15 V Shows the 15 V 7 A range is selected 30 V Shows the 30 V 4 A range is selected OVP The overvoltage protection function is enabled when the annunciator
5. E3632A DC Power Supply User s Guide 7 Characteristics and Specifications Physical Characteristics 168 Environmental Characteristics 169 Electrical Specifications 169 Supplemental Characteristics 171 This chapter lists the characteristics and specifications of the E3632A DC power supply Specifications are warranted in the temperature range of 0 to 40 C witha resistive load Supplemental characteristics which are not warranted but are descriptions of performance determined either by design or testing 7 Characteristics and Specifications Physical Characteristics Physical Characteristics Table 7 1 Physical characteristics Dimensions W x H x D 212 6 mm x 132 6 mm x 348 2 mm 168 Weight Net 9 5 kg Shipping 12kg Cooling Fan cooled OODD 3 OOOO E 0000 i e 212 6mm 348 2mm A mnu oot 3 L o D ERERITEROUUL A 4 Jaz 227 7mMm ad 374 0mm Figure 7 1 3632A dimensions E3632A User s Guide Characteristics and Specifications 7 Environmental Characteristics Environmental Characteristics Refer to Environmental Conditions on page VI Electrical Specifications Table
6. Fan test failed This test checks if the fan current is flowing If the current is not detected at power on self test the power supply will beep and the error annunciator will be turned on Fan test failure could likely induce overtemperature condition in the power supply System DAC test failed This test checks if the DAC hardware is functional The main controller U17 U10 for serial MY53xx6xxx sends a reference voltage data to DAC and converts the DAC output to digital data to see if the digital data is within a valid range Hardware test failed This test checks the status of voltage and current error amplifiers for the power circuit of output1 If both amplifiers are not operational the power supply will beep and the error annunciator will be turned on 1 This error message is only applicable for serial MY53xx6xxx 136 E3632A User s Guide ErrorMessages 4 Calibration Error Messages Calibration Error Messages The following errors indicate failures that may occur during a calibration Refer to the Service Guide for more information Table 4 3 Calibration error messages 701 702 703 704 705 708 712 713 714 Cal security disabled by jumper The calibration security feature has been disabled with a jumper inside the power supply When applicable this error will occur at power on to warn you that the power supply is unsecured Cal secured The power supply is secured against calibration
7. Invalid secure code An invalid calibration security code was received when attempting to unsecure or secure the power supply You must use the same security code to unsecure the power supply as was used to secure it and vice versa The security code may contain up to 12 alphanumeric characters The first character must be a letter Secure code too long A security code was received which contained more than 12 characters Cal aborted A calibration in progress is aborted when you press any front panel key send a device clear or change the local remote state of the instrument Cal output disabled Calibration is aborted by sending the OUTP OFF command during an output calibration Bad DAC cal data The specified DAC calibration values CAL VOLT or CAL CURR are out of range Note that the new calibration constants are not stored in the non volatile memory Bad readback cal data The specified readback calibration values CAL VOLT or CAL CURR are out of range Note that the new calibration constants are not stored in the non volatile memory Bad OVP cal data The overvoltage protection calibration constant is out of range Note that the new calibration constants are not stored in the non volatile memory E3632A User s Guide 137 4 Error Messages Calibration Error Messages Table 4 3 Calibration error messages continued 715 Bad OCP cal data The overcurrent protection calibration constant is out of range Note tha
8. e The display state is stored in volatile memory the display is always enabled when power has been off after a remote interface reset or after returning to local from remote e You can display a message on the front panel by sending a command from the remote interface The power supply can display up to 12 characters of the message on the front panel any additional characters are truncated Commas periods and semicolons share a display space with the preceding character and are not considered individual characters When a message is displayed outputs are not sent to the display e Sending a message to the display from the remote interface overrides the display state this means that you can display a message even if the display is turned off The display state is automatically turned on when you return to the local front panel operation Press Local to return to the local state from the remote interface Remote interface operation DISP OFF ON Disable enable the display DISP TEXT lt quoted string gt Display the string enclosed in quotes DISP TEXT CLE Clear the displayed message 48 E3632A User s Guide Operation and Features 2 System Related Operations The following statement shows how to display a message on the front panel from a Keysight controller DISP TEXT HELLO Firmware revision query The power supply has three microprocessors for control of various internal systems You can que
9. 102 103 104 105 108 109 112 Invalid character An invalid character was found in the command string You may have inserted a character such as or in the command keyword or within a parameter Example OUTP STAT ON Syntax error Invalid syntax was found in the command string You may have inserted a blank space before or after a colon in the command header or before a comma Example VOLT LEV 1 Invalid separator An invalid separator was found in the command string You may have used a comma instead of a colon semicolon or blank space or you may have used a blank space instead of a comma Example TRIG SOUR BUS or APPL 1 0 1 0 Data type error The wrong parameter type was found in the command string You may have specified a number where a string was expected or vice versa GET not allowed A Group Execute Trigger GET is not allowed within a command string Parameter not allowed More parameters were received than expected for the command You may have entered an extra parameter or added a parameter to a command that does not accept a parameter Example APPL 10 Missing parameter Fewer parameters were received than expected for the command You omitted one or more parameters that are required for this command Example APPL Program mnemonic too long A command header was received which contained more than the maximum 12 characters allowed 130 E3632A User s
10. Bench operation Cleaning 24 Your power supply must be installed in a location that allows sufficient space at the sides and rear of the power supply for adequate air circulation The rubber bumpers must be removed for rack mounting No cleaning is required for this product If you wish to remove dust from the enclosure use a dry cloth E3632A User s Guide KEYSIGHT TECHNOLOGIES E3632A DC Power Supply User s Guide 2 Operation and Features Overview 26 Constant Voltage Operation 28 Constant Current Operation 30 Storing and Recalling Operating States 33 Programming the Overvoltage Protection 35 Programming the Overcurrent Protection 38 Remote Voltage Sensing 41 Disabling the Output 44 System Related Operations 46 Remote Interface Configuration 51 GPIB Interface Configuration 56 RS 232 Interface Configuration 57 Calibration 63 This chapter describes the operations and features for the E3632A DC power supply 2 Operation and Features Overview Overview The following section describes an overview of the front panel keys before operating your power supply e The power supply is shipped from the factory configured in the front panel operation mode At power on the power supply is automatically set to operate in the front panel operation mode When in this mode the front panel keys can be used When the power supply is in remote operation mode you can return to front panel operation mode at any time b
11. memory 3 Restore the operating state DONE This message appears on the display for approximately 1 second E3632A User s Guide Operation and Features 2 Programming the Overvoltage Protection Remote interface operation Use the following commands to store and recall the power supply state SAV 1 2 3 Store an operating state to a specified location RCL 1 2 3 Recall a previously stored state from a specified location Programming the Overvoltage Protection Overvoltage protection guards the load against output voltages that reach a specified value greater than the programmed protection level It is accomplished by shorting the output via an internal SCR when the trip level is set to equal or greater than 3 V or by progamming the output to 1 V when the trip level is set to less than 3 V The following steps show how to set the OVP trip level how to check OVP operation and how to clear overvoltage condition Front panel operation Setting the OVP level and enable the OVP circuit Power 1 Turn on the power supply The power supply will go into the power on reset state the output is disabled the OFF annunciator turns on the 15 V 7 A range is selected the 15V annunciator turns on and the knob is selected for voltage control Output On Off 2 Enable the output The OFF annunciator turns off and the display will go to the meter mode E3632A User s Guide 35 2 Oper
12. the load increases the output current will cause a small drop in the output voltage of the power supply due to the output impedance R Any resistance in the connecting wire will add to this resistance and increase the voltage drop Using the largest possible hook up wire will minimize the voltage drop Using the remote sense leads at the load will compensate for lead resistance in the load leads 155 6 Tutorial Output Characteristics Figure 6 6 Simplified diagram of the common mode and normal mode sources of noise When the load changes very rapidly as when a relay contact is closed the inductance in the hook up wire and in the power supply output will cause a spike to appear at the load The spike is a function of the rate of change of the load current When very rapid changes in load are expected a capacitor with a low series resistance in parallel with the power supply and close to the load is the best way to minimize these voltage spikes 156 E3632A User s Guide Connecting the Load Tutorial 6 Connecting the Load Output isolation The output of the power supply is isolated from chassis ground Any output terminal may be grounded or an external voltage source may be connected between any terminal output and ground However output terminals must be kept within 60 Vdc when metal shorting bars without insulation are used to connect the output to the sense and the output and the sense
13. 05 99 68 E3632A User s Guide KEYSIGHT TECHNOLOGIES E3632A DC Power Supply User s Guide 3 Remote Interface Reference SCPI Command Summary 70 Introduction to the SCPI Language 74 Simplified Programming Overview 80 Using the APPLy Command 83 Output Settings and Operation Commands 85 Triggering Commands 93 System Related Commands 96 Calibration Commands 102 RS 232 Interface Commands 106 SCPI Status Registers 107 Status Reporting Commands 117 Halting an Output in Progress 121 SCPI Conformance Information 122 IEEE 488 Conformance Information 125 This chapter lists the SCPI commands 3 Remote Interface Reference SCPI Command Summary SCPI Command Summary 70 If you are a first time user of the SCPI language refer to Introduction to the SCPI Language and Simplified Programming Overview to familiarize with the SCPI language before attempting to program the power supply This section summarizes the Standard Commands for Programmable Instruments SCPI available to program the power supply over the remote interface Refer to the respective sections in this chapter for more details on each command Throughout this manual the following conventions are used for the SCPI command syntax e Square brackets indicate optional keywords or parameters e Braces enclose parameters within a command string e Triangle brackets lt gt indicate that you must substitute a value or a code for th
14. 33 Front panel operation 33 Remote interface operation 35 Programming the Overvoltage Protection 35 Front panel operation 35 Remote interface operation 37 Programming the Overcurrent Protection 38 Front panel operation 38 Remote interface operation 40 Remote Voltage Sensing 41 CV regulation 41 Output rating 42 Output noise 42 Stability 42 Remote voltage sensing connections 43 Disabling the Output 44 Front panel operation 44 Remote interface operation 44 Disconnecting the output using an external relay 45 Knob locking 45 System Related Operations 46 Self test 46 Error conditions 47 Display control 48 Firmware revision query 49 SCPI language version 49 Remote Interface Configuration 51 Remote interface selection 51 GPIB address 52 Baud rate selection RS 232 52 E3632A User s Guide Parity selection RS 232 53 To set the GPIB address 53 To set the baud rate and parity RS 232 54 GPIB Interface Configuration 56 RS 232 Interface Configuration 57 RS 232 configuration overview 57 RS 232 data frame format 58 Connection to a computer or terminal 58 DTR DSR handshake protocol 60 RS 232 troubleshooting 62 Calibration 63 Calibration security 63 To unsecure for calibration 64 To secure against calibration 65 To change the security code 66 Calibration count 67 Calibration message 68 3 Remote Interface Reference SCPI Command Summary 70 Introduction to the SCPI Language 74 Command format used inthis manual 75
15. 54 Operation and Features Remote Interface Configuration I O Config 4 Save the change and turn off the I O configuration mode CHANGE SAVED The address is stored in non volatile memory and does not change when power has been off or after a remote interface reset The power supply displays a message to show that the change is now in effect If the GPIB address is not changed NO CHANGE will be displayed for one second To exit the 1 0 configuration mode without any further changes press I O Config until the NO CHANGE message is displayed To set the baud rate and parity RS 232 To configure the power supply for the RS 232 interface proceed as follows I O Config od I O Config 1 Turn on the remote configuration mode HPIB 488 You will see the above message on the display if the power supply has not been changed from the factory setting Notice that if you changed the remote interface selection to RS 232 before RS 232 message will be displayed Choose the RS 232 interface RS 232 You can choose the RS 232 interface by turning the knob to the left 3 Move to the RS 232 interface setting mode and select the baud rate 9600 BAUD The rate is set to 9600 baud when the power supply is shipped from the factory Choose from one of the following by turning the knob to the right or left 300 600 1200 2400 4800 or 9600 baud E3632A User s Guide 7 EY I O
16. 7 2 Electrical specifications Voltage output V Low range OVto 15V pene s High range 0 V to 30 V Current output A Low range 0Ato7A at 0 lt C to 40 0 High range OAto4A Programming accuracy Voltage 0 05 10 mV 12 mionthsi at es Peet Current 0 2 10 mA of output offset Readback accuracy Voltage 0 05 5 mV 12 months over GPIB and RS 232 Current 0 15 5 mA or front panel with respect to the actual output at 25 C 5 C of output offset Ripple and noise Normal mode lt 0 35 mVrms and 2 mVpp with outputs ungrounded or with voltage either output terminal grounded 20 Hz to 20 MHz Normal mode lt 2 mArms current Common mode lt 1 5 pArms current Load regulation Voltage lt 0 01 2 mV of output tite Current lt 0 01 250 uA Change in output voltage or current for any load change within ratings with remote sensing connected E3632A User s Guide 169 7 Characteristics and Specifications Electrical Specifications Table 7 2 Electrical specifications continued Line regulation Voltage of output offset Change in output voltage and Current current for any line change within ratings Programming resolution Voltage Current Readback resolution Voltage Current Front panel resolution Voltage Current Transient response time Command processing time OVP and OCP accuracy Overvoltage of output offset protection OVP Overcurrent prot
17. CLS clear status command does not clear enable registers but it does clear the bits in the event registers To enable bits in an enable register you must write a decimal value which corresponds to the binary weighted sum of the bits you wish to enable in the register 107 3 Remote Interface Reference SCPI Status Registers SCPI status system duestionable Stat LTAGE JRRENT 1 NOT US ased TEMPERAT Ise Ise Ik ised ERVOLTAGE 9 IVERCURR 1O VOT USE JT US lot us t uS TAT QUE STAT QUES ENA alu TAT QUES ENA Event Eve Enabl peration Complete ot u uery Error _QYE e Dependent Error JE Execution Error EXE Command Error CME Not use ver On ES ESE lu ESE Figure 3 1 108 7 ES ES serial SRE lt value STB SRE T 20 7 rae 2 2 27 4 23 8 24 16 25 32 2 64 27 128 28 256 29 512 210 1024 211 2048 212 4096 213 8192 214 16384 215 32768 SCPI status system E3632A User s Guide Remote Interface Reference 3 SCPI Status Registers The Questionable Status register The Questionable Status register provides information about voltage and current regulation Bit 0 is set when the voltage becomes unregulated and bit 1 is set if the current becomes unregulated
18. Command separators 76 Using the MIN and MAX parameters 77 Querying parameter settings 77 SCPI command terminators 78 IEEE 488 2 common commands 78 SCPI parameter types 78 Simplified Programming Overview 80 Using the APPLy command 80 Using the low level commands 80 E3632A User s Guide XIII Reading a query response 81 Selecting a trigger source 81 Power supply programming ranges 82 Using the APPLy Command 83 APPLy lt voltage gt DEF MIN MAX lt current gt DEF MIN MAX 83 APPLy 84 Output Settings and Operation Commands 85 Triggering Commands 93 Trigger source choices 93 Triggering commands 95 System Related Commands 96 Calibration Commands 102 RS 232 Interface Commands 106 SCPI Status Registers 107 What is an event register 107 What is an enable register 107 SCPI status system 108 The Questionable Status register 109 The Standard Event register 110 The Status Byte register 112 Using Service Request SRQ and Serial POLL 113 Using STB to read the Status Byte 114 Using the Message Available Bit MAV 114 To interrupt your bus controller using SRQ 115 To determine when a command sequence is completed 115 Using OPC to signal when data is in the output buffer 116 Status Reporting Commands 117 Halting an Output in Progress 121 XIV E3632A User s Guide E3632A User s Guide 5 6 SCPI Conformance Information 122 SCPI confirmed commands 122 Device specific commands 124 IEEE 488 Conformance
19. Config I O Config E3632A User s Guide Operation and Features 2 Remote Interface Configuration 4 Save the change and choose the parity NONE 8 BITS The power supply is configured for 8 data bits with no parity when shipped from the factory Choose from one of the following by turning the knob to the right or left None 8 Bits Odd 7 Bits or Even 7 Bits When you set parity you are indirectly setting the number of the data bits 5 Save the change and turn off the I O configuration mode CHANGE SAVED The RS 232 baud rate and parity selections are stored in non volatile memory and does not change when power has been off or after a remote interface reset The power supply displays a message to show that the change is now in effect If the baud rate and the parity are not changed NO CHANGE will be displayed for one second To exit the 1 0 configuration mode without any further changes press I 0 Config until the NO CHANGE message is displayed 55 2 Operation and Features GPIB Interface Configuration GPIB Interface Configuration 56 The GPIB connector on the rear panel connects your power supply to the computer and other GPIB devices Chapter 1 Getting Started lists the cables that are available from Keysight Technologies A GPIB system can be connected together in any configuration star linear or both as long as the following rules are observed e The total number of d
20. Current In cells A5 type 0 6 Fill in the cells A4 to A15 in 0 02 increments so that cell A15 contains 0 8 Now while the cursor is still in the worksheet select Tools Macro from the menu Double click on the Diode macro in the Macro dialog box The power supply will reset to power on condition and then step through the voltages in the worksheet After each step the current is measured and recorded in the worksheet Make any changes to suit your needs in the Diode bas module Change the GPIB address in the routine OpenPort contained in the GPIB bas module If there is a system error when trying to run the macro you may have to reboot the PC for the GPIB port to work E3632A User s Guide Application Programs Example Program for Excel 5 0 Windows 3 1 and GPIB Diode bas Macro Option Explicit VOT TTT Te Tee Te Te Tee Te TT Ay Te TT Ay Te UT Ay TT ay Tee vy ve vy Wve ay vee vy vee ay vee a nea This is the subroutine first executed Modify this routine to suit your needs To change the GPIB address go to the module GPIB Sub OpenPort and change the variable VISAaddr 5 to the required GPIB address rnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn Sub Diode Range B5 B15 ClearContents Dim I As Integer OpenPort SendSCpl Rsi Reset E3632A to power on condition SendSCPI Output ON Turn on the output For I 5 To 15 Convert the worksheet value to a string add to SCPI com
21. Execution error messages 130 Self test error messages 135 Calibration errormessages 137 Wire rating 158 Slew rate 160 Physical characteristics 168 Electrical specifications 169 Supplemental characteristics 171 XIX XX THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK E3632A User s Guide KEYSIGHT TECHNOLOGIES E3632A DC Power Supply User s Guide 1 Getting Started Introduction 2 Standard Shipped Items 7 Preparing the Power Supply 9 Product ata Glance 18 Operating the Power Supply 24 This chapter guides you to set up your power supply for the first time An introduction to all the features of the power supply is also given 1 Getting Started Introduction Introduction The Keysight E3632A is a high performance 120 W dual range DC power supply with GPIB and RS 232 interfaces The combination of bench top and system features in this power supply provides versatile solutions for your design and test requirements Convenient bench top features Dual range Easy to use knob control settings Highly visible vacuum fluorescent display meters High accuracy and high resolution Remote voltage sensing Overvoltage and overcurrent protection Output on off Excellent load and line regulation and low ripple and noise Operating states storage Portable ruggedized case with non skid feet Flexible system features GPIB IEEE 488 and RS 232 interfaces are standard SCPI Standard Commands for Programmable
22. Guide ErrorMessages 4 Execution Error Messages Table 4 1 Execution error messages continued 113 1141 120 121 123 124 128 130 131 134 Undefined header A command was received that is not valid for this power supply You may have misspelled the command or it may not be a valid command If you are using the short form of the command remember that it may contain up to four letters Example TRIGG DEL 3 Header suffix out of range The numeric suffix attached to a command header is not one of the allowable values Example OUTP2 ON Numeric data error An invalid number was specified for a numeric parameter Example APPL 1 0E 320000 Invalid character in number An invalid character was found in the number specified for a parameter value Example ESE B01010102 Numeric overflow A numeric parameter was found whose exponent was larger than 32000 Too many digits A numeric parameter was found whose mantissa contained more than 255 digits excluding leading zeros Numeric data not allowed A numeric parameter was received but a character string was expected Example DISP TEXT 123 Suffix error A suffix was incorrectly specified for a numeric parameter You may have misspelled the suffix or the numeric parameter does not accept a suffix Example TRIG DEL 0 5 SECS Invalid suffix A suffix was incorrectly specified for a numeric parameter You may have misspelled the suff
23. Information 125 Dedicated hardware lines 125 Addressed commands 125 IEEE 488 2 common commands 126 Error Messages Overview 128 Front panel operation 128 Remote interface operation 129 Execution Error Messages 130 Self Test Error Messages 135 Calibration Error Messages 137 Application Programs Overview 140 Example Program for C GPIB IEEE 488 141 Example Program for Excel 5 0 Windows 3 1 and GPIB 144 Tutorial Overview of the Power Supply Operation 150 Output Characteristics 152 Unregulated state 154 Unwanted signals 154 Connecting the Load 157 Output isolation 157 Multiple loads 157 XV Remote voltage sensing 158 Load consideration 159 Extending the Voltage Range and Current Range 162 Series connections 162 Parallel connections 163 Remote Programming 164 Reliability 166 7 Characteristics and Specifications Physical Characteristics 168 Environmental Characteristics 169 Electrical Specifications 169 Supplemental Characteristics 171 XVI E3632A User s Guide List of Figures E3632A User s Guide Figure 1 1 Figure 1 2 Figure 1 3 Figure 1 4 Figure 1 5 Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 3 1 Figure 6 1 Figure 6 2 Figure 6 3 Figure 6 4 Figure 6 5 Figure 6 6 Figure 6 7 Figure 6 8 Figure 6 9 Figure 7 1 Shorting conductors without insulation 5 Frontpanel 18 Voltage and current limit settings 20 Rear panel 21 Display annunciators 22 Recomme
24. VOLT MIN return the highest and lowest programmable voltage levels for the selected range VOLTage STEP lt numeric value gt DEFault This command sets the step size for voltage programming with the VOLT UP and VOLT DOWN commands To set the step size to the minimum resolution set the step size to DEFault The minimum resolution of the step size is approximately 0 55 mV The VOLT STEP DEF returns the minimum resolution of your instrument The immediate voltage level increases or decreases by the value of the step size For example the output voltage will increase or decrease 10 mV if the step size is 0 01 This command is useful when you program the power supply to the allowed minimum resolution At RST the step size is the value of the minimum resolution VOLTage STEP DEFault This query returns the value of the step size currently specified The returned parameter is a numeric value DEFault gives the minimum resolution step size in unit of volts 89 3 Remote Interface Reference Output Settings and Operation Commands Example The following program segments show how to use the VOLT UP or VOLT DOWN command to increase or decrease the output voltage with the VOLT STEP command VOLT STEP 0 01 Set the step size to 0 01 V VOLT UP Increase the output voltage VOLT STEP 0 02 Set the step size to 0 02 V VOLT DOWN Decrease the output voltage VOLTage TRIGgered lt voltage gt MINimum MAXimum This co
25. after installing two jumpers inside the power supply Refer to the Service Guide E3632 90010 for more information Do not use the RS 232 interface if you have configured the power supply to output relay control signals Internal components on the RS 232 circuitry may be damaged Knob locking The knob locking function can be used to disable the knob thereby preventing any unwanted changes during an experiment or when you leave the power supply unattended To disable the knob press the resolution selection key until the blinking digit disappears Notice that the knob and front panel keys are disabled when in the remote interface mode E3632A User s Guide 45 2 Operation and Features System Related Operations System Related Operations 46 Self test This section gives information on topics such as self test error conditions and front panel display control This information is not directly related to setting up the power supply but is an important part of operating the power supply A power on self test occurs automatically when you turn on the power supply This test assures you that the power supply is operational This test does not perform the extensive set of tests that are included as part of the complete self test described below If the power on self test fails the ERROR annunciator turns on A complete self test performs a series of tests and takes approximately two seconds to execute If all tests pass y
26. and the current value is 20 mA At RST the output state is OFF E3632A User s Guide Remote Interface Reference 3 System Related Commands OUTPut This query returns the output state of the power supply The returned value is 0 OFF or 1 ON OUTPut RELay OFF ON This command sets the state of two TTL signals on the RS 232 connector These signals are intended for use with an external relay and relay driver The TTL output is available on the RS 232 connector pin 1 and pin 9 When the OUTPut RELay state is ON the TTL output of pin 1 is high 4 5 V and pin 9 is low 0 5 V The levels are reversed when the OUTPut RELay state is OFF At RST the OUTPut RELay state is OFF TTL output of pin 1 or pin 9 of the RS 232 connector is available only after installing two jumpers inside the power supply Refer to the Service Guide for more information Do not use the RS 232 interface if you have configured the power supply to output relay control signals Internal components on the RS 232 circuitry may be damaged OUTPut RELay This command returns the state of the TTL relay logic signals See also OUTP REL command SYSTem BEEPer Issue a single beep immediately E3632A User s Guide 97 3 Remote Interface Reference System Related Commands SYSTem ERRor This command queries the power supply s error queue When the front panel ERROR annunciator turns on one or more command syntax or hardware errors have be
27. beeps once each time an error is generated e If more than 20 errors have occurred the last error stored in the queue the most recent error is replaced with 350 Queue overflow No additional errors are stored until you remove errors from the queue If no errors have occurred when you read the error queue the power supply responds with 0 No error e The error queue is cleared when power has been off or after a CLS clear status command has been executed The RST reset command does not clear the error queue E3632A User s Guide 117 3 118 Remote Interface Reference Status Reporting Commands STATus QUEStionable CONDition This command queries the Questionable Status condition register to check CV or CC mode of the power supply The power supply returns a decimal value which corresponds to the binary weighted sum of all bits in the register These bits are not latched If 0 is returned the power supply is in output off or unregulated state If 1 is returned the power supply is in the CC operating mode and if 2 is returned the power supply is in the CV operating mode If 3 is returned the power supply is in failure STATus QUEStionable This command queries the Questionable Status event register The power supply returns a decimal value which corresponds to the binary weighted sum of all bits in the register These bits are latched Reading the event register clears it STATus QUEStionable ENA
28. defaultRM viOpen defaultRM Visa_address 0 0 amp power_supply Query the power supply id read response and print viPrintf power_supply IDN n viScanf power_supply s amp reply_string printf Instrument identification string n s n n reply string Initialize Power Supply viPrintf power supply RST n Set power on condition viPrintf power supply Current 2 n Set Current limit to 2A 7 viPrintf power_supply Output on n Turn output on printf Voltage Current n n Print heading Step from 0 6v to 0 8 volt in 02volt steps for voltage 6 voltage lt lt 8001 voltage 02 viPrintf power_supply Volt f n voltage set voltage Ay printf 3 voltage print power supply setting delay 500 allow output to settle for 500 msec viPrintf power supply Measure Current n measure output current ko viScanf power_supply 1f amp current retrieve reading printf 31f n current print reading 142 E3632A User s Guide viPrintf power supply Output Off n Close communication session viClose power supply viClose defaultRM Pauses for a specified number of milliseconds void delay clock _t wait clock_t goal clock _t delay wait wait 1000 delay clock_t wait CLOCKS PER SEC goal delay clock while goal gt clock End of program E3632
29. directory These are usually found at c vxipnp win lib msc and c vxipnp win include This example program steps the E3632A DC Power Supply through 10 voltages and measures the current response It prints the voltage step and the current response as a table Note that include include include include lt visa h gt lt stdio h gt lt string h gt lt time h gt the GPIB address is the default address from the factory for the E3632A Provides a delay of the specified time wait in milliseconds void delay clock _t wait void main ViSession defaultRM ViSession power supply char reply string 256 char GP IB_address 3 char Visa_address 40 double double E3632A User s voltage current Guide resource manager id xy session id to an instrument string returned from instrument GPIB address of instrument X7 Complete VISA address send to card oy value of voltage sent to power supply Eva value of current output of power supply 141 5 Application Programs Example Program for C GPIB IEEE 488 build the address needed to open communication with GPIB card address format looks like this GPIBO 5 INSTR 7x 7 strcpy GPIB address 5 Change GPIB address here strcpy Visa_address GPIBO strcat Visa_address GPIB address Open communication session with power supply viOpenDefaultRM amp
30. e Calibrating the power supply including changing the calibration security code 1 Getting Started Introduction e Configuring the power supply for remote interfaces e Enabling or disabling the output When operated over the remote interface the power supply can be both a listener and a talker Using an external controller you can instruct the power supply to set the output and to send the status data back over the GPIB or RS 232 interfaces Capabilities include the following features e Voltage and current programming e Voltage and current readback e Present and stored status readback e Programming syntax error detection e Complete self test The front panel Vacuum Fluorescent Display VFD includes e Displaying actual values of output voltage and current meter mode e Or displaying the limit values of voltage and current limit mode e Checking the operating status from the annunciators e Checking the type of error from the error codes messages Connections to the power supply s output and to chassis ground are made to binding posts on the front panel Floating the power supply output more than 60 Vdc from the chassis presents an electric shock hazard to the operator Do not float the outputs more than 60 Vdc when metal shorting bars without insulation are used to connect the output to the sense and the output to the sense terminals E3632A User s Guide Getting Started
31. of performance a linear regulated supply has a very precise regulating properties and responds quickly to variations of the line and load Hence its line and load regulation and transient recovery time are superior to supplies using other regulation techniques The power supply also exhibits low ripple and noise is tolerant of ambient temperature changes and with its circuit simplicity has a high reliability The Keysight E3632A contains a linear regulated power supply It is controlled by a control circuit that provides voltages to program the outputs The power supply sends back to the control circuits a voltage representing the output at the terminals The control circuits receive information from the front panel and send information to the display Similarly the control circuits talk to the remote interface for input and output with the GPIB and RS 232 interfaces The remote interface is at earth ground and isolated from the control circuit and the power supply ISOLATIO HP IB gt oOo 4 CONTROL POWER SUPPLY DISPLAY OUTPUT RS 232 lt O Figure 6 2 Block diagram of the power supply showing the remote interface isolation E3632A User s Guide 151 6 Tutorial Output Characteristics Output Characteristics An ideal constant voltage power supply would have a zero output impedance at all frequencies Thus as shown in Figure 6 3 the voltage would rema
32. operate the power supply over the remote interface you must configure the power supply for the remote interface This section gives information on configuring the remote interface For additional information on programming the power supply over the remote interface Refer to Chapter 3 Remote Interface Reference Remote interface selection E3632A User s Guide The power supply is shipped with both a GPIB IEEE 488 interface and an RS 232 interface on the rear panel Only one interface can be enabled at a time The GPIB interface is selected when the power supply is shipped from the factory The remote interface can be selected from the front panel only e The interface selection is stored in non volatile memory and does not change when power has been off or after a remote interface reset If you select the GPIB interface you must select a unique address for the power supply The current address is displayed momentarily on the front panel when you turn on the power supply e Your GPIB bus controller has its own address Be sure to avoid using the bus controller s address for any instrument on the interface bus Keysight controllers generally use address 21 e If you enable the RS 232 interface you must select the baud rate and parity to be used RS 232 is displayed momentarily on the front panel when you turn on the power supply if you have selected this interface 1 Refer to GPIB Interface Configurat
33. panel Baud rate e 300 600 1200 2400 4800 or 9600 baud factory setting Parity and data bits e None 8 data bits factory setting even 7 data bits or odd 7 data bits Number of start bits e 1 bit fixed Number of stop bits e 2 bits fixed 57 2 Operation and Features RS 232 Interface Configuration RS 232 data frame format A character frame consists of all the transmitted bits that make up a single character The frame is defined as the characters from the start bit to the last stop bit inclusively Within the frame you can select the baud rate number of data bits and parity type The power supply uses the following frame formats for seven and eight data bits Figure 2 3 RS 232 data frame format Connection to a computer or terminal To connect the power supply to a computer or terminal you must have the proper interface cable Most computers and terminals are DTE Data Terminal Equipment devices Since the power supply is also a DTE device you must use a DTE to DTE interface cable These cables are also called null modem modem eliminator or crossover cables The interface cable must also have the proper connector on each end and the internal wiring must be correct Connectors typically have nine pins DB 9 connector or 25 pins DB 25 connector with a male or female pin configuration A male connector has pins inside the connector shell and a female connector has
34. power supply whenever the overvoltage condition occurs If external voltage source such as a battery is connected across the output and the overvoltage condition inadvertently occurs the SCR will continuously sink a large current from the source and possibly damage the power supply To avoid this a diode must be connected in series with the output as shown in Figure 2 1 E3632A User s Guide 37 2 Operation and Features Programming the Overcurrent Protection BATTERY SUPPLY Figure 2 1 Recommended protection circuit for battery charging Programming the Overcurrent Protection 38 Overcurrent protection guards the load against output currents that reach a specified value greater than the programmed protection level It is accomplished by programming the output current to zero The following steps show how to set the overcurrent protection trip level how to check OCP operation and how to clear overcurrent condition Front panel operation Power Setting the OCP level and enable the OCP circuit 1 Turn on the power supply The power supply will go into the power on reset state the output is disabled the OFF annunciator turns on the 15 V 7 A range is selected the 15V annunciator turns on and the knob is selected for voltage control E3632A User s Guide Output On Off Over Current C ta Over Current Over Current
35. setting In this case the power supply is in the constant voltage mode and the current setting acts as a current limit perating Lir Figure 6 5 Output characteristics E3632A User s Guide 153 154 Tutorial Output Characteristics When the load R is less than R the output current will dominate since the voltage will be less than the set voltage The power supply is said to be in constant current mode The load at point 2 has a relatively low resistance the output voltage is less than the voltage setting the output current is at the current setting The supply is in constant current mode and the voltage setting acts as a voltage limit Unregulated state If the power supply should goes into a mode of operation that is neither CV or CC the power supply is unregulated In this mode the output is not predictable The unregulated condition may be the result of the AC line voltage below the specifications The unregulated condition may occur momentarily For example when the output is programmed for a large voltage step the output capacitor or a large capacitive load will charge up at the current limit setting During the ramp up of the output voltage the power supply will be in the unregulated mode During the transition from CV to CC as when the output is shorted the unregulated state may occur briefly during the transition Unwanted signals An ideal power supply has a perfect DC output with no signals across t
36. steps show how to clear the overvoltage conditions and get back to normal mode operation In the following steps the display will go back to OVP TRIPPED if you let the display time out after about several seconds E3632A User s Guide Operation and Features 2 Programming the Overvoltage Protection Over Voltage or 1 Readjust the OVP trip level or the output voltage level Display Limit Lower the output voltage level below the OVP trip point O after pressing Display Limit or raise the OVP trip level E by using the knob after pressing Over Voltage Over Voltage 2 Move to the clear mode OVP ON You will see the above message after pressing Over Voltage If you changed the output voltage level press the Over Voltage twice Turn the knob to the right until the OVP CLEAR message appears on the display Over Voltage 3 Clear the overvoltage condition and exit this menu Now when you press Over Voltage again the DONE message is displayed for a second and the OVP annunciator will not flash any more The output will return to meter mode Remote interface operation VOLT PROT lt voltage gt MIN MAX Set the OVP level VOLT PROT STAT OFF ON Disable or enable the OVP circuit VOLT PROT CLE Clear the tripped OVP circuit The power supply s OVP circuit contains a crowbar SCR which effectively shorts the output of the
37. turns on or the overvoltage protection circuit has caused the power supply to shut down when the annunciator flashes OCP The overcurrent protection function is enabled when the annunciator turns on or the overcurrent protection circuit has caused the power supply to shut down when the annunciator flashes CAL The power supply is in the calibration mode Limit The display shows the limit values of the voltage and current 22 E3632A User s Guide Getting Started 1 Product at a Glance Table 1 5 Display annunciators overview continued Item Description ERROR Hardware or remote interface command errors are detected and the error bit has not been cleared OFF The output of the power supply is disabled Refer to System Related Operations on page 46 for more information Unreg The output of the power supply is unregulated output is neither CV nor CC CV The power supply is in the constant voltage mode CC The power supply is in the constant current mode To review the display annunciators hold down Display Limit as you turn on the power supply E3632A User s Guide 23 1 Getting Started Operating the Power Supply Operating the Power Supply Cooling The power supply can operate at the rated specifications within the temperature range of 0 C to 40 C A fan cools the power supply by drawing air through the sides and exhausting it out the back Using a Keysight rack mount will not impede the flow of air
38. up to 40 characters The power supply should be unsecured before sending a calibration message CALibration STRing This command queries the calibration message and returns a quoted string CALibration VOLTage DATA lt numeric value gt This command can only be used after calibration is unsecured and the output state is ON It enters a voltage value that you obtained by reading an external meter You must first select the minimum calibration level CAL VOLT LEV MIN for the value being entered You must then select the middle and maximum calibration levels CAL VOLT LEV MID and CAL VOLT LEV MAX for the value being entered Three successive values must be selected and entered The power supply then computes new voltage calibration constants These constants are then stored in non volatile memory CALibration VOLTage LEVel MINimum MIDd1le MAXimum This command can only be used after calibration is unsecured and the output state is ON It sets the power supply to a calibration point that is entered with the CAL VOLT command During calibration three points must be entered and the low end point MIN must be selected and entered first E3632A User s Guide Remote Interface Reference 3 Calibration Commands CALibration VOLTage PROTection This command calibrates the overvoltage protection circuit of the power supply It takes about seven seconds to execute the command The calibration must be unsecured and the o
39. 1 Introduction a Output S e s L A Float voltage 60 Vdc Max tol shorting conductors without insulation Figure 1 1 Shorting conductors without insulation WARNING Outputs can be floated to maximum of 240 Vdc provided that the metal shorting bars without insulation are either replaced with insulated conductors or they are removed from the terminals so there is no operator access to the output conductors without insulation All field wiring insulation must be adequate for the voltage present f Output S S L O O O O O Float voltage 240 Vdc Max tol insulated shorting conductors 5 E3632A User s Guide 1 Getting Started Introduction The power supply is shipped with a detachable 3 wire grounding type power cord The AC line fuse is an extractor type on the rear panel The power supply can be calibrated from the front panel directly or with a controller over the GPIB or RS 232 interface using calibration commands Correction factors are stored in non volatile memory and are used during output programming Calibration from the front panel or a controller eliminates the need to remove the top cover or even the need to remove the power supply from your system cabinet You can guard against unauthorized calibration by using the Secured calibration protection function 6 E3632A User s Guide Getting Started Standard Shipped Items Standard Shipped Items Options Table 1 1 E3632A options V
40. 5 A 1Vto32V 0A to7 5A Up to 1 V per each lead Add 5 mV to specification for each 1 V change in the output lead due to load current changes Subtract the voltage drop in the load leads from the specified output voltage rating lt 0 01 3 mV lt 0 02 3 mA lt 0 02 1 mV lt 0 1 1 mA 50 ms full load 20 ms no load 45 ms full load 400 ms no load e 60 Vdc when connecting shorting conductors without insulation between the output and the sense terminals and between the output and the sense terminals e 240 Vdc when connecting insulated shorting conductors between the output and the sense terminals and between the output and the sense terminals e 115 Vac 10 47 Hz to 63 Hz standard e 230 Vac 10 47 Hz to 63 Hz option 0E3 100 Vac 10 47 Hz to 63 Hz option 0E9 E3632A User s Guide 171 7 Characteristics and Specifications Supplemental Characteristics Table 7 3 Supplemental characteristics continued Maximum input power 500 VA with full load Output voltage overshoot lt 1V Programming language SCPI Standard Commands for Programmable Instruments State storage memory Three user configurable stored states Recommended calibration interval 1 year 1 Maximum change in the output or readback per C after a 30 minute warm up 2 Following a 30 minute warm up with the output in the ON state according to the operating mode CC wi
41. A User s Guide K4 turn off Application Programs Example Program for C GPIB IEEE 488 output 5 143 5 Application Programs Example Program for Excel 5 0 Windows 3 1 and GPIB Example Program for Excel 5 0 Windows 3 1 and GPIB 144 Excel VB Macros may be used to control your Keysight E3632A With Excel you can take the value of a cell in a spread sheet send it to the power supply and then record the response on the worksheet The example on the following pages characterizes a component across the Keysight E3632A terminals This example reads 11 voltages from a worksheet programs the Keysight E3632A to that voltage and then reads the current The value of current is recorded next to the voltage on the spread sheet The example is for Excel 5 0 in Windows 3 1 To write macros and control the power supply in Excel first open a module in Excel From the Insert menu choose Macro and then Module Name the module created this way Diode bas click the right mouse button on the tab Create one more module named GPIB bas The module GPIB bas will set up all the overhead needed to talk to the GPIB port This module will subroutines that allow the communication in a simple form The macro called Diode is an example that tests a diode using the other module To try the example for characterizing a diode type in both modules Once the modules are completed go to a worksheet In cell A4 type Volts in cell B4 type
42. Ble lt enable value gt This command enables bits in the Questionable Status Enable register The selected bits are then reported to the Status Byte STATus QUEStionable ENABle This command queries the Questionable Status Enable register The power supply returns a binary weighted decimal representing the bits set in the enable register CLS This command clears all event registers and Status Byte register ESE lt enable value gt This command enables bits in the Standard Event Enable register The selected bits are then reported to the Status Byte E3632A User s Guide E3632A User s Guide Remote Interface Reference 3 Status Reporting Commands ESE This command queries the Standard Event Enable register The power supply returns a decimal value which corresponds to the binary weighted sum of all bits in the register ESR This command queries the Standard Event register The power supply returns a decimal value which corresponds to the binary weighted sum of all bits in the register OPC This command sets the Operation Complete bit bit 0 of the Standard Event register after the command is executed OPC This command returns 1 to the output buffer after the command is executed Psc 0 1 Power on status clear This command clears the Status Byte and the Standard Event register enable masks when power is turned on PSC 1 When PSC 0 is in effect the Status Byte and Standard Event r
43. CC operation proceed as follows 1 Connect a load to the output terminals With power off connect a load to the and output terminals 2 Turn on the power supply The power supply will go into the power on reset state the output is disabled the OFF annunciator turns on the 15 V 7 A range is selected the 15V annunciator turns on and the knob is selected for voltage control To operate the power supply in the 30 V 4 A range press 30V 4A before proceeding to the next step The 30V annunciator turns on E3632A User s Guide Display Limit Cy os Volt Curr a ta Display Limit E3632A User s Guide Operation and Features 2 Constant Current Operation Set the display to the limit mode Notice that the Limit annunciator flashes indicating that the display is in the limit mode When the display is in the limit mode you can see the voltage and current limit values of the selected supply In constant current mode the current values between the meter mode and limit mode are the same but the voltage values are not Moreover if the display is in the meter mode you cannot see the change of voltage limit value when adjusting the knob We recommend that you should set the display to the limit mode to see the change of voltage limit value in the constant current mode whenever adjusting the knob 4 5 Adjust the knob for the desired voltage limit 1 Check th
44. For example if the power supply momentarily goes to the constant current mode when the power supply is operating as a voltage source constant voltage mode bit 0 is set to indicate that the voltage output is not regulated The Questionable Status register also provides information that the power supply has an overtemperature condition and that the overvoltage and overcurrent protection circuits have tripped Bit 4 reports an overtemperature condition of the fan bit 9 reports that the overvoltage protection circuit has tripped and bit 10 reports that the overcurrent protection circuit has tripped To read the register send STATus QUEStionable Table 3 4 Bit definitions Questionable Status register Bit Decimal value Definition 0 Voltage 1 The power supply is was in the constant current mode 1 Current 2 The power supply is was in the constant voltage mode 2 3 Not used 0 Always set to 0 4 Over temperature 16 The fan has a fault condition 5 8 Not used 0 Always set to 0 9 Over voltage 512 The overvoltage protection circuit has tripped 10 Over current 1024 The overcurrent protection circuit has tripped 11 15 Not used 0 Always set to 0 E3632A User s Guide The Questionable Status event register is cleared when e you execute the CLS clear status command e you query the event register using STAT QUES status questionable event register command 109 3 Remote Interface Reference SCPI Status Registe
45. Instruments compatibility I O setup easily done from front panel Software calibration no internal adjustments required E3632A User s Guide E3632A User s Guide Getting Started 1 Introduction The E3632A DC power supply features a combination of programming capabilities and linear power supply performance that makes it ideal for power systems applications The power supply is programmable locally from the front panel or remotely over the GPIB and RS 232 interfaces This power supply has two ranges allowing more voltage at a lower current The desired output range is selected from the front panel or over the remote interfaces Operational features e Dual range of 15 V 7 A or 30 V 4 A e Constant voltage CV or constant current CC operation e Overvoltage protection OVP and overcurrent protection OCP e Three storage locations 1 to 3 for user defined operating states e Automatic power on self test e Remote sensing for load voltage e User calibration from the front panel or via the remote interfaces Front panel operations e Easy to use knob control e Output range selection e Enabling or disabling OVP and OCP features Setting the OVP and OCP trip levels Clearing OVP and OCP conditions e Setting and displaying the voltage and current limit values e Saving and recalling operating states e Returning the power supply to local mode from remote interface mode e Displaying remote interface error message
46. Keysight E3632A DC Power Supply KEYSIGHT User s Guide TECHNOLOGIES NOTICE This document contains references to Agilent Technologies Agilent s former Test and Measurement business has become Keysight Technologies For more information go to www keysight com KEYSIGHT TECHNOLOGIES Notices Keysight Technologies 1997 2014 No part of this manual may be reproduced in any form or by any means including elec tronic storage and retrieval or translation into a foreign language without prior agree ment and written consent from Keysight Technologies as governed by United States and international copyright laws Manual Part Number 3632 90001 Edition Edition 7 November 2014 Keysight Technologies 1400 Fountaingrove Parkway Santa Rosa CA 95403 Warranty The material contained in this document is provided as is and is subject to change without notice in future editions Further to the maximum extent permitted by the applicable law Keysight disclaims all warranties either express or implied with regard to this manual and any information contained herein including but not limited to the implied warranties of merchantabil ity and fitness for a particular purpose Keysight shall not be liable for errors or for incidental or consequential damages in connection with the furnishing use or performance of this document or of any information contained herein Should Key sight and
47. OGIES
48. OTection STATe 0 1 OFF ON VOLTage PROTection STATe VOLTage PROTection TRIPped VOLTage PROTection CLEar VOLTage RANGe P15V P30V LOW HIGH VOLTage RANGe MEASure CURRent DC VOLTage DC Triggering Commands INITiate IMMediate TRIGger SEQuence DELay lt seconds gt MIN MAX DELay SOURce BUS IMM SOURCe TRG E3632A User s Guide 71 3 Remote Interface Reference SCPI Command Summary Table 3 1 SCPI command summary continued System Related Commands DISPlay WINDow STATe OFF ON STATe TEXT DATA lt quoted string gt TEXT DATA TEXT CLEar SYSTem BEEPer IMMediate ERRor VERSion OUTPut RELay STATe OFF ON RELay STATe STATe OFF ON STATe IDN RST TST SAV 1 2 3 RCL 1 2 3 Calibration Commands CALibration COUNt CURRent DATA lt numeric value gt CURRent LEVel MIN MID MAX CURRent PROTection DAC ERRor SECure CODE lt new code gt SECure STATe OFF ON lt code gt SECure SIATE STRing lt quoted string gt STRing VOLTage DATA lt numeric value gt VOLTage LEVel MIN MID MAX VOLTage PROTection RS 232 Interface Commands SYSTem LOCal REMote RWLock 72 E3632A User s Guide Remote Interface Reference 3 SCPI Command Summary Table 3 1 SCPI command summary continued Status Reporting Commands STATus QUEStionable CONDition EVENt ENAB
49. Status Registers The Status Byte register The Status Byte summary register reports conditions from the other status registers Query data that is waiting in the power supply s output buffer is immediately reported through the Message Available bit bit 4 of the Status Byte register Bits in the summary register are not latched Clearing an event register will clear the corresponding bits in the Status Byte summary register Reading all messages in the output buffer including any pending queries will clear the message available bit Table 3 6 Bit definitions Status Byte summary register Bit Decimal value Definition 0 2 Not Used 0 Always set to 0 3 QUES 8 One or more bits are set in the Questionable Status register bits must be enabled in the enable register 4 MAV 16 Data is available in the power supply output buffer 5 ESB 32 One or more bits are set in the Standard Event register bits must be enabled in the enable register 6 ROS 64 The power supply is requesting service serial poll 7 Not Used 0 Always set to 0 112 The Status Byte summary register is cleared when you execute the CLS clear status command Querying the Standard Event register ESR command will clear only bit 5 in the Status Byte summary register For example 24 8 16 is returned when you have queried the status of the Status Byte register QUES and MAV conditions have occurred E3632A User s Guide Remote Interfa
50. The trigger is stored in volatile memory the source is set to bus when the power supply has been turned off or after a remote interface reset Bus software triggering e To select the bus trigger source send the following command TRIG SOUR BUS E3632A User s Guide 93 3 94 Remote Interface Reference Triggering Commands e To trigger the power supply from the remote interface GPIB or RS 232 after selecting the bus source send the TRG trigger command When the TRG command is sent the trigger action starts after the specified time delay if any delay is given You can also trigger the power supply from the GPIB interface by sending the IEEE 488 Group Execute Trigger GET message The following statement shows how to send a GET from a Hewlett Packard controller TRIGGER 705 group execute trigger To ensure synchronization when the bus source is selected send the WAI wait command When the WAI command is executed the power supply waits for all pending operations to complete before executing any additional commands For example the following command string guarantees that the first trigger is accepted and is executed before the second trigger is recognized TRIG SOUR BUS TRG WAI TRG WAI You can use the OPC operation complete query command or the OPC operation complete command to signal when the operation is complete The OPC command returns 1 to the output buffer when the operation is co
51. This query returns the currently selected range The returned parameter is P30V HIGH or P15V LOW MEASure CURRent This query returns the current measured across the current sense resistor inside the power supply MEASure VOLTage This query returns the voltage measured at the sense terminals of the power supply E3632A User s Guide Remote Interface Reference 3 Triggering Commands Triggering Commands The power supply s triggering system allows a change in voltage and current when receiving a trigger to select a trigger source and to insert a trigger Triggering the power supply is a multi step process e First you must specify the source from which the power supply will accept the trigger The power supply will accept a bus software trigger or an immediate trigger from the remote interface e Then you can set the time delay between the detection of the trigger on the specified trigger source and the start of any corresponding output change Notice that the time delay is valid for only the bus trigger source e Finally you must provide an INITiate command If the IMMediate source is selected the selected output is set to the triggered level immediately But if the trigger source is the bus the power supply is set to the triggered level after receiving the Group Execute Trigger GET or TRG command Trigger source choices You must specify the source from which the power supply will accept a trigger
52. age can be adjusted from zero to the full rated value 1 Adjust the knob until the voltmeter indicates 0 V and then adjust the knob until the voltmeter indicates 15 0 V Current output check The following steps check the basic current functions with a short across the power supply s output 1 Turn on the power supply The power supply will go into the power on reset state the output is disabled the OFF annunciator turns on the 15 V 7 A range is selected the 15V annunciator turns on and the knob is selected for voltage control 2 Connecta short across the and output terminals with an insulated test lead 3 Enable the output The OFF annunciator turns off and the 15V OVP and OCP annunciators are lit The CV or CC annunciator turns on depending on the resistance of the test lead The blinking digit can be adjusted by turning the knob Notice that the display is in the meter mode Meter mode means that the display shows the actual output voltage and current 4 Adjust the voltage limit value to 1 0 V Set the display to the limit mode the Limit annunciator will be flashing Adjust the voltage limit to 1 0 V to assure CC operation The CC annunciator will turn on 1 You can use the resolution selection keys to move the flashing digit to the right or left when setting the voltage E3632A User s Guide Volt Curr Getting Started 1 Preparing the Power Supply 5 Check that the front panel ammeter properly
53. age values between the meter and limit modes are the same but the current values are not Moreover if the display is in the meter mode you cannot see the change of current limit value when adjusting the knob We recommend that you should set the display to the limit mode to see the change of current limit value in the constant voltage mode whenever adjusting the knob E3632A User s Guide Operation and Features 2 Constant Voltage Operation 4 Adjust the knob for the desired current limit AO Check that the Limit annunciator still flashes Set the knob for current control The first digit of the ammeter will be flashing The flashing digit can be changed using the resolution selection keys and the flashing digit can be adjusted by turning the knob Adjust the knob to the desired current limit Volt Curr C d 5 Adjust the knob for the desired output voltage Check that the Limit annunciator still flashes Set the knob for voltage control The second digit of the voltmeter will be flashing Change the flashing digit using the resolution selection keys and adjust the knob for the desired output voltage Display Limit 6 Return to the meter mode Press Display Limit or let the display time out after several seconds to return to the meter mode Notice that the Limit annunciator turns off and the display shows the OUTPUT OFF message Output On Off 7 Enable the output The OFF annunciator turns off a
54. at the Limit annunciator still flashes and the second digit of voltmeter flashes to indicate the knob is selected for voltage control The flashing digit can be changed using the resolution keys and the flashing digit can be adjusted by turning the knob Adjust the knob for the desired voltage limit Adjust the knob for the desired output current Check that the Limit annunciator still flashes Set the knob for current control The first digit of the ammeter will be flashing Change the flashing digit using the resolution selection keys and adjust the knob to the desired output current Return to the meter mode Press Display Limit or let the display time out after several seconds to return to the meter mode Notice that the Limit annunciator turns off and the display shows the OUTPUT OFF message 1 You can use the resolution selection keys to move the flashing digit to the right or left when setting the voltage 31 2 Operation and Features Constant Current Operation 7 Enable the output The OFF annunciator turns off and the 15V or 30V OVP OCP and CC annunciators are lit Notice that the display is in the meter mode In the meter mode the display shows the actual output voltage and current Refer to Programming the Overvoltage Protection on page 35 and Programming the Overcurrent Protection on page 38 for more information on the OVP and OCP annunciators 8 Verify that the power supply is in t
55. ate a trigger to the trigger subsystem that has selected a bus software trigger as its source TRIG SOUR BUS The command has the same effect as the Group Execute Trigger GET command For RS 232 operation make sure the power supply is in the remote interface mode by sending the SYST REM command first 95 3 Remote Interface Reference System Related Commands System Related Commands 96 DISPlay OFF ON Turn the front panel display off or on When the display is turned off outputs are not sent to the display and all annunciators are disabled except the ERROR annunciator The display state is automatically turned on when you return to the local mode Press Local to return to the local state from the remote interface DISPlay This query returns the front panel display setting Returns 0 OFF or 1 ON DISPlay TEXT lt quoted string gt Display a message on the front panel The power supply will display up to 12 characters in a message any additional characters are truncated Commas periods and semicolons share a display space with the preceding character and are not considered individual characters DISPlay TEXT This query returns the message sent to the front panel and returns a quoted string DISPlay TEXT CLEar Clear the message displayed on the front panel OUTPut OFF ON Enable or disable the outputs of the power supply When the output is disabled the voltage value is 0 V
56. ation and Features Programming the Overvoltage Protection EN Over Voltage Q Over Voltage Over Voltage 36 3 Enter the OVP menu and set the desired trip level LEVEL 32 0 V You will see the above message on the display when you enter the OVP menu Adjust the control knob for the desired OVP trip level Note that you cannot set the trip levels to lower than 1 0 V 4 Enable the OVP circuit OVP ON You will see the above message after pressing Over Voltage 5 Exit the OVP menu CHANGED The CHANGED message is highlighted for a second to show that the new OVP trip level is now in effect If the OVP settings are not changed NO CHANGE will be displayed The power supply will exit the OVP menu and the display will return to the meter mode Check that the OVP annunciator turns on Checking the OVP operation To check OVP operation raise the output voltage to near the trip point Then very gradually increase the output by turning the knob until the OVP circuit trips This will cause the power supply output to drop to near zero the OVP annunciator to flash and the CC annunciator to turn on The OVP TRIPPED message also appears on the display Clearing the overvoltage condition When the OVP condition occurs the OVP TRIPPED message is shown on the display the OVP annunciator flashes When it was caused by external voltage source such as a battery disconnect it first The following
57. atures RS 232 Interface Configuration RS 232 troubleshooting Here are a few things to check if you are having problems communicating over the RS 232 interface If you need additional help refer to the documentation that came with your computer e Verify that the power supply and your computer are configured for the same baud rate parity and number of data bits Make sure that your computer is set up for one start bit and two stop bits these values are fixed on the power supply Make sure to execute the SYSTem REMote command to place the power supply in the remote mode Verify that you have connected the correct interface cable and adapters Even if the cable has the proper connectors for your system the internal wiring may be incorrect The Keysight 34398A Cable Kit can be used to connect the power supply to most computers or terminals Verify that you have connected the interface cable to the correct serial port on your computer COM1 COM2 etc E3632A User s Guide Operation and Features 2 Calibration Calibration This section gives an overview of the calibration features of the power supply For more detailed discussion of the calibration procedures refer to the Service Guide E3632 90010 Calibration security This feature allows you to enter a security code to prevent accidental or unauthorized calibrations of the power supply When you first receive your power supply it is secured Before you can calib
58. be cleared After this command the output current is restored to the state it was in before the current protection tripped and the OCP trip level remains unchanged to the value presently programmed Before sending this command lower the output current below the trip OCP point or raise the OCP trip level above the output setting VOLTage lt voltage gt MINimum MAXimum UP DOWN This command programs the immediate voltage level of the power supply The immediate level is the voltage value of the output terminals The VOLTage command changes the output of the power supply to the newly programmed value regardless of the output range presently selected You can substitute MINimum or MAXimum in place of a specific value for the voltage parameter MIN selects the lowest voltage values of 0 V MAX selects the highest voltage values allowed for the selected range E3632A User s Guide E3632A User s Guide Remote Interface Reference 3 Output Settings and Operation Commands This command also increases or decreases the immediate voltage level using the UP or DOWN parameter by a predetermined amount The command VOLTage STEP sets the amount of increment and decrement Notice that a new increment setting will cause an execution error 222 Data out of range when the maximum or the minimum rated voltage is exceeded VOLTage MINimum MAXimum This query returns the presently programmed voltage level of the power supply VOLT MAX and
59. ce Reference 3 SCPI Status Registers The Status Byte Enable register request service is cleared when e you execute the SRE 0 command e you turn on the power and have previously configured the power supply using the PSC 1 command The enable register will not be cleared at power on if you have previously configured the power supply using PSC 0 Using Service Request SRQ and Serial POLL E3632A User s Guide You must configure your bus controller to respond to the IEEE 488 service request SRQ interrupt to use this capability Use the Status Byte Enable register SRE command to select which summary bits will set the low level IEEE 488 service request signal When bit 6 request service is set in the Status Byte an IEEE 488 service request interrupt message is automatically sent to the bus controller The bus controller may then poll the instruments on the bus to identify which one requested service the instrument with bit 6 set in its Status Byte The request service bit is cleared only by reading the Status Byte using an IEEE 488 serial poll or by reading the event register whose summary bit is causing the service request To read the Status Byte summary register send the IEEE 488 serial poll message Querying the summary register will return a decimal value which corresponds to the binary weighted sum of the bits set in the register Serial poll will automatically clear the request service bit in the Status Byt
60. d refer to error messages 601 to 755 in Self Test Error Messages on page 135 and Calibration Error Messages on page 137 110 E3632A User s Guide Remote Interface Reference 3 SCPI Status Registers Table 3 5 Bit definitions Standard Event register continued Bit Decimal value Definition 4 EXE 16 Execution Error An execution error occurred refer to error messages 211 to 223 in Execution Error Messages on page 130 5 CME 32 Command Error A command syntax error occurred refer to error messages 104 to 178 in Execution Error Messages on page 130 6 Not Used 0 Always set to 0 7 PON 128 Power On Power has been turned off and on since the last time the event register was read or cleared The Standard Event register is cleared when e you execute the CLS clear status command e you query the event register using the ESR Event Status register command For example 28 4 8 16 is returned when you have queried the status of the Standard Event register QYE DDE and EXE conditions have occurred The Standard Event Enable register is cleared when e you execute the ESE 0 command e you turn on the power and have previously configured the power supply using the PSC 1 command The enable register will not be cleared at power on if you have previously configured the power supply using the PSC 0 command E3632A User s Guide 111 3 Remote Interface Reference SCPI
61. d leads must be added to the load voltage to calculate maximum output voltage The performance specifications are not guaranteed when the maximum output voltage is exceeded If the excessive demand on the power supply forces the power supply to lose regulation the Unreg annunciator will turn on to indicate that the output is unregulated Any noise picked up on the sense leads also appears at the output of the power supply and may adversely affect the voltage load regulation Twist the sense leads to minimize external noise pickup and run them parallel and close to the load leads In noisy environments it may be necessary to shield the sense leads Ground the shield at the power supply end only Do not use the shield as one of the sense conductors Using remote sensing under certain combinations of load lead lengths and large load capacitances may cause your application to form a filter which becomes part of the voltage feedback loop The extra phase shift created by this filter can degrade the power supply s stability resulting in poor transient response or loop instability In severe cases it may cause oscillations To minimize this possibility keep the load leads as short as possible and twist them together As the sense leads are part of the power supply s programming feedback loop accidental open connections of E3632A User s Guide Operation and Features 2 Remote Voltage Sensing sense or load leads during remote sensing opera
62. dividual power supplies The output of each power supply can be set separately The output voltage controls of one power supply should be set to the desired output voltage the other power supply should be set for a slightly higher output voltage The supply with the higher output voltage setting will deliver its constant current output and drop its output voltage until it equals the output of the other supply and the other supply will remain in constant voltage operation and only deliver that fraction of its rated output current which is necessary to fulfill the total load demand 163 Tutorial Remote Programming Remote Programming 164 During remote programming a constant voltage regulated power supply is called upon to change its output voltage rapidly The most important factor limiting the speed of output voltage change is the output capacitor and load resistor ASYMPTOTIC LEVEL ILR Q E NEW Eour TC R Co E INITIAL Eout LRE m Tr RISE TIME RL CoLOGe IRE LRL E 2 We eee t2 NEW Egyt IS REACHED IS PROGRAMMED L t NEW Egur EQUIVA FOR t lt t lt tz LENT CIRCUIT Figure 6 8 Speed of response programming up full load The equivalent circuit and the nature of the output voltage waveform when the supply is being programmed upward are shown in Figure 6 8 When the new output is programmed the power supply regulator circuit senses that the outp
63. e condition can be cleared with the VOLT PROT CLE command after the condition that caused the OVP trip is removed At RST this value is set to ON VOLTage PROTection STATe This query returns the state of the overvoltage protection function The returned parameter is 0 OFF or 1 ON VOLTage PROTection TRIPped This query returns a 1 if the overvoltage protection circuit is tripped and not cleared or a 0 if not tripped VOLTage PROTection CLEar This command causes the overvoltage protection circuit to be cleared After this command the output voltage is restored to the state it was in before the protection feature occurred and the OVP trip level remains unchanged to the value presently programmed Before sending this command lower the output voltage below the OVP trip point or raise the OVP trip level above the output setting E3632A User s Guide 91 3 92 Remote Interface Reference Output Settings and Operation Commands VOLTage RANGe P15v P30V LOW HIGH This command selects an output range to be programmed by the identifier When 15 V 7 A range is selected the maximum programmable voltage and current are limited to 15 45 V and 7 21 A When 30 V 4 A range is selected the maximum programmable voltage and current are limited to 30 90 V and 4 12 A P30V or HIGH is the identifier for the 0 V 4 A range and P15V or LOW is for the 15 V 7 A range At RST the 15 V 7 A range is selected VOLTage RANGe
64. e enclosed parameter e A vertical bar separates one of two or more alternative parameters E3632A User s Guide Remote Interface Reference 3 SCPI Command Summary Table 3 1 SCPI command summary Output Settings and Operation Commands APPLy lt voltage gt DEF MIN MAX lt current gt DEF MIN MAX APPLy SOURce CURRent LEVel IMMediate AMPLitude lt current gt MIN MAX UP DOWN CURRent LEVel1 IMMediate AMPLitude MIN MAX CURRent LEVel IMMediate STEP INCRement lt numeric value gt DEFault CURRent LEVel IMMediate STEP INCRement DEFault CURRent LEVel TRIGgered AMPLitude lt current gt MIN MAX CURRent LEVel TRIGgered AMPLitude MIN MAX CURRent PROTection LEVel lt current gt MIN MAXx CURRent PROTection LEVel MIN MAX CURRent PROTection STATe 0 1 OFF ON CURRent PROTection STATe CURRent PROTection TRIPped CURRent PROTection CLEar VoLTage LEVel IMMediate AMPLitude lt voltage gt MIN MAX UP DOWN VOLTage LEVel IMMediate AMPLitude MIN MAX VOLTage LEVel IMMediate STEP INCRement lt numeric value gt DEFault VOLTage LEVel IMMediate STEP INCRement DEFault VOLTage LEVel TRIGgered AMPLitude lt voltage gt MIN MAX VOLTage LEVel TRIGgered AMPLitude MIN MAX VOLTage PROTection LEVel lt voltage gt MIN MAX VOLTage PROTection LEVel MIN MAX VOLTage PR
65. e range the power supply will probably operate within its specifications The power supply is more likely to stay within specifications if only one of the voltage or current outputs is exceeded Series connections Series operation of two or more power supplies can be accomplished up to the output isolation rating of any one supply to obtain a higher voltage than that available from a single supply Series connected power supplies can be operated with one load across both power supplies or with a separate load for each power supply The power supply has a reverse polarity diode connected across the output terminals so that if operated in series with other power supplies damage will not occur if the load is short circuited or if one power supply is turned on separately from its series partners When series connection is used the output voltage is the sum of the voltages of the individual power supplies The current is the current of any one power supply Each of the individual power supplies must be adjusted in order to obtain the total output voltage 162 E3632A User s Guide Tutorial 6 Extending the Voltage Range and Current Range Parallel connections E3632A User s Guide Two or more power supplies being capable of CV CC automatic crossover operation can be connected in parallel to obtain a total output current greater than that available from one power supply The total output current is the sum of the output currents of the in
66. e receptacle Do not operate your power supply without adequate cabinet ground connection 1 You can use the resolution selection keys to move the flashing digit to the right or left when setting the current 13 1 14 Getting Started Preparing the Power Supply Power line voltage selection Power line voltage selection is accomplished by adjusting two components power line voltage selector and power line fuse on the power line module of the rear panel To change the power line voltage proceed as follows 1 Remove the power cord Remove the fuse holder assembly with a flat blade screwdriver from the rear panel 2 Install the correct line fuse Remove the power line voltage selector from the power line module 100 Vac or 230 Vac 2 5 AT fuse 15 Vac 4 AT fuse E3632A User s Guide Getting Started 1 Preparing the Power Supply 3 Rotate the power line voltage selector until the correct voltage appears 100 Vac 115 Vac or 230 Vac 7 4 Replace the power line voltage selector and the fuse holder assembly in the rear panel Verify that the correct line voltage is selected and the power line fuse is good E3632A User s Guide 15 1 Getting Started Preparing the Power Supply Rack mount the power supply The power supply can be mounted in a standard 19 inch rack cabinet using one of three optional kits available A rack mounting kit for a single instrument is available as Opt
67. e remaining string End If end of query to instrument for a response Exit Function ViIerrorHandler Display the error message in the txtResponse TextBox MsgBox I O Error amp Error Close the device session errorStatus viClose vi Exit Function End Function Sub OpenPort Dim VISAaddr As String VKKKKKKKKKKKKKKKKKKKKKKKKKKKK Change the GPIB address here VKKKKKKKKKKKKKKKKKKKKKKKKKKKK VISAaddr 5 errorStatus viOpenDefaultRM videfaultRM open the visa session Open communication to instrument errorStatus viOpen videfaultRM GPIBO amp VISAaddr amp INSTR 0 1000 vi If errorStatus lt VI_SUCCESS Then on error give message Cells 1 1 Unable to Open port End If End Sub Sub ClosePort errorStatus viClose vi close the session errorStatus viClose videfaultRM End Sub End of program E3632A User s Guide 147 5 Application Programs Example Program for Excel 5 0 Windows 3 1 and GPIB THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK 148 E3632A User s Guide KEYSIGHT TECHNOLOGIES E3632A DC Power Supply User s Guide 6 Tutorial Overview of the Power Supply Operation 150 Output Characteristics 152 Connecting the Load 157 Extending the Voltage Range and Current Range 162 Remote Programming 164 Reliability 166 This chapter describes the basic operation of a linear power supply and gives specific details on the operation and use of the E3632A DC pow
68. e summary register No other bits are affected Performing a serial poll will not affect instrument throughput 113 3 114 Remote Interface Reference SCPI Status Registers CAUTION The IEEE 488 standard does not ensure synchronization between your bus controller program and the instrument Use the OPC command to guarantee that commands previously sent to the instrument have completed Executing a serial poll before a RST CLS or other commands have completed can cause previous conditions to be reported Using STB to read the Status Byte The STB Status Byte query command is similar to a serial poll but it is processed like any other instrument commands The STB command returns the same result as a serial poll but the request service bit bit 6 is not cleared The STB command is not handled automatically by the IEEE 488 bus interface hardware and will be executed only after previous commands have completed Polling is not possible using the STB command Executing the STB command does not clear the Status Byte summary register Using the Message Available Bit MAV You can use the Status Byte Message Available bit bit 4 to determine when data is available to read into your bus controller The power supply subsequently clears bit 4 only after all messages have been read from the output buffer E3632A User s Guide Remote Interface Reference 3 SCPI Status Registers To interrupt your bus control
69. e used to secure For example CAL SEC STAT OFF HP003632 To secure against calibration E3632A User s Guide You can secure the power supply against calibration either from the front panel or over the remote interface The power supply is secured when shipped from the factory and the security code is set to HP003632 Read the security code rules at Calibration security on page 63 before attempting to secure the power supply Front panel operation 1 Select the calibration mode UNSECURED If the power supply is unsecured you will see the above message for one second by holding Calibrate for five seconds when you turn on the power supply 2 Enter the security code 000000 CODE To secure the power supply press Secure after the CAL MODE message is displayed in the calibration mode enter the security code using the knob and resolution selection keys and then press Secure 65 2 Operation and Features Calibration 3 Save the change and exit the menu SECURED When you press Secure to save the change you will see the message below The secured setting is stored in non volatile memory and does not change when power has been off or after a remote interface reset To exit the calibration mode turn the power off and on Remote interface operation CAL SEC STAT OFF ON lt code gt Secure or unsecure the power supply To secure the power supply s
70. ear action over the GPIB interface E3632A User s Guide Remote Interface Reference 3 SCPI Status Registers SCPI Status Registers All SCPI instruments implement status registers in the same way The status system records various instrument conditions in three register groups the Status Byte register the Standard Event register and the Questionable Status register groups The Status Byte register records high level summary information reported in the other register groups The diagram on the subsequent pages illustrates the SCPI status system used by the power supply What is an event register An event register is a read only register that reports defined conditions within the power supply Bits in an event register are latched Once an event bit is set subsequent state changes are ignored Bits in an event register are automatically cleared by a query of that register such as ESR or STAT QUES EVEN or by sending the CLS clear status command A reset RST or device clear will not clear bits in event registers Querying an event register returns a decimal value which corresponds to the binary weighted sum of all bits set in the register What is an enable register E3632A User s Guide An enable register defines which bits in the corresponding event register are logically ORed together to form a single summary bit Enable registers are both readable and writable Querying an enable register will not clear it The
71. ection OCP Activation time OVP Average time for the output to start to drop after OVP or OCP condition occurs OCP lt 0 01 2 mV lt 0 01 250 uA 1 mV 0 5 mA 0 5 mV 0 1 mA 1 mV 1 mA lt 50 us for the output to recover to within 15 mV following a change in the output current from full load to half load or vice versa Average time for the output voltage to begin to change after receiving the digital data when the power supply is connected directly to the GPIB or RS 232 is less than 100 ms 0 5 0 5 V 0 5 0 5 A lt 1 5 ms when the trip voltage is equal or greater than 3 V e lt 10 ms when the trip voltage is less than 3 V lt 10 ms 1 Accuracy specifications after a 1 hour warm up period with no load and calibration at 25 C 170 E3632A User s Guide Supplemental Characteristics Table 7 3 Supplemental characteristics Characteristics and Specifications 7 Supplemental Characteristics Output programming range Low range maximum programmable values High range OVP OCP Remote sensing capability Voltage drop Load regulation Load voltage Temperature coefficient Voltage of output offset Current Stability 2 Voltage of output offset Current Voltage programming speed Up Down Output terminal isolation maximum from chassis ground AC input ratings selectable via rear panel selector 0 V to 15 45 V 0 V to 7 21 A 0 V to 20 6 V 0 V to 1 54
72. egister enable masks are not cleared when power is turned on PSC This command queries the power on status clear setting The returned parameter is 0 PSC 0 or 1 PSC 1 SRE lt enable value gt This command enables bits in the Status Byte Enable register 119 3 120 Remote Interface Reference Status Reporting Commands SRE This command queries the Status Byte Enable register The power supply returns a decimal value which corresponds to the binary weighted sum of all bits set in the enable register STB This command queries the Status Byte summary register The STB command is similar to a serial poll but it is processed like any other instrument command The STB command returns the same result as a serial poll but the Request Service bit bit 6 is not cleared if a serial poll has occurred WAI This command instructs the power supply to wait for all pending operations to complete before executing any additional commands over the interface Used only in the triggered mode E3632A User s Guide Remote Interface Reference 3 Halting an Output in Progress Halting an Output in Progress You can send a device clear at any time to stop an output in progress over the GPIB interface The status registers the error queue and all configuration states are left unchanged when a device clear message is received Device clear performs the following actions e The power supply s input and output bu
73. en detected Up to 20 errors can be stored in the error queue See Chapter 4 Error Messages for more details e Errors are retrieved in the first in first out FIFO order The first error returned is the first error that was stored When you have read all errors from the queue the ERROR annunciator turns off The power supply beeps once each time an error is generated e If more than 20 errors have occurred the last error stored in the queue the most recent error is replaced with 350 Queue overflow No additional errors are stored until you remove errors from the queue If no errors have occurred when you read the error queue the power supply responds with 0 No error e The error queue is cleared when power has been off or after a CLS clear status command has been executed The RST reset command does not clear the error queue SYSTem VERSion This query returns the power supply to determine the present SCPI version The returned value is a string in the form of YYYY V where the Y represents the year of the version and the V represents a version number for that year for example 1995 0 E3632A User s Guide E3632A User s Guide Remote Interface Reference 3 System Related Commands IDN This query command reads the power supply s identification string The power supply returns four fields separated by commas The first field is the manufacturer s name the second field is the model nu
74. end the above command with the same code as used to unsecure For example CAL SEC STAT ON HP003632 To change the security code To change the security code you must first unsecure the power supply and then enter a new code Read the security code rules at Calibration security on page 63 before attempting to secure the power supply Front panel operation To change the security code first make sure that the power supply is unsecured Press Secure after the CAL MODE message is displayed in the calibration mode enter the new security code using the knob and resolution selection keys then press Secure Changing the code from the front panel also changes the code as seen from the remote interface E3632A User s Guide Operation and Features 2 Calibration Remote interface operation CAL SEC CODE lt new code gt Change the security code To change the security code first unsecure the power supply using the old security code Then enter the new code as shown below CAL SEC STAT OFF HP003632 Unsecure with the old code CAL SEC CODE ZZ001443 Enter the new code CAL SEC STAT ON 22001443 Secure with the new code Calibration count E3632A User s Guide You can determine the number of times that your power supply has been calibrated Your power supply was calibrated before it left the factory When you receive your power supply read the count to determine its initial value T
75. ensing Remote voltage sensing is used to maintain regulation at the load and reduce the degradation of regulation that would occur due to the voltage drop in the leads between the power supply and the load By connecting the power supply for remote voltage sensing voltage is sensed at the load rather than at the power supply s output terminals This will allow the power supply to automatically compensate for the voltage drop in applications with long lead lengths as well as to accurately read back the voltage directly across the load When the power supply is connected for remote sensing the OVP circuit senses the voltage at the sensing points load and not the output terminals CV regulation The voltage load regulation specification in Chapter 7 applies at the output terminals of the power supply When remote sensing add 5 mV to this specification for each 1 V drop between the positive sensing point and output terminal due to the change in load current Because the sense leads are part of the power supply s feedback path keep the resistance of the sense leads at or below 0 5 Q per lead to maintain the above specified performance E3632A User s Guide 41 2 42 Operation and Features Remote Voltage Sensing Output rating Output noise Stability The rated output voltage and current specifications in Chapter 7 apply at the output terminals of the power supply With remote sensing any voltage dropped in the loa
76. er 3 Remote Interface Reference lists the syntax for the SCPI Standard Commands for Programmable Instruments commands available to program the power supply All program examples have been tested on a PC with Windows 3 1 or Windows for Workgroups Both examples are for use with GPIB IEEE 488 These examples require a VISA Virtual Instrument Software Architecture driver with your GPIB PC card You should have the visa dll in your windows system directory for the GPIB examples to work All program examples perform the same task They step through voltages and make corresponding current readings to characterize a power diode 140 E3632A User s Guide Application Programs 5 Example Program for C GPIB IEEE 488 Example Program for C GPIB IEEE 488 Diode c Diode c This following C programming example shows sending and receiving formatted I O Refer to the VISA User s Guide for non formatted I O This example program is intended to show the use of SCPI commands and VISA functionality and does not include error trapping Error trapping however is good programming practice and is recommended in your application Refer to the VISA User s Guide for more information about error trapping The example program was written in Microsoft Visual C ver 1 52 project type QuickWin application using the large memory model Be sure to move the visa lib and visa h file to the lib and include development
77. er supply 6 Overview of the Power Supply Operation Overview of the Power Supply Operation 150 Series regulated power supplies were introduced many years ago and are still used extensively today The basic design technique which has not changed over the years consists of placing a control element in series with the rectifier and load device Figure 6 1 shows a simplified schematic of a series regulated supply with the series element depicted as a variable resistor Feedback control circuits continuously monitor the output and adjust the series resistance to maintain a constant output voltage Because the variable resistance of Figure 6 1 is actually one or more power transistor operating in the linear class A mode supplies with this type of regulator are often called linear power supplies Linear power supplies have many advantages and usually provide the simplest most effective means of satisfying high performance and low power requirements RECTIFIER Figure 6 1 Diagram of a simple series power supply with tap selection To keep the voltage across the series resistance low some supplies use preregulation before the rectifier bridge Figure 6 1 shows a controlled transformer tap as used in the Keysight E3632A This is one of several techniques using semiconductors for preregulation to reduce the power dissipated across the series element E3632A User s Guide Tutorial 6 Overview of the Power Supply Operation In terms
78. er supply Table 3 2 Keysight E3632A programming ranges 0 to 15 V 7 A range 0 to 30 V 4 A range Voltage Programming range 0 V to 15 45 V 0 V to 30 90 V MAX value 15 45 V 30 90 V MIN value OV DEFault value OV RST value OV Current Programming range 0 A to 7 21 A 0 A to 4 12 A MAX value 7 21 A 4 12 A MIN value 0A DEFault value 7A 4A RST value 7A 82 E3632A User s Guide Remote Interface Reference 3 Using the APPLy Command Using the APPLy Command The APPLy command provides the most straightforward method to program the power supply over the remote interface You can select the output voltage and current in one command APPLy lt voltage gt DEF MIN MAX lt current gt DEF MIN MAX This command is a combination of VOLTage and CURRent commands As long as the newly programmed values are within the presently selected range the output voltage and current are changed as soon as the command is executed The APPLy command changes the power supply s output to the newly programmed values only if the programmed values are valid within the presently selected range An execution error will occur if the programmed values are not valid within the selected range You can substitute MINimum MAXimum or DEFault in place of a specific value for the voltage and current parameters MIN selects the lowest values of 0 V and O A MAX selects the highest values allowed for the selected range The default values o
79. erify that you have received the following items in the shipment of your power supply If anything is missing or damaged contact your nearest Keysight Sales Office Y Power cord Y Certificate of Calibration Y E3632A User s Guide this manual Y E3632A Service Guide E3632 90010 Options OEM 0E3 and OE9 determine which power line voltage is selected at the factory The standard unit is configured for 115 Vac 10 47 Hz to 63 Hz input voltage For more information about changing the power line voltage setting refer to Power line voltage selection on page 14 Option Description OEM 115 Vac 10 47 Hz to 63 Hz input voltage OE3 230 Vac 10 47 Hz to 63 Hz input voltage OE9 100 Vac 10 47 Hz to 63 Hz input voltage 1CM Rack mount kit Keysight part number 5063 9243 OL2 Extra English manual set local language manual files are included in the CD ROM Keysight part number 5964 8251 E3632A User s Guide 1 1 Getting Started Standard Shipped Items Accessories The accessories listed below may be ordered from your local Keysight Sales Office either with the power supply or separately Table 1 2 E3632A accessories Part number Description 10833A GPIB cable 1 m 3 3 ft 10833B GPIB cable 2 m 6 6 ft 34398A e RS 232 9 pin f to 9 pin f 2 5 m 8 2 ft cable 9 pin f to 25 pin m adapter E3632A User s Guide Getting Started 1 Preparing the Power Supply Preparing the Po
80. es compliance with the Australia EMC Framework Cet appareil ISM est confomre a la norme NMB 001 du Canada ISM 12A Directives regulations under the terms of the Radio Communication Act of 1992 aaie This instrument complies with the LUE NABEUL indicates Car tnie RM WEEE Directive 2002 96 EC marking device complies with the Canadian requirement This affixed product label ICES NMB 001 ICES 001 i indicates that you must not discard this electrical or electronic product in domestic household waste The CSA mark is a registered trademark of the Canadian Standards Association 40 This symbol indicates the time period during which no hazardous or toxic substance elements are expected to leak or deteriorate during normal use Forty years is the expected useful life of the product This symbol is a South Korean Class A EMC Declaration This is a Class A instrument suitable for professional use and in electromagnetic environment outside of the home E3632A User s Guide Vil Waste Electrical and Electronic Equipment WEEE Directive 2002 96 EC This instrument complies with the WEEE Directive 2002 96 EC marking requirement This affixed product label indicates that you must not discard this electrical or electronic product in domestic household waste Product Category With reference to the equipment types in the WEEE directive Annex 1 this instrument is classified as a Monitori
81. evices including the computer is not more than 15 e The total length of all the cables used is not more than 2 m times the number of devices connected together up to a maximum of 20 m IEEE 488 states that you should exercise caution if your individual cable lengths exceed 4 m Do not stack more than three connector blocks together on any GPIB connector Make sure that all connectors are fully seated and that the lock screws are firmly finger tightened E3632A User s Guide Operation and Features 2 RS 232 Interface Configuration RS 232 Interface Configuration You connect the power supply to the RS 232 interface using the 9 pin DB 9 serial connector on the rear panel The power supply is configured as a DTE Data Terminal Equipment device For all communications over the RS 232 interface the power supply uses two handshake lines DTR Data Terminal Ready on pin 4 and DSR Data Set Ready on pin 6 The following sections contain information to help you use the power supply over the RS 232 interface The programming commands for RS 232 are explained in RS 232 Interface Commands on page 106 RS 232 configuration overview E3632A User s Guide Configure the RS 232 interface using the parameters shown below Use I O Config at the front panel to select the baud rate parity and number of data bits refer to To set the baud rate and parity RS 232 on page 54 for more information to configure from the front
82. f voltage and current are 0 V and 7 A regardless of the presently selected range For more details of parameters refer to Table 3 2 for each model If you specify only one parameter of the APPLy command the power supply regards it as the voltage setting value E3632A User s Guide 83 3 84 Remote Interface Reference Using the APPLy Command APPLy This command queries the power supply s present voltage and current setting values and returns a quoted string The voltage and current are returned in sequence as shown in the sample string below the quotation marks are returned as part of the string 15 00000 4 00000 In the above string the first number 15 00000 is the voltage setting value and the second number 4 00000 is the current setting value E3632A User s Guide Remote Interface Reference 3 Output Settings and Operation Commands Output Settings and Operation Commands This section describes low level commands used to program the power supply Although the APPLy command provides the most straightforward method to program the power supply the low level output setting commands give you more flexibility to change the individual parameters CURRent lt current gt MINimum MAXimum UP DOWN This command programs the immediate current level of the power supply The immediate level is the current value of the output terminals The CURRent command changes the output of the power supply to the newly prog
83. ffers are cleared e The power supply is prepared to accept a new command string e The following statement shows how to send a device clear over the GPIB interface using Keysight BASIC CLEAR 705 IEEE 488 device clear e The following statement shows how to send a device clear over the GPIB interface using the GPIB Command Library for C or QuickBASIC IOCLEAR 705 For RS 232 operation sending the lt Ctr1 C gt character will perform the same operation as the IEEE 488 device clear message The power supply s DTR data terminal ready handshake line is set true following a device clear message Refer to DTR DSR handshake protocol on page 60 for more information All remote interface configurations can be entered only from the front panel Refer to Storing and Recalling Operating States on page 33 to configure for GPIB or RS 232 interface before operating the power supply remotely E3632A User s Guide 121 3 Remote Interface Reference SCPI Conformance Information SCPI Conformance Information The power supply conforms to the 1995 0 version of the SCPI standard Many of the commands required by the standard are accepted by the power supply but are not described in this manual for simplicity or clarity Most of these non documented commands duplicate the functionality of a command already described in this manual SCPI confirmed commands Table 3 7 lists the SCPI confirmed commands that are used by the power su
84. g operation self test and calibration or enable the calibration mode the power supply must be unsecured before performing calibration Refer to the Service Guide E3632 90010 for more details on calibration 9 1 0 Configuration Secure key 3 Configure the power supply for remote interfaces or secure or unsecure the power supply for calibration Refer to the Service Guide E3632 90010 for more details on how to secure or unsecure the power supply 10 Output On Off key Enable or disable the power supply output This key toggles between on and off 11 Control knob Increase or decrease the value of the flashing digit by turning clockwise or counter clockwise 12 Resolution selection keys Move the flashing digit to the right or left 13 Voltage Current adjust selection key Select the knob control function for voltage or current adjustment 1 The key can be used as the Local key when the power supply is in the remote interface mode 2 You can enable the calibration mode by holding down this key when you turn on the power supply 3 You can use it as the Secure or Unsecure key when the power supply is in the calibration mode E3632A User s Guide 19 1 20 Getting Started Product at a Glance Voltage and current limit settings You can set the voltage and current limit values from the front panel using the following method Figure 1 3 Voltage and current limit settings 1 Select the desired range using the range selecti
85. ge is shown on the display the OCP annunciator flashes When it was caused by external voltage source such as a battery disconnect it first The following steps show how to clear the overcurrent conditions and get back to normal mode operation In the following steps the display will go back to OCP TRIPPED if you let the display time out after about several seconds 1 Readjust the OCP trip level or the output current level Lower the output current level below the OCP trip point after pressing by using the knob after pressing Display Limit or raise the OCP trip level Over Current 2 Move to the clear mode OCP ON You will see the above message after pressing If you changed the output voltage level Over Current press the Ove r Current twice Turn the knob to the right until the OCP CLEAR message appears on the display 3 Clear the overcoltage condition and exit this menu Now when you press Over Current message is displayed for a second and the OCP annunciator will not flash any more The output will return to met er mode Remote interface operation CURR PROT lt current gt MIN MAX CURR PROT STAT OFF ON CURR PROT CLE again the DONE Set the OCP level Disable or enable the OCP circuit Clear the tripped OCP circuit E3632A User s Guide Operation and Features 2 Remote Voltage Sensing Remote Voltage S
86. he calibration count feature can be performed from the remote interface only e The calibration count is stored in non volatile memory and does not change when power has been turned off or after a remote interface reset e The calibration count increments up to a maximum of 32767 after which it wraps around to 0 Since the value increments by one for each calibration point a complete calibration will increase the value by five counts 67 2 Operation and Features Calibration Remote interface operation CAL COUN Query the number of times of calibration Calibration message You can use the calibration message feature to record calibration information about your power supply For example you can store such information as the last calibration date the next calibration due date the power supply s serial number or even the name and phone number of the person to contact for a new calibration You can record and read information in the calibration message from the remote interface only e The power supply should be unsecured before sending a calibration message e The calibration message may contain up to 40 characters e The calibration message is stored in non volatile memory and does not change when power has been off or after a remote interface reset Remote interface operation CAL STR lt quoted string gt Store the cal message To store the calibration message send the following command CAL STR CAL 12
87. he constant current mode If you operate the power supply in the constant current CC mode verify that the CC annunciator is lit If the CV annunciator is lit choose a higher voltage limit During actual CC operation if a load change causes the voltage limit to be exceeded the power supply will automatically cross over to constant voltage mode at the preset voltage limit and the output current will drop proportionately Remote interface operation VOLTage lt voltage gt MIN MAX Set the voltage CURRent lt current gt MIN MAX Set the current OUTPut ON Enable the output 32 E3632A User s Guide Operation and Features 2 Storing and Recalling Operating States Storing and Recalling Operating States You can store up to three different operating states in non volatile memory This also enables you to recall the entire instrument configuration with just a few key presses from the front panel The memory locations are supplied with the reset states from the factory for front panel operation Refer to the description of RST on page 99 for more information The following steps show you how to store and recall an operating state Front panel operation E3632A User s Guide Store Storing the operating state 1 Set up the power supply for the desired operating state The storage feature remembers output range selection the limit value settings of voltage and current output on off state OVP a
88. he power supply wants to talk over the interface which means that it has processed a query and has received a lt new line gt message terminator it will set the DTR line FALSE This implies that once a query has been sent to the power supply the bus controller should read the response before attempting to send more data It also means that a lt new line gt must terminate the command string After the response has been output the power supply sets the DTR line TRUE again unless the first case see above prevents this The power supply monitors the DSR line to determine when the bus controller is ready to accept data over the interface The power supply monitors the DSR line pin 6 on the RS 232 connector before each character is sent The output is suspended if the DSR line is FALSE When the DSR line goes TRUE transmission will resume The power supply holds the DTR line FALSE while output is suspended A form of interface deadlock exists until the bus controller asserts the DSR line TRUE to allow the power supply to complete the transmission You can break the interface deadlock by sending the lt Ctrl C gt character which clears the operation in progress and discards pending output this is equivalent to the JEEE 488 device clear action For the lt Ctr C gt character to be recognized reliably by the power supply while it holds DTR FALSE the bus controller must first set DSR FALSE 61 2 62 Operation and Fe
89. he terminals or from the terminals to earth ground The actual power supply has finite noise across the output terminals and a finite current will flow through any impedance connected from either terminal to the earth ground or terminals from the earth ground The first is called normal mode voltage noise and the second common mode current noise E3632A User s Guide E3632A User s Guide Tutorial 6 Output Characteristics Normal mode voltage noise is in the form of ripple related to the line frequency plus some random noise Both of these are of very low value in the Keysight E3632A Careful lead layout and keeping the power supply circuitry away from power devices and other noise sources will keep these values low Common mode noise can be a problem for very sensitive circuitry that is referenced to earth ground When a circuit is referenced to earth ground a low level line related AC current will flow from the output terminals to earth ground Any impedance to earth ground will create a voltage drop equal to the current flow multiplied by the impedance To minimize this effect the output terminal can be grounded at the output terminal Alternatively any impedances to earth ground should have a complementary impedance to earth ground to cancel any generated voltages If the circuit is not referenced to earth ground common mode power line noise is typically not a problem The output will also change due to changes in the load As
90. holes inside the connector shell If you cannot find the correct cable for your configuration you may have to use a wiring adapter If you are using a DTE to DTE cable make sure the adapter is a straight through type Typical adapters include gender changers null modem adapters and DB 9 to DB 25 adapters 58 E3632A User s Guide Operation and Features 2 RS 232 Interface Configuration The cable and adapter diagrams shown below can be used to connect the power supply to most computers or terminals DB 9 serial connection If your computer or terminal has a 9 pin serial port with a male connector use the null modem cable included with the Keysight 34398A Cable Kit This cable has a 9 pin female connector on each end The cable pin diagram is shown in Figure 2 4 J 5182 4794 l Cabl Instrument iti PC DCD 1 1 DCD RX 2 2 RX TX 3 ma 3 TX DTR 4 4 DTR GND 5 5 GND DSR 6 6 DSR RTS 7 n 7 RTS CTS 8 8 CTS RI 9 9 RI DB9 DB9 DB9 DB9 Male Female Female Male Figure 2 4 DB 9 serial connection DB 25 serial connection If your computer or terminal has a 25 pin serial port with a male connector use the null modem cable and 25 pin adapter included with the Keysight 34398A Cable Kit The cable and adapter pin diagram are shown in Figure 2 5 E3632A User s Guide 59 2 Operation and Features RS 232 Interface Configuration 5182 4794 5181 6641 Cable f Adapter Instrument
91. ic value gt VOLTage LEVel MIN MID MAx VOLTage PROTection OUTPut RELay STATe OFF ON RELay STATE sySTem LOCal REMote RWLock 124 E3632A User s Guide Remote Interface Reference 3 IEEE 488 Conformance Information IEEE 488 Conformance Information Dedicated hardware lines ATN IFC REN SRO Addressed commands DCL EOI GET GTL LLO SDC SPD SPE E3632A User s Guide Attention Interface Clear Remote Enable Service Request Enable Device Clear End or Identify Group Execute Trigger Go to Local Local Lockout Selected Device Clear Serial Poll Disable Serial Poll Enable 125 3 126 Remote Interface Reference IEEE 488 Conformance Information IEEE 488 2 common commands CLS ESE lt enable value gt ESE ESR IDN OPC OPC Psc 0 1 PSC RST SAV 1 2 3 4 5 RCL 1 2 3 4 5 SRE lt enable value gt SRE STB TRG TST WAI E3632A User s Guide KEYSIGHT TECHNOLOGIES E3632A DC Power Supply User s Guide 4 Error Messages Overview 128 Execution Error Messages 130 Self Test Error Messages 135 Calibration Error Messages 137 This chapter lists the error messages that may appear as you are working with the power supply 4 Error Messages Overview Overview When the front panel ERROR annunciator turns on one or more command syntax or hardware errors have been detected A record of up to 20 errors is stored in
92. in perfectly constant in spite of any changes in output current demanded by the load Figure 6 3 Ideal constant voltage power supply Figure 6 4 Ideal constant current power supply 152 E3632A User s Guide Tutorial 6 Output Characteristics The ideal constant current power supply exhibits an infinite output impedance at all frequencies Thus as Figure 6 4 indicates the ideal constant current power supply would accommodate a load resistance change by altering its output voltage by just the amount necessary to maintain its output current at a constant value The output of the E3632A power supply can operate in either constant voltage CV mode or constant current CC mode Under certain fault conditions the power supply can not operate in either CV or CC mode and becomes unregulated Figure 6 5 shows the operating modes of the output of the Keysight E3632A power supply The operating point of one supply will be either above or below the line Rg Rg This line represents a load where the output voltage and the output current are equal to the voltage and current setting When the load R is greater than Rc the output voltage will dominate since the current will be less then the current setting The power supply is said to be in constant voltage mode The load at point 1 has a relatively high resistance value compared to Rc the output voltage is at the voltage setting and the output current is less than the current
93. ion on page 56 for more information on connecting the power supply to a computer over the GPIB interface 51 2 2 Operation and Features Remote Interface Configuration GPIB address Each device on the GPIB IEEE 488 interface must have a unique address You can set the power supply s address to any value between 0 and 30 The current address is displayed momentarily on the front panel when you turn on the power supply The address is set to 05 when the power supply is shipped from the factory The GPIB address can be set from the front panel only e The address is stored in non volatile memory and does not change when power has been off or after a remote interface reset e Your GPIB bus controller has its own address Be sure to avoid the bus controller s address for any instrument on the interface bus Keysight controllers generally use address 21 Baud rate selection RS 232 You can select one of six baud rates for RS 232 operation The rate is set to 9600 baud when the power supply is shipped from the factory The baud rate can be set from the front panel only e Select one of the following 300 600 1200 2400 4800 9600 baud The factory setting is 9600 baud e The baud rate selection is stored in non volatile memory and does not change when power has been off or after a remote interface reset 2 Refer to RS 232 Interface Configuration on page 57 for more information on connecting the powe
94. ion to this error more specific self test errors are also reported See also Self Test Error Messages on page 135 Queue overflow The error queue is full because more than 20 errors have occurred No additional errors are stored until you remove errors from the queue The error queue is cleared when power has been turned off or after a CLS clear status command has been executed Query INTERRUPTED A command was received which sends data to the output buffer but the output buffer contained data from a previous command the previous data is not overwritten The output buffer is cleared when power has been turned off or after a RST reset command has been executed Query UNTERMINATED The power supply was addressed to talk i e to send data over the interface but a command has not been received which sends data to the output buffer For example you may have executed an APPLy command which does not generate data and then attempted an ENTER statement to read data from the remote interface Query DEADLOCKED A command was received which generates too much data to fit in the output buffer and the input buffer is also full Command execution continues but all data is lost E3632A User s Guide 133 4 Error Messages Execution Error Messages Table 4 1 Execution error messages continued 440 501 502 503 511 512 513 514 521 522 550 Query UNTERMINATED after indefinite response The IDN command
95. ion 1CM 5063 9243 Installation instructions and hardware are included with each rack mounting kit Any Keysight System II instrument of the same size can be rack mounted beside the Keysight E3632A power supply 1 Remove the front and rear bumpers before rack mounting the power supply SE Agilent SRSA SE fo Se ao Cy Ge a Ps Gn BS AAAA LI 00000 J Protrusions Front Rear bottom view 2 To rack mount a single instrument order the adapter kit 5063 9243 SE Aue RRA EEO EWT ESEESE aN J N 16 E3632A User s Guide Getting Started 1 Preparing the Power Supply 3 To rack mount two instruments of the same depth side by side order the lock link kit 5061 9694 and rack mount kit 5063 9212 AAE CICESE 4 To install two instruments in a sliding support shelf order the support shelf 5063 9256 and the slide kit 1494 0015 E3632A User s Guide 17 1 Getting Started Product at a Glance Product at a Glance Front panel OY l RE Agilent Brow umr oot ADJUST IOOU0V 4OOOA Adre Rmt 16V 30V OCP CAL Limit ERROR Unreg FUNCTION Panga Y if D ta ead ee pe peer Voltage Current Umit
96. is detected during power on self test the power supply will beep twice This error is only readable from the remote interface RAM read write failed This test writes and reads a 55h and AAh checker board pattern to each address of RAM U14 Any incorrect readback will cause a test failure This error is only readable from the remote interface A D sync stuck The main controller issues an A D sync pulse to U17 and U18 to latch the value in the ADC slope counters A failure is detected when a sync interrupt is not recognized and subsequent time out occurs A D slope convergence failed The input amplifier is configured to the measure zero MZ state in the 10 V range This test checks whether the ADC integrator produces nominally the same number of positive and negative slope decisions 10 during a 20 ms interval Cannot calibrate rundown gain This test checks the nominal gain between integrating ADC and the U17 on chip ADC This error is reported if the procedure can not run to completion due to a hardware failure Rundown gain out of range This test checks the nominal gain between the integrating ADC and the U17 on chip ADC The nominal gain is checked to 10 tolerance Rundown too noisy This test checks the gain repeatability between the integrating ADC and the U17 on chip ADC The gain test 606 is performed eight times Gain noise must be less than 64 LSB of the U17 on chip ADC Serial configuration readback failed This test re send
97. ix Example TRIG DEL 0 5 SECS Suffix too long A suffix for a numeric parameter contained too many characters E3632A User s Guide 131 4 Error Messages Execution Error Messages Table 4 1 Execution error messages continued 138 141 144 148 151 158 160 to 168 170 to 178 211 213 Suffix not allowed A suffix was received following a numeric parameter which does not accept a suffix Example STAT QUES ENAB 18 SEC SEC is not a valid suffix Invalid character data Either the character data element contained an invalid character or the particular element received was not valid for the header Character data too long The character data element contained too many characters Character data not allowed A discrete parameter was received but a character string or a numeric parameter was expected Check the list of parameters to verify that you have used a valid parameter type Example DISP TEXT ON Invalid string data An invalid character string was received Check to see if you have enclosed the character string in single or double quotes Example DISP TEXT ON String data not allowed A character string was received but is not allowed for the command Check the list of parameters to verify that you have used a valid parameter type Example TRIG DEL zero Block data errors The power supply does not accept block data Expression errors The power
98. l keywords and TRIGgered is the third level keyword A colon separates a command keyword from a lower level keyword E3632A User s Guide Remote Interface Reference 3 Introduction to the SCPI Language Command format used in this manual E3632A User s Guide The format used to show commands in this manual is shown below CURRent lt current gt MINimum MAXimum UP DOWN The command syntax shows most commands and some parameters as a mixture of upper case and lower case letters The upper case letters indicate the abbreviated spelling for the command For shorter program lines send the abbreviated form For better program readability send the long form For example in the above syntax statement CURR and CURRENT are both acceptable forms You can use upper case or lower case letters Therefore CURRENT curr and Curr are all acceptable Other forms such as CUR and CURREN will generate an error Braces enclose the parameter choices for a given command string The braces are not sent with the command string A vertical bar separates multiple parameter choices for a given command string Triangle brackets lt gt indicate that you must specify a value for the enclosed parameter For example the above syntax statement shows the current parameter enclosed in triangle brackets The brackets are not sent with the command string You must specify a value for the parameter such as CURR 0 1 Some paramete
99. le lt enable value gt ENABle SYSTem ERRor CLS ESE lt enable value gt ESE ESR OPC OPC psc 0 1 PSC SRE lt enable value gt SRE STB WAL IEEE 488 Conformance Information CLS ESE lt enable value gt ESE ESR IDN OPC OPC psc 0 1 PSC RST SAV 1 2 3 RCL 1 2 3 SRE lt enable value gt SRE STB TRG TST WAL E3632A User s Guide 73 3 Remote Interface Reference Introduction to the SCPI Language Introduction to the SCPI Language 74 Standard Commands for Programmable Instruments SCPI is an ASCII based instrument command language designed for test and measurement instruments Refer to Simplified Programming Overview for an introduction to the basic techniques used to program the power supply over the remote interface SCPI commands are based on a hierarchical structure also known as a tree system In this system associated commands are grouped together under a common node or root thus forming subsystems A portion of the SOURce subsystem is shown below to illustrate the tree system SOURce CURRent lt current gt MIN MAX UP DOWN CURRent MIN MAX CURRent TRIGgered lt current gt MIN MAXx TRIGgered MIN MAX VOLTage lt voltage gt MIN MAX UP DOWN VOLTage MIN MAX VOLTage TRIGgered lt voltage gt MIN MAX TRIGgered MIN MAX SOURce is the root keyword of the command CURRent and VOLTage are second leve
100. ler using SRO 1 Send a device clear message to clear the power supply s output buffer for example CLEAR 705 Clear the event registers with the CLS clear status command Set up the enable register masks Execute the ESE command to set up the Standard Event register and the SRE command for the Status Byte Send the OPC operation complete query command and enter the result to ensure synchronization Enable your bus controller s IKEE 488 SRQ interrupt To determine when a command sequence is completed E3632A User s Guide 1 Send a device clear message to clear the power supply s output buffer for example CLEAR 705 Clear the event registers with the CLS clear status command Enable the Operation Complete bit bit 0 in the Standard Event register by executing the ESE 1 command Send the OPC operation complete query command and enter the result to ensure synchronization Execute your command string to program the desired configuration and then execute the OPC operation complete command as the last command When the command sequence is completed the Operation Complete bit bit 0 is set in the Standard Event register Use a serial poll to check when bit 5 Standard Event is set in the Status Byte summary register You could also configure the power supply for an SRQ interrupt by sending SRE 32 Status Byte Enable register bit 5 115 3 116 Remote Interface Refe
101. lt current gt MINimum MAXimum This command sets the current level at which the overcurrent protection OCP circuit will trip If the peak output current exceeds the OCP level then the output current is programmed to zero The Questionable Status register OC bit is set refer to SCPI status system on page 108 An overcurrent condition can be cleared with the CURR PROT CLE command after the condition that caused the OCP trip is removed CURRent PROTection MINimum MAXimum This query returns the overcurrent protection trip level presently programmed CURR PROT MAX and CURR PROT MIN return the maximum and minimum programmable overcurrent trip levels E3632A User s Guide 87 3 88 Remote Interface Reference Output Settings and Operation Commands CURRent PROTection STATe 0 1 OFF ON This command enables or disables the overcurrent protection function of the power supply An overcurrent condition can be cleared with the CURR PROT CLE command after the condition that caused the OCP trip is removed At RST this value is set to ON CURRent PROTection STATe This query returns the state of the overcurrent protection function The returned parameter is 0 OFF or 1 ON CURRent PROTection TRIPped This query returns a 1 if the overcurrent protection circuit is tripped and not cleared or a 0 if not tripped CURRent PROTection CLEar This command causes the overcurrent protection circuit to
102. lt voltage gt MIN MAX VOLTage LEVel TRIGgered AMPLitude MIN MAX VOLTage PROTection LEVel lt voltage gt MIN MAX VOLTage PROTection LEVel MIN MAX VOLTage PROTection STATe 0 1 OFF ON VOLTage PROTection STATe VOLTage PROTection TRIPped VOLTage PROTection CLEar VOLTage RANGe P15V P30V LOW HIGH VOLTage RANGe STATus QUEStionable CONDition QUEStionable EVENt QUEStionable ENABle lt enable value gt QUEStionable ENABle SYSTem BEEPer IMMediate ERRor VERSion TRIGger SEQuence DELay lt seconds gt MIN MAX SEQuence DELay SEQuence SOURce BUS IMM SEQuence SOURce E3632A User s Guide 123 3 Remote Interface Reference SCPI Conformance Information Device specific commands Table 3 8 Non SCPI commands The following commands are device specific to your power supply They are not included in the 1995 0 version of the SCPI standard However these commands are designed with the SCPI standard in mind and they follow all of the command syntax rules defined by the standard APPLy lt voltage gt DEF MIN MAX gt lt current gt DEF MIN MAX APPLy CALibration COUNt CURRent DATA lt numeric value gt CURRent LEVel MIN MID MAx CURRent PROTection DAC ERRor SECure CODE lt new code gt SECure STATe OFF ON lt code gt SECure STATe STRing lt quoted string gt STRing VOLTage DATA lt numer
103. ly is operating in CV mode in the 15 V 7 A range and controlled from the front panel then the CV and 15V annunciators will turn on If however the power supply is remotely controlled the Rmt annunciator will also turn on and when the power supply is being addressed over GPIB interface the Adrs annunciator will turn on Refer to Display annunciators on page 22 for more information E3632A User s Guide 27 2 Operation and Features Constant Voltage Operation Constant Voltage Operation To set up the power supply for constant voltage CV operation proceed as follows Front panel operation Power Display Limit 28 1 Connect a load to the output terminals With power off connect a load to the and output terminals 2 Turn on the power supply The power supply will go into the power on reset state the output is disabled the OFF annunciator turns on the 15 V 7 A range is selected the 15V annunciator turns on and the knob is selected for voltage control To operate the power supply in the 30 V 4 A range press 30V 4A before proceeding to the next step The 30V annunciator turns on 3 Set the display to the limit mode Notice that the Limit annunciator flashes indicating that the display is in the limit mode When the display is in the limit mode you can see the voltage and current limit values of the power supply In the constant voltage mode the volt
104. mand SendSCPI Volt amp Str Cells I 1 Request a current measurement put response in worksheet Cells I 2 Val SendSCPI meas current Next I SendSCPI Output OFF Turn off the output ClosePort End Sub E3632A User s Guide 145 5 5 Application Programs Example Program for Excel 5 0 Windows 3 1 and GPIB GPIB bas Macro Option Explicit Declarations for VISA DLL additional declarations are usually in the directory c vxipnp win include in file visa bas also see the VISA manual Declare Function viOpenDefaultRM Lib VISA DLL Alias 141 sesn As Long As Long Declare Function viOpen Lib VISA DLL Alias 131 ByVal sesn As Long _ ByVal desc As String ByVal mode As Long ByVal TimeOut As Long vi As Long As Long Declare Function viClose Lib VISA DLL Alias 132 ByVal vi As Long As Long Declare Function viRead Lib VISA DLL Alias 256 ByVal vi As Long _ ByVal Buffer As String ByVal Count As Long retCount As Long As Long Declare Function viWrite Lib VISA DLL Alias 257 ByVal vi As Long ByVal Buffer As String ByVal Count As Long retCount As Long As Long Error Codes and other global variables Global Const VI_SUCCESS amp h0 amp Global videfaultRM As Long resource manager id for VISA GPIB Global vi As Long stores the session for VISA Dim errorStatus As Long VTL error code This routine requires the file VISA dll It typically resides under the directory c
105. mber the third field is not used always 0 and the fourth field is a revision code which contains three numbers The first number is the firmware revision number for the main power supply processor the second is for the input output processor and the third is for the front panel processor The command returns a string with the following format be sure to dimension a string variable with at least 40 characters HEWLETT PACKARD E3632A 0 X X X X X X RST This command resets the power supply to its power on state as follows Table 3 3 Power supply state Command State CURR 7A CURR STEP 0 12 mA typical value CURR TRIG 7A CURR PROT 75A CURR PROT STAT ON DISP ON OUTP OFF OUTP REL OFF TRIG DEL 0 TRIG SOUR BUS 99 3 Remote Interface Reference System Related Commands Table 3 3 Power supply state continued Command State VOLT 0V VOLT STEP 0 55 mV typical value VOLT TRIG 0V VOLT PROT 32 V VOLT PROT STAT ON VOLT RANG P15V Low TST This query performs a complete self test of the power supply Returns 0 if the self test passes or 1 or any non zero value if it fails If the self test fails an error message is also generated with additional information on why the test has failed SAV 1 2 3 This command stores the present state of the power supply to the specified location in non volatile memory Three memory locations numbered 1 2 and 3 are available to
106. mmand programs the pending triggered voltage level The pending triggered voltage level is a stored value that is transferred to the output terminals when a trigger occurs A pending triggered level is not affected by subsequent VOLTage commands VOLTage TRIGgered MINimum MAXimum This query returns the triggered voltage level presently programmed If no triggered level is programmed the VOLT level is returned VOLT TRIG MAX and VOLT TRIG MIN return the highest and lowest programmable triggered voltage levels VOLTage PROTection lt voltage gt MINimum MAXimum This command sets the voltage level at which the overvoltage protection OVP circuit will trip If the peak output voltage exceeds the OVP level then the power supply output is shorted by an internal SCR The Questionable Status register OV bit is set refer to SCPI status system on page 108 An overvoltage condition can be cleared with the VOLT PROT CLE command after the condition that caused the OVP trip is removed E3632A User s Guide Remote Interface Reference 3 Output Settings and Operation Commands VOLTage PROTection MINimum MAXimum This query returns the overvoltage protection trip level presently programmed VOLT PROT MAX and VOLT PROT MIN return the maximum and minimum programmable overvoltage trip levels VOLTage PROTection STATe 0 1 OFF ON This command enables or disables the overvoltage protection function An overvoltag
107. mplete The OPC command sets the OPC bit bit 0 in the Standard Event register when the operation is complete Immediate triggering e To select the immediate trigger source send the following command TRIG SOUR IMM When IMMediate is selected as a trigger source an INITiate command immediately transfers the VOLT TRIG or CURR TRIG value to the VOLT or CURR value Any delay is ignored E3632A User s Guide Remote Interface Reference 3 Triggering Commands Triggering commands E3632A User s Guide INITiate Cause the trigger system to initiate This command completes one full trigger cycle when the trigger source is an immediate and initiates the trigger subsystem when the trigger source is bus TRIGger DELay lt seconds gt MINimum MAXimum Set the time delay between the detection of an event on the specified trigger source and the start of any corresponding trigger action on the power supply output Select from 0 to 3600 seconds MIN 0 seconds MAX 3600 seconds At RST this value is set to 0 seconds TRIGger DELay MINimum MAXimum This query returns the trigger delay TRIGger SOURce BUS IMMediate Select the source from which the power supply will accept a trigger The power supply will accept a bus software trigger or an internal immediate trigger At RST the bus trigger source is selected TRIGger SOURce This query returns the present trigger source Returns BUS or IMM TRG Gener
108. must be the last query command within a command string Example IDN SYST VERS Isolator UART framing error Isolator UART overrun error SPI data error Data error was detected during the communication between the main controller U10 and the 1 0 controller U752 RS 232 framing error RS 232 overrun error RS 232 parity error Command allowed only with RS 232 There are three commands which are only allowed with the RS 232 interface SyYSTem LOCal SYSTem REMote and SYSTem RWLock Input buffer overflow Output buffer overflow Command not allowed in local You should always execute the SYSTem REMote command before sending other commands over the RS 232 interface 1 This error message is only applicable for serial MY53xx6xxx 134 E3632A User s Guide ErrorMessages 4 Self Test Error Messages Self Test Error Messages The following errors indicate failures that may occur during a self test Refer to the Service Guide for more information Table 4 2 Self test error messages 601 602 603 604 605 606 607 608 Front panel does not respond The main controller U17 U10 for serial MY53xx6xxx attempts to establish serial communications with the front panel controller U7 U602 for serial MY53xx6xxx on the front panel board During this test the U7 U602 for serial MY53xx6xxx turns on all display segments Communication must function in both directions for this test to pass If this error
109. n error is generated if you do not use the colon and semicolon DISP TEXT CLE SOUR CURR MIN E3632A User s Guide Remote Interface Reference 3 Introduction to the SCPI Language Using the MIN and MAX parameters You can substitute MINimum or MAXimum in place of a parameter for many commands For example consider the following command CURRent lt current gt MIN MAX Instead of selecting a specific current you can substitute MINimum to set the current to its minimum value or MAXimum to set the current to its maximum value Querying parameter settings CAUTION You can query the value of most parameters by adding a question mark to the command For example the following command sets the output current to 5 A CURR 5 You can query the value by executing CURR You can also query the maximum or minimum value allowed with the present function as follows CURR MAX CURR MIN If you send two query commands without reading the response from the first and then attempt to read the second response you may receive some data from the first response followed by the complete second response To avoid this do not send a query command without reading the response When you cannot avoid this situation send a device clear before sending the second query command E3632A User s Guide 71 3 78 Remote Interface Reference Introduction to the SCPI Language SCPI command terminators A command string sent t
110. n for about one second To review the annunciators hold down Display Limit as you turn on the power supply The GPIB address or RS 232 message will then be displayed Jor about one second ADDR 5 or RS 232 The GPIB address is set to 5 when the power supply is shipped from the factory for remote interface configuration If this is not the first time the power supply is turned on a different interface RS 232 or a different GPIB address may appear Refer to Chapter 3 Remote Interface Reference if you need to change the remote interface configuration 3 The 15V OVP OCP and OFF annunciators are on All others are off The power supply will go into the power on reset state the output is disabled the OFF annunciator turns on the 15 V 7 A range is selected the 15V annunciator turns on and the knob is selected for voltage control Notice that the OVP and OCP annunciator also turn on 4 Enable the outputs Press Output On Off to enable the output The OFF annunciator turns off and the 15V OVP OCP and CV annunciators are lit The blinking digit can be adjusted by turning the knob Notice that the display is in the meter mode Meter mode means that the display shows the actual output voltage and current E3632A User s Guide Getting Started 1 Preparing the Power Supply If the power supply detects an error during power on self test the ERROR annunciator will turn on Refer
111. nd OCP on off state and OVP and OCP trip levels 2 Turn on the storage mode Three memory locations numbered 1 2 and 3 are available to store the operating states The operating states are stored in non volatile memory and are remembered when being recalled STORE 1 This message appears on the display for approximately three seconds 3 Select the storage location Turn the knob to the right to specify the memory location 3 STORE 3 33 2 Operation and Features Storing and Recalling Operating States Store Recall Cy XO Recall 34 To cancel the store operation let the display time out after about three seconds or press any other function key except Store The power supply returns to the normal operating mode and to the function pressed 4 Save the operating state The operating state is now stored DONE This message appears on the display for approximately 1 second Recalling a stored state 1 Turn on the recall mode Memory location 1 will be displayed in the recall mode RECALL 1 This message appears on the display for approximately three seconds 2 Recall the stored operating state Turn the knob to the right to change the displayed storage location to 3 RECALL 3 If this setting is not followed within three seconds with Recall the power supply returns to normal operating mode and will not recall the instrument state 3 from
112. nd the 15V or 30V OVP OCP and CV annunciators are lit Notice that the display is in the meter mode In the meter mode the display shows the actual output voltage and current Refer to Programming the Overvoltage Protection on page 35 and Programming the Overcurrent Protection on page 38 for more information on the OVP and OCP annunciators 8 Verify that the power supply is in the constant voltage mode If you operate the power supply in the constant voltage CV mode verify that the CV annunciator is lit If the CC annunciator is lit choose a higher current limit 1 You can use the resolution selection keys to move the flashing digit to the right or left when setting current 2 You can use the resolution selection keys to move the flashing digit to the right or left when setting voltage E3632A User s Guide 29 Operation and Features Constant Current Operation During actual CV operation if a load change causes the current limit to be exceeded the power supply will automatically cross over to the constant current mode at the preset current limit and the output voltage will drop proportionately Remote interface operation CURRent lt current gt MIN MAX Set the current VOLTage lt voltage gt MIN MAXx Set the voltage OUTPut ON Enable the output Constant Current Operation 30 Front panel operation Power To set up the power supply for constant current
113. nded protection circuit for battery charging 38 Remote voltage sensing connections 43 RS 232 data frame format 58 DB 9 serial connection 59 DB 25 serial connection 60 SCPI status system 108 Diagram of a simple series power supply with tap selection 150 Block diagram of the power supply showing the remote interface isolation 151 Ideal constant voltage power supply 152 Ideal constant current power supply 152 Output characteristics 153 Simplified diagram of the common mode and normal mode sources of noise 156 Regulated power supply with remote sensing 159 Speed of response programming up full load 164 Speed of response programming down 165 E3632A dimensions 168 XVII THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK XVIII E3632A User s Guide List of Tables E3632A User s Guide Table 1 1 Table 1 2 Table 1 3 Table 1 4 Table 1 5 Table 3 1 Table 3 2 Table 3 3 Table 3 4 Table 3 5 Table 3 6 Table 3 7 Table 3 8 Table 4 1 Table 4 2 Table 4 3 Table 6 1 Table 6 2 Table 7 1 Table 7 2 Table 7 3 E3632A options 7 E3632A accessories 8 Front panel overview 18 Rear panel overview 21 Display annunciators overview 22 SCPI command summary 71 Keysight E3632A programming ranges 82 Power supply state 99 Bit definitions Questionable Status register 109 Bit definitions Standard Event register 110 Bit definitions Status Byte summary register 112 SCPI confirmed commands 122 Non SCPI commands 124
114. nected to earth ground through a power source with a 3 wire ground receptacle Before installation or operation check the power supply and review this manual for safety markings and instructions Safety information for specific procedures is located at the appropriate places in this manual E3632A User s Guide V Safety and EMC Requirements This power supply is designed to comply with the following safety and Electromagnetic Compatibility EMC requirements Environmental Conditions 1EC61326 1 2005 EN61326 1 2006 Canada ICES NMB 001 Issue 4 June 2006 Australia New Zealand AS NZS CISPR11 2004 IEC 61010 1 2001 EN 61010 1 2001 Canada CAN CSA C22 2 No 61010 1 04 USA ANSI UL 61010 1 2004 This instrument is designed for indoor use and in an area with low condensation The table below shows the general environmental requirements for this instrument Environmental condition Requirements Operating condition e 0 C to 40 C full rated output Temperature Storage condition 20 C to 70 C Humidity Up to 80 RH Altitude Up to 2000 m Installation category II for indoor use Pollution degree 2 VI E3632A User s Guide Regulatory Markings CE The CE mark is a registered trademark of the European Community This CE mark shows that the product complies with all the relevant European Legal N10149 The C tick mark is a registered trademark of the Spectrum Management Agency of Australia This signifi
115. ng and Control Instrument product The affixed product label is as shown below Do not dispose in domestic household waste To return this unwanted instrument contact your nearest Keysight Service Center or visit www keysight com environment product for more information Vill E3632A User s Guide Declaration of Conformity DoC E3632A User s Guide The Declaration of Conformity DoC for this instrument is available on the Keysight Web site You can search the DoC by its product model or description at the Web address below http www keysight com go conformity If you are unable to search for the respective DoC contact your local Keysight representative THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK E3632A User s Guide Table of Contents E3632A User s Guide Getting Started Introduction 2 Standard Shipped Items 7 Options 7 Accessories 8 Preparing the Power Supply 9 Preliminary checkout 9 Power on checkout 10 Checking the output 11 Input power requirements 13 Rack mount the power supply 16 Product ata Glance 18 Frontpanel 18 Rearpanel 21 Display annunciators 22 Operating the Power Supply 24 Cooling 24 Bench operation 24 Cleaning 24 Operation and Features Overview 26 Constant Voltage Operation 28 Front panel operation 28 Remote interface operation 30 Constant Current Operation 30 Front panel operation 30 Remote interface operation 32 Xl XII Storing and Recalling Operating States
116. nguage You can also send engineering unit suffixes V A or SEC with numeric parameters If only specific numeric values are accepted the power supply will automatically round the input numeric parameters The following command uses a numeric parameter CURR lt current gt MIN MAX UP DoWwN Discrete parameters Discrete parameters are used to program settings that have a limited number of values such as BUS and IMM Query responses will always return the short form in all upper case letters The following command uses discrete parameters TRIG SOUR BUS IMM Boolean parameters Boolean parameters represent a single binary condition that is either true or false For a false condition the power supply will accept OFF or 0 For a true condition the power supply will accept ON or 1 When you query a boolean setting the power supply will always return 0 or 1 The following command uses a boolean parameter DISP OFF ON String parameters String parameters can contain virtually any set of ASCII characters A string must begin and end with matching quotes either with a single quote or with a double quote You can include the quote delimiter as part of the string by typing it twice without any characters in between The following command uses a string parameter DISP TEXT lt quoted string gt 79 3 Remote Interface Reference Simplified Programming Overview Simplified Programming Overview This section gives an over
117. o the power supply must terminate with a lt new line gt character The IEEE 488 EOI end or identify message is interpreted as a lt new line gt character and can be used to terminate a command string in place of a lt new line gt character A lt carriage return gt followed by a lt new line gt is also accepted Command string termination will always reset the current SCPI command path to the root level The lt new line gt character has the ASCII decimal code of 10 IEEE 488 2 common commands The JEEE 488 2 standard defines a set of common commands that perform functions like reset self test and status operations Common commands always begin with an asterisk are four to five characters in length and may include one or more parameters The command keyword is separated from the first parameter by a blank space Use a semicolon to separate multiple commands as shown below RST CLS ESE 32 OPC SCPI parameter types The SCPI language defines several different data formats to be used in program messages and response messages Numeric parameters Commands that require numeric parameters will accept all commonly used decimal representations of numbers including optional signs decimal points and scientific notation Special values for numeric parameters like MINimum MAXimum and DEFault are also accepted E3632A User s Guide E3632A User s Guide Remote Interface Reference 3 Introduction to the SCPI La
118. on WARNING To satisfy safety requirements load wires must be heavy enough not to overheat while carrying the short circuit output current of the power supply Remote voltage sensing Normally a power supply operating in the constant voltage mode achieves its optimum line and load regulations its lowest output impedance drift and ripple and noise and its fastest transient recovery performance at the power supply output terminals If the load is separated from the output terminals by any lead length some of these performance characteristics will be degraded at the load terminals usually by an amount proportional to the impedance of the load leads compared with the output impedance of the power supply 158 E3632A User s Guide Tutorial 6 Connecting the Load With remote voltage sensing a feature included in the Keysight E3632A power supply it is possible to connect the input of the voltage feedback amplifier directly to the load terminals so that the regulator performs its function with respect to the load terminals rather than with respect to the power supply output terminals Thus the voltage at the power supply output terminals shifts by whatever amount is necessary to compensate for the voltage drop in the load leads thereby maintaining the voltage at the load terminals constant Figure 6 7 Regulated power supply with remote sensing Load consideration Capacitive loading In most cases the power
119. on keys after turning on the power supply Press Display Limit to show the limit values on the display Move the blinking digit to the appropriate position using the resolution selection keys and change the blinking digit value to the desired voltage limit by turning the control knob If the display limit times out press Display Limit again Set the knob to current control mode using the voltage current adjust selection key Move the blinking digit to the appropriate position using the resolution selection keys and change the blinking digit value to the desired current limit by turning the control knob Press Output On Off to enable the output After about five seconds the display will go to output monitoring mode automatically to display the voltage and current at the output or the display will go to output monitoring mode immediately by pressing Display Limit again All the front panel keys and controls can be disabled with the remote interface commands The power supply must be in the Local mode for the front panel keys and controls to function E3632A User s Guide Getting Started 1 Product at a Glance Rear panel r EE Agilent SER OPT Mode In Korea e LR 85750 C ISM_1 A WARNING NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO SERVICE TRAINED IRE O GO
120. ou can have a high confidence that the power supply is operational If the complete self test is successful PASS is displayed on the front panel If the self test fails FAIL is displayed and the ERROR annunciator turns on See the Service Guide 3632 90010 for instructions on returning the power supply to Keysight for service Front panel operation The complete self test is enabled by pressing Recall actually any front panel keys except Error and the power line switch simultaneously and then continuing to press Recall for five seconds The complete self test will be finished in two seconds Remote interface operation TST Returns 0 if the complete self test passes or 1 if it fails E3632A User s Guide Operation and Features System Related Operations Error conditions E3632A User s Guide When the front panel ERROR annunciator turns on one or more command syntax or hardware errors have been detected A record of up to 20 errors can be stored in the power supply s error queue Refer to Chapter 4 Error Messages for more information e Errors are retrieved in first in first out FIFO order The first error returned is the first error that was stored When you have read all errors from the queue the ERROR annunciator turns off The power supply beeps once each time an error is generated e If more than 20 errors have occurred when you operate 2 the powe
121. ou can unsecure the power supply either from the front panel or over the remote interface The power supply is secured when shipped from the factory and the security code is set to HP003632 Front panel operation 1 Select the calibration mode SECURED If the power supply is secured you will see the above message for one second by holding Calibrate for five seconds when you turn on the power supply Enter the security code 000000 CODE To unsecure the power supply press Secure after the CAL MODE message is displayed in the calibration mode enter the security code using the knob and resolution selection keys and then press Secure Save the change and exit the menu UNSECURED When you press Secure to save the change you will see the message above for one second if the security code is correct The unsecured setting is stored in non volatile memory and does not change when power has been off or after a remote interface reset To exit the calibration mode turn the power off and on Notice that if you enter the wrong security code INVALID is displayed and the code entering mode is displayed for you to enter the correct code E3632A User s Guide Operation and Features 2 Calibration Remote interface operation CAL SEC STAT OFF ON lt code gt Secure or unsecure the power supply To unsecure the power supply send the above command with the same cod
122. pply Table 3 7 SCPI confirmed commands DISPlay WINDow STATe OFF ON WINDow STATe WINDow TEXT DATA lt quoted string gt WINDow TEXT DATA WINDow TEXT CLEar INITiate IMMediate MEASure CURRent DC VOLTage DC OUTPut STATe OFF ON STATE 122 E3632A User s Guide Remote Interface Reference 3 SCPI Conformance Information Table 3 7 SCPI confirmed commands continued SOURce CURRent LEVel IMMediate AMPLitude lt current gt MIN MAX UP DOWN CURRent LEVel IMMediate AMPLitude MIN MAX CURRent LEVel IMMediate STEP INCRement lt numeric value gt DEFault CURRent LEVel IMMediate STEP INCRement DEFault CURRent LEVel TRIGgered AMPLitude lt current gt MIN MAXx CURRent LEVel TRIGgered AMPLitude MIN MAX CURRent PROTection LEVel lt current gt MIN MAX CURRent PROTection LEVel MIN MAX CURRent PROTection STATe 0 1 OFF ON CURRent PROTection STATe CURRent PROTection TRIPped CURRent PROTection CLEar SOURce VOLTage LEVel IMMediate AMPLitude lt voltage gt MIN MAX UP DOWN VOLTage LEVel IMMediate AMPLitude MIN MAX VOLTage LEVel IMMediate STEP INCRement lt numeric value gt DEFault VOLTage LEVel IMMediate STEP INCRement DEFault VOLTage LEVel TRIGgered AMPLitude
123. protection The power supply automatically performs the calibration and stores the new overcurrent constant in non volatile memory Notice that current calibration precedes before sending this command CALibration DAC ERRor This command corrects the differential nonlinearity error of the internal DAC without an external meter You must send this command before calibrating the voltage It takes about 30 seconds to execute the command CALibration SECure CODE lt new code gt This command enters a new security code To change the security code first unsecure the power supply using the old security code Then enter the new code The calibration code may contain up to 12 characters over the remote interface but the first character must always be a letter CALibration SECure STATe OFF ON lt code gt This command unsecures or secures the power supply for calibration The calibration code may contain up to 12 characters over the remote interface 103 3 104 Remote Interface Reference Calibration Commands CALibration SECure STATe Query the secured state for calibration of the power supply The returned parameter is 0 OFF or 1 ON CALibration STRing lt quoted string gt This command records calibration information about your power supply For example you can store such information as the last calibration date the next calibration due date or the power supply s serial number The calibration message may contain
124. put capacitor To stay within the specifications for the output the current limit should be set greater than the peak current expected or the supply may go into CC mode or unregulated mode for brief periods E3632A User s Guide E3632A User s Guide Tutorial 6 Connecting the Load Reverse current loading An active load connected to the supply may actually deliver a reverse current to the supply during a portion of its operating cycle An external source can not be allowed to pump current into the supply without risking loss of regulation and possible damage These effects can be avoided by preloading the output with a dummy load resistor The dummy load resistor should draw at least the same amount of current from the supply as the active load may deliver to the supply The value of the current for the dummy load plus the value of the current the load draws from the supply must be less than the maximum current of the supply 161 6 Tutorial Extending the Voltage Range and Current Range Extending the Voltage Range and Current Range The power supply may be able to provide voltages and currents greater than its rated maximum outputs if the power line voltage is at or above its nominal value Operation can be extended up to 3 over the rated output without damage to the power supply but performance can not be guaranteed to meet specifications in this region If the power line voltage is maintained in the upper end of the input voltag
125. r supply over the remote interface the last error stored in the queue the most recent error is replaced with 350 Queue overflow No additional errors are stored until you remove errors from the queue If no errors have occurred when you read the error queue the power supply responds with 0 No error over the remote interface or NO ERRORS from the front panel e The error queue is cleared when power has been off or after a CLS clear status command has been executed The RST reset command does not clear the error queue Front panel operation If the ERROR annunciator is on press Error repeatedly to read the errors stored in the queue All errors are cleared when you read all errors ERROR 113 Remote interface operation SYST ERR Reads an error from the error queue Errors have the following format the error string may contain up to 80 characters 113 Undefined header 47 2 Operation and Features System Related Operations Display control For security reasons you may want to turn off the front panel display From the remote interface you can display a 12 character message on the front panel The display can be enabled disabled from the remote interface only e When the display is turned off outputs are not sent to the display and all annunciators are disabled except the ERROR annunciator Front panel operation is otherwise unaffected by turning off the display
126. r supply to a computer over the RS 232 interface 52 E3632A User s Guide Operation and Features 2 Remote Interface Configuration Parity selection RS 232 You can select the parity for RS 232 operation The power supply is configured for no parity and 8 data bits when shipped from the factory The parity can be set from the front panel only e Select one of the following None 8 data bits Even 7 data bits or Odd 7 data bits When you set the parity you are indirectly setting the number of data bits e The parity selection is stored in non volatile memory and does not change when power has been off or after a remote interface reset To set the GPIB address I O Config I O Config E3632A User s Guide To configure the power supply for the GPIB interface proceed as follows 1 Turn on the remote configuration mode HPIB 488 You will see the above message on the front panel display if the power supply has not been changed from the factory setting If RS 232 appears choose HPIB 488 by turning the knob to the right 2 Move to the GPIB address setting mode ADDR 05 The address is set to 05 when the power supply is shipped from the factory Notice that a different GPIB address may appear if the power supply has been changed from the factory setting 3 Turn the knob to change the GPIB address The displayed address is changed when turning the knob to the right or left 53 2
127. rammed value regardless of the output range presently selected You can substitute MINimum or MAXimum in place of a specific value for the current parameter MIN selects the lowest current values of 0 A MAX selects the highest current values allowed for the selected range This command also increases or decreases the immediate current level using the UP or DOWN parameter by a predetermined amount The command CURRent STEP sets the amount of increment and decrement Notice that a new increment setting will cause an execution error 222 Data out of range when the maximum or the minimum rated current is exceeded CURRent MINimum MAXimum This query returns the presently programmed current level of the power supply CURR MAX and CURR MIN return the highest and lowest programmable current levels for the selected range E3632A User s Guide 85 3 86 Remote Interface Reference Output Settings and Operation Commands CURRent STEP lt numeric value gt DEFault Set the step size for current programming with the CURRent UP and CURRent DOWN commands See the example as shown in Example on page 86 To set the step size to the minimum resolution set the step size to DEFault The minimum resolution of the step size is approximately 0 12 mA The CURR STEP DEF returns the minimum resolution of your instrument The immediate current level increases or decreases by the value of the step size For example the output current
128. rate the power supply you must unsecure it by entering the correct security code e The security code is set to HP003632 when the power supply is shipped from the factory The security code is stored in non volatile memory and does not change when power has been off or after a remote interface reset e To secure the power supply from the remote interface the security code may contain up to 12 alphanumeric characters as shown below The first character must be a letter but the remaining characters can be letters or numbers You do not have to use all 12 characters but the first character must always be a letter A te 12 characters e To secure the power supply from the remote interface so that it can be unsecured from the front panel use the eight character format shown below The first two characters must be H P and the remaining characters must be numbers Only the last six characters are recognized from the front panel but all eight characters are required To unsecure the power supply from the front panel omit the H P and enter the remaining numbers as shown on the following pages HP oo ai 8 characters E3632A User s Guide 63 2 64 Operation and Features If you forget your security code you can disable the security feature by adding a jumper inside the power supply and then entering a new code Refer to the Service Guide E3632 90010 for more information To unsecure for calibration Y
129. rcuit can in no way cause the series regulator transistors to conduct backwards the output capacitor can only be discharged through the load resistor and internal current source Ig The output voltage decays linearly with slope of Ig Cog with no load and stops falling when it reaches the new output voltage which has been demanded If full load is connected the output voltage will fall exponentially faster 165 6 Tutorial Reliability Reliability 166 Since up programming speed is aided by the conduction of the series regulating transistor while down programming normally has no active element aiding in the discharge of the output capacitor laboratory power supplies normally program upward more rapidly than downward Reliability of electronic semiconductor equipment depends heavily on the temperature of the components The lower the temperature of the components the better the reliability The Keysight E3632A incorporate circuitry to reduce the internal power dissipation of the power supply and therefore reduce the internal heat of the power supply Maximum internal power dissipation occurs at maximum current The internal power dissipation further increases as the output voltage is lowered A fan internal to the Keysight E3632A is essential to keep internal temperatures low To assist in cooling the Keysight E3632A the sides and rear of the Keysight E3632A should be kept clear E3632A User s Guide KEYSIGHT TECHNOLOGIES
130. rence SCPI Status Registers Using OPC to signal when data is in the output buffer Generally it is best to use the Operation Complete bit bit 0 in the Standard Event register to signal when a command sequence is completed This bit is set in the register after an OPC command has been executed If you send OPC after a command which loads a message in the power supply s output buffer query data you can use the Operation Complete bit to determine when the message is available However if too many messages are generated before the OPC command executes sequentially the output buffer will overload and the power supply will stop processing commands E3632A User s Guide Remote Interface Reference 3 Status Reporting Commands Status Reporting Commands Refer to SCPI status system on page 108 for detailed information of the status register structure of the power supply SYSTem ERRor This query command reads one error from the error queue When the front panel ERROR annunciator turns on one or more command syntax or hardware errors have been detected A record of up to 20 errors can be stored in the power supply s error queue Refer to Chapter 4 Error Messages for more details e Errors are retrieved in the first in first out FIFO order The first error returned is the first error that was stored When you have read all errors from the queue the ERROR annunciator turns off The power supply
131. responds to knob control for the 15 V 7 A range Set the knob to the current control and turn the knob clockwise or counter clockwise when the display is in the meter mode the Limit annunciator is off Check that the ammeter responds to knob control and the voltmeter indicates nearly zero the voltmeter will show the voltage drop caused by the test lead 6 Ensure that the current can be adjusted from zero to the full rated value If an error has been detected during the output checkout procedures the ERROR annunciator will turn on Refer to Chapter 4 Error Messages Input power requirements E3632A User s Guide You can operate your power supply from a nominal 100 V 115 V or 230 V single phase AC power source at 47 Hz to 63 Hz An indication on the rear panel shows the nominal input voltage set for the power supply at the factory If necessary you can change the power line voltage setting according to the instructions as shown in Power line voltage selection on page 14 Power line cord The power supply is shipped from the factory with a power line cord that has a plug appropriate for your location Contact the nearest Keysight Sales and Service Office if the wrong power line cord is included with your power supply Your power supply is equipped with a 3 wire grounding type power cord where the third conductor is the ground The power supply is grounded only when the power line cord is plugged into an appropriat
132. rs For example 16 is returned when you have queried the status of the questionable event register the temperature condition is questionable The Questionable Status Enable register is cleared when you execute the STAT QUES ENAB 0 command The Standard Event register The Standard Event register reports the following types of instrument events power on detected command syntax errors command execution errors self test or calibration errors query errors or when an OPC command is executed Any or all of these conditions can be reported in the Standard Event summary bit ESB bit 5 of the Status Byte register through the enable register To set the enable register mask you write a decimal value to the register using the ESE Event Status Enable command An error condition Standard Event register bit 2 3 4 or 5 will always record one or more errors in the power supply s error queue Read the error queue using the SYST ERR command Table 3 5 Bit definitions Standard Event register Bit Decimal value Definition 0 OPC 1 Operation complete All commands prior to and including an OPC command have been executed 1 Not Used 0 Always set to 0 2 QYE 4 Query Error The power supply tried to read the output buffer but it was empty Or a new command line was received before a previous query had been read Or both the input and output buffers are full 3 DDE 8 Device Error A self test or calibration error occurre
133. rs are enclosed in square brackets The brackets indicate that the parameter is optional and can be omitted The brackets are not sent with the command string If you do not specify a value for an optional parameter the power supply chooses a default value 75 3 76 Remote Interface Reference Introduction to the SCPI Language Some portions of commands are enclosed in square brackets The brackets indicate that this portion of the command is optional Most optional portions of the command are not shown in the command description For the full command showing all the options refer to Table 3 1 A colon separates a command keyword from a lower level keyword You must insert a blank space to separate a parameter from a command keyword If a command requires more than one parameter you must separate adjacent parameters using a comma as shown below SOURce CURRent TRIGgered APPLy 3 5 1 5 Command separators A colon is used to separate a command keyword from a lower level keyword as shown below SOURce CURRent TRIGgered A semicolon is used to separate two commands within the same subsystem and can also minimize typing For example sending the following command string SOUR VOLT MIN CURR MAX is the same as sending the following two commands SOUR VOLT MIN SOUR CURR MAX Use a colon and a semicolon to link commands from different subsystems For example in the following command string a
134. ry the power supply to determine which revision of firmware is installed for each microprocessor You can query the firmware revision from the remote interface only The power supply returns four fields separated by commas and the fourth field is a revision code which contains three numbers The first number is the firmware revision number for the main processor the second is for the input output processor and the third is for the front panel processor Remote interface operation IDN The above command returns a string in the form HEWLETT PACKARD E3632A 0 X X X X X X Be sure to dimension a string variable with at least 40 characters SCPI language version E3632A User s Guide The power supply complies with the rules and regulations of the present version of Standard Commands for Programmable Instruments SCPI You can determine the SCPI version with which the power supply is in compliance by sending a command from the remote interface 49 2 50 Operation and Features System Related Operations You can query the SCPI version from the remote interface only Remote interface operation SYST VERS Query the SCPI version Returns a string in the form of YYYY V where the Y represents the year of the version and the V represents the version number for that year for example 1995 0 E3632A User s Guide Operation and Features Remote Interface Configuration Remote Interface Configuration Before you can
135. s the last 3 bytes of serial configuration data to all the serial paths SERDAT SERBCK SERCLK The data is then clocked back into U18 and compared against the original 3 bytes sent A failure occurs if the data do not match This tests checks the serial data path through U22 E3632A User s Guide 135 4 Error Messages Self Test Error Messages Table 4 2 Self test error messages continued 609 624 625 626 630 631 632 This test checks if the ADC hardware is functional The main controller U10 establishes communication with the ADC and checks if there are any error bits set for the ADC s status reporting Unable to sense line frequency This test checks that the LSENSE logic input U17 is toggling If no logic input is detected the power supply will assume a 50 Hz line operation for all future measurements 1 0 processor does not respond This test checks that communications can be established between U17 U10 for serial MY53xx6xxx and U4 U752 for serial MY53xx6xxx through the isolated U6 and U7 U751 for serial MY53xx6xxx serial data link Failure to establish communication in either direction will generate an error If this condition is detected at power on self test the power supply will beep and the error annunciator will be turned on 1 0 processor failed self test This test causes the earth referenced processor U4 U752 for serial MY53xx6xxx to execute an internal ram test Failure will generate an error
136. store operating states of the power supply The state storage feature remembers the states or values of the following commands CURR CURR STEP CURR TRIG CURR PROT CURR PROT STAT DISP OUTP OUTP REL TRIG DEL TRIG SOUR VOLT VOLT STEP VOLT TRIG VOLT PROT VOLT PROT STAT and VOLT RANG To recall a stored state you must use the same memory location used previously to store the state 100 E3632A User s Guide Remote Interface Reference 3 System Related Commands RCL 1 2 3 This command recalls a previously stored state To recall a stored state you must use the same memory location used previously to store the state DISP OFF ON can be stored and recalled in remote interface mode only Going to local mode automatically sets the display state to ON E3632A User s Guide 101 3 Remote Interface Reference Calibration Commands Calibration Commands 102 Refer to Calibration on page 63 for an overview of the calibration features of the power supply For more detailed discussion on the calibration procedures refer to the Service Guide When you calibrate the power supply you should not set the OVP to the ON state in order to prevent OVP from tripping CALibration COUNt This command queries the power supply to determine the number of times it has been calibrated Your power supply was calibrated before it left the factory When you receive your power supply read the count to determine its ini
137. sult in personal injury or death Do not proceed beyond a WARN ING notice until the indicated conditions are fully understood and met E3632A User s Guide Safety Symbols The following symbols on the instrument and in the documentation indicate precautions which must be taken to maintain safe operation of the instrument Caution risk of danger refer to this manual for specific Warning or Caution information In position of a bi stable push control DC Direct current or voltage Terminal is at earth potential Used for measurement and control circuits designed to be operated with one terminal at earth potential AC Alternating current or voltage Positive binding post Protective conductor terminal Negative binding post D Out position of a bi stable push control Earth ground terminal E3632A User s Guide Safety Considerations Read the information below before using this instrument The following general safety precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards for design manufacture and intended use of the instrument Keysight Technologies assumes no liability for the customer s failure to comply with these requirements CAUTION e Use the device with the cables provided with the shipment e If
138. supply does not accept mathematical expressions Trigger ignored A Group Execute Trigger GET or TRG was received but the trigger was ignored The trigger source should be selected to the bus and the trigger subsystem should be initiated by the INIT IMM command Init ignored An INITiate command was received but could not be executed because a measurement was already in progress Send a device clear to halt a measurement in progress and place the power supply in the idle state 132 E3632A User s Guide ErrorMessages 4 Execution Error Messages Table 4 1 Execution error messages continued 221 222 223 224 330 350 410 420 430 Settings conflict Indicates that a legal program data element was parsed but could not be executed due to the current device state Data out of range A numeric parameter value is outside the valid range for the command Example TRIG DEL 3 Too much data A character string was received but could not be executed because the string length was more than 40 characters This error can be generated by the CALibration STRing command Illegal parameter value A discrete parameter was received which was not a valid choice for the command You may have used an invalid parameter choice Example DISP STAT XYZ XYZ is not a valid choice Self test failed The power supply s complete self test failed from the remote interface TST command In addit
139. supply will be stable for almost any size load capacitance Large load capacitors may cause ringing in the power supply s transient response It is possible that certain combinations of load capacitance equivalent series resistance and load lead inductance will result in instability If this occurs the problem may often be solved by either increasing or decreasing the total load capacitance E3632A User s Guide 159 160 Tutorial Connecting the Load A large load capacitor may cause the power supply to cross into CC or unregulated mode momentarily when the output voltage is reprogrammed The slew rate of the output voltage will be limited to the current setting divided by the total load capacitance internal and external Table 6 2 Slew rate Internal Internal bleed Slew rate at no load and capacitance resistor full scale current setting 470 uF 5 KQ 1 5 V ms Inductive loading Inductive loads present no loop stability problems in constant voltage mode In constant current mode inductive loads form a parallel resonance with the power supply s output capacitor Generally this will not affect the stability of the power supply but it may cause ringing of the current in the load Pulse loading In some applications the load current varies periodically from a minimum to a maximum value The constant current circuit limits the output current Some peak loading exceeding the current limit can be obtained due to the out
140. t the new calibration constants are not stored in the non volatile memory 716 Bad DAC DNL error correction data Invalid data measured during the calibration for DAC differential nonlinearity error correction 717 Cal OVP or OCP status enabled Overvoltage protection status or overcurrent protection status is enabled You must set both overvoltage and overcurrent protection status to OFF before and during the calibration 740 Cal checksum failed secure state 741 Cal checksum failed string data 742 Cal checksum failed store recall data in location 0 743 Cal checksum failed store recall data in location 1 744 Cal checksum failed store recall data in location 2 745 Cal checksum failed store recall data in location 3 746 Cal checksum failed DAC cal constants 747 Cal checksum failed readback cal constants 748 Cal checksum failed GPIB address 749 Cal checksum failed internal data 750 Cal checksum failed DAC DNL error correction data 138 E3632A User s Guide KEYSIGHT TECHNOLOGIES E3632A DC Power Supply User s Guide 5 Application Programs Overview 140 Example Program for C GPIB IEEE 488 141 Example Program for Excel 5 0 Windows 3 1 and GPIB 144 This chapter contains two application programs that utilize the remote interface 5 Application Programs Overview Overview This chapter contains two application programs over the remote interface to help you develop programs for your own application Chapt
141. terminals or 240 Vdc of ground when metal shorting bars without insulation are either replaced with insulated conductors or they are removed from the terminals so there is no operator access to the output conductors without insulation A chassis ground terminal is provided on the front panel for convenience Multiple loads E3632A User s Guide When connecting multiple loads to the power supply each load should be connected to the output terminals using separate connecting wires This minimizes mutual coupling effects between loads and takes full advantage of the low output impedance of the power supply Each pair of the wires should be as short as possible and twisted or shielded to reduce lead inductance and noise pick up If a shield is used connect one end to the power supply ground terminal and leave the other end disconnected If cabling considerations require the use of distribution terminals that are located remotely from the power supply connect output terminals to the distribution terminals by a pair of twisted or shielded wires Connect each load to the distribution terminals separately 157 6 Tutorial Connecting the Load Table 6 1 Wire rating AWG 10 12 14 16 18 20 22 24 26 28 Suggested 40 25 20 13 10 7 5 3 5 2 5 1 7 maximum Current amps mO ft 1 00 1 59 2 53 4 02 6 39 10 2 16 1 25 7 40 8 64 9 mQ m 3 3 5 2 8 3 13 2 21 0 33 5 52 8 84 3 133 9 212 9 1 Single conductor in gree air at 30 C with insulati
142. th load or CV and with a change in the output over 8 hours under constant load line and ambient temperature 3 Maximum time required for output voltage to settle within 1 of its total excursion for resistive load Excludes command processing time 4 During turn on or turn off of the AC power if the output control is set to less than 1 V If the output control is set to 1 V or higher there is no overshoot 172 E3632A User s Guide www keysight com Contact us To obtain service warranty or technical assistance contact us at the following phone or fax numbers United States tel 800 829 4444 fax 800 829 4433 Canada tel 877 8944414 fax 800 746 4866 China tel 800 8100189 fax 800 820 2816 Europe tel 31 20 547 2111 Japan tel 0120 421 345 fax 0120 421 678 Korea tel 080 769 0800 fax 080 769 0900 Latin America tel 305 269 7500 Taiwan tel 0800047 866 fax 0800 286 331 Other Asia Pacific Countries tel 65 6375 8100 fax 65 6755 0042 Or visit the Keysight World Wide Web at www keysight com find assist Product specifications and descriptions in this document are subject to change without notice Always refer to the English version at the Keysight Web site for the latest revision This information is subject to change without notice Keysight Technologies 1997 2014 Edition 7 November 2014 IAAI 3632 90001 KEYSIGHT www keysight com TECHNOL
143. the device is used in a manner not specified by the manufacturer the device protection may be impaired e Always use a dry cloth to clean the device Do not use ethyl alcohol or any other volatile liquid to clean the device Do not permit any blockage of the ventilation holes of the device IV E3632A User s Guide WARNING Do not use MAINS supply cords by inadequately RATED cord Always use the MAINS supply cord provided by the manufacturer Do not use the device if it appears damaged or defective REMOVE POWER and do not use the device until safe operation is verified by service trained personnel If necessary return the device to Keysight for service and repair to ensure that the safety features are maintained Do not operate the device around flammable gases or fumes vapor or wet environments Observe all markings on the device before connecting any wiring to the device e Turn off the output of the power supply before connecting to the output terminals When servicing the device use only the specified replacement parts e Do not install substitute parts or perform any unauthorized modification to the device Return the device to Keysight for service and repair to ensure that the safety features are maintained Do not operate the device with the cover removed or loosened This power supply is a Safety Class instrument which means that it has a protective earth terminal This terminal must be con
144. the power supply s error queue The power supply beeps once each time an error is generated e Errors are retrieved in first in first out FIFO order The first error returned is the first error that was stored When you have read all errors from the queue the ERROR annunciator turns off e If more than 20 errors have occurred the last error stored in the queue the most recent error is replaced with 350 Queue overflow No additional errors are stored until you remove errors from the queue If no erros have occurred when you read the error queue the supply responds with 0 No error over the remote interface or NO ERRORS from the front panel e The error queue is cleared when power has been off or after a CLS clear status command has been executed The RST reset command command does not clear the error queue Front panel operation If the ERROR annunciator is on press Error repeatedly to read the errors stored in the queue The error queue is cleared when you read all errors ERROR 113 128 E3632A User s Guide ErrorMessages 4 Overview Remote interface operation SYSTem ERRor Reads one error from the error queue Errors have the following format the error string may contain up to 80 characters 113 Undefined header E3632A User s Guide 129 4 Error Messages Execution Error Messages Execution Error Messages Table 4 1 Execution error messages 101
145. the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms the warranty terms in the separate agreement shall control Technology Licenses The hardware and or software described in this document are furnished under a license and may be used or copied only in accor dance with the terms of such license Restricted Rights Legend U S Government Restricted Rights Soft ware and technical data rights granted to the federal government include only those rights customarily provided to end user cus tomers Keysight provides this customary commercial license in Software and techni cal data pursuant to FAR 12 211 Technical Data and 12 212 Computer Software and for the Department of Defense DFARS 252 227 7015 Technical Data Commercial Items and DFARS 227 7202 3 Rights in Commercial Computer Software or Com puter Software Documentation Safety Notices CAUTION A CAUTION notice denotes a haz ard It calls attention to an operat ing procedure practice or the likes of that if not correctly performed or adhered to could result in dam age to the product or loss of impor tant data Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met A WARNING notice denotes a hazard It calls attention to an operating procedure practice or the likes of that if not correctly performed or adhered to could re
146. tial value Since the value increments by one for each calibration point a complete calibration will increase the value by five counts CALibration CURRent DATA lt numeric value gt This command can only be used after calibration is unsecured and the output state is ON It enters a current value that you obtained by reading an external meter You must first select the minimum calibration level CAL CURR LEV MIN for the value being entered You must then select the middle and maximum calibration levels CAL CURR LEV MID and CAL CURR LEV MAX for the value being entered Three successive values must be selected and entered The power supply then computes new calibration constants These constants are then stored in non volatile memory E3632A User s Guide E3632A User s Guide Remote Interface Reference 3 Calibration Commands CALibration CURRent LEVel MINimum MIDd1le MAXimum This command can only be used after calibration is unsecured and the output state is ON It sets the power supply to a calibration point that is entered with the CAL CURR command During calibration three points must be entered and the low end point MIN must be selected and entered first CALibration CURRent PROTection This command calibrates the overcurrent protection circuit of the power supply It takes about seven seconds to execute the command The calibration must be unsecured and the output shorted before calibrating the overcurrent
147. tion have various unwanted effects Provide secure and permanent connections Remote voltage sensing connections E3632A User s Guide Remote voltage sensing requires connecting the load leads from output terminals to the load and connecting the sense leads from sense terminals to the load as shown in Figure 2 2 Observe polarity when connecting the sensing leads to the load Notice that the metal shorting bars should be removed from the output and sense terminals for remote voltage sensing connections e For local voltage sensing connections the sense leads must be connected to the output terminals During remote sensing setup it is strongly recommended to power off by presssing the power ON OFF button the power supply to avoid undesirable damage to the load or the power supply POWER SUPPLY Figure 2 2 Remote voltage sensing connections 43 2 Operation and Features Disabling the Output Disabling the Output The output of the power supply can be disabled or enabled from the front panel e When the power supply is in the Off state the OFF annunciator turns on and the output is disabled The OFF annunciator turns off when the power supply returns to the On state When the output is disabled the voltage value is 0 V and the current value is 0 02 A e The output state is stored in volatile memory the output is always disabled when power has been off or after a remote interface reset While the ou
148. to Chapter 4 Error Messages Checking the output Power Output On Off E3632A User s Guide The following procedures check to ensure that the power supply develops its rated outputs and properly responds to operation from the front panel For complete performance and verification tests refer to the Service Guide E3632 90010 For each step use the keys shown on the left margins Voltage output check The following steps verify the basic voltage functions with no load 1 Turn on the power supply The power supply will go into the power on reset state the output is disabled the OFF annunciator turns on the 15 V 7 A range is selected the 15V annunciator turns on and the knob is selected for voltage control 2 Enable the outputs The OFF annunciator turns off and the 15V OVP OCP and CV annunciators are lit The blinking digit can be adjusted by turning the knob Notice that the display is in the meter mode Meter mode means that the display shows the actual output voltage and current 1 Getting Started Preparing the Power Supply Power Output On Off Display Limit O 12 3 Check that the front panel voltmeter properly responds to knob control for the 15 V 7 A range Turn the knob clockwise or counter clockwise to check that the voltmeter responds to knob control and the ammeter indicates nearly zero 4 Ensure that the volt
149. tput is disabled the range selection keys the control knob resolution selection keys and adjust selection key are still working If the display is in the meter mode you cannot see the changes of output voltage and current settings on the display when turning the knob To see or check the changes when the outputs are disabled the display should be in the limit mode Front panel operation You can disable the output by pressing Output On Off This key toggles between output Off and On states Remote interface operation OUTP OFF ON Disable or enable the output 44 E3632A User s Guide Operation and Features 2 Disabling the Output Disconnecting the output using an external relay When the output of the E3632A is turned off it is implemented by setting the output to 0 V and 0 02 A This gives a zero output voltage without actually disconnecting the output To disconnect the output an external relay must be connected between the output and the load A TTL signal of either low true or high true is provided to control an external relay This signal can only be controlled with the remote command OUTPut RELay OFF ON The TTL output is available on the RS 232 connection pin 1 and pin 9 When the OUTPut RELay state is ON the TTL output of pin 1 is high 4 5 V and pin 9 is low 0 5 V The levels are reversed when the OUTPut RELay state is OFF TTL output of pin 1 or pin 9 of the RS 232 connector is available only
150. ttings For example the following statements executed from your computer will read the power supply s error queue and print the most recent error dimension statement Dimension string array 80 elements SYST ERR Read the error queue bus enter statement Enter the error string into the computer print statement Print the error string Selecting a trigger source The power supply will accept a bus software trigger or an immediate internal trigger as a trigger source By default the BUS trigger source is selected If you want the power supply to use an immediate internal trigger you must select IMMediate For example the following statements executed from your computer will set to an output of 3 V 1 A immediately VOLT TRIG 3 0 Set the triggered voltage level to 3 0 V CURR TRIG 1 0 Set the triggered current level to 1 0 A TRIG SOUR IMM Select the immediate trigger as a source INIT Cause the trigger system to initiate E3632A User s Guide 81 3 Remote Interface Reference Simplified Programming Overview Power supply programming ranges The SOURce subsystem requires parameters for programming values The available programming value for a parameter varies according to the desired output range of the power supply Table 3 2 lists the programming values available and the MINimum MAXimum DEFault and reset values of your power supply Refer to Table 3 2 to identify the programming values when programming the pow
151. ut is less than desired and turns on the series regulator to its maximum value I the current limit or constant current setting This constant current Ij charges the output capacitor Co and load resistor Ry parallel The output therefore rises exponentially with a time constant R C towards voltage level I Ry a value higher than the new output voltage being programmed E3632A User s Guide E3632A User s Guide y Ji Tutorial 6 Remote Programming When this exponential rise reaches the newly programmed voltage level the constant voltage amplifier resumes its normal regulating action and holds the output constant Thus the rise time can be determined approximately using the formula shown in Figure 6 8 If no load resistor is attached to the power supply output terminal then the output voltage will rise linearly at a rate of Co l when programmed upward and Tr Co Eg EVI the shortest possible up programming time TC R Co a E INITIAL Eout E NEW Four E i E OUT TE PS Te FALL TIME Ri CoLOG i i T 2 ASYMPTOTIC LEVEL 0 EQUIVALENT CIRCUIT Hie tp NEW E our IS ACHIEVED FOR t lt I lt tz Peens H NEW Eour IS PROGRAMMED Figure 6 9 Speed of response programming down Figure 6 9 shows that when the power supply is programmed down the regulator senses that the output voltage is higher than desired and turns off the series transistors entirely Since the control ci
152. utput be opened before calibrating the overvoltage protection circuit The power supply automatically performs the calibration and stores the new overvoltage constant in non volatile memory Notice that voltage calibration precedes before sending this command E3632A User s Guide 105 3 Remote Interface Reference RS 232 Interface Commands RS 232 Interface Commands 106 Use the front panel 1 0 Config key to select the baud rate parity and the number of data bits see Remote Interface Configuration on page 51 SYSTem LOCal This command places the power supply in the local mode during RS 232 operation All keys on the front panel are fully functional SYSTem REMote This command places the power supply in the remote mode for RS 232 operation All keys on the front panel except the Local key are disabled It is very important that you send the SYST REM command to place the power supply in the remote mode Sending or receiving data over the RS 232 interface when not configured for remote operation can cause unpredictable results SYSTem RWLock This command places the power supply in the remote mode for RS 232 operation This command is the same as the SYST REM command except that all keys on the front panel are disabled including the Local key Ctrl C This command clears the operation in progress over the RS 232 interface and discards any pending output data This is equivalent to the IEEE 488 device cl
153. view of the basic techniques used to program the power supply over the remote interface This section is only an overview and does not give all of the details you will need to write your own application programs Refer to the remainder of this chapter and also Chapter 5 Application Programs for more details and examples Also refer to the programming reference manual that came with your computer for details on outputting command strings and entering data Using the APPLy command The APPLy command provides the most straightforward method to program the power supply over the remote interface For example the following statement executed from your computer will set the power supply to an output of 3 V rated at 1 A APPL 3 0 1 0 Using the low level commands Although the APPLy command provides the most straightforward method to program the power supply the low level commands give you more flexibility to change individual parameters For example the following statements executed from your computer will set the power supply to an output of 3 V rated at 1 A VOLT 3 0 Set the output voltage to 3 0 V CURR 1 0 Set the output current to 1 0 A 80 E3632A User s Guide Remote Interface Reference 3 Simplified Programming Overview Reading a query response Only the query commands commands that end with will instruct the power supply to send a response message Queries return either output values or internal instrument se
154. wer Supply Preliminary checkout E3632A User s Guide 1 Verify the power line voltage setting on the rear panel The power line voltage is set to the proper value for your country when the power supply is shipped from the factory Change the voltage setting if it is not correct The settings are 100 Vac 115 Vac or 230 Vac Verify that the correct power line fuse is installed The correct fuse is installed for your country when the power supply is shipped from the factory For 100 Vac or 115 Vac operation you must use a 4 AT fuse For 230 Vac operation you must use a 2 5 AT fuse Connect the power line cord and turn on your power supply The front panel display will light up and a power on self test occurs automatically when you turn on the power supply Refer to Power line voltage selection on page 14 if you need to change the power line voltage or the power line fuse To replace the 4 AT fuse order Keysight part number 2110 0996 To replace the 2 5 AT fuse order Keysight part number 2110 0999 1 10 Getting Started Preparing the Power Supply Power on checkout Output On Off The power on test includes an automatic self test that checks the internal microprocessors and allows the user visually check the display You will observe the following sequence on the display after pressing the front panel power switch to on 1 All segments of the display including all annunciators will turn o
155. will increase or decrease 10 mA if the step size is 0 01 This command is useful when you program the power supply to the allowed minimum resolution At RST the step size is the value of the minimum resolution CURRent STEP DEFault This query returns the value of the step size currently specified The returned parameter is a numeric value DEFault gives the minimum resolution of the step size in unit of amps Example The following program segments show how to use the CURR UP or CURR DOWN command to increase or decrease the output current with the CURR STEP command CURR STEP 0 01 Set the step size to 0 01 A CURR UP Increase the output current CURR STEP 0 02 Set the step size to 0 02 A CURR DOWN Decrease the output current E3632A User s Guide Remote Interface Reference 3 Output Settings and Operation Commands CURRent TRIGgered lt current gt MINimum MAXimum This command programs the pending triggered current level The pending triggered current level is a stored value that is transferred to the output terminals when a trigger occurs A pending triggered level is not affected by subsequent CURRent commands CURRent TRIGgered MINimum MAXimum This query returns the triggered current level presently programmed If no triggered level is programmed the CURRent level is returned CURR TRIG MAX and CURR TRIG MIN return the highest and lowest programmable triggered current levels CURRent PROTection
156. windows system This routine uses the VTL Library to send commands to an instrument A description of these and additional VTL commands are contained in the Hewlett Packard Visa Transition Library book Keysight PN E2094 90002 Function SendSCPI SCPICmd As String As String This function will send a SCPI command string to the GPIB port If the command contains a question mark the response is read and returned Dim readbuf As String 512 buffer used for returned string Dim crlfpos As Integer location of CR s and LF s in readbuf Dim cmdString As String command passed to instrument Dim ReturnString As String string returned from instrument Dim actual As Long number of characters send returned Set up an error handler within this subroutine that will get called if an error occurs On Error GoTo VIerrorHandler Write the command to the instrument terminated by a linefeed emdstring SCPICmd amp Chr 10 errorStatus viWrite vi ByVal commandstr Len commandstr actual 146 E3632A User s Guide Application Programs Example Program for Excel 5 0 Windows 3 1 and GPIB If InStr SCPICmd Then If a query read the response string errorStatus viRead vi ByVal readbuf 512 actual ReturnString readbuf Strip out any nul s from the response string crlfpos InStr ReturnString Chr 0 If crlfpos Then ReturnString Left ReturnString crlfpos 1 End If SendSCPI ReturnString return th
157. y pressing Local if you did not previously send the front panel lockout command A change between front panel and remote operation modes will not result in a change in the output parameters e The power supply has two output ranges of 15 V 7 A or 30 V 4 A This feature allows more voltage at a lower current or more current at a lower voltage The desired output range is selected from the front panel or over the remote interfaces The 15V or 30V annunciator indicates the presently selected range e When you press Display Limit the Limit annunciator flashes the display of the power supply goes to the limit mode and the present limit values will be displayed In this mode you can also observe the change of the limit values when adjusting the knob If you press Display Limit again or let the display time out after several seconds the power supply will return the display to the meter mode the Limit annunciator turns off In this mode the actual output voltage and current will be displayed e The output of the power supply can be enabled or disabled from the front panel using Output On off When the output is off the OFF annunciator turns on and the output is disabled 26 E3632A User s Guide Operation and Features 2 Overview e The display provides the present operating status of the power supply with annunciators and also informs the user of error codes For example the power supp

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