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N6700 User's Guide

1. Output connector 8 pin digital control USB connector LAN connector Includes output and connector 10 100 Base T sense terminals Connector function is Left LED indicates user configurable activity Right LED indicates link integrity SHOCK HAZARD The power cord provides a chassis ground through a third conductor Be certain that your power outlet is of the three conductor type with the correct pin connected to earth ground Series N6700 User s Guide 11 1 Quick Reference Front Panel Display At a Glance 12 Single channel view Press the Meter key to toggle between views Voltage Bar indicates output Current measurement polarity is reversed measurement x f D 0 1 89A ease eege WE Operating status Voltage and Interface status CV constant voltage current settings l0 activity on interface Multiple channel view Press the Meter key to toggle between views Voltage and Current measurements 12 523 10 234V 3 000 0 000 O 179A O 341A O 200A O 000A Bec feo eo The highlighted channel is the active channel Grouped channel view Refer to Chapter 4 under System Related Operations for more information Channels 2 through 4 are connected in parallel and have been configured or grouped to act as a single higher power channel Pee 1 7 573
2. N6731B w relays 1 58 10 N6751A 2 25 20 N6751A w relays 3 51 30 N6761A 4 32 40 0 20 30 40 50 60 70 80 90 milliseconds ON internal delay offset programmed turn on delay To synchronize power modules with different minimum delay offsets as shown above you can specify a common delay offset parameter Series N6700 User s Guide Output On Off Synchronization Appendix D By setting the common delay offset to be greater than or equal to the largest minimum delay offset you can synchronize the programmed turn on delays as shown in the following example N6731B wirelays 1 60 10 N6751A 2 60 20 N6751A wirelays 3 60 30 N6761A 4 60 40 0 20 30 40 50 60 70 80 99 100 Miliseconds on 60 me common delay offset Since there will be an additional delay due to the common delay offset you will need to account for the additional delay time As shown in the previous example if you program a common delay of 60 ms and user programmed delays of 10 ms 20 ms 30 ms and 40 ms for output channels 1 through 4 the actual output delays from the on event will be 70 ms 80 ms 90 ms and 100 ms respectively Even though this 60 ms delay offset will be seen on all outputs the additional delay time will not affect most applications because the relative delay times between output module turn on will sti
3. WITH REMOTE SENSING Series N6700 User s Guide Installation 2 Grouping the Outputs Once outputs have been connected in parallel they can be configured or grouped to act as a single higher power channel This applies when programming via the front panel or using SCPI commands How to group output channels that have been connected in parallel is discussed in Chapter 4 under System Related Operations If you are not grouping output channels first program both outputs to the desired output voltage Then program the current limit point of each output The current limit of the paralleled outputs will be the sum of both individual current limit points Effect on Specifications Current Voltage Load Transient Recovery Time Series N6700 User s Guide Specifications for outputs operating in parallel can be obtained from the specifications for single outputs Most specifications are expressed as a constant or as a percentage or ppm plus a constant For parallel operation the percentage portion remains unchanged while constant portions or any constants are changed as indicated below For current readback accuracy and temperature coefficient of current readback use the minus current specifications All parallel specifications referring to current are twice the single output specification except for programming resolution which is the same for both single output and parallel ou
4. TWIST LEADS Note that Agilent Models N678xA require remote sensing when using any of the High output bandwidth modes discussed in Chapter 4 Also these models have additional wiring restrictions as discussed under Agilent N678xA Wiring Requirements CAUTION When remote sensing on power modules with the 50A sense connector do not connect the LS and LS terminals These are dedicated for local sensing only 34 Series N6700 User s Guide Installation 2 Open Sense Leads The sense leads are part of the output s feedback path Connect them in such a way so that they do not inadvertently become open circuited The power system includes protection resistors that reduce the effect of open sense leads during remote sensing operation If the sense leads open during operation the power system returns to the local sensing mode with the voltage at the output terminals approximately 1 higher than the programmed value Over voltage Protection Considerations The OVP circuit senses at the main output terminals and not through the sense terminals Due to the voltage drop in the load leads the voltage sensed by the OVP circuit could be higher than the voltage being regulated at the load Therefore you must take into account the additional voltage drop in the load leads when setting the over voltage trip point Note that for Agilent Models N678xA only the OVP circuit senses at the 4 wire sense terminals
5. SCPI Command Enter the selected channel s in the command s parameter list OUTP STAT 1 2 SCPI Command To set output 1 to 5 V VOLT 5 1 To set all outputs to 10 V VOLT 10 1 4 For models with multiple ranges you can select a lower range if you need better output resolution Front Panel Press the Voltage key Select a lower range and press Select SCPI Command To select the lower range program a value that falls within the range VOLT RANG 5 1 For Agilent N678xA models operating in current priority mode you can specify a Voltage limit which limits the output voltage at the specified value In current priority mode the output current remains at its programmed setting as long as the output voltage is within the positive or negative limit Check Tracking to let the negative voltage limit track the positive voltage limit setting SCPI Command To select the voltage limit VOLT LIM 5 1 To select the negative voltage limit VOLT LIM NEG 3 1 To enable voltage limit tracking VOLT LIM COUP ON RI Front Panel Press the Voltage key Specify a Voltage limit and or a Voltage limit and press Select Check the Tracking box if you want the limit to track the limit Series N6700 User s Guide Operating the Power System 4 Set the Output Current Front Panel SCPI Command Press the Current key To set output 1 to 1 A CURR 1 1
6. II Il II IN Connect to GPIB Interface Connect to GPIB Card installed in PC port on instrument 1 Instrument Instrument If you have not already done so install the Agilent IO Libraries Suite from the Automation Ready CD that is shipped with your product If you do not have a GPIB interface card installed on your computer turn off your computer and install the GPIB card Connect your instrument to the GPIB interface card using a GPIB interface cable Use the Connection Expert utility of the Agilent IO Libraries Suite to configure the installed GPIB interface card s parameters The power system is shipped with its GPIB address set to 5 Use the front panel menu if you need to change the GPIB address a Press the Menu key then use the navigation keys to select System IO GPIB b Use the numeric keys to enter a new value Valid addresses are from 0 to 30 Press the Enter key to enter the value Press the Meter key to exit the menu Series N6700 User s Guide USB Interface Getting Started 3 6 You can now use Interactive IO within the Connection Expert to communicate with your instrument or you can program your instrument using the various programming environments For detailed information about USB interface connections refer to the Agilent Technologies USB LAN GPIB Interfaces Connectivity Guide located on the Automation Ready CD that is shipped with your product LAN Inte
7. Sets the negative current limit only on N678xA Series N6700 User s Guide SCPI Command SOURce CURRent continued MODE FiXed STEP LIST chanlist PROTection DELay TIME lt NRf gt chanlist STARt SCHange CCTRans chanlist STATe lt Bool gt chanlist RANGe lt NRf gt chanlist SLEW IMMediate lt NRf gt INFinity chanlist MAXimum lt Bool gt chanlist DIGital INPut DATA OUTPut DATA lt NRf gt PIN lt 1 7 gt FUNCtion DIO DINPut TOUTput TINPut FAULt INHibit ONCouple OFFCouple POLarity POSitive NEGative TOUTput BUS ENABle lt Bool gt FUNction CURRent VOLTage chanlist LIST COUNt lt NRf gt INFinity chanlist CURRent LEVel lt NRf gt lt NRf gt chanlist POINts chanlist DWELI lt NRf gt lt NRf gt chanlist POINts chanlist STEP ONCE AUTO chanlist TERMinate LAST lt Bool gt chanlist TOUTput BOSTep DATA lt Bool gt lt Bool gt chanlist POINts chanlist EOSTep DATA lt Bool gt lt Bool gt chanlist POINts chanlist VOLTage LEVel lt NRf gt lt NRf gt chanlist POINts chanlist POWer LIMit lt NRf gt chanlist RESistance LEVel IMMediate AMPLitude lt NRf gt chanlist STATe lt Bool gt chanlist STEP TOUTput lt Bool gt chanlist VOLTage LEVel IMMediate AMPLitude lt NRf gt chanlist
8. 10 234V 0 179A 2 391A Grouped channels are addressed using the channel number of the lowest channel in the group Double wide view Interface status indicators Channel 2 is a double wide power module that occupies two channel locations in the mainframe A 12 523 10 234V 0 000 0 179A 40 341A 0 000A Err an error has occurred press Error key to display error message Lan the LAN is connected and has been configured 10 there is activity on one of the remote interfaces Series N6700 User s Guide Operating status indicators Quick Reference 1 OFF the output is off CV the output is in constant voltage mode CC the output is in constant current mode CP the output is limited or disabled by the positive power limit CP the output is limited or disabled by the negative power limit VL the output is in positive or negative voltage limit mode CL the output is in positive or negative current limit mode OV the output is disabled by the over voltage protection OV the output is disabled by the negative over voltage protection OC the output is disabled by the over current protection OT the over temperature protection has tripped PF the output is disabled by a power fail condition OSC the output is disabled by the oscillation protection INH the output is disabled by an external inhibit signal UNR the output is unregulated PROT the output is disabled by a condit
9. Agile 00010 oso ernet Explorer provided by Ag olog 2 0 xj File Edit Favorites Tools Help Address http y a n6700b 00101 O O O O OOOO deal QO bDAlQ E GB 3A a Links customize Links windows JAgient beAgient vahoo Support Agilent Site Another web enabled instrument from Agilent Technologies Welcome to your Low Profile MPS Mainframe instrumen N6700B Low Profile MPS Mainframe MY43000101 Agilent N6700B MY43000101 A N6700B 00101 usa agilent com IP Addres 141 121 202 235 VISA TCPIP Connect String TCPIPO A N6700B 00101 INSTR ring Turn On Front Panel Identification Indicator Advanced Information Use the navigation bar on the leftto access your Low Profile MPS Mainframe and related information Click the Web Control button in the navigation bar on the leftto startthe application Agilent Technologies Inc 2003 Series N6700 User s Guide 55 3 Getting Started 56 Using Telnet Using Sockets 3 Click on the Browser Web Control button in the navigation bar on the left to begin controlling your instrument 4 For additional help about any of the pages click on the Help with this Page button If desired you can control access to the Web server using password protection As shipped from the factory no password is set To set a password click on the View amp Modify Configuration button Refer to the on line help for additional information about setting
10. Step 3 Determine the time interval in seconds that the output remains at each step in the list before it advances to the next step To specify the six dwell intervals in the figure a list may include the following values 2 3 5 3 7 3 Front Panel SCPI Command Select Transient List Config To program output 1 use LIST DWEL 2 3 5 3 7 3 1 Select the List Step number and enter a dwell value Press Select Repeat this for each step Use the t keys to select the next step The number of dwell steps must equal the number of voltage steps If a dwell list has only one value that value will be applied to all steps in the list Step 4 Determine how the list is paced To pace the list by dwell time set the list pacing to Dwell paced on the front panel menu Set the LIST STEP command to AUTO As each dwell time elapses the next step is immediately output Series N6700 User s Guide 73 4 Operating the Power System Step 5 SCPI Command LIST STEP AUTO Front Panel Select Transient List Pace 1 Select Dwell paced Press Select In a trigger paced list the list advances one step for each trigger received To enable trigger paced lists select Trigger paced on the front panel menu Set the LIST STEP command to ONCE The dwell time associated with each step determines the minimum time that the output remains at the step If a trigger is received before the dwell time completes the
11. TRIGgered AMPLitude lt NRf gt chanlist Series N6700 User s Guide Quick Reference 1 Description Sets the current trigger mode Sets the over current protection programming delay Sets the over current protection programming mode Enables disables over current protection on the selected output Sets the output current range Sets the output current slew rate only N678xA Enables disables the maximum slew rate override only N678xA Reads the state of the digital port pins Sets the digital port Sets the selected pin s function Sets the selected pin s polarity Enables disables BUS generated triggers on digital pins Specifies current priority or voltage priority mode only N678xA List commands only on N676xA N678xA and Option 054 Sets the list repeat count Sets the current list Returns the number of current list points Sets the list of dwell times Returns the number of dwell list points Specifies how the list responds to triggers Sets the list termination mode Generate triggers at the Beginning Of Step Returns the number of beginning of step list points Generate triggers at the End Of Step Returns the number of end of step list points Sets the voltage list Returns the number of voltage level points Sets the power limit on output channels Sets the output resistance only on N6781A Enables disables output resistance programming only N6781A Generate a trigger output on the voltage or current s
12. The following information only applies to Agilent Model N6781A The Agilent N6781A has an auxiliary voltage measurement input whose primary use is for battery voltage rundown measurements It may also be suitable for other applications including general purpose DC voltage measurements between 25 VDC The auxiliary voltage measurement input is isolated from other commons It has a bandwidth of about 2 kHz It has one input range 25 to 25 VDC Auxiliary voltage measurements cannot be made along with output voltage measurements When the auxiliary voltage measurement input is selected the voltage measurement input will be switched to the Aux Voltage inputs on the Agilent N6781A instead of the normal and sense terminals To enable auxiliary voltage measurements Front Panel SCPI Command Select Measure Input To enable auxiliary measurements Select Auxiliary and press Select SENS FUNC VOLT INP AUX 1 Select Main to reconnect the Take the auxiliary voltage measurement voltage measurement input to MEAS VOLT 1 the output terminals When the auxiliary voltage measurement terminals are left unconnected the front panel meter will indicate a voltage reading of approximately 1 6V This is a normal indication which does not affect the voltage measurement once the auxiliary measurement terminals are connected 76 Series N6700 User s Guide Using the Digitizer Operating the Power System 4 The Digitizer f
13. 1 mA 16 5 VDC Maximum low level output voltage 0 5 V 4 mA 1V 50 mA 1 75 V 100 mA Maximum low level sink current 100 mA Typical high level leakage current 0 8 mA 16 5 VDC Maximum low level input voltage 0 8 V Minimum high level input voltage 2 V Typical low level current 2 mA 0 V internal 2 2k pull up Typical high level leakage current 0 12 mA 16 5 VDC Interface Capabilities GPIB LXI Compliance USB 2 0 10 100 LAN Built in Web server SCPI 1993 IEEE 488 2 compliant interface Class C only applies to units with LXI label on front panel Requires Agilent 10 Library version M 01 01 or 14 0 and up Requires Agilent 10 Library version L 01 01 or 14 0 and up Requires Internet Explorer 5 or Netscape 6 2 Regulatory Compliance EMC Safety Complies with European EMC Directive for test and measurement products e IEC EN 61326 1 e CISPR Pub 11 Group 1 class A e AS NZS CISPR 11 e ICES NMB 001 Complies with Australian standard and carries C Tick mark This ISM device complies with Canadian ICES 001 Cet appareil ISM est conforme la norme NMB 001 du Canada Complies with European Low Voltage Directive and carries the CE marking Conforms to UL 61010 1 and CSA C22 2 61010 1 Series N6700 User s Guide Series N6700 User s Guide Specifications Appendix A Supplemental Characteristics continued N6700B N6701A N6702A Environmental Conditions Operating en
14. SCPI Command To program the output 1 list to repeat 2 times use LIST COUN 2 Front Panel Select the Transient List Repeat Enter the number of list repetitions 2 and Press Select 1 Select a trigger source initiate and trigger the list This is described in detail under Synchronizing Output Steps Series N6700 User s Guide Making Measurements Operating the Power System 4 Each output channel has its own measurement capability The output voltage and current is measured by acquiring a number of samples at the selected time interval applying a window function to the samples and averaging the samples The power on and RST time interval and number of samples settings yield a measurement time of 21 milliseconds per reading 1024 data points at 20 48 us intervals The output windowing function is Rectangular Use the following commands to make a measurement Front Panel SCPI Command Select the Meter key To measure average voltage or current MEAS VOLT 1 MEAS CURR 1 Measurement Ranges Series N6700 User s Guide Some models have multiple voltage and current measurement ranges Refer to Chapter 1 Model Differences Selecting a lower measurement range provides greater measurement accuracy provided the measurement does not exceed the range Front Panel SCPI Command Select Measure Range SENS CURR RANG 0 1 1 SENS VOLT RANG 5 di Select a range and press Select E
15. The maximum measurable current is the maximum rating of the range If the measurement exceeds the range an Overload error will occur Examples of programming measurement ranges are 3 06 A range To select program values gt 0 1 A and lt 3 06 A 0 10 A range To select program values gt 200 uA and lt 0 1 A 200 YA range option 2UA To select program values lt 200 uA Seamless Measurements For Agilent Models N6781A and N6782A only you can select seamless voltage or current measurements The Auto selection provides seamless measurement ranging which results in a wide dynamic range with no data being lost across ranges Autoranging does not include the 10 pA range which must be selected manually Front Panel SCPI Command Not Available To select seamless current autoranging on channel 1 SENS CURR RANG AUTO 1 75 4 Operating the Power System Simultaneous Voltage and Current Measurements Some models have simultaneous voltage and current measurement capability Refer to Chapter 1 Model Differences In this case BOTH voltage and current can be acquired on any measurement Front Panel SCPI Command Not available Select the measurement function SENS FUNC VOLT ON 1 SENS FUNC CURR ON 1 Initiate and trigger the measurement system INIT ACQ 1 TRIG ACO 1 Fetch the voltage and current measurement FETC VOLT 1 FETC CURR 1 Auxiliary Voltage Measurements
16. As shipped from the factory the power system s pre configured settings should work in most LAN environments If you need to manually configure these settings press the Menu key then use the navigation keys to select System IO LAN Config In the Config menu you can then select from the following items IP Name Domain DNS TCP and Reset Note that the Reset command resets the LAN settings to the factory shipped state IP Select IP to configure the addressing of the instrument The configurable parameters include This parameter automatically configures the addressing of the instrument When selected the instrument will first try to obtain an IP address from a DHCP server If a DHCP server is found the DHCP server will assign an IP address Subnet Mask and Default Gateway to the instrument If a DHCP server is unavailable the instrument will try to obtain an IP address using AutolP AutolP automatically assigns an IP address Subnet Mask and Default Gateway addresses on networks that do not have a DHCP server This parameter allows you to manually configure the addressing of the instrument by entering values in the following three fields These fields only appear when Manual is selected This value is the Internet Protocol IP address of the instrument An IP address is required for all IP and TCP IP communications with the instrument An IP Address consists of 4 decimal numbers separated by periods Each decimal number ranges
17. N A N A 1 pA Source Effect Line regulation Voltage all ranges 300 pV 300 pV 300 pV Current all ranges 60 pA 60 pA 60 pA Programming Accuracy 23 C 5 C After 30 minute warm up from minimum to maximum programming range at any load Voltage 20 V range 0 025 1 8 mV 0 025 1 8 mV 0 025 1 8 mV Voltage 6V range 0 025 600 pV 0 025 600 uV 0 025 600 pV Voltage 600 mV range 0 025 200 pV 0 025 200 pV 0 025 200 pV Current 3A amp 1 A range 0 04 300 pA 0 04 300 pA 0 04 300 pA Current 300 mA range 0 03 150 pA 0 03 150 pA N A Current 100 mA range N A N A 0 03 12 pA Current 10 mA range N A N A 0 025 5 pA Resistance for 20 V 1 A output range 0 1 3 m0 N A N A Resistance for 6 V 3 A output range 0 1 1 5 mO N A N A Measurement Accuracy 23 C 5 C Voltage 20 V range 0 025 1 2 mV 0 025 1 2 mV 0 025 1 2 mV Voltage 1 V range 0 025 75 pV 0 025 75 pV 0 025 75 pV Voltage 100 mV range 0 025 50 pV 0 025 50 pV 0 025 50 pV Current 3 A range 0 03 250 pA 0 03 250 pA 0 03 250 pA Current 100 mA range 0 025 10 pA 0 025 10 pA 0 025 10 pA Current 1 mA range Current 10 pA range N6781A Auxiliary Voltage Measurement 0 025 100 nA 110 nA 2 0 025 8 nA 20 nA 0 025 5 mV 0 025 100 nA 110 nA 0 025 8 nA 20 nA N A 0 025 100 nA 110 nA 0 025 8 nA 20 nA N A Load Transien
18. Returns the instantaneous output voltage Returns data as ASCII or binary Sets the byte order of the external data log data Acquire command only on N676xA N678xA and Option 054 Enables the measurement system to receive triggers Enables the output transient system to receive triggers Enables disables continuous transient triggers Takes a measurement Takes a measurement Takes a measurement Takes a measurement Takes a measurement Takes a measurement Takes a measurement Takes a measurement Takes a measurement Takes a measurement Takes a measurement Takes a measurement returns the dc current returns the total rms current ac dc returns the high level of a current pulse returns the low level of a current pulse returns the maximum current returns the minimum current returns the dc voltage returns the total rms voltage ac dc returns the high level of a voltage pulse returns the low level of a voltage pulse returns the maximum voltage returns the minimum voltage Array commands only on N676xA N678xA and Option 054 Takes a measurement Takes a measurement returns the instantaneous output current returns the instantaneous output voltage Enables disables the specified output channel s Enables disables channel coupling for output synchronization Selects which channels are coupled Specifies a maximum delay offset to synchronize output changes Specifies the output delay coupling mode Returns
19. SENS VOLT RANG SENS VOLT RANG AUTO SENS WIND STEP TOUT TRIG ACQ CURR TRIG ACQ CURR SLOP TRIG ACQ SOUR TRIG ACQ TOUT TRIG ACO VOLT TRIG ACQ VOLT SLOP TRIG TRAN SOUR VOLT VOLT BWID VOLT LIM VOLT LIM COUP VOLT LIM NEG VOLT MODE VOLT PROT REM VOLT PROT REM NEG VOLT RANG VOLT SLEW VOLT SLEW MAX SOUR VOLT TRIG OFF ON MAX OFF VOLT OFF ON MAIN 1024 20 48E 6 MAX OFF RECT FALSE MIN POS BUS OFF MIN POS BUS MIN LOW MAX ON MIN FIX MAX MIN MAX 9 9E 37 ON MIN Series N6700 User s Guide Series N6700 User s Guide 2 Installation General hota HOR edd 24 JEDES 25 Bieta ling te EE 26 Connecting the Lime Cord ENEE 29 Comecting the Ae EE 30 Remote Sense Connections EE 34 Parallel COnM ChONS 603 c 03 cenctidinnecchdaaendatindhacadinancie 36 meres ONNBCUONS 4540 hndndhindedachkdadadedhindidadhdadidacin 38 Additional Load Considerations EE 40 Connecting the Auxiliary Voltage Measurement Input 42 This chapter describes how to install your power system It discusses rack mounting and line cord connections This chapter also discusses how to connect your load to the output terminals It discusses what you need to know about wire sizes and how to compensate for voltage drops in the load leads It describes various loads configurations and how to connect the output terminals in series and parallel Before installing the instrument check the list under Item
20. To enable output protection coupling Check the Enable Coupling box and OUTP PROT COUP ON press Select Output Watchdog Timer 86 The output watchdog timer causes all outputs to go into protection mode if there is no SCPI I O activity on the remote interfaces USB LAN GPIB within the user specified time period Note that the watchdog timer function is NOT reset by activity on the front panel or when using the Web server the outputs will still shut down after the time period has elapsed After the time period has expired the outputs will be disabled but the programmed output state is not changed The PROT bit in the status questionable register as well as the PROT indicator on the front panel will be set The watchdog delay can be programmed from 1 to 3600 seconds in 1 second increments As shipped from the factory the watchdog timer is set to disable the outputs 60 seconds after all IO activity has ceased The watchdog state and delay settings are volatile but can be saved and recalled as part of the instrument state A watchdog protect can be cleared as described under Clear Output Protection Functions Series N6700 User s Guide Operating the Power System 4 Front Panel SCPI Command Select Protect Wdog To enable the output watchdog timer Check Enable Watchdog to enable OUTP PROT WDOG ON the watchdog timer To set the output watchdog timer to 600 Enter a value in the Watchdog seconds Delay box and pr
21. To set all outputs to 2 A CURR 2 1 4 Enter a value and press Select For models with multiple ranges you can select a lower range if you need better output resolution Front Panel SCPI Command Press the Current key To select the lower range program a Select a lower range and press value that falls within the range Select CURR RANG 1 1 For Agilent N678xA models operating in voltage priority mode you can specify a Current limit which limits the output current at the specified value In voltage priority mode the output voltage remains at its programmed setting as long as the load current is within the positive or negative limit Check Tracking to let the negative current limit track the positive current limit setting Front Panel SCPI Command Press the Current key To select the current limit Specify a Current limit and or a CURR LIM 5 1 Current limit and press Select To select the negative current limit Check the Tracking box if you want CURR LIM NEG 3 1 the limit to track the limit To enable current limit tracking CURR LIM COUP ON RI Set the Output Mode This information applies to Agilent Models N678xA only Series N6700 User s Guide For Agilent N678xA models you can select either Voltage priority or Current priority mode In voltage priority mode the output is controlled by a bi polar constant voltage feedback loop which maintains the output voltage at it
22. generate an immediate trigger regardless of the trigger source Bus Pin lt n gt Transient lt n gt Ext Unless you are using the front panel menu or a TRIGger TRANsient command to trigger the output select a trigger source from the following Selects GPIB device trigger TRG or lt GET gt Group Execute Trigger Selects a pin on the external port connector as the trigger source lt n gt specifies the pin number The selected pin must be configured as a Trigger Input in order to be used as a trigger source see Appendix B Selects the output channel e transient system as the trigger source lt n gt specifies the channel When you select a channel you must also set up that channel s transient system to generate a trigger out signal Refer to Generate Trigger Out Signals Selects any pin configured as a trigger input as the trigger source Use the following commands to select a trigger source Front Panel To select Bus triggers select Transient TrigSource Select Bus To select Digital pin triggers select Transient TrigSource Then select one of the digital port pins To select Transient output triggers select Transient TrigSource Then select one of the output channels Initiate the Transient Trigger System Series N6700 User s Guide SCPI Command To select Bus triggers for output 1 TRIG TRAN SOUR BUS 1 To select Digital pin triggers RIG TRAN SOUR PIN lt n gt 1 where
23. which is comparable to linear supplies Available on Agilent N675xA N676xA and N678xA power modules lt 1 5 millisecond response time from 10 to 90 of the output rating Available on Agilent N675xA N676xA and N678xA power modules Transient response is less than 100 ps Available on Agilent N676xA and N675xA power modules Autoranging supplies the maximum rated power over a continuous range of voltage and current settings Series N6700 User s Guide Quick Reference 1 Output On Off sequencing A turn on turn off delay capability for each output allows output on off sequencing Remote voltage sensing Two remote sensing terminals are provided for each output When shipped the remote sense jumpers are included in a separate bag See Chapter 2 Output protection Each output has over voltage over current and over temperature protection Over voltage and over current protection are programmable Multiple Quadrant Available on Agilent N678xA power modules operation 2 and 4 quadrant operation provides source and sink output capability Measurement Features Multiple output Single Switch between a 4 output summary view and a 1 output detailed view of output meter display power supply information All power modules display real time output voltage and current measurements as well as status information Seamless measurement Available on Agilent N6781A and N6782A power modules autoranging Output measurements seamlessly autorange
24. 1253 5826 Phoenix Contact MSTB 2 5 4 STF Agilent 1253 6211 Phoenix Contact PC 4 4 ST 7 62 Agilent 1253 7187 Molex 39422 0002 Agilent 1253 8485 Phoenix Contact FMC 1 5 2 ST 3 5 Agilent 8120 8821 Phoenix Contact EPB 2 5 1733169 Agilent 0360 2935 Phoenix Contact 3118151 Agilent 1253 5830 Phoenix Contact MC 1 5 4 ST 3 5 N A 24 Series N6700 User s Guide Installation 2 Options Option Description DL Manual Set Contains User s Guide and Service Guide Also available as part number 5969 2939 054 High speed Test Extensions Includes digitized output measurements and output list capability Available for Agilent Models N675xA Included with Agilent Models N676xA 760 Output disconnect polarity reversal Disconnects the and output and sense terminals Switches the and output and sense polarities Not available on N6741B N6751A N6752A N676xA or N678xA 761 Output disconnect Disconnects and output and sense terminals Available for all power modules 908 Rack Mount Kit For mounting in a 19 inch EIA rack cabinet Also available as Model N6709A FLR Filler module For mainframes with less than four power modules Also available as Model N6708A 2UA 200 pA measurement range with output disconnect relays Only available on Agilent Models N676xA J01 Tracking overvoltage protection function Only available on Models N6752A N6754A and N6762A Inspecting the Unit When you receive your power system inspe
25. 4 30 1 26 6 0 0051 39 2 19 6 9 8 3 9 6 37 6 33 2 0 0034 58 29 14 7 5 9 10 59 2 52 3 0 0020 102 51 25 10 3 Notes 1 Capacity for AWG wires derived from MIL W 5088B Max ambient temp 55 C Max wire temp 105 C 2 Capacity for metric wires are derived from IE Publication 335 1 3 Capacity of aluminum wire is approximately 84 of that listed for copper wire uy 4 x indicates wire is not rated for the maximum output current of the power module 5 Because of wire inductance considerations it is also recommended that you keep your load leads twisted tie wrapped or bundled together and less than 50 feet 14 7 meters in length per lead Series N6700 User s Guide 31 2 32 Installation Agilent N678xA Wire Length Requirements Because of the effect of wire inductance the wire length information given in the previous table does not apply to Agilent Models N678xA 1 N678xA connector 2 Guard shield can be the shield of a coaxial cable To minimize the effect of wire inductance the following table describes the allowable load lead and wire length for several common output wire types Using longer or shorter wire lengths than those indicated in the table may cause output oscillation To module connector Cable Type Length in feet Length in meters Twisted pair AWG 14 or smaller 1 to 4 25 ft 0 3 to 1 3m 50 ohm coaxial RG 58 2 to 10 ft 0 6 to 3m 10 ohm coaxial inductance per 8 5 to 33 ft 2to 10m
26. 5 6 7 Bit 0 1 2 3 4 5 6 To configure the pins for digital I O Front Panel SCPI Command Select System 10 DigPort Pins To configure the pin function Select a pin in the Pin field DIG PIN lt 1 7 gt FUNC DIO In the Function field select Dig 1 0 To configure pin polarity i ee DIG PIN lt 1 7 gt POL lt pol gt In the Polarity field select either Ge Positive or Negative To send data to the pins DIG OUTP DATA lt data gt To send digital data to the pins select System 10 DigPort Data Select Data Out and enter the data as a binary number The digital I O pin can be used to control both relay circuits as well as digital interface circuits The following figure illustrates typical relay circuits as well as digital interface circuit connections using the digital I O functions 16 5 V Max 123 45 674 123 45 67L E Ee Current 0 1A Max Digital Output Bag e EE Ports 0 1 2 123 45 674 Relay driver TTL AS CMOS HC Ports 0 1 2 contains internal clamp diodes for ke ee e inductive flyback Digital Input d Po
27. GE EE O0000 q EZ oO O Vv AA 25 4 mm 1 00 432 5 mm 4 17 03 lt lt 482 6 mm gt 44 45 mm 19 00 4 75 O ae om OO e CID O a D0 eaeORSHH AIRFLOW oO Co jii mo e COOC O 100 Series N6700 User s Guide NOTE Appendix B Using the Digital Port Digital Control Po noun 102 Configuring the Digital Control Bon EEN 103 A Digital Control Port consisting of seven I O pins is provided to access various control functions Each pin is user configurable The following control functions are available for the I O pins Bi directional Digital I O Digital Input only External Trigger Fault Output Inhibit Input Output State see Appendix Di Earlier Agilent N6700A mainframes use a 4 pin connector instead of the 8 pin connector available on the N6700B N6701A and N6702A mainframes Refer to the Service Guide for information on pin functionality of the 4 pin connector Series N6700 User s Guide 101 Appendix B Using the Digital Port Digital Control Port An 8 pin connector and a quick disconnect connector plug are provided on each instrument for accessing the five digital control port functions TIGHTEN SCREWS 123 45 6724 Habicht INSERT WIRES Output trigger signal o yga y l L o Signal Common Input trigger signal mm Ca The digital control connector accepts wires sizes from AWG 14 to AWG 30
28. Guide The following steps will help you quickly get started connecting and configuring your instrument on a local area network The two types of local area networks connections that are discussed in this section are site networks and private networks 49 3 Getting Started 50 Connecting to a Site LAN A site LAN is a local area network in which LAN enabled instruments and computers are connected to the network through routers hubs and or switches They are typically large centrally managed networks with services such as DHCP and DNS servers To Network Interface To LAN Port Card NIC X PC Instrument To Site LAN 1 Ifyou have not already done so install the Agilent IO Libraries Suite from the Automation Ready CD that is shipped with your product 2 Connect the instrument to the site LAN The factory shipped instrument LAN settings are configured to automatically obtain an IP address from the network using a DHCP server DHCP is set On Note that this may take up to one minute The DHCP server will register the instrument s hostname with the dynamic DNS server The hostname as well as the IP address can then be used to communicate with the instrument The front panel Lan indicator will come on when the LAN port has been configured If you need to manually configure any instrument LAN settings refer to Configuring the LAN Parameters later in this chapter fo
29. SCH 1 85 4 Operating the Power System Factors that influence how long the settings change or output load change may last include difference between old output value and new output value the current limit setting and the load capacitance in CV mode or load inductance in CC mode The delay required must be determined empirically the power module programming response time characteristics may be used as guidelines Note that the time it takes the output to go into CC mode varies depending on the magnitude of the over current condition compared to the current limit setting For example if the over current is only slightly greater than the current limit setting it may take several tens of milliseconds depending on the power module type for the output to set the CC status bit If the over current is significantly greater than the current limit setting it may only take a few milliseconds or less depending on power module type for the output to set the CC status bit To determine when the output will shut down you must add the time it takes for the CC status bit to the over current protection delay time If the over current persists beyond the sum of these two time intervals the output will shut down Couple Output Protection Protection coupling lets you disable all output channels when a protection condition occurs on a single output channel To couple output protection Front Panel SCPI Command Select Protect Couple
30. a specific DNS server This value is the address of the DNS server It is used if you are not using DHCP or if you need to connect to a specific DNS server For improved performance when connected to an isolated subnet select Use the following DNS server However leave the DNS server address field blank Enable TCP Keepalive TCP keepalive timeout TCP Select TCP to configure the TCP keepalive settings of the instrument Check the Enable box to enable the TCP keepalive function The instrument uses the TCP keepalive timer to determine if a client is still reachable If there has been no activity on the connection after the specified time the instrument will send keepalive probes to the client to determine if it is still alive If not the connection will be marked as down or dropped The instrument will release any resources that were allocated to that client This is the delay in seconds before TCP keepalive probes will be sent to the client It is recommended that the largest value be used that still meets the application s need for unreachable client detection Smaller keepalive time out values will generate more keepalive probes network traffic using more of the available network bandwidth Allowed values 720 99999 seconds Reset Resets the LAN settings to the factory shipped state These settings are listed at the end of this chapter Series N6700 User s Guide Getting Started 3 Communicating Over the LA
31. as a source sourcing power The area in the shaded quadrants shows the output as a load sinking power Voltage 20 V 6 V e I oc V limit setting 1A 3A Current 1A 3 A Voltage T ge ae OC operation V limit applies to N6784A l only c 20 V Key 6V Sourcing power Sinking power lt Programmable Series N6700 User s Guide 121 Appendix E Source Operating Modes 122 The heavy solid line illustrates the locus of possible operating points as a function of the output load As shown by the vertical portion of the line the output current remains regulated at its programmed setting as long as the output voltage remains within the positive or negative voltage limit setting A CC constant current status flag indicates when the output voltage is within the limit settings If the output voltage reaches either the positive or negative voltage limit the unit no longer operates in constant current mode and the output current is no longer held constant Instead the power supply will now regulate the output voltage at its voltage limit setting Either a LIM positive voltage limit or LIM negative voltage limit status flag is set to indicate that either the positive or negative voltage limit has been reached As shown by the horizontal portions of the load line when the unit is sinking power the output current may continue to increase in the positive or negative direc
32. assist Or contact your Agilent Technologies Representative Series N6700 User s Guide Contents T Quick ROR TT 7 The Agilent N6700 Modular Power System At a Glance 8 The Front Panel At a Glance 11 The Rear Panel At a Glance 11 Front Panel Display At a Glance uuu scccsceeseesesessessssssesseseesesseseseesesees 12 Front Panel Keys At a Glance sssnnsssnnssnnsssrnnssninssrnnssrnnssnressnressrnnssrresena 13 Front Panel Menu Reference c c sccccsssssssessssssssssssessssssscssssssssssssssessesesees 14 SCPI Command Summanm 16 2 Installation a getest marae cli ai 23 General Information 24 Inspecting the Unit 0 ceececeseeesseseseseseeeeeseeeeeeeeeeeeeeeeteseesiteeeneeeeeeees 25 Installing the EE 26 Connecting the Lime Con 29 Connecting the Outputs cccecceeeccessesesseseesessessesseesesessesseeseeseeseeessnesteateneens 30 Remote Sense Connections ss sss ssssrsssrisssrressrinssrrnssrnessrnnssnnnnnnrensrnnnnnrensa 34 Parallel Connection 36 H TT EE 38 Additional Load Consideratons 40 Connecting the Auxiliary Voltage Measurement Input 42 3 GC OEB 43 Turning the Unit OMsivasnii wie inant ceainiinies ni inacnnial 44 Selecting an Output Channel 44 Entering an Output Voltage Setting 44 Entering a Current Limit Setting ccccceccecsessesseseeseeseeeeesesteseeseeseeneeeees 45 Enabling the Output 45 Using the Front Panel Men 46 Connecting
33. because you can directly access the OVP control of each channel without having to navigate through the menu levels Chan 2 Protect OWP OVP Level If you program an over voltage protection level that is lower than the present output voltage the over voltage protection circuit will trip and turn the output channel off The front panel status indicator will show OV Exiting the Command Menu Meter Back There are two ways to exit the command menu Press the Meter key to immediately return to the metering screen This is the quickest way to return to metering mode Press the Back key to back up one level at a time in the command menu This method may be more convenient if there are other menu commands to be given Detailed instructions on how to use the power system s functions and capabilities are found in the next chapter Detailed information about the SCPI programming commands are found in the Programmer s Reference Help file on your Agilent N6700 Product Reference CD In Case of Trouble Series N6700 User s Guide Press the Help key to obtain additional help about any function control menu level Press the Back key to exit the Help menu The front panel Err indicator comes on if self test fails or if other operating problems occur with your instrument Press the Error key to display the list of errors Refer to the N6700 Service Guide for further information The N6700 Service Guide is inc
34. cable foot lt 32 nH Guard Connection The purpose of a cable guard is to eliminate the effects of leakage current that can exist in the current path of the external test circuit The cable guard can be used when the test fixture requires guarding and the power system is sourcing or measuring DC currents under 1 pA Without a guard leakage currents in the test circuit could affect the accuracy of the micro amp measurements Guarding is generally not required when measuring currents 1 pA and greater As shown below cable guards are available at the internal module connector of Agilent Models N678xA The guard is typically used to drive the shields of cables and test fixtures It provides a buffered voltage that is at the same potential as the output terminals of the module connector The guard current is limited to about 300 pA eltse _guarD Series N6700 User s Guide Installation 2 Multiple Loads If you are using local sensing and are connecting multiple loads to one output connect each load to the output terminals using separate connecting wires as shown in the following figure 12A amp 20 A CONNECTOR 50 A CONNECTOR 8A CONNECTOR G 8 G S 50A SENSE S LS LS S SENSE JUMPERS INSTALLED FOR LOCAL SENSING SENSE TWIST JUMPERS LEADS INSTALLED FOR LOC
35. disabled When the Inhibit input is false the outputs are re enabled The Inhibit input is ignored Front Panel SCPI Command Select System 1I0 DigPort Pins To configure the Inhibit function Select pin 3 then Function then SE E Inhibit In In the Polarity field To select the inhibit input polarity DIG PIN3 POL lt pol gt select either Positive or Negative geg To latch the Inhibit signal Select Protect Inhibit OUTP INH MODE LATC Select either Latching or Live To set the Inhibit signal live To disable the Inhibit signal select OUTP INH MODE LIVE off To disable the Inhibit signal OUTP INH MODE OFF 105 Appendix B Using the Digital Port Fault Inhibit System Protection The following figure illustrates some ways that you can connect the Fault Inhibit pins of the connector FLT INH FLT INH FLT INH PAN d PIIN om I 1 23 45 67L 1 23 45 674 1 23 45 67L Panic IA ttl P INH switch Input hd p O O SSS INH Common As shown in the figure when the Fault outputs and
36. faster output response when the output capacitance is restricted to smaller values Series N6700 User s Guide Setting Low High1 High2 High3 Operating the Power System 4 If capacitive loads cause the output to oscillate on the default Low bandwidth or any of the other bandwidth settings a protection function will detect the oscillation and latch the output off The condition is annunciated by the OSC status bit At power on the oscillation protection function is enabled Select a bandwidth according to the following output capacitances and lead lengths Output Capacitance Sensing Maximum distance from sense point to capacitor 0 150 uF Local or remote Full lead length see chapter 2 0 1 uF Remote only 6 inches 155 mm 1 7 uF Remote only 6 inches 155 mm 7 150 uF Remote only 6 inches 155 mm See Chapter 2 under Agilent N678xA Wire Length Requirements for additional information on allowable load lead lengths Connecting capacitive loads that fall outside the indicated ranges may result in output instability or oscillation and may cause the output to turn off setting the OSC status bit Front Panel SCPI Command Select To select the bandwidth Output Advanced Bandwidth VOLT BWID HIGHI1 1 Select a bandwidth from the selections listed and press Select Set the Output Turn Off Mode This information applies to Agilent Models N678xA only Series N6700 User s Guide This lets you specify hi
37. from 0 through 255 This value is used to enable the instrument to determine if a client IP address is on the same local subnet When a client IP address is ona different subnet all packets must be sent to the Default Gateway Series N6700 User s Guide Getting Started 3 Default This value is the IP Address of the default gateway that allows the Gateway instrument to communicate with systems that are not on the local subnet as determined by the subnet mask setting A value of 0 0 0 0 indicates that no default gateway is defined Name Select Name to configure the hostname of the instrument If you want to change the hostname you should do so before you connect the instrument to the network Otherwise the original hostname may be cached in the network for up to several hours Host name This field registers the supplied name with the selected naming service If the field is left blank no name is registered A hostname may contain upper and lower case letters numbers and dashes The maximum length is 15 characters Use the navigation keys to enter an alpha character Use the up down navigation or arrow keys to select a letter from the alphabetic choices as you scroll through the selections Use the number keys to enter a number Each power system is shipped with a default hostname with the format A modelnumber serialnumber where mode lnumber is the mainframe s 6 character model number e g N6700B and serialnumber is the
38. mV 0 5 mV 1 2 mV 0 5 mV Current 1 mA 5 mA 2 mA 30 pA Programming Accuracy 23 C 5 C after 30 min warm up Applies from minimum to maximum programming range at any load Voltage high range 0 06 19 mV 0 06 10mV 0 06 25 mV 0 016 6 mV Voltage low range lt 5 5 V N A N A N A 0 016 1 5 mV Current high range 0 1 20 mA 0 1 30mA 0 1 12 mA 0 04 200 uA Current low range lt 100mA 0 7 V N A N A N A 0 04 30 uA lt 100mA 7 50 V N A N A N A 0 04 55 pA Measurement Accuracy at 23 C 5 C Voltage high range 0 05 20 mV 0 05 10 mV 0 05 25 mV 0 016 6 mV Voltage low range lt 5 5 V N A N A N A 0 016 1 5 mV Current high range 0 1 4 mA 0 1 30 mA 0 1 8 mA 0 04 160 nA Current low range lt 100mA 0 7 V N A N A N A 0 03 15 uA NOTE lt 100mA 7 50 V N A N A N A 0 03 55 pA 200 uA current range Option 2UA N A N A N A 0 5 100 nA Load Transient Recovery Time Time to recover to within the settling band following a load change from 60 to 100 and from 100 to 60 of full load for models N6751A amp N6761A from 50 to 100 and from 100 to 50 of full load for models N6752A N6762A N6753A amp N6754A Voltage settling band 75 mV NOTE2 30 mV NOTE 90 mV NOTE 4 75 mV Time lt 100 us lt 100 us lt 100 us lt 100 us a Applies when measuring 4096 data points SENSe SWEep POINts 4096 2 When relay option 761 is installed on
39. n is the pin number To select Transient output triggers RIG TRAN SOUR TRAN lt n gt 1 where n is the output channel that will generate the trigger signal Next you must initiate or enable the transient trigger system When the power system is turned on the trigger system is in the idle state In this state the trigger system is disabled ignoring all triggers Initiating the trigger system moves it from the idle state to the initiated state which enables the power system to receive triggers To initiate the trigger system use SCPI Command To initiate the transient trigger system INIT TRAN 1 Front Panel Select the Transient Control Scroll to Initiate and press Select 67 4 Operating the Power System It takes a few milliseconds for the instrument to be ready to receive a trigger signal after receiving the INITiate TRANsient command If a trigger occurs before the trigger system is ready for it the trigger will be ignored You can test the WTG_tran bit in the operation status register to know when the instrument is ready to receive a trigger after being initiated Front Panel SCPI Command Not Available To query the WTG_tran bit bit 4 STAT OPER COND 1 If a bit value of 16 is returned in the query the WTG_tran bit is true and the instrument is ready to receive the trigger signal Refer to the N6700 Programmer s Reference Help file for more information Unless INITiate
40. of the Agilent IO Libraries Suite to add the N6700 power system and verify a connection To add the instrument you can request the Connection Expert to discover the instrument If the instrument cannot be found add the instrument using the instrument s hostname or IP address If this does not work refer to the chapter on Troubleshooting Guidelines in the Agilent Technologies USB LAN GPIB Interfaces Connectivity Guide Series N6700 User s Guide 5 You can now use Interactive IO within the Connection Expert to communicate with your instrument or you can program your instrument using the various programming environments You can also use the Web browser on your computer to communicate with the instrument as described under Using the Web Server later in this chapter 51 3 Getting Started Viewing the Active LAN Settings To view the currently active LAN settings press the Menu key then use the navigation keys to select System IO LAN ActiveSettings The currently active settings for the IP Address Subnet Mask and Default Gateway may be different from the front panel configuration menu settings depending on the configuration of the network If the settings are different it is because the network has automatically assigned its own settings Modifying the LAN Settings The power system must be rebooted for any LAN setting modifications to take effect Automatic Manual IP Address Subnet Mask 52
41. on N678xA Sets the voltage limit tracking state only on N6784A Sets the negative voltage limit only on N6784A Sets the voltage trigger mode Sets the over voltage protection level Sets the positive over voltage remote protection level N678xA Sets the negative over voltage remote protection level N6784A Enables disables tracking OVP only on Option J01 Sets the tracking OVP offset only on Option J01 Sets the output voltage range Sets the output voltage slew rate Enables disables the maximum slew rate override Returns the value of the operation event register Returns the value of the operation condition register Enables specific bits in the Event register Sets the Negative transition filter Sets the Positive transition filter Presets all enable and transition registers to power on Returns the value of the questionable event register Returns the value of the questionable condition register Enables specific bits in the Event register Sets the Negative transition filter Sets the Positive transition filter Returns the number of output channels in a mainframe Returns the model number of the selected channel Returns the option installed in the selected channel Returns the serial number of the selected channel Specifies the Remote Local state of the instrument Returns the control connection port number Returns the error number and error string Group commands do NOT apply to N678xA Returns the groups that have been
42. rather than at the output terminals This allows for more precise overvoltage monitoring directly at the load Since incorrect sense terminal wiring could defeat this feature there is also a backup local OVP function The local OVP function tracks the programmed OVP setting and trips if the voltage at the and output terminals rises more than 1 5 V above the programmed OVP setting The local OVP also trips if the voltage at the and output terminals exceeds 7 5 V on the 6 V range and 21 5 V on the 20 V range Output Noise Considerations Any noise picked up on the sense leads will appear at the output terminals and may adversely affect CV load regulation Twist the sense leads or use a ribbon cable to minimize the pickup of external noise In extremely noisy environments it may be necessary to shield the sense leads Ground the shield at the power system end only do not use the shield as one of the sensing conductors The noise specifications in Appendix A apply at the output terminals when using local sensing However voltage transients may be produced at the load by noise induced in the leads or by load current transients acting on the inductance and resistance of the load lead If it is desirable to keep voltage transient levels to a minimum place an aluminum or tantalum capacitor with an approximate value of 10 uF per foot 80 5 cm of load lead right across the load Series N6700 User s Guide 35 2 Installation Parallel C
43. repeat the pulse as needed For example to program a pulse train of 50 pulses use Front Panel SCPI Command Select Transient List Repeat To program output 1 use Enter the number of list repetitions LIST COUN 50 1 50 and Press Select Specify if you want the output pulse to generate a trigger signal that can be used to trigger actions on other output channels or on any external equipment connected to the digital port For example to generate a trigger signal at the end of the pulse use Front Panel SCPI Command Select Transient List Config To program a trigger at the End of the Select List Step 0 and check the pulse for output 1 use Tout Step box Press Select LIST TOUT EOST 1 0 1 You must program a value of 0 no trigger for step 1 as a placeholder Specify the output state after the pulse has completed For example to return the output to the state it was in before the pulse use Front Panel SCPI Command Select Transient List Terminate To program output 1 use Select Return to Start Press Select LIST TERM LAST 0 1 Select the trigger source that will generate the pulse or pulse train For example to select Bus triggers as the trigger source use Front Panel SCPI Command Select Transient TrigSource To program output 1 use Select Bus and press Select TRIG TRAN SOUR BUS 1 Initiate the transient trigger system To enable the trigger system for one transient event or tri
44. return all output channels to their default settings you can either cycle AC power or send the following commands Front Panel SCPI Command Select States Reset RST or POW LIM MAX 1 4 When an output channel is set to MAX it returns to its maximum rated value and the power limit function will not activate Series N6700 User s Guide 109 Series N6700 User s Guide Appendix D Output On Off Synchronization Synchronizing Output Turn on Delays ENEE 112 Synchronizing Multiple Mamframes ENEE 115 Ae EE 116 This chapter discusses output on off synchronization This function lets you accurately synchronize output turn on sequences by letting you specify a common delay offset which serves as a reference point for the user programmed turn on delays This same reference point also makes it possible to connect multiple Agilent N6700 series mainframes together and program accurate turn on sequences across multiple mainframes There is no need to specify a delay offset when outputs turn off Outputs start executing their turn off delays as soon as an output Off command is received 111 Appendix D Output On Off Synchronization Synchronizing Output Turn on Delays All N6700 Power Modules that are installed in an Agilent N6700 mainframe exhibit a minimum delay offset that applies from the time that a command to turn on the output is received until the output actually turns on If you specify a user programmed turn on d
45. the instrument to the computer using a LAN crossover cable Alternatively connect the computer and the instrument to a standalone hub or switch using regular LAN cables Make sure your computer is configured to obtain its address from DHCP and that NetBIOS over TCP IP is enabled Note that if the computer had been connected to a site LAN it may still retain previous network settings from the site LAN Wait one minute after disconnecting it from the site LAN before connecting it to the private LAN This allows Windows to sense that it is on a different network and restart the network configuration If you are running Windows 98 you may need to manually release the previous settings 3 The factory shipped instrument LAN settings are configured to automatically obtain an IP address from a site network using a DHCP server You can leave these settings as they are Most Agilent products and most computers will automatically choose an IP address using auto IP if a DHCP server is not present Each assigns itself an IP address from the block 169 254 nnn Note that this may take up to one minute The front panel Lan indicator will come on when the LAN port has been configured Turning off DHCP reduces the time required to fully configure a network connection when the power system is turned on To manually configure the instrument LAN settings refer to Configuring the LAN Parameters later in this chapter 4 Use the Connection Expert utility
46. the maximum delay offset required for a mainframe 17 1 Quick Reference SCPI Command OUTPut STATe continurd DELay FALL lt NRf gt chanlist RISE lt NRf gt chanlist PMODe VOLTage CURRent chanlist TMODe HIGHZ LOWZ chaniist INHibit MODE LATChing LIVE OFF PON STATe RST RCLO PROTection CLEar chanlist COUPle lt Bool gt DELay lt NRf gt chanlist OSCillation lt Bool gt chanlist WDOG STATe lt Bool gt DELay lt NRf gt RELay POLarity NORMal REVerse chanlist SENSe CURRent CCOMpensate lt Bool gt chanlist DC RANGe UPPer lt NRf gt chanlist AUTO lt Bool gt chanlist FUNCtion VOLTage CURRent NONE chanlist CURRent lt Bool gt chanlist MOL Tage lt Bool gt chanlist INPut MAIN AUXiliary chanlist SWEep OFFSet POINts lt NRf gt chanlist POINts lt NRf gt chanlist TINTerval lt NRf gt chanlist VOLTage DC RANGe UPPer lt NRf gt chanlist AUTO lt Bool gt chanlist WINDow TYPE HANNing RECTangular chanlist SOURce CURRent LEVel IMMediate AMPLitude lt NRf gt chanlist TRIGgered AMPLitude lt NRf gt chanlist LIMit POSitive IMMediate AMPLitude lt NRf gt chanlist COUPle lt Bool gt chanlist NEGative IMMediate AMPLitude lt NRf gt chanlist 18 Description Sets the outpu
47. to the Interfaces E 48 Communicating Over the LAN E 55 Securing the Interfaces senian ana 57 4 Operating the TE EE 59 Programming the Output c cccccsessessesessessesseesesseseesesseeseeseessetssesstenteneenees 60 Synchronizing Output Steps 66 Programming Output Usts 70 Making Measurements AEN 75 Using the Digitizers eege EE dE EES 77 Series N6700 User s Guide 5 Updates Using the Protection Functions cccececsecesseseeteseeteeeeteeeeteeeeteteteeeteeeeees 83 System Related Operations sss sssnssss11nssrinssrinssnressrnnssrressrnnssnrnssrrnssrrnesnene 88 App ndix SS PC SULA AUN NS E 93 Agilent Models N6731B N6736B N6741B N6746B cece 94 Agilent Models N6751A N6752A N6753A N6754A N6761A N6762A 95 Agilent Models N6773A NG mpA 96 Agilent Models N6781A N6782A ccccessesssssesestssessesseseestessessesseesteneeess 97 Agilent N6700B N6701A N6702A MPS Mainframes ssssssisssssreenennn 98 Appendix B Using the Digital Port c cccssscssssssssssssesesesseseseesaeseseesassaesesaesansesansanensaseas 101 Digital Control Port 102 Configuring the Digital Control Port 103 Appendix C Power AMG E 107 Power Limit Operation c ccscsssscssescsesssssssssessssescssssssesssssesssssssssesessesesees 108 Module Power Allocation c ccccssscsescsssscssesssssssssesssesessessssesseseseeseeees 109 Appendix D Output On Off Synchronization scssccsess
48. to the channel number indicates the output s status In this case the output channel is in constant voltage mode 12 5230V 0 1 789A 2 0004 EHR For a description of the status indicators refer to Chapter 1 under Front Panel Display At a Glance Series N6700 User s Guide 45 3 Getting Started Using the Front Panel Menu 46 The front panel command menu lets you access most of the power system s functions The actual function controls are located at the lowest menu level Briefly Press the Menu key to access the command menu Press the navigation keys to move across the menu commands Press the center Sel key to select a command and move down to the next level in the menu Press the Help key at the lowest menu level to display help information about the function controls A map of the front panel command structure is found in Chapter 1 The following example shows you how to navigate the front panel command menu to program the over voltage protection function Set the Over Voltage Protection Menu The over voltage protection function turns off the affected output if the output voltage reaches the programmed over voltage limit Press the Menu key to access the front panel command menu The first line identifies the output channel that is being controlled followed by the menu path Since the top level is displayed the path is empty The second line indicates the commands tha
49. value If you exit a field without pressing the Enter key the value is ignored 13 1 Quick Reference Front Panel Menu Reference Menu commands that appear grayed out on the front panel are either not available for the power module or are password protected Menu Command Output Voltage Control Description Programs voltage setting limits and ranges Current Programs current setting limits and ranges Mode Programs output priority mode on Models N678xA Sequence Delay Programs Turn on Turn off delay Couple Couples output channels for output on off synchronization Advanced Slew Voltage Programs voltage slew rate Current Programs current slew rate on Models N678xA Power Programs the power allocation function Pol Lets you reverse the polarity of the output and sense terminals Resistance Programs output resistance on Model N6781A Bandwidth Programs output voltage bandwidth on Models N678xA Tmode Programs output turn on turn off impedance on Models N678xA Measure Range Selects voltage and current measurement range Sweep Specifies measurement points time interval and trigger offset Window Selects measurement window Rectangular Hanning Input Selects Auxiliary voltage measurements on Model N6781A Control Lets you abort a measurement in progress Transient Mode Selects voltage or current transient mode Fixed Step List Step Programs volta
50. 35 polarity reversgl 63 DU DI HUSS 120 TOSISTANCE ececsecseesseceecceesseececeeeseseueesesseseeteaeeeneeeeeateees 64 COSTE osc ee eh ea 65 turnom del cesses ceetnscesesdncscosedacsensetbacanctazconsennaet 63 output Teatures 8 OUTPUT State na eee eR 106 OUTPUT WE 66 output trigger GIE 66 generalerna 68 initiate eea R 67 levele E neste 66 0 Ol 67 outputs in parallel 37 Series N6700 User s Guide OUTPUTS IN Series 39 OV cts E 13 over current protection cceccesceseseseseestesteseeseeseeseesees 85 over voltage protection c cceccescescessesseseeseseeseeseeeees 35 84 el 35 D 46 PACKING ses e RE NA 84 P parallel OUTPUTS eesessessescssessessessesssstestesteseeseeseeneenes 89 PASSWOMC A E E 57 front pang 90 NEE 13 power allocation cescssesessesesesseseeeseesesesseseeseseeseseesesees 108 power cord Conpnectng 29 power factor 400 HS 28 power receptacle sssssssssrsinssssriinssnrrinnssnrrnensnnrrnnsnnne 26 OC dire E 79 DIME At a ees 2 priority MOQ Eienenn 120 PROT n 13 protection cleane e eee eet ee 87 COUPIING ee 86 Tunctons eeseeceecseesseseeeseeceeeseesseeeeseeseeeeateeneeetenteeneenees 84 Watchdog mer 86 PUSO EE DI H TACK MOUNTING esceececseeseessesseeeeeseeseeeeteeeeseeeseeeteeeeeeeees 26 tools reguired ceececseesecsesseesessteeeeeeeseeeeeteeeeeeeeateees 26 e E ET 79 relay OUTPUT E 63 remote interface factory Settings innin 57 Ell DEE 57 FEMOLE SEN
51. 5 10mA 0 15 5mA 0 15 4 mA 0 15 4 mA 0 15 2 mA Load Transient Recovery Time time to recover to within the settling band following a load change from 50 to 100 and from 100 to 50 of full load NOTE 3 NOTE 3 Voltage settling band 0 08V 01V 0 08V 01V 02V 03V 02V 03V 04V 05V 05V 1 0V Time lt 200 us lt 200 us lt 200 us lt 200 us lt 200 us lt 200 us Output current is derated 1 per C above 40 C When relay Option 760 is installed on Model N6742B the maximum output current will be limited to 10 A 3 When relay Option 760 or 761 is installed the settling band is 0 10V 0 125 V Option 760 is not available on Model N6741B 94 Series N6700 User s Guide Specifications Appendix A Agilent Models N6751A N6752A N6753A N6754A N6761A N6762A Performance Specifications N6751A N6752A N6753A N6754A N6761A N6762A DC Output Ratings Voltage 50 V 20 V 60 V 50 V Current derated 1 per C above 40 C 5A 10A 50A 20A 15A 3A Power 50 W 100 W 300 W 300 W 50 W 100 W Output Ripple and Noise PARD from 20 Hz 20 MHz CV peak to peak 4 5 mV 5 mV 6 mV 4 5 mV CV rms 0 35 mV 1 mV 1 mV 0 35 mV Load Effect Regulation Applies for any output load change with a maximum load lead drop of 1V lead The load lead drop reduces the maximum available voltage at the load Voltage 2mV 2 mV 2 mV 0 5 mV Current 2 mA 12 mA 5 mA 30 uA 0 7 V 65 uA 7 50 V Source Effect Regulation Voltage 1
52. 52 OU 50 Eltere 50 le sees ee REA 56 Tele cctcin ce ctecoece cca cate cecedetevanvoeviendbastcretbereencrasmorees 56 list lgl E 73 Drogrammlpng 70 load Connections s ssssessessrenesrisssrinsrinssriessrinssrressrressrrees 30 lockout front panel 90 M measure Commandes 75 measurement features cceecceseeseseeseseeseseeseseeseseeseneeees 9 measurement trigger deneta tenerne rS 83 NIE ER DIE 81 measurements 124 Dee 80 Converter 81 Hanning Window ss sssssssnsnssnsnssssrinnsssnrinnssnrrnnnssnrrnenens 79 Rectangular vwindouw 79 sample interval ssis sissi niaan 78 simultaneous V and 76 Meng eeneg ie 46 model differences sc ccsecsecesseesesseeseeeeeeseeeeeeteeeeeees 10 model numbers ssssssssssssssrtrtteeessesssssrrrrretennnsnnnnrrrrtteennnnnnns 24 multiple load Connection 33 N N6781A auxiliary measurements 76 resistance PLOGFAMMING ccsescesesseesessessesseeceseenees 64 N678xA digitizing speed 78 wire length requirements c ccccccsesseseeseeseeseeseeees 32 non volatile RAM settings ccsscsssesessseseeeseeseseees 57 0 Deeg 13 UD etcetera te tear eee 13 rd 25 oscillation protection ccceseeseseestesesteseeseestesseseeseeseaees 87 UE 13 outline diagram scesessessessessessessesestssesseeseeseeseeneass 26 100 output bandwidths 64 OMADIE eeceeceecseeseesesseeeeeeeeseeeeeteetsetesteeteneeaees 45 62 63 COU PS eisirean eea AE 37 89 ole
53. A includes output disconnect Programmable sample rate e e e relays Array readback capability3 e e e 30nly available when using the remote Double wide occupies 2 channel locations 10 interfaces not from the front panel Series N6700 User s Guide Quick Reference 1 The Front Panel At a Glance Display Navigation keys Output keys Turns off after 1 hour of Move the cursor to a menu item Turn the outputs on or off inactivity Press any key to Select the highlighted menu item Enter voltage or current restore the display a X Agilent N6700A Modular Power System E KS a Es CG les E e R E i Ge 5 i d o CV Set 20 000V 5 500A Hep Err E en Co CIGA el e d Dee On Off switch and LED System keys Numeric entry keys LED indicates power is on Toggle between single channel and Enter values Green normal operation multiple channel view Arrow keys increment or Amber display is screen Access front panel command menu decrement voltage and saver mode Select an output channel to control current settings The Rear Panel At a Glance 3 pin IEC 320 AC input connector Chassis ground Power cord requires GPIB connector binding post ground conductor
54. AL g be e SENSING LOAD LOAD LOAD LOAD LOAD LOAD This minimizes mutual coupling effects and takes full advantage of the power system s low output impedance Keep each pair of wires as short as possible and twist or bundle them to reduce lead inductance and noise pickup Note that Agilent Models N678xA have additional wiring restrictions as discussed under Agilent N678xA Wire Length Requirements If load considerations require the use of distribution terminals that are located away from the instrument connect the output terminals to the remote distribution terminals by a pair of twisted or bundled wires Connect each load to the distribution terminals separately Remote voltage sensing is recommended under these circumstances Sense either at the remote distribution terminals or if one load is more sensitive than the others directly at the critical load Series N6700 User s Guide 33 2 Installation Remote Sense Connections WARNING SHOCK HAZARD Turn off AC power before making or changing rear panel connections Remote sensing improves the voltage regulation at the load by monitoring the voltage there instead of at the output terminals This allows the power system to automatically compensate for the voltage drop in the load leads Remote sensing is especially useful for CV operation with load impedances that vary or have significant lead resistance It has no effect during CC operation Because
55. AXimum INFinity or to a very large value the slew rate will be limited by the analog performance of the output circuit The slowest or minimum slew rate is model dependent and is a function of the full scale range For other ranges the minimum slew rate is proportional to the full scale range The current slew rate control is only available on Agilent N678xA models It determines the rate at which the current changes to a new programmed setting When set to MAXimum INFinity or to a very large value the slew rate will be limited by the analog performance of the output circuit The slowest or minimum slew rate is model dependent and is a function of the full scale range For other ranges the minimum slew rate is proportional to the full scale range Enable the Output 62 Front Panel SCPI Command Press the On Off key To enable only output 1 To enable disable ALL outputs OUTP ON 1 using the On Off key select To enable outputs 1 4 System Preferences Keys OUTP ON 1 4 Check On Off affects all channels Because of internal circuit start up procedures and any installed relay options output on may take between 35 and 50 milliseconds to complete its function Conversely output off may take between 20 and 25 milliseconds to complete its function To mitigate these built in delays you can program the output to zero volts rather than using the output on off function Series N6700 User s Guide Operating the Power Sys
56. Agilent Technologies Low Profile Modular Power System Series N6700 User s Guide 2 Agilent Technologies Legal Notices Agilent Technologies Inc 2006 2010 No part of this document may be photocopied reproduced or translated to another language without the prior agreement and written consent of Agilent Technologies Inc as governed by United States and international copyright laws Warranty The material contained in this document is provided as is and is subject to being changed without notice in future editions Further to the maximum extent permitted by applicable law Agilent 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 merchantability and fitness for a particular purpose Agilent 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 Agilent and 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 Manual Editions Manual Part Number 5969 2937 Fifth Edition October 2010 Printed in Malaysia Reprints of this manual containing minor corrections and updates may have the same printing date Revise
57. Be certain that your power outlet is of the three conductor type with the correct pin connected to earth ground Connect the power cord to the IEC 320 connector on the rear of the unit If the wrong power cord was shipped with your unit contact your nearest Agilent Sales and Support Office The AC input on the back of your unit is a universal AC input It accepts nominal line voltages in the range of 100 VAC to 240 VAC The frequency can be 50 Hz 60 Hz or 400 Hz Agilent N6702A Mainframe Note Standard AC mains circuits rated at nominal 100 120 VAC cannot supply enough current to power the N6702A mainframe when it is operated at its full rated power Nevertheless the N6702A can be connected to an AC mains circuit rated at nominal 100 120 VAC In this case internal circuits will limit the power available to modules to 600 W As a result of this power limiting the current drawn from the AC mains will be lt 15 A so that standard 100 120 VAC AC mains circuits will not be overloaded The detachable power cord may be used as an emergency disconnecting device Removing the power cord will disconnect AC input power to the unit Snap On Ferrite Core Installing the ferrite core is only necessary if you are connecting highly sensitive loads to the output of the power system The purpose of the ferrite core is to reduce the possibility of common mode current spikes appearing at the output of the power system when AC power is switched on o
58. D D e D e Output disconnect relays Opt 761 Opt 761 Opt 761 Opt 761 Opt 761 Opt 761 Opt 761 Opt 761 Output disconnect Polarity reversal relays Opt 760 Opt 760 Opt 760 Opt 760 Precision voltage and current measurements D e Low voltage output and measurement range D D Low current output and measurement range H e 200 microampere measurement range Opt 2UA Opt 2UA2 Simultaneous voltage and current measurement D e Voltage or current turn on priority D e Output list capability Test Extensions D Opt 054 Opt 054 Opt 054 Programmable sample rate Test Extensions D e Opt 054 Opt 054 Opt 054 Array readback capability Test Extensions 3 e e Opt 054 Opt 054 Opt 054 Double wide occupies 2 channel locations e Feature Source Measure Units e available N6781A N6782A N6784A 20 W output rating D D D 2 quadrant operation D D 4 quadrant operation e Output disconnect relays D D D Voltage or current priority mode D D D Programmable output resistance e 600 mV output range D D D 300 mA output range D D 100 mA 10 mA output ranges e 1V 100 mV measurement ranges D D D 100 mA 1 mA 10 UA measurement ranges D D D Simultaneous voltage and current measurements D D D Seamless measurement autoranging D Notes ET E 8 S 10utput current is limited to 10A maximum on Models N6742B and N6773A Option 760 Auxiliary voltage measurement S is not available on Model N6741B Output list capability 20ption 2U
59. Inhibit inputs of several mainframes are daisy chained an internal fault condition in one of the mainframes will disable all of them without intervention by either the controller or external circuitry You can also connect the Inhibit input to a manual switch or external control signal that will short the Inhibit pin to common whenever it is necessary to disable all output channels in the mainframe Negative polarity must be programmed for all pins in this case You can also use the Fault output to drive an external relay circuit or signal other devices whenever a user definable fault occurs Clearing a System Protection Fault To restore all instruments to a normal operating condition when a fault condition occurs in a daisy chained system protection configuration two fault conditions must be removed 1 The initial protection fault or external Inhibit signal 2 The subsequent daisy chained fault signal which is sourced by the Inhibit signal Even when the initial fault condition or external signal is removed the Inhibit fault signal is still active and will continue to shut down the outputs of all the mainframes To clear the daisy chained fault signal if the operating mode of the Inhibit input is Live simply clear the output protection on any ONE mainframe as explained in chapter 4 If the operating mode of the Inhibit input is Latched turn off the Inhibit input on ALL mainframes individually To re enable the chain re progr
60. LTage LEVel lt NRf gt channel CMRR channel LIMit POSitive lt NRf gt channel MEASure lt NRf gt channel AUXiliary channel DISPlay WINDow CHANnel lt NR1 gt VIEW METER1 METER4 FETCh SCALar CURRent DC chanlist ACDC chanlist HIGH chanlist LOW chanilist MAXimum chanlist MINimum chanlist 16 Description Resets the measurement trigger system to the Idle state Resets the transient trigger system to the Idle state Calibrates the output current programming Calibrates the positive current limit only on N678xA Calibrates the current measurement Calibrates the peak current limit only on N675xA N676xA Enters the calibration value Sets the calibration date Calibrates the current downprogrammer Advances to the next calibration step Sets the numeric calibration password Calibrates the output resistance only on N6781A Saves the new cal constants in non volatile memory Enables disables calibration mode Calibrates the output voltage programming Calibrates common mode rejection ratio only N675xA N676xA Calibrates the positive voltage limit only on N678xA Calibrates the voltage measurement Calibrates the auxiliary voltage measurement only on N6781A Selects the channel in 1 channel meter view Selects 1 channel or 4 channel meter view Fetch commands only on N676xA N678xA and Option 054 Returns the DC current Returns the total rms cu
61. Model N6752A the settling band is 125 mV 3 When relay option 760 or 761 is installed on Model N6753A the settling band is 200 mV 4 When relay option 760 or 761 is installed on Model N6754A the settling band is 350 mV Series N6700 User s Guide 95 Appendix A Specifications Agilent Models N6773A N6776A Performance Specifications N6773A N6774A N6775A N6776A DC Output Ratings Voltage 20V 35 V 60 V 100 V Current NOTE 1 15 A NOTE2 8 5 A 5A 3A Power 300 W 300W 300 W 300 W Output Ripple and Noise PARD from 20 Hz 20 MHz CV peak to peak 20 mV 22 mV 35 mV 45 mV CV rms 3 mV 5 mV 9 mV 18 mV Load Effect Regulation Applies for any output load change with a maximum load lead drop of 1V lead The load lead drop reduces the maximum available voltage at the load Voltage 13 mV 16 mV 24 mV 45 mV Current 6 mA 6 mA 6 mA 6 mA Source Effect Regulation Voltage 2 mV 4 mV 6 mV 10 mV Current 1mA 1mA 1mA 1mA Programming Accuracy 23 C 5 C after 30 minute warm up Applies from minimum to maximum programming range at any load 0 1 20 mV 0 15 60 mA Voltage Current 0 1 35 mV 0 15 60 mA 0 1 60 mV 0 15 60 mA 0 1 100 mV 0 15 30 mA Voltmeter Ammeter Measurement Accuracy at 23 C 5 C Voltage 0 1 20 mV Current 0 15 15 mA 0 1 35 mV 0 15 12 mA 0 1 60 mV 0 15 12 mA 0 1 100 mV 0 15 6 mA Load Transient Recovery Time tim
62. N The Agilent IO Libraries Suite along with instrument drivers for specific programming environments can be used to communicate with your power system You can also communicate with your power system using its built in Web server the Telnet utility or sockets These latter methods are a convenient way to communicate with the power system without using I O libraries or drivers In all cases you must first establish a LAN connection from your computer to the power system as previously discussed Using the Web Server NOTE Your power system has a built in Web server that lets you control it directly from an internet browser on your computer With the Web server you can access the front panel control functions including the LAN configuration parameters Up to two simultaneous connections are allowed With additional connections performance will be reduced The built in Web server only operates over the LAN interface It requires Internet Explorer 7 or Firefox2 You also need the Java Sun Plug in This is included in the Java Runtime Environment Refer to Sun Microsystem s website If you are using Internet Explorer 7 open a separate browser window for each connection The Web server is enabled when shipped To launch the Web server 1 Open the internet browser on your computer 2 Enter the instrument s hostname or IP address into the browser s Address field to launch the Web server The following home page will appear
63. Note that wire sizes smaller than AWG 24 are not recommended Disconnect the connector plug to make your wire connections It is good engineering practice to twist and shield all signal wires to and from the digital connectors If shielded wire is used connect only one end of the shield to chassis ground to prevent ground loops The following chart describes the possible pin configuration for the digital port functions For a complete description of the electrical characteristics of the digital I O port refer to Appendix A Pin Function Available configurable pins Digital 1 0 and Digital In Pins 1 through 7 External Trigger In Out Pins 1 through 7 Fault Out Pins 1 and 2 Inhibit In Pin 3 Output State Pins 4 through 7 Common L Pin 8 In addition to the configurable pin functions the active signal polarity for each pin is also configurable When Positive polarity is selected a logical true signal is a voltage high at the pin When Negative polarity is selected a logical true signal is a voltage low at the pin 102 Series N6700 User s Guide Using the Digital Port Appendix B Configuring the Digital Control Port Bi directional Digital 1 0 Each of the seven pins can be configured as general purpose bi directional digital inputs and outputs The polarity of the pins can also be configured Pin 8 is the signal common for the digital I O pins Data is programmed according to the following bit assignments Pin 1 2 3 4
64. RNING notice until the indicated conditions are fully understood and met Safety Symbols Direct current Alternating current Both direct and alternating current Three phase alternating current Earth ground terminal Protective earth ground terminal Frame or chassis terminal Terminal is at earth potential Neutral conductor on permanently installed equipment Line conductor on permanently installed equipment On supply Off supply Standby supply Unit is not completely disconnected from AC mains when switch is off GO FT ZFL H 2 2 In position of a bi stable push switch Out position of a bi stable push switch Caution risk of electric shock Caution hot surface Caution refer to accompanying description gt So In this Book Specific chapters in this manual contain the following information Quick Reference Chapter 1 is a quick reference section that helps you quickly become familiar with your Agilent N6700 Modular Power System It describes the differences between the various modules in the power system Installation Chapter 2 describes how to install your power system It describes how to connect various loads to the output It discusses remote sensing as well as parallel and series operation Getting Started Chapter 3 describes how to set the voltage current over voltage protection and turn on the output It also describes how to configure the remote in
65. SING cccessessessessessesessessessesssssestsstsseeseeseeseeneenes 34 EE 22 TESISTANCE eecceeseecsecssesseseesceeseesseeeeeeeeseeeeteaneeeeeeteeteeeeeasees 64 S Sale Vonen aoeteceanth 3 EE 26 WANTING since eei ei eeter aaee a eaaa E 26 sample Imtenal 78 SCPI COMMON Commande 21 subsystem Commandes 16 Series N6700 User s Guide Index SCTECN SAVET ee 91 TEN EA eE T Bsc cnc eietrieege eddi re 88 sense leads open 35 sensitive loads arinena 40 SOCKETS aiiis a Eae EER 56 specifications characteristics ssiri 93 performance 93 bt lee EE 56 step Drogramming 66 el RE 88 SUDMet MASK sscan iini 52 53 SUP POE TAS asisas 26 switching Translents 40 synchronizing measurements ss sssssesseeesreesereeereeeee 81 Syste TEAtUTES idee 9 system protection CIB NING EE 106 CONNECTIONS seeceecseesesseseeeseeeseesteeeeeetesteaeeseeeeeeneees 106 T MQ INGE ivevsecescscesctscasses ccascett sntonevicacteatncantentensencettacsconenseioast 56 test evitenslons 70 77 transient trigger ceesesseseeseesseseesessessessessessstssseseeseeseeseass 69 turn off estate 65 t rnon delays 63 U let 89 HN be 13 updates cececsesessesecsesessesccsesecsesscsesesesscseacseesssesssseeseseeesseess 6 USB interface 20 eeccecceecccseeseesesseeseeseeseeseeeenseeeateeeeeeeeaees 49 V voltage measurement range 75 priority Modessa E 61 returning voltage data 80 SEINI DE 44 60 SUN TM sos ccc coos seca cere raster 62 vo
66. TRANsient CONTinuous is programmed it will be necessary to initiate the transient trigger system each time a triggered action is desired Trigger the Output 68 The trigger system is waiting for a trigger signal in the initiated state You can immediately trigger the output as follows Front Panel SCPI Command Select Transient Control To generate an immediate trigger on Select Trigger to generate an channel 1 immediate trigger signal regardless TRIG TRAN 1 of the trigger source setting Alternatively if the trigger source is BUS you can also program a TRG or an IEEE 488 lt get gt command As previously discussed a trigger can also be generated by another output channel or by a trigger signal applied to an input pin on the digital port connector If any of these systems are configured as the trigger source the instrument will wait indefinitely for the trigger signal If the trigger does not occur you must manually return the trigger system to the idle state The following commands return the trigger system to the idle state Front Panel SCPI Command Select Transient Control ABOR TRAN 1 Scroll to and select Abort When a trigger is received the triggered functions are set to their programmed trigger levels When the triggered actions are completed the trigger system returns to the idle state Series N6700 User s Guide Operating the Power System 4 You can test the TRAN_active bit in the operatio
67. a password In an MS DOS Command Prompt box type telnet hostname 5024 where hostname is the N6700 hostname or IP address and 5024 is the instrument s telnet port You should get a Telnet session box with a title indicating that you are connected to the power system Type the SCPI commands at the prompt Power system mainframes allow any combination of up to four simultaneous data socket control socket and telnet connections to be made Agilent instruments have standardized on using port 5025 for SCPI socket services A data socket on this port can be used to send and receive ASCII SCPI commands queries and query responses All commands must be terminated with a newline for the message to be parsed All query responses will also be terminated with a newline The socket programming interface also allows a control socket connection The control socket can be used by a client to send device clear and to receive service requests Unlike the data socket which uses a fixed port number the port number for a control socket varies and must be obtained by sending the following SCPI query to the data socket SYSTem COMMunicate TCPip CONTrol After the port number is obtained a control socket connection can be opened As with the data socket all commands to the control socket must be terminated with a newline and all query responses returned on the control socket will be terminated with a newline To send a device clear send the stri
68. am the Inhibit input on each mainframe to Latched mode Output State Only pins 4 through 7 can be configured to control the output state This function lets you connect multiple Agilent N6700 mainframes together and synchronize the output on off sequence across mainframes Refer to Appendix D for detailed information 106 Series N6700 User s Guide Series N6700 User s Guide Appendix C Power Allocation Power Limit Operation Module Power Allocation o cceecsccssssesssssesessessesseseesseeeseesavscseesevseseenseraes 109 This chapter discusses the power allocation function For the majority of Agilent N6700 Modular Power System configurations full power is available from all installed power modules However it is possible to configure a power system in which the combined ratings of the power modules exceed the power rating of the mainframe The power rating of Agilent N6700 mainframes is as follows Agilent N6700A B 400 W Agilent N6701A 600 W Agilent N6702A nominal 100 120 VAC 600 W nominal 200 240 VAC 1 200 W Note that the power system will continue to operate normally as long as the combined module output power is within the power rating of the mainframe 107 Appendix C Power Allocation Power Limit Operation Mainframe Power Limit If the combined power drawn from all of the power modules exceeds the mainframe s power rating a power fault protection event will occur This causes ALL o
69. ame in which they are installed This same value must be specified as the common delay offset for each mainframe Front Panel In the front panel menu of each mainframe select Output Sequence Couple In the Delay offset field enter the delay offset value of the slowest power module of a the mainframes in milliseconds then press Select The Max delay offset for this frame field displays the delay offset of the slowest power module in this frame SCPI Command To specify the common delay offset for each mainframe in seconds OUTP COUP DOFF 051 To return the delay offset of the slowest power module in each mainframe the maximum delay offset in seconds OUTP COUP MAX DOFF 3 Connect and configure the digital connector pins of the synchronized mainframes as described in the following section Digital Connections and Configuration Only pins 4 through 7 can be configured as synchronization pins You cannot configure more than one ON couple and one OFF couple pin per mainframe The polarity of the pins is not programmable Series N6700 User s Guide The digital connector pins of the synchronized mainframes that contain coupled channels must be connected together as shown in the following figure In this example pin 6 will be configured as the output On control Pin 7 will be configured as the output Off control The ground or Common pins also need to be connected together 115 Appendix D Output On Off Sy
70. ammed current limit in spite of changes in load line or temperature Thus when the load resistance changes the output current remains constant while the output voltage changes to accommodate the change in load All DC power modules except for Agilent N678xA power modules are designed as constant voltage sources This means that the specifications and operating characteristics are optimized for constant voltage mode operation Note that these power modules cannot be programmed to operate in a specific mode At turn on the operating mode will be determined by the voltage setting current setting and the load resistance In the following figure operating point 1 is defined by a fixed load line traversing the positive operating quadrant in the constant voltage region Operating point 2 is defined by a fixed load line traversing the positive operating quadrant in the constant current region Voltage Vmax I R 1 4 Vset aa ener a RA Ge Q D er Downprogrammer Ne gt characteristic E e E ai H I H I I l I h i i E WwW N More load geg Ba e i resistance G wee Se e l f f I f 1 I D H I l h aA Less load resistance Current 0 Iset Imax 118 Series N6700 User s Guide Autoranging Source Operating Modes Appendix E Autoranging only applies to Agilent N675xA and N676xA power modules The following figure illustrates the autoranging output characteristi
71. between ranges however the 10 pA current range must be selected manually Low current measurement Available on Agilent N678xA power modules range Current measurement can be made as low as 1 pA in the 10 pA range Digitizing speed Available on Agilent N678xA power modules 5 12 ps sample for one parameter 10 14 ps sample for two parameters System Features Choice of three interfaces GPIB IEEE 488 LAN and USB remote programming interfaces are built in Built in Web server A built in Web server lets you control the instrument directly from an internet browser on your computer SCPI language The instrument is compatible with the Standard Commands for Programmable Instruments SCPI Front panel 1 0 setup Menus let you set up GPIB and LAN parameters from the front panel Real time status The front panel indicates the status of each output It also indicates when a information protection shut down has occurred Module identification Each module has identifying data stored in non volatile memory Information includes model number serial number and options Series N6700 User s Guide 9 1 Quick Reference Model Differences Feature Precision Modules High Performance Modules DC Power Modules e available N6753A N6731B N6741B N6773A N6761A N6762A N6751A N6752A N6754A N6736B N6746B N6776A 50 W output rating e e 100 W output rating D e e 300 W output rating D D Autoranging output capability
72. c of the Agilent N675xA and N676xA power modules Point 3 shows a situation in which the voltage and current settings are such that the operating locus is limited by the maximum output power boundary of the output Depending on the power module this may be greater than the output power rating of the module In this situation the output is not guaranteed to meet its operating specifications because it is operating in an area that is outside its specified power rating Voltage Vmax Vset 1 I Downprogrammer characteristic I I I i I d More load resistance Less load resistance Current 0 Iset Imax Downprogramming Series N6700 User s Guide As shown by the dashed line on the left in the figures the power system is capable of sinking current over the output voltage range from zero volts to the rated voltage This negative current sinking capability provides fast downprogramming of the output The negative current is not programmable 119 Appendix E Source Operating Modes Agilent N678xA Multi Quadrant Operation 120 Agilent N678xA power modules can be operated in either voltage or current priority mode They can source as well as sink output power Note that Agilent N6781A 82A power modules operate only in the Voltage quadrants Voltage Priority Mode In voltage priority mode the output voltage should be programmed to the desired positive or negative val
73. canddcdinadten 16 This chapter concisely describes the operation of the Agilent N6700 Modular Power System MPS This chapter does not describe every operating feature in detail It is simply a quick reference guide to quickly become familiar with the essential operating features of the power system For complete details on the SCPI Standard Commands for Programmable Instruments commands refer to the Programmer s Reference Help file included on the Agilent N6700 Product Reference CD This CD ROM is shipped along with your instrument Unless otherwise noted the Agilent N6700 Modular Power System will also be referred to as MPS and power system throughout this manual Series N6700 User s Guide 1 Quick Reference The Agilent N6700 Modular Power System At a Glance The Agilent N6700 Modular Power System is a configurable one rack unit 1U platform that lets you mix and match power modules to create a power system optimized for your test system requirements Agilent N6700 N6702 MPS mainframes are available in power levels of 400 W 600 W and 1 200 W Up to four power modules can be installed in each mainframe Power modules come in power levels of 20 W 50 W 100 W and 300 W have various voltage and current combinations and provide the following performance features The N673xB N674xB and N677xA DC Power Modules provide programmable voltage and current measurement and protection features making th
74. ct it for any obvious damage that may have occurred during shipment If there is damage notify the shipping carrier and nearest Agilent Sales and Support Office immediately Refer to www agilent com find assist Until you have checked out the power system save the shipping carton and packing materials in case the unit has to be returned Check the list under Items Supplied and verify that you have received these items with your instrument If anything is missing please contact your nearest Agilent Sales and Support Office Series N6700 User s Guide 25 2 AN Installing the Unit 26 Installation Safety Considerations Environment This power system is a Safety Class 1 instrument which means it has a protective earth terminal That terminal must be connected to earth ground through a power source equipped with a ground receptacle Refer to the Safety Summary page at the beginning of this guide for general safety information Before installation or operation check the power system and review this guide for safety warnings and instructions Safety warnings for specific procedures are located at appropriate places throughout this Guide Do not operate the instrument in the presence of flammable gasses or fumes The environmental conditions of the instrument are documented in Appendix A Basically the instrument should only be operated indoors in a controlled environment The dimensions of your instrument as well as a
75. d Select Measure Range To set the 5 V measurement range Select the lower measurement SENS VOLT RANG 5 1 range from the voltage or current To set the 1 A measurement range dropdown menu Then press Select SENS CURR RANG 1 1 71 4 Operating the Power System 78 Seamless Measurement For Agilent Models N6781A and N6782A only you can select seamless voltage or current measurements The Auto selection provides seamless measurement ranging which results in a wide dynamic range with no data being lost across ranges Autoranging does not include the 10 pA range which must be selected manually Front Panel SCPI Command Not Available To select seamless current Autoranging SENS CURR RANG AUTO 1 Adjust the Measurement Sample Rate The following figure illustrates the relationship between measurement samples or points and the time interval between samples in a typical measurement TRIGGER MEASUREMENT OCCURS SAMPLE POINT cal TIME INTERVAL BETWEEN SAMPLES lt _ ACQUISITION TIME TIME INTERVAL X SAMPLES 1 You can vary the measurement data sampling rate as follows Front Panel SCPI Command Select Measure Sweep For example to set the time interval Enter the points and press Select to Blus with 4096 samples use Scroll to Time Interval enter a SENS SWE TINT 60E 6 1 SENS SWE POIN 4096 1 value and press Select again The shortest time int
76. d editions are identified by a new printing date Declaration of Conformity Declarations of Conformity for this product and for other Agilent products may be downloaded from the Web Go to http regulations corporate agilent com and click on Declarations of Conformity You can then search by product number to find the latest Declaration of Conformity Waste Electrical and Electronic Equipment WEEE Directive 2002 96 EC This product complies with the WEEE Directive 2002 96 EC marketing requirement The affixed product label see below indicates that you must not discard this electrical electronic product in domestic household waste Product Category With reference to the equipment types in the WEEE directive Annex 1 this product is classified as Monitoring and Control instrumentation product Do not dispose in domestic household waste To return unwanted products contact our local Agilent office or see www agilent com environment product for more information ms Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology to the extent allowed by the Institute s calibration facility and to the calibration facilities of other International Standards Organization members Certif
77. defined Group multiple channels to create a single output Removes the specified channel from a group Ungroups all channels Series N6700 User s Guide SCPI Command SYSTem continued PASSword FPANel RESet REBoot VERSion TRIGger ACQuire IMMediate chanlist CURRent LEVel lt NRf gt chanlist SLOPe POSitive NEGative chanlist SOURce BUS CURRent lt 1 4 gt EXTernal PIN lt 1 7 gt TRANsient lt 1 4 gt VOLTage lt 1 4 gt chanlist TOUTput ENABle lt Bool gt chanlist VOLTage LEVel lt NRf gt chanlist SLOPe POSitive NEGative chanlist TRANsient MMediate chanlist SOURce BUS EXTernal IMMediate PIN lt 1 7 gt TRANsient lt 1 4 gt chanlist Quick Reference Description Resets the front panel lock password to zero Returns the unit to its power on state Returns the SCPI version number 1 Acquire commands only on N676xA N678xA and Option 054 Triggers the measurement immediately Sets the current trigger level Sets the current trigger slope Sets the measurement trigger source Enables measurement triggers to be sent to a digital port pin Sets the voltage trigger level Sets the voltage trigger slope Triggers the output immediately Sets the output trigger source Common Commands Command Description CLS Clear status ESE lt NRf gt Standard event status enable ESR Return event status register IDN Return inst
78. display all channels 91 Appendix A Specifications Agilent Models N6731B N6736B N6741B N6746B ues 94 Agilent Models N6751A N6752A N6753A N6754A N6761A N6762A 95 Agilent Models N6773A NGIIDA ENEE 96 Agilent Models N6781A NG I97A ENEE 97 Agilent N6700B N6701A N6702A MPS Manlames 98 This chapter lists the specifications and supplemental characteristics of the Agilent N6700 Modular Power System A dimensional line drawing of the mainframe is included at the end of the chapter Unless otherwise noted specifications are warranted over the ambient temperature range of 0 to 55 C after a 30 minute warm up period Specifications apply at the output terminals with each power module s sense terminals externally jumpered directly to their respective output terminals local sensing Refer to the Agilent N6700 Service Guide for the setup conditions for all power module specifications Complete specifications and supplemental characteristics information for all power modules are included in the Agilent N6700 Series Power Modules Specifications Guide This document is available on the Agilent N6700 Product Reference CD that is shipped along with your instrument as well as on the web at www agilent com find N6700 Series N6700 User s Guide Supplemental characteristics are not warranted but are descriptions of performance determined either by design or type testing All supplemental characteristics are typical unless oth
79. e AC line switch can inject common mode current spikes into the DC output leads resulting in voltage spikes that may damage loads that are highly sensitive to voltage or current transients Note that any electronic device meeting international standards for EMI compliance is likely to generate similar current spikes This situation arises from the presence of EMI filters at both the AC input and the DC output These filters typically include common mode capacitors connected to the chassis of the power system Since the AC input has an earth ground any load that is also earth grounded provides a possible return path for common mode currents The following figure illustrates a typical situation where a load that might otherwise be floating becomes grounded thereby providing a return path for any injected currents In this case the return path is Series N6700 User s Guide Installation 2 created by the low side of the scope probe which is connected to the load circuit common and also to the scope s chassis For this and similar cases the following steps by order of preference will help mitigate common mode current spikes appearing at the output when the power system is turned on or off by the AC line switch 1 Install the ferrite core on the power cord as described under Snap On Core This inserts impedance in the current path 2 Install a separate bonding wire from the load s common point to the ground terminal of the pow
80. e data when calculating average measurements This attenuates the AC noise in the measurement window The best attenuation is achieved when at least three or more waveform cycles are in the measurement To select a window function use Front Panel SCPI Command Select Measure Window To set the sense window to Hanning Then select either Rectangular or for output 1 use Hanning and press Select SENS WIND HANN 1 Measure and Retrieve Array Data Array queries return all values in the voltage and current measurement buffer No averaging is applied only raw data is returned from the buffer The following commands initiate and trigger a measurement and return the measurement array Front Panel SCPI Command Not Available MEAS ARR VOLT 1 MEAS ARR CURR 1 When a remote interface measurement is in progress the front panel display may indicate Front panel measurements resume when the remote measurement completes 80 Once a measurement finishes you may wish to retrieve the array data without initiating a new measurement Use FETCh queries to return the array data from the last measurement Fetch queries do not alter the data in the measurement buffer The commands are Front Panel SCPI Command Not Available FETC ARR VOLT 1 FETC ARR CURR 1 If a FETCh query is sent before the measurement is started or before it is finished the response will be delayed until the meas
81. e is installed in slots 3 and 4 it is assigned channel number 3 Power modules that are connected in parallel and have been configured or grouped to act as a single higher power channel are addressed using the channel number of the lowest channel in the group 400 Hz Operation Cleaning Redundant Ground Requirement At 400 Hz AC input operation the leakage current of the unit exceeds 3 5 mA This requires the installation of a permanent redundant ground from the instrument chassis to earth ground This ensures that ground will always be connected and that any leakage current will be diverted to ground Refer to the Service Guide for installation instructions Power Factor At 400 Hz AC input operation the unit s power factor is affected as follows Under full load at 400 Hz power factor drops from 0 99 120 VAC to as low as 0 76 265 VAC Power factor degrades further under no load conditions SHOCK HAZARD To prevent electric shock unplug the unit before cleaning Use a dry cloth or one slightly dampened with water to clean the external case parts Do not attempt to clean internally Series N6700 User s Guide Connecting the Line Cord Installation 2 FIRE HAZARD Use only the power cord that was supplied with your instrument Using other types of power cords may cause overheating of the power cord resulting in fire SHOCK HAZARD The power cord provides a chassis ground through a third conductor
82. e restored by selecting the Reset control located in the System Admin Nvram menu 57 3 Getting Started Factory shipped non volatile LAN settings Get IP Address Automatic Dynamic DNS naming service Enabled IP Address 169 254 67 0 NetBIOS naming service Enabled Subnet Mask 255 255 0 0 Domain name Blank Default Gateway 0 0 0 0 TCP keepalive Enabled Obtain DNS server from DHCP Enabled TCP keepalive seconds 1800 DNS server Blank Ethernet Auto negotiation Enabled Host name A N67Xxx XXXXX Ping server Enabled Web password Blank Other factory shipped non volatile settings Admin Calibration password 0 zero On Off key affects all channels Disabled Calibration date March 5 2003 Output Inhibit mode Off Channel grouping No groups Saved states RST command Digital port function all pins Digital In Screen contrast 50 Digital port polarity all pins Positive Screen saver Enabled Front panel lockout Disabled Screen saver delay 60 minutes Front panel meter view 1 channel USB interface Enabled GPIB Address 5 Wake on L 0 Enabled Key clicks Enabled Web server Enabled LAN interface Enabled 58 Series N6700 User s Guide Series N6700 User s Guide 4 Operating the Power System Programing the Output edel donee 60 Synchronizing Output Steps ani a a 66 Programming Output Lists csitanssiinndnaianiidianadindianianadnis 70 Making Measurements EEN 75 Using the Du E EE 71 Using the Protection Functions ssssssssss
83. e to recover to within the settling band following a load change from 50 to 100 and from 100 to 50 of full load Voltage settling band 0 3 V NOTE 3 Time lt 250 us 1 Output current is derated 1 per C above 40 C 0 3 V NOTE3 lt 250 us 0 5V lt 250 us 2 When relay Option 760 is installed on Model N6773A the maximum output current will be limited to 10 A 3 When relay Option 760 or 761 is installed the settling band is 0 35 V 96 1 0V lt 250 us Series N6700 User s Guide Specifications Appendix A Agilent Models N6781A N6782A N6784A Performance Specifications N6781A N6782A N6784A DC Output Ratings Voltage 20V 20V 20V Current derated 1 per C above 30 C 3A 3A 3A Power 20 W 20 W 20 W N6781A Auxiliary Voltage Measurement Input Voltage rating 20V N A N A Output Voltage Ripple amp Noise PARD from 20 Hz 20 MHz Measured at front panel terminals with no load in Voltage Priority mode Output Bandwidth setting Low CV peak to peak 12 mV 12 mV 12 mV CV rms 1 2 mV 1 2 mV 1 2 mV Load Effect Load regulation For any load change based on a load lead drop 1 0 V The load lead drop reduces the maximum available voltage at the load Voltage 20 V range 700 pV 700 pV 700 pV Voltage 6 V range 400 pV 400 pV 400 pV Current 3 A range 100 pA 100 pA 100 pA Current 1 A range 50 pA 50 pA 50 pA Current 300 mA range 50 pA 50 pA N A Current 100 mA amp 10 mA range
84. elay this delay will be added to the minimum delay offset resulting in a turn on delay that is actually longer than the one you programmed The minimum delay offset is shown in the following table Power Modules Options and Mode Minimum Delay Offset N673xB N674xB N677xA Without relays 32 ms With relay option 760 58 ms N6751A N6752A Without relays 25 ms With relay option 760 51 ms N6753A N6754A Without relays 18 ms With relay option 760 44 ms N6761A N6762A Without relays 32 ms With relay option 760 58 ms Without relays Current priority 23 ms With relay option 760 Current priority 45 ms N6781A N6782A With turn off mode set to Low Z 23 6 ms With turn off mode set to High Z 22 8 ms To determine which power modules are installed in your mainframe select System About Module from the front panel This identifies the power module and the installed options If N676xA power modules are installed send the OUTP PMODE query to determine if Current priority mode has been set To determine the actual turn on delay between the on event such as pressing the Output On key or sending an Output On command you must add the programmed turn on delay to the minimum delay offset as shown in the following example In this example if you program delay values of 10 ms 20 ms 30 ms and 40 ms for output channels 1 through 4 respectively the actual output delays will be 68 ms 45 ms 81 ms and 72 ms for output channels 1 through 4
85. ent Trigger Source An immediate trigger command over the bus will generate an immediate trigger regardless of the trigger source Bus Pin lt n gt Transient lt n gt Ext Series N6700 User s Guide Unless you are using a TRIGger ACQuire command to trigger the measurement select a trigger source from the following Selects GPIB device trigger TRG or lt GET gt Group Execute Trigger Selects a pin on the external port connector as the trigger source lt n gt specifies the pin number The selected pin must be configured as a Trigger Input in order to be used as a trigger source see Appendix B Selects the output channel e transient system as the trigger source lt n gt specifies the channel When you select a channel you must also set up that channel s transient system to generate a trigger out signal See Generate Trigger Out Signals and Program an Arbitrary List earlier in this chapter Selects any pin configured as a trigger input as the trigger source 81 4 Operating the Power System Use the following commands to select a trigger source Front Panel SCPI Command Not Available To select Bus triggers for output 1 TRIG ACQ SOUR BUS 1 To select a Digital pin as the trigger TRIG ACQ SOUR PIN lt n gt 1 To select a Transient output as trigger TRIG ACQ SOUR TRAN lt n gt 1 where n is the output channel that will generate the trigger signal Initiate the Measurement Tr
86. enu select To query the delay offset of the Output Sequence Couple slowest power module in the The Max delay offset for this frame mainframe the maximum delay field displays the delay offset of the offset in seconds slowest power module in the frame OUTP COUP MAX DOFF Enter this value into the Delay offset To specify the common delay offset field in milliseconds then press for the mainframe in seconds Select OUTP COUP DOFF 051 Program the Output Relays Series N6700 User s Guide Output relay availability and options are described in Chapter 1 under Model Differences Option 761 provides double pole double throw relays that disconnect both the output and sense terminals Option 760 is the same as option 761 but adds output reversal relays If you have Option 761 installed the normal operating mode of the relay is to open and close as the output is turned on or off The relays are only opened or closed when the output is at a safe state zero voltage zero current Note however that you can program the output state on or off while leaving the relay state unchanged 63 4 Operating the Power System Front Panel SCPI Command Not Available To leave the relays closed when output 1 is turned off OUTP OFF NOR 1 To leave the relays open when output 1 is turned on OUTP ON NOR 1 If you have Option 760 installed you can also reverse the polarity of the output and sense terminals Note that this comma
87. er s Guide Safety Notices The following general safety precautions must be observed during all phases of operation of this instrument Failure to comply with these precautions or with specific warnings or instructions elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Agilent Technologies assumes no liability for the customer s failure to comply with these requirements General Do not use this product in any manner not specified by the manufacturer The protective features of this product may be impaired if it is used in a manner not specified in the operation instructions Before Applying Power Verify that all safety precautions are taken Make all connections to the unit before applying power Note the instrument s external markings described under Safety Symbols Ground the Instrument This product is a Safety Class 1 instrument provided with a protective earth terminal To minimize shock hazard the instrument chassis and cover must be connected to an electrical ground The instrument must be connected to the AC power mains through a grounded power cable with the ground wire firmly connected to an electrical ground safety ground at the power outlet Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury Fuses The instrume
88. er system This provides a lower impedance path that helps direct injected currents away from the DC output leads and the sensitive load 3 Break the return path through the external equipment For example instead of the single ended scope shown in the figure you can use a differential scope with a floating input or you can connect an isolated measuring instrument to the load Scope d robe TT Ss N6700 Modular VE Power System K Disconnecting the load from the output before switching the power system on or off will always protect the load from common mode currents Series N6700 User s Guide 41 2 Installation Connecting the Auxiliary Voltage Measurement Input This information applies to Agilent Model N6781A only The auxiliary voltage measurement input is located on the rear panel of the Agilent N6781A It is primarily used for battery voltage rundown measurements but it is also suitable for general purpose DC measurements between 25 VDC As shown in the following figure auxiliary voltage measurements cannot be made on test points that are at a greater potential than 25 VDC from Common Refer to chapter 4 under Making Measurements for more information CAUTION When using the auxiliary voltage measurement input on Model N6781A no output terminal or measurement input terminal may be more than 60 VDC from any other terminal and chassis ground A AUX Voltage Measure
89. erates in constant voltage mode and the output voltage is no longer held constant Instead the power supply will now regulate the output current at its current limit setting Either a LIM positive current limit or LIM negative current limit status flag is set to indicate that a current limit has been reached As shown by the vertical portions of the load line when the unit is sinking power the output voltage may continue to increase in the positive or negative direction as more current is forced into the unit When the output voltage exceeds either the positive or negative over voltage setting the output will shut down the output relays will open and either the OV or OV and the PROT status bits will be set Either the user defined over voltage setting or the local over voltage function can trip the over voltage protection Current Priority Mode In current priority mode the output current should be programmed to the desired positive or negative value A positive voltage limit value should also be set The voltage limit should always be set higher than the actual output voltage requirement of the external load With tracking enabled the negative voltage limit tracks the positive voltage limit setting With tracking disabled you can set different values for the positive and negative voltage limits The following figure shows the current priority operating locus of the power modules The area in the white quadrants shows the output
90. erval fastest speed that can be specified depends on the number of parameters that are being measured and the model that is doing the measuring The default time interval at power on for all measurements is 20 48 microseconds Time intervals above 20 48 are rounded to the nearest multiple of 20 48 1 parameter N678xA only 5 12 microseconds 1 or 2 parameters all modules 10 24 microseconds 3 or 4 parameters all modules 20 48 microseconds The maximum number of sample points that are available for all measurements is 512 K points If you specify a voltage measurement with 500 K points on channel 1 for example you will only have 12 K points available for all other measurements Series N6700 User s Guide Operating the Power System 4 Acquire Pre trigger Data The measurement system lets you capture data before after or at the trigger signal As shown in the following figure you can move the block of data being read into the acquisition buffer with reference to the trigger This allows pre or post trigger data sampling 4096 DATA POINTS OFFSET 4095 4096 DATA POINTS OFFSET 2048 4096 DATA POINTS OFFSET 0 9 OFFSET 0 to 2 gt 4096 DATA POINTS TIME TRIGGER To offset the beginning of the acquisition buffer relative to the acquisition trigger use Front Panel SCPI Command Select Measure Sweep To offset the measurement on Enter an offset val
91. erwise noted 93 Appendix A Specifications Agilent Models N6731B N6736B N6741B N6746B Performance Specifications N6731B N6732B N6733B N6734B N6735B N6736B N6741B N6742B N6743B N6744B N6745B N6746B DC Output Ratings Voltage 5V 8V 20 V 35 V 60 V 100 V NOTE 2 Current NOTE 1 10A 20A 6 25A 125A 25A 5A 15A 3A 08A 16A 05A 1A Power 5OW 100W 3 50W 100W 50W 100W 52 5W 105W 50 W 100 W 50 W 100 W Output Ripple and Noise PARD from 20 Hz 20 MHz CV peak to peak 10 mV 20 mV 12 mV 14 mV 15 mV 25 mV 30 mV CV rms 2 mV 2 mV 3 mV 5 mV 9 mV 18 mV Load Effect Regulation Applies for any output load change with a maximum load lead drop of 1V lead The load lead drop reduces the maximum available voltage at the load Voltage 5 mV 6 mV 9 mV 11 mV 13 mV 16 mV 20 mV 30 mV Current 2mA 2mA 2mA 2mA 2mA 2mA Source Effect Regulation Voltage 1 mV 2 mV 2 mV 4 mV 6 mV 10 mV Current 1mA 1mA 1mA 1mA 1mA 1mA Programming Accuracy 23 C 5 C after 30 minute warm up Applies from minimum to maximum programming range at any load 0 1 19 mV 0 15 20 mA 0 1 19 mV 0 15 20 mA 0 1 20 mV 0 15 20 mA Voltage Current 0 1 35 mV 0 15 20 mA 0 1 60 mV 0 15 20 mA 0 1 100 mV 0 15 10mA Voltmeter Ammeter Measurement Accuracy at 23 C 5 C Voltage 0 1 20 mV 0 1 20 mV 0 1 20 mV 0 1 35 mV 0 1 60 mV 0 1 100 mV Current 0 15 20mA 0 1
92. es either voltage priority or current priority may be list controlled List mode lets you generate complex sequences of output changes with rapid precise timing which may be synchronized with internal or external signals Lists can contain up to 512 individually programmed steps and can be programmed to repeat themselves The voltage and current lists are paced by a separate list that defines the duration or dwell of each step Each of the up to 512 steps can have an individual dwell time associated with it which specifies the time in seconds that the list will remain at that step before moving on to the next step Dwell times can be programmed from 0 to 262 144 seconds The default dwell time is 0 001 seconds If you need an output list to closely follow external events then a trigger paced list is more appropriate In a trigger paced list the list advances one step for each trigger received As previously discussed a number of trigger sources can be selected to generate triggers With a trigger paced list you do not need to program a dwell time for each step If you do program a dwell time triggers that are received during the dwell period are ignored Voltage and current lists can also be configured to generate trigger signals at specified steps This is accomplished by two additional lists a beginning of step BOST and an end of step EOST list These lists define which steps will generate a trigger signal and if the trigger occu
93. ese economical models suitable for powering the device under test or system resources such as fixture controls The N675xA High Performance Autoranging DC Power Modules provide low noise high accuracy fast programming times and advanced programming and measurement capabilities to speed test throughput The N676xA Precision DC Power Modules provide precise control and measurements in the milli and micro ampere region with the ability to simultaneously digitize voltage and current and capture those measurements into an oscilloscope like data buffer Agilent N678xA Source Measure Units have a multiple quadrant power mesh with separate voltage and current priority source modes These models are optimized for specific applications such as battery drain analysis and functional testing The output and system features are described in the following sections Not all output features are available on every power module The Model Differences section describes the features that apply only to specific power modules Output Features Programmable voltage and current Low output noise Fast up down programming Fast transient response Output autoranging capability Full programming capability is provided for the entire range of output voltage and current Outputs can operate as either constant voltage CV or constant current CC sources Available on Agilent N676xA and N675xA power modules Output noise is lt 4 5 mV peak to peak
94. ess Select OUTP PROT WDOG DEL 600 Set the Oscillation Protection This information applies to Agilent Model N678xA only If open sense leads or capacitive loads outside the allowable range cause the output to oscillate the oscillation protection function detects the oscillation and latches the output off The condition is annunciated on the front panel by the OSC status annunciator Front Panel SCPI Command Select Protect OSC To enable oscillation protection for Check the OSC box and press output 1 Select VOLT PROT OSC ON 1 2 Clear Output Protection Functions If an over voltage over current over temperature power fail condition power limit condition protection condition or inhibit signal occurs the power system turns off the affected output channel The appropriate operating status indicator on the front panel will be on To clear the protection function and restore normal operation first remove that condition that caused the protection fault Then clear the protection function as follows Front Panel SCPI Command Select Protect Clear To clear a protection fault on output 1 Select the Clear button OUTP PROT CLE 1 Series N6700 User s Guide 87 4 Operating the Power System System Related Operations 88 Self Test A power on self test occurs automatically when you turn on the power system This test assures you that the instrument is operational If the self test is successful the power
95. figures the Dynamic DNS and NetBIOS naming service Domain Configures the Domain Name DNS Configures the DNS server TCP Configures the TCP keepalive function Reset Resets the LAN interface settings to the factory shipped state USB Status Displays status speed packets received and packets sent Identification USB connect string the instrument s unique USB identifier GPIB Selects the GPIB address DigPort Pins lt 1 gt Function Specifies the pin function DigIn DiglO Trigin TrigOut FaultOut Pins lt 2 gt Function Specifies the pin function DigIn Dal Trigin TrigOut Pins lt 3 gt Function Specifies the pin function DigIn DiglO Trigln TrigOut Inhibitin Pins lt 4 7 gt Function Specifies the pin function DigIn Dal Trigin TrigOut OnC OffC Pins lt 1 7 gt Polarity Specifies the pin polarity Positive Negative Data Sends reads data from the digital 1 0 port Groups Defines groups of output channels that are connected in parallel Preferences Display Contrast Configures the display contrast Saver Configures the screen saver and wake on I O timer View Selects 1 channel or 4 channel view at turn on Keys Enables disables key clicks and configures the On Off key Lock Locks front panel keys Enter a password to unlock the front panel Admin Login Logout Enter a password to access the admin functions Cal Volt Vprog Calibrates High and Low voltage ranges Viim Calibrates voltage limit High and Low ranges Vmeas Calibrates High Low a
96. ge and current step value Enables step triggers List Pace Specifies Dwell or Trigger paced list Repeat Specifies number of list repetitions or specifies continuous list Terminate Specifies list settings when the list terminates Config Configures list step voltage current dwell and trigger signals Reset Aborts the list and resets all list parameters TrigSource Specify the trigger source Bus Tran 1 4 Pin 1 7 Ext Control Initiates Triggers or Aborts output triggers Displays trigger state Protect OVP Configures over voltage protection function ocP Configures over current protection function Inhibit Configures the external inhibit signal Off Latching Live Coupling Disables ALL output channels when a protection fault occurs Wdog Configures the output watchdog timer Osc Enables disables oscillation protection on Models N678xA Clear Clears output protection Displays output state States Reset Resets the instrument to its reset RST state SaveRecall Saves or recalls an instrument state PowerOn Selects the power on state RST RCLO 14 Series N6700 User s Guide Menu Command Quick Reference 1 Control Description System 10 LAN ActiveSettings Displays the LAN interface settings that are presently active Config IP Configures the IP addressing of the instrument Name Con
97. gger use Front Panel SCPI Command Select the Transient Control To program output 1 use Select Initiate and Press Select INIT TRAN 1 Step 10 Trigger the output pulse or pulse train 72 Front Panel SCPI Command Select Transient Control TRG Select Trigger and Press Select Series N6700 User s Guide Operating the Power System 4 Program an Arbitrary List The following procedure shows how to generate the list of voltage changes as illustrated in the following figure Trigger it H y 0 1 2 3 4 5 List Count 1 List Count 2 lt Step 1 Set the function voltage or current for which you want to generate a list to List mode This example programs a voltage list Front Panel SCPI Command Select Transient Mode Set the To program output 1 use Voltage mode to List Press Select VOLT MODE LIST 1 Step 2 Program the list of values for the List function The order in which the values are entered determines the order in which the values will be output To generate the voltage list shown in the figure a list may include the following values 9 0 6 0 3 O Front Panel SCPI Command Select Transient List Config To program output 1 use Select the List Step number and LIST VOLT 9 0 6 0 3 0 1 enter a voltage value Press Select Repeat this for each step Use the t keys to select the next step
98. gh impedance or low impedance mode at output turn on and turn off Low impedance At turn on the output relays are closed after which the output is programmed to the set value At turn off the output is first programmed to zero after which the output relays are opened High impedance At turn on the output is programmed to the set value after which the output relays are closed At turn off the output relays are opened while the output remains at its set value This reduces current pulses that may be undesirable in some applications Front Panel SCPI Command Select Output Advanced Tmode To set output 1 to a high impedance Select either High Impedance or mode Low impedance and press Select OUTP TMOD HIGHZ 1 65 4 Operating the Power System Synchronizing Output Steps The transient system lets you step the output voltage and current up or down in response to triggered events To generate a triggered output step you must L Enable the output to respond to trigger commands 2 Set the voltage or current trigger levels 3 Select the transient trigger source 4 Initiate the trigger system and provide a trigger signal Enable the Output to Respond to Trigger Commands First you must enable the output to respond to trigger commands Unless an output is enabled to respond to triggers nothing will happen even if you have programmed a trigger level and generated a trigger for the output Use the following commands to enab
99. hannel to generate a fault signal on the Digital Control port The following conditions will generate a fault event over voltage over current over temperature inhibit signal power fail condition or on some models a power limit condition Both pins 1 and 2 are dedicated to this function This provides for an optically isolated output Pin 2 s function is ignored Note that the Fault output signal remains latched until the fault condition is cleared You must also clear the protection circuit Front Panel SCPI Command Select System 1I0 DigPort Pins To configure the Fault function Select pin 1 then Function then DIG PINE FUNG FAUL Fault Out In the Polarity field To select the fault output polarity y a DIG PIN1 POL lt pol gt select either Positive or Negative S 2 po Pin 3 can be configured as a remote inhibit input The polarity of pin 3 can also be configured Pin 8 is the common for pin 3 The Inhibit Input function lets an external input signal control the output state of all of the output channels in the mainframe The signal latency is 5 microseconds Pin 3 can be programmed for the following Inhibit modes which are stored in non volatile memory Causes a logic true transition on the Inhibit input to disable all outputs The outputs will remain disabled after the inhibit signal is received Allows the enabled outputs to follow the state of the Inhibit input When the Inhibit input is true the outputs are
100. ication Exclusive Remedies THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE AND EXCLUSIVE REMEDIES AGILENT TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY Assistance This product comes with the standard product warranty Warranty options extended support contacts product maintenance agreements and customer assistance agreements are also available Contact your nearest Agilent Technologies Sales and Service office for further information on Agilent Technologies full line of Support Programs Technologies Licenses The hardware and or software described in this document are furnished under a license and may be used or copied only in accordance with the terms of such license U S Government Restricted Rights Software and technical data rights granted to the federal government include only those rights customarily provided to end user customers Agilent provides this customary commercial license in Software and technical 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 Computer Software Documentation Trademarks Microsoft and Windows are U S registered trademarks of Microsoft Corporation Series N6700 Us
101. igger System Next you must initiate or enable the measurement trigger system When the power system is turned on the trigger system is in the idle state In this state the trigger system is disabled ignoring all triggers The INITiate commands enable the trigger system to receive triggers To initiate the trigger system use Front Panel SCPI Command Not Available To initiate the measurement trigger system INIT ACQ 1 It takes a few milliseconds for the instrument to be ready to receive a trigger signal after receiving the INITiate ACQuire command and it can take longer for Agilent Models N678xA If a trigger occurs before the trigger system is ready for it the trigger will be ignored You can test the WTG_meas bit in the operation status register to know when the instrument is ready to receive a trigger after being initiated Front Panel SCPI Command Not Available To query the WTG_meas bit bit 3 STAT OPER COND 1 If a bit value of 8 is returned in the query the WTG_meas bit is true and the instrument is ready to receive the trigger signal Refer to the N6700 Programmer s Reference Help file for more information It will be necessary to initiate the measurement trigger system each time a triggered measurement is desired 82 Series N6700 User s Guide Series N6700 User s Guide Operating the Power System 4 Trigger the Measurement The trigger system is waiting for a trigger signal in the initia
102. in the figure Use four plain 10 32 screws to install the rear ears Step 4 Slide the instrument into the rack making sure that the rear extender supports are aligned inside the rear ears Step 5 Attach the front ears to the front of the instrument rack using the four dress 10 32 screws provided Step 6 This is optional Insert a plain 10 32 screw through the slot of the rear ear and extender support Attach it with a clip nut Note that this will prevent the unit from being slid out of the front of the rack Bench Installation CAUTION Do not block the air intake and exhaust at the sides or the exhaust at the rear of the unit Refer to the outline diagram in Appendix A Minimum clearances for bench operation are 2 inches 51 mm along the sides and back Series N6700 User s Guide 27 2 28 Installation Channel Number The channel number of a power module is determined by the location of that module in the mainframe When viewed from the rear the module next to the GPIB connector is always output channel one Numbering continues sequentially to the left from one to four If there are less than four modules channel numbering corresponds to the actual number of installed power modules Unused channel slots must contain filler modules to ensure proper airflow for cooling Double wide power modules are assigned the channel number of the lowest numbered slot in which is installed For example if a double wide modul
103. inframe Installs on power cord to reduce common mode currents One 8 pin connector for connecting signal lines to the digital port Shipped with mainframe Includes drivers and documentation Shipped with mainframe Contains Agilent IO Libraries Suite Shipped with mainframe Torx tool for installing or removing power modules One 8A 8 pin connector plug for connecting power and sense leads Only used in N678xA One 12A 4 pin connector plug for connecting power and sense leads Used in all except N6731B N6741B N6754A N6773A One 20A 4 pin connector plug for connecting power and sense leads Only used in N6731B N6741B N6754A N6773A One 50A 2 pin connector plug for connecting power leads Only used in N6753A A 2 pin connector plug for connecting the auxiliary measurement inputs Only used in N6781A Two small jumpers for local sensing at the output connector Used in all except N6731B N6741B N6754A N6773A Two large jumpers for local sensing at the output connector Only used in N6731B N6741B N6754A N6773A A 4 pin connector for connecting sense leads Wires p n 5185 8847 are used for local sensing Only used in N6753A A certificate of calibration referenced to the serial number Call Agilent Sales amp Support Office Agilent 9170 2131 Agilent 1253 6408 Phoenix Contact MC 1 5 8 ST 3 5 Agilent 5969 2914 Agilent E2094N Agilent 8710 2416 Agilent 1253 6408 Phoenix Contact MC 1 5 8 ST 3 5 Agilent
104. ion from a coupled channel Front Panel Keys At a Glance System keys Meter returns the display to metering mode Menu accesses the command menu Channel selects or highlights a channel to control Back backs out of a menu without activating any changes Help accesses information about the displayed menu control Error displays any error messages in the error queue Navigation keys Q sa The Arrow keys let you move around in the command menus The Select key lets you make a selection in the command menus It also lets you enter edit mode for numeric parameters Output keys On Off Voltage On Off controls the selected output or all outputs when All is lit This key is only active in Single channel or Multiple channel view Voltage lets you change the voltage setting of the selected channel Current lets you change the current setting of the selected channel Number keys 7 8 olif 4 5 6 4 1 2 3 E L Enter Series N6700 User s Guide The 0 through 9 keys enter numbers The key is the decimal point The key is only used to enter a minus sign The E key enters an exponent Add the value to the right of the E The backspace key deletes digits as it backspaces over them The E arrow keys increment or decrement the voltage or current settings They are also used to select letters in alphabetic entry fields The Enter key enters a
105. last five characters of the 10 character mainframe serial number located on the label on the top of the unit e g 45678 if the serial number is MY12345678 A N6700B 45678 is an example of a hostname Use Dynamic DNS Registers the hostname using the Dynamic DNS naming system naming service Use NetBIOS Registers the hostname using the RFC NetBIOS naming protocol naming service Domain Select Domain if your DNS server requires an instrument to register not only the hostname but also the domain name Domain name Registers the Internet domain for the instrument The Domain must start with a letter and may contain upper and lower case letters numbers dashes and dots Use the navigation keys to enter an alpha character Use the up down navigation or arrow keys to select a letter from the alphabetic choices as you scroll through the selections Use the number keys to enter a number Series N6700 User s Guide 53 3 Getting Started 54 Obtain DNS server from DHCP Use the following DNS server DNS Server DNS Select DNS to configure the Domain Name System DNS setup of the instrument DNS is an internet service that translates domain names into IP addresses It is also needed for the instrument to find and display its hostname assigned by the network Select this item to obtain the DNS server address from DHCP You must have enabled DHCP in the IP menu Select this item if you are not using DHCP or need to connect to
106. le an output to respond to triggers Front Panel SCPI Command Select Transient Mode To enable the voltage function on For voltage step triggering set the output 1 to respond to triggers use VOLT MODE STEP 1 To enable the current function on output 1 to respond to triggers use CURR MODE STEP 1 Voltage mode to Step For current step triggering set the Current mode to Step Then press Select In Step mode the triggered value becomes the immediate value when the trigger is received In Fixed mode trigger signals are ignored the immediate values remain in effect when a trigger is received Set the Voltage or Current Trigger Levels Next use the following commands to program an output trigger level The output will go to this level when the trigger is received If you have a model that has multiple ranges the selected triggered voltage and current settings must be within the same range that the output channel is presently operating in Front Panel SCPI Command Select Transient Step To set a voltage and current trigger Select the Trig Voltage box to set level for output 1 use the voltage Select the Trig Current VOLT TRIG 15 1 box to set the current Enter a value CURR TRIG 1 1 and press Select 66 Series N6700 User s Guide Select the Transient Trigger Source Operating the Power System 4 An immediate trigger command either from the front panel or over the bus will
107. ll be 10 ms 20 ms 30 ms and 40 ms the exact values originally specified If you have previously characterized the minimum turn on delays of the power modules that you are synchronizing and have incorporated this delay in your application program you do not need to rewrite your test program Your application will continue to work as before Procedure Series N6700 User s Guide To configure the output turn on delays Enable the turn on synchronization function on the mainframe Specify the output channels that will be synchronized or coupled Specify the user programmed turn on delay for each output channel that will be synchronized 4 This step is required if you have power modules with different minimum delay offsets Specify a common delay offset for all of the synchronized output channels When the common delay offset completes the user programmed turn on delays will start 1 Enable the Synchronization Function Output turn on synchronization must be enabled on the mainframe Front Panel SCPI Command In the front panel menu select To enable send Output Sequence Couple OUTP COUP ON Check the box labeled Enable To disable send To disable uncheck the box OUTP COUP OFF 113 Appendix D Output On Off Synchronization 114 2 Specify which Output Channels will be Synchronized Select the output channels that will be synchronized Front Panel SCPI Command In the front panel menu select To specif
108. ltage Priority sssissitiiisrieniiipninaiico aerias aien iaeei aeaii 120 W WA TIMING ee 3 watchdog mer 86 WED server 55 Web URLS ebe EE 4 WIPE SIZO S rrinin tiee eei 31 125 Manual Updates The following updates have been made to this manual since its publication date 04 15 11 Minor corrections have been made under Over voltage Protection Considerations on page 35 Additional information about programming the over current protection delay has been added to page 86 The programming accuracy specification for the Current low range lt 100mA 0 7V has been changed for models N6761A and N6762A on page 95
109. ltage or constant current mode On Agilent N673xB N674xB and N677xA power modules the power limit function will turn the output off after a power limit condition persists for about 1 millisecond A status bit CP will indicate that the output has been turned off because of a power limit condition To restore the output you must first adjust the load so that it draws less power Then you must clear the protection function as explained in chapter 4 under Clear Output Protection Functions Note that on these models it may be preferable for some applications to use the current or voltage setting to limit the output power so as to avoid turning the output off Power limiting should not be used when Agilent N673xB N674xB and N677xA power modules are grouped When these power modules are grouped you must reset the power limit to its maximum rated value 108 Series N6700 User s Guide Power Allocation Appendix C For Agilent N678xA power modules the power limit function does not apply Module Power Allocation The following commands program the module power limit function Front Panel SCPI Command Select Output Advanced Power To set a power limit on output 1 Enter a power limit for each output POW LIM 100 1 To query the power limits that are set send Front Panel SCPI Command Select Output Advanced Power POW LIM 1 4 The power allocation for all output channels is displayed in the dialog boxes To
110. luded as part of the optional Manual Set Option OL1 An electronic copy of the N6700 Service Guide is also included on the N6700 Product Reference CD ROM 47 3 Getting Started Connecting to the Interfaces 48 The Agilent N6700 MPS supports GPIB LAN and USB interfaces All three interfaces are live at power on Connect your interface cable to the appropriate interface connector Information on configuring the interfaces is found later in this chapter The front panel IO indicator comes on whenever there is activity on the remote interfaces The front panel Lan indicator comes on when the LAN port is connected and configured Power system mainframes provide Ethernet connection monitoring With Ethernet connection monitoring the instrument s LAN port is continually monitored and automatically reconfigured when the instrument is unplugged for a minimum of 20 seconds and then reconnected to a network GPIB Interface For detailed information about GPIB interface connections refer to the Agilent Technologies USB LAN GPIB Interfaces Connectivity Guide located on the Automation Ready CD that is shipped with your product The following steps will help you quickly get started connecting your instrument to the General Purpose Interface Bus GPIB The following figure illustrates a typical GPIB interface system GPIB Cable II To mm Ill Toon omg
111. ment inputs B Test Fixture 1 36V 2 24V 12 V Com 12 V 24 V 36 V NS SUP ce 42 Series N6700 User s Guide 3 Getting Started Tee E 44 Selecting an Output Channel ENEE 44 Entering an Output Voltage Setting E 44 Entering a Current Limit Setting E 45 Brablingitte DUUE iid ain cadnnitinndenunin ENEN 45 Using the Front Panel Men ENEE 46 Connecting to the Interface NENNEN 48 Communicating Over the LAN ENEE 55 Securing the Interfaces ENEE 57 This chapter describes how to get started using your power system It discusses turning the unit on using the front panel controls and navigating the front panel command menu A map of the front panel menu structure is found in Chapter 1 This chapter also contains information on how to configure the three remote interfaces that are provided on the back of the instrument Detailed information on configuring the remote interfaces is included in the Agilent Technologies USB LAN GPIB Interfaces Connectivity Guide which is available on the Automation Ready CD included with this product Series N6700 User s Guide 43 3 Getting Started Turning the Unit On After you have connected the line cord turn the unit on with the front panel power switch The front panel display will light up after a few seconds A power on self test occurs automatically when you turn the unit on This test assures you that the instrument is operational If the
112. n outline diagram are given in Appendix A A fan cools the power system by drawing air through the sides and exhausting it out the side and back The instrument must be installed in a location that allows sufficient space at the sides and back of the unit for adequate air circulation Rack Installation CAUTION You cannot use support rails for rack mounting your instrument Support rails would block the airflow needed for cooling Use Rack Mount kit Option 908 to rack mount your instrument The Rack Mount Kit is also available by ordering part number N6709A Agilent N6700 MPS mainframes can be mounted in a 19 inch EIA rack cabinet They are designed to fit in one rack unit 1U of space Do not block the air intake and exhaust at the sides of the unit or the exhaust at the rear of the unit Tools required Phillips driver T22 Torx driver T10 Torx driver Step 1 Step 2 Install eight clip nuts on the rack frame 2 in each corner where your instrument will be located Install the two front ears and the two rear extender supports on the instrument as shown in the figure Use six M3 x 8mm screws a for the front ears and four M3 x 6mm screws b for the extender supports If the standard extender supports are either too short or too long use the longer supports c Cut the supports if required d Series N6700 User s Guide Installation 2 Step 3 Install the two rear ears on the back of the instrument rack as shown
113. n status register to know when the transient trigger system has returned to the idle state Front Panel SCPI Command Not Available To query the TRAN_active bit bit 6 STAT OPER COND 1 If a bit value of 64 is returned in the query the TRAN_active bit is true and the transient action is NOT complete When the TRAN_active bit is false the transient action is complete Refer to the N6700 Programmer s Reference Help file for more information Generate Trigger Out Signals Series N6700 User s Guide Each output channel can generate trigger signals that can be used by other output channels or routed to a pin on the digital port that has been configured as a trigger output TOUT Use the following commands to program transient trigger signals that are generated when an output Step occurs Front Panel SCPI Command Use the Channel key to select the To program channel 3 s step function channel that is the trigger source to generate a trigger signal use Select Transient Step STEP TOUT ON 3 Check Enable Trigger Output Then press Select 69 4 Operating the Power System Programming Output Lists The Output List function described in this section is not available on all models Refer to Chapter 1 Model Differences The List Function Either output voltage or output current or both may be list controlled For Agilent N678xA models only the parameters associated with one of the priority mod
114. n that for purely resistive loads Use the following formula to estimate the additional up programming response time Response Time Added Output Capacitor X Change in Vout Current Limit Setting Load Current Note that programming into an external output capacitor may cause the power system to briefly enter constant current or constant power operating mode which adds additional time to the estimation Positive and Negative Voltages Either positive or negative voltages with respect to ground can be obtained from the output by grounding or commoning one of the output terminals Always use two wires to connect the load to the output regardless of where or how the system is grounded The instrument can be operated with any output terminal 240 VDC including output voltage from ground Agilent Models N678xA are optimized for grounding the negative output terminal Grounding the positive terminal may result in increased current measurement noise and a reduction in current measurement accuracy Protecting Sensitive Loads from AC Power Switching Transients This only applies if you are connecting loads that are highly sensitive to voltage or current transients to the output of the power system If your load is connected directly to the output of the power system and is not connected to chassis ground in any way you do not need to worry about AC power switching transients appearing at the output of the power system Operating th
115. nchronization Mainframe 1 Mainframe 2 Mainframe 3 123 45 67L 123 45 67L 1 2 3 45 67L ON Couple e OFF Couple A Common A Only two of the digital connector pins on each mainframe can be configured as ONCouple and OFFCouple on each synchronized mainframe The designated pins will function as both an input and an output with a negative transition on one pin providing the synchronization signal to the other pins Front Panel SCPI Command For mainframe 1 select To configure pin 6 of mainframe 1 System 10 DigPort Pin6 as the ON control DIG PIN6 FUNC ONC To configure pin 7 of mainframe 1 as the OFF control DIG PIN7 FUNC OFFC Repeat these commands for mainframes 2 and 3 Select Function then ONCouple Select Pins select pin 7 then select Function then OFFCouple Repeat these steps for mainframes 2 and 3 Operation Once configured and enabled turning the output on or off on any coupled channel will cause all coupled channels on all configured mainframes to turn on or off according to their user pr
116. nd Aux voltage measurement ranges Curr Iprog Calibrates High and Low current ranges Ilim Calibrates current limit Imeas Calibrates High and Low current measurement ranges Misc CMRR Calibrates common mode rejection ratio Dprog Calibrates the downprogrammer Ipeak Calibrates peak Resistance Calibrates output resistance High and Low ranges Date Saves the calibration date for each channel Save Saves the calibration data LAN Enables disables the LAN interface and the built in Web server USB Enables disables the USB interface Nvram Resets all non volatile RAM settings to their factory defaults Password Changes the password for the admin functions About Frame Displays model serial number and firmware revisions Module Displays model serial number options voltage current power Series N6700 User s Guide 15 1 Quick Reference SCPI Command Summary Subsystem Commands Some optional commands have been included for clarity All settings commands have a corresponding query Not all commands apply to all models SCPI Command ABORt ACQuire chanlist TRANsient chanlist CALibrate CURRent LEVel lt NRf gt channel LIMit POSitive lt NRf gt channel MEASure lt NRf gt channel PEAK channel DATA lt NRf gt DATE lt SPD gt channel DPRog channel LEVel P1 P2 P3 PASSword lt NRf gt RESistance 20 6 channel SAVE STATE lt Bool gt lt NRf gt VO
117. nd briefly turns the output off while the output and sense terminal polarities are switched Also note that if this option is installed in Model N6742B the maximum output current will be limited to 10A Front Panel SCPI Command Select Output Advanced Pol To switch the output and sense terminal Then check the Reverse box polarities of output 1 Uncheck the Reverse box to OUTP REL POL REV 1 return the polarity to normal To return the polarities back to normal OUTP REL POL NORM 1 When the output polarity has been reversed the voltage meter on the front panel display will show a bar over the voltage reading 10 001V Set the Agilent N6781A Output Resistance This information applies to Agilent Model N6781A only Output resistance programming is primarily used in battery testing applications and only applies in Voltage priority mode Values are programmed in Ohms from 40 mQ to 1 Q Front Panel SCPI Command Select To set the output resistance to 0 5 0 Output Advanced Resistance OUTP RES 0 5 1 Enter a value and press Select Set the Output Bandwidth This information applies to Agilent Models N678xA only 64 Agilent N678xA power modules have several voltage bandwidth modes to allow you to optimize output response time with capacitive loads The Low bandwidth setting provides stability with a wide range of output capacitors Additional bandwidth modes provide
118. ndix C Front Panel SCPI Command Select System Groups To configure a group of channels SYST GRO DEF 2 3 4 This groups channels 2 through 4 To In the matrix that appears select the channels you want to group Each row defines a separate group address the group use channel 2 To return grouped channels back to an ungrouped state first remove the parallel connections between channels and proceed as follows Front Panel SCPI Command Select System Groups To ungroup all channels SYST GRO DEL ALL In the matrix place each output channel in its own separate group Reboot the unit for the grouping or ungrouping changes to take effect Front Panel SCPI Command Cycle AC power SYST REB Series N6700 User s Guide 89 4 Operating the Power System Front Panel Keys Lockout You can lock the front panel keys to prevent unwanted control of the instrument from the front panel This is the most secure way of locking the front panel keys because you need a password to unlock the front panel The lockout setting is saved in non volatile memory so that the front panel remains locked even after AC power is cycled Front Panel SCPI Command Select System Preferences Lock Not Available In the dialog box enter the password to unlock the front panel Then select Lock The menu to unlock the front panel appears every time a key is pressed Enter the password to unlock the front panel If the password i
119. ng DCL to the control socket When the power system has finished performing the device clear it echoes the string DCL back to the control socket Service requests are enabled for control sockets using the Service Request Enable register Once service requests have been enabled the client program listens on the control connection When SRQ goes true the instrument will send the string SRQ nn to the client The nn is the status byte value which the client can use to determine the source of the service request Series N6700 User s Guide Securing the Interfaces Getting Started 3 Enable Disable the USB LAN and Web Server Enable USB Enable LAN Enable Web Server The USB interface LAN interface and the Web server are enabled when shipped To enable or disable the USB interface from the front panel press the Menu key and select System Admin USB Check this box to enable the USB Uncheck this box to disable the USB To enable or disable the LAN interface or Web server press the Menu key and select the following menu commands System Admin LAN Check this box to enable the LAN Uncheck this box to disable the LAN Check this box to enable the Web server Uncheck this box to disable the Web server The LAN must be enabled in order to enable the Web server If you cannot access the Admin menu it may be password protected Password Protecting the Interfaces Factory Settings and Calibration Y
120. nits with Option JO1 have tracking OVP in addition to the standard overvoltage protection It lets you set an overvoltage protection limit that is an offset from the programmed voltage The tracking OVP threshold automatically tracks the programmed output setting The output voltage is monitored at the sense and sense terminals Series N6700 User s Guide Operating the Power System 4 Front Panel SCPI Command Select Protect OVP To set an OVP of 10 V for output 1 VOLT PROT 10 1 2 For Models N678xA VOLT PROT REM 10 1 2 Enter a value in the OVP level box and press Select For J01 units enter a value in the Tracking OVP Offset box check the Enable box and then press Select To enable tracking OVP for output 1 VOLT PROT TRAC ON 1 To set the tracking offset for output 1 VOLT PROT TRAC OFFS 2 1 For Agilent Model N6784A you can also program a negative over voltage value Enter the value in the OVP field Also Agilent Models N678xA have a back up local OVP function Refer to Over voltage Protection in chapter 2 for a description of this feature Set the Over Current Protection Series N6700 User s Guide When over current protection is enabled the power system turns off the output if the output current reaches the current limit setting and transitions from CV to CC mode Front Panel SCPI Command Select Protect OCP To enable OCP for outputs 1 and 2 Check Enable OCP and press Selec
121. nt contains an internal fuse which is not customer accessible Series N6700 User s Guide Do Not Operate in an Explosive Atmosphere Do not operate the instrument in the presence of flammable gases or fumes Do Not Remove the Instrument Cover Only qualified service trained personnel who are aware of the hazards involved should remove instrument covers Always disconnect the power cable and any external circuits before removing the instrument cover Do Not Modify the Instrument Do not install substitute parts or perform any unauthorized modification to the product Return the product to an Agilent Sales and Service Office for service and repair to ensure that safety features are maintained In Case of Damage Instruments that appear damaged or defective should be made inoperative and secured against unintended operation until they can be repaired by qualified service personnel CAUTION A CAUTION notice denotes a hazard It calls attention to an operating procedure practice or the like that if not correctly performed or adhered to could result in damage to the product or loss of important 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 like that if not correctly performed or adhered to could result in personal injury or death Do not proceed beyond a WA
122. ode Set the voltage mode to List Press Select 1 Set the amplitude and width of the pulse For example to generate a pulse with an amplitude of 15 V and a pulse width of 1 second use SCPI Command To program output 1 use LIST VOLT 15 1 LIST DWEL 1 1 Front Panel Select Transient List Config Select List Step 0 and enter a voltage value of 15 Press Select Enter a dwell value of 1 for List Step 0 and Press Select Set the list pacing to Auto so that as each dwell time elapses the next step is immediately output SCPI Command LIST STEP AUTO Front Panel Select Transient List Pace 1 Select Dwell and press Select If you only wish to program a single pulse skip steps 4 and 5 and go to step 6 If you want to generate a pulse train you must specify the off time between pulses To do this you must program another step For a voltage list you must specify an amplitude and an off time For example to program an off time of 2 seconds with an amplitude of 0 V between pulses use SCPI Command To program output 1 use LIST VOLT 15 0 LIST DWEL 1 2 Front Panel Select Transient List Config Select List Step 1 and enter a voltage value of 0 Press Select 1 1 Enter a dwell value of 2 for List Step 1 and Press Select 71 4 Operating the Power System Step 5 Step 6 Step 7 Step 8 Step 9 To generate a pulse train you can simply
123. ogrammed delays This applies to the front panel On Off key the Web server and to SCPI commands If a mainframe has its ON OFF key coupled located in the System Preferences Keys menu turning the output on or off on any coupled channel will cause all coupled channels as well as non coupled channels on that mainframe to turn on or off 116 Series N6700 User s Guide Si e Bega eg e Appendix E ee Source Operating Modes e Single Quadrant Eperetten edd dude deed dee difee deg 118 g Agilent N678xA Multi Quadrant Operation csccsossesssnsssessssensntsee 120 This chapter discusses the difference between constant voltage and constant current operating modes multiple output quadrant operation and other advanced source functions Series N6700 User s Guide 117 Appendix E Source Operating Modes Single Quadrant Operation The Agilent N6700 Modular Power System can operate in either constant voltage CV or constant current CC over the rated output voltage and current Constant voltage mode is defined as an operating mode in which the dc source maintains its output voltage at the programmed voltage setting in spite of changes in load line or temperature Thus when the load resistance changes the output voltage remains constant while the output current changes to accommodate the change in load Constant current mode is defined as an operating mode in which the dc source maintains its output current at the progr
124. onnections CAUTION Only connect outputs that have identical voltage and current ratings in parallel Agilent Models N678xA cannot be connected in parallel Connecting outputs in parallel provides a greater current capability than can be obtained from a single output The following figures show how to connect two outputs in parallel The figure on the left illustrates local sensing If voltage drop in the load leads is a concern the figure on the right shows how to connect the sense leads directly at the load Note that in both cases the remote sense terminals must be connected together OUTPUT 2 OUTPUT 1 SENSE OUTPUT 2 OUTPUT 1 WITH REMOTE SENSING The following figure shows the connections for 50A power modules SENSE JUMPERS JUMPERS INSTALLED INSTALLED WITH LOCAL SENSING OUTPUT 3 OUTPUT 1 S LS LS S S LS LS S JUMPERS INSTALLED TWIST LEADS WITH LOCAL SENSING 36 OUTPUT 3 OUTPUT 1 S LS LS S S LS LS S
125. or the mainframe in seconds offset field in milliseconds then press OUTP COUP DOFF 051 Select Note that you can program a common delay that is longer than the maximum delay offset of the mainframe You may choose a longer value to make your program flexible for future configurations that may have power modules with longer delay offsets However if you program a value that is shorter than the maximum delay offset you may experience improper synchronization across all outputs There is no need to specify a delay offset when outputs turn off Outputs start executing their turn off delays as soon as an output Off command is received Series N6700 User s Guide Output On Off Synchronization Appendix D Synchronizing Multiple Mainframes Procedure The output turn on synchronization function can be used across multiple mainframes that have coupled output channels Each mainframe that will be synchronized must have at least one coupled channel Note that cross frame synchronization must be enabled for any mainframe that contains synchronized output channels 1 Configure the output channels on each mainframe as described in steps 1 through 3 of the previous procedure 2 This step is required if you have power modules with different minimum delay offsets Specify a common delay offset for all of the synchronized output channels This value must be the largest delay offset of all synchronized output channels regardless of the mainfr
126. otal desired operating voltage The operating mode of each output is determined by the output s programmed settings operating point and load condition Because these conditions may change during series operation the front panel status indicator will reflect these changes This is normal Momentary status changes are also normal Effect on Specifications Specifications for outputs operating in series can be obtained from the specifications for single outputs Most specifications are expressed as a constant or a percentage or ppm plus a constant For series operation the percentage portion remains unchanged while constant portions or any constants are changed as indicated Voltage All series specifications referring to voltage are twice the single output specification except for programming resolution which is the same as for a single output Current All series specifications referring to current are the same as for a single output except for CC load effect CC load cross regulation CC source effect and CC short term drift These are twice the current programming accuracy including the percentage portion at all operating points Load Transient Load transient specifications are typically twice the single output Recovery Time Series N6700 User s Guide 39 2 Additional Load Considerations 40 Response Time with an External Capacitor When programming with an external capacitor voltage response time may be longer tha
127. ou can password protect access to the LAN and USB interfaces as well as the non volatile RAM reset and the calibration functions This capability is available in the System Admin menu As shipped from the factory the Admin menu password is 0 zero This means that you do not have to enter a password to access the Admin menu Simply select System Admin Login and press Enter To password protect the Admin menu select System Admin Password The password must be numeric and up to 15 digits long When done log out of the Admin menu to activate the password You can now only enter the Admin menu by providing the right password If the password is lost access can be restored by setting an internal switch to reset the password to 0 If the message Locked out by internal switch setting or Calibration is inhibited by switch setting appears the internal switch is set to prevent the password from being changed Refer to the Service Guide Restoring the Non volatile Factory Settings Series N6700 User s Guide Remote interface settings are stored in non volatile memory The factory shipped interface settings documented in the following table are optimized for connecting your power system to a site network They should also work well for other network configurations These factory shipped LAN settings can be restored by selecting the Reset control in the System IO LAN Config Reset menu All non volatile settings including LAN can b
128. protection monitors the temperature of each output and shuts down the output if any temperature exceeds the maximum factory defined limits Oscillation protection shuts down the output if an oscillation is detected on the output Only applies to Agilent N678xA PF indicates that a power fail condition on the AC mains has disabled the output CP indicates that a positive power limit condition has disabled the output This protection function does not apply to all power modules Refer to Appendix C for further information CP indicates that a negative power limit condition has disabled the output This protection function does not apply to all power modules Refer to Appendix C for further information Prot indicates that the output is disabled either because of a coupled protection signal from another output or because the programmed output watchdog time has expired The Inhibit input pin 3 on the rear panel digital connector can be programmed to act as an external shutdown signal Refer to Appendix B for further information Set the Over Voltage Protection The over voltage protection function turns off the affected output if the output voltage reaches the programmed over voltage limit The output voltage is monitored at the output and output terminals On Agilent N678xA models the output voltage is monitored at the sense and sense terminals This allows for more precise over voltage monitoring directly at the load U
129. r information about configuring the LAN settings from the front panel of the instrument 3 Use the Connection Expert utility of the Agilent IO Libraries Suite to add the N6700 power system and verify a connection To add the instrument you can request the Connection Expert to discover the instrument If the instrument cannot be found add the instrument using the instrument s hostname or IP address If this does not work refer to the chapter on Troubleshooting Guidelines in the Agilent Technologies USB LAN GPIB Interfaces Connectivity Guide 4 You can now use Interactive IO within the Connection Expert to communicate with your instrument or you can program your instrument using the various programming environments You can also use the Web browser on your computer to communicate with the instrument as described under Using the Web Server later in this chapter Connecting to a Private LAN A private LAN is a network in which LAN enabled instruments and computers are directly connected and not connected to a site LAN They are typically small with no centrally managed resources Series N6700 User s Guide Getting Started 3 To Network To LAN Port Interface Card NIC Se CAT5 Crossover Cable Instrument 1 Ifyou have not already done so install the Agilent IO Libraries Suite from the Automation Ready CD that is shipped with your product 2 Connect
130. r off Additional measures to protect sensitive loads from common mode currents are discussed under Protecting Sensitive Loads from AC Power Switching Transients later in this chapter Installation Locate the core anywhere along the length of the cord Pass the power cord through the core twice Close the core pa Series N6700 User s Guide 29 2 Installation Connecting the Outputs SHOCK HAZARD Turn off AC power before making rear panel connections All wires and straps must be properly connected with the terminal block screws securely tightened CAUTION Disconnect the connector plug to make your wire connections The 8A connector plug accepts wires sizes from AWG 14 to AWG 30 The 12A connector plug accepts wires sizes from AWG 12 to AWG 30 The 20A connector plug accepts wires sizes from AWG 10 to AWG 24 The 50A connector plug accepts wires sizes from AWG 6 to AWG 20 Wire sizes smaller than AWG 20 are not recommended Connect the load wires to the and terminals Connect the sense wires to the s and s terminals Sense jumpers are provided for local sensing Securely fasten all wires by tightening the screw terminals Insert the connector plug into the back of the unit Secure the 12 A and 50 A connector by tightening the locking screws A chassis ground binding post is located next to the AC input connector for ground connections Part number information for all connector plugs is pro
131. rface The following steps will help you quickly get started connecting your USB enabled instrument to the Universal Serial Bus USB The following figure illustrates a typical USB interface system USB Cable Wee PC Connect to Instrument Connect to USB USB port on port on PC instrument 1 Ifyou have not already done so install the Agilent IO Libraries Suite from the Automation Ready CD that is shipped with your product 2 Connect your instrument to the USB port on your computer 3 With the Connection Expert utility of the Agilent IO Libraries Suite running the computer will automatically recognize the instrument This may take several seconds When the instrument is recognized your computer will display the VISA alias IDN string and VISA address This information is located in the USB folder 4 Note that you can also view the instrument s VISA address from the front panel Press the Menu key then use the navigation keys to select System IO USB Identification 5 You can now use Interactive IO within the Connection Expert to communicate with your instrument or you can program your instrument using the various programming environments For detailed information about LAN interface connections refer to the Agilent Technologies USB LAN GPIB Interfaces Connectivity Guide located on the Automation Ready CD that is shipped with your product Series N6700 User s
132. rns off and the LED next to the Line switch changes from green to amber To restore the front panel display simply press one of the front panel keys The first action of the key turns the display on Subsequently the key will revert to its normal function If the Wake on I O function is selected the display is restored whenever there is activity on the remote interface This also resets the timer on the screen saver As shipped Wake on I O is active Front Panel SCPI Command Select System Preferences Display Saver Not Available Enable or disable the screen saver by checking or unchecking the Screen Saver checkbox Then Press Select Enter a value in minutes in the Saver Delay field to specify the time when the screen saver will activate Check Wake on 1 0 to activate the display with 1 0 bus activity Contrast You can set the contrast of the front panel display to compensate for ambient lighting conditions The contrast can be set from 0 to 100 in increments of 1 As shipped the contrast is set to 50 Front Panel SCPI Command Select System Preferences Display Contrast Not Available Enter a contrast value in the Contrast box Then Press Select View You can specify how the output channels are displayed at turn on Front Panel SCPI Command Select System Preferences Display View To display all channels DISP VIEW METER4 Check 1 channel to display channel one Check 4 channel to
133. rrent AC DC Returns the high level of a current pulse Returns the low level of a current pulse Returns the maximum current Returns the minimum current Series N6700 User s Guide SCPI Command FETCh SCALar continued VOLTage DC chanlist ACDC chanlist HIGH chanlist LOW chaniist MAXimum chanlist MINimum chanlist ARRay CURRent DC chanlist VOLTage DC chanlist FORMat DATA ASCII REAL BORDer NORMal SWAPped INITiate IMMediate ACQuire chaniist TRANsient chanlist CONTinuous TRANsient lt Bool gt chanlist MEASure SCALar CURRent DC chanlist ACDC chanlist HIGH chanlist LOW chaniist MAXimum chanlist MINimum chanlist VOLTage DC chanlist ACDC chanlist HIGH chanlist LOW chaniist MAXimum chanlist MINimum chanlist ARRay CURRent DC chanlist VOLTage DC chanlist OUTPut STATe lt Bool gt NORelay chanlist COUPle STATe lt Bool gt CHANNel lt NR1 gt lt NR1 gt DOFFset lt NRf gt MODE AUTO MANual MAN DOFFset Series N6700 User s Guide Quick Reference 1 Description Returns the DC voltage Returns the total rms voltage AC DC Returns the high level of a voltage pulse Returns the low level of a voltage pulse Returns the maximum voltage Returns the minimum voltage Returns the instantaneous output current
134. rrents Note that the minimum wire size required to prevent overheating may not be large enough to prevent over voltage tripping or maintain good regulation Under most conditions the load wires should also be heavy enough to limit the voltage drop to no more than 1 0 V per lead To help prevent nuisance tripping of the over voltage circuit select a wire size sufficient to handle the FULL output current of the unit no matter what the intended load current or current limit setting Load lead resistance is also an important factor relating to the CV stability of the instrument when remote sensing capacitive loads If high capacitance loads are expected you should not use wire gauges heavier than 12 to 14 AWG for long runs of load lead Wire size Current carrying capacity in Amps Resistance Max Length to Limit Voltage to 1 V Lead for stranded copper wire for5A for10A for20A Tor b A AWG 2 wires bundled 4 wires bundled Q foot Wire length in feet 20 78 6 9 0 0102 20 x xX x 18 14 5 12 8 0 0064 30 15 Xx xX 16 18 2 16 1 0 0040 50 25 xX xX 14 29 3 25 9 0 0025 80 40 20 x 12 37 6 33 2 0 0016 125 63 30 xX 10 51 7 45 7 0 0010 200 100 50 20 8 70 5 62 3 0 0006 320 160 80 32 6 94 83 0 0004 504 252 126 50 Area in mm2 2 wires bundled 4 wires bundled Q meter Wire length in meters 0 5 78 6 9 0 0401 5 D D D 0 75 9 4 8 3 0 0267 74 x x x 1 12 7 11 2 0 0200 10 5 xX xX 1 5 15 0 13 3 0 0137 14 6 7 2 x x 2 5 23 5 20 8 0 0082 24 4 12 2 6 1 x
135. rs at the beginning or end of the step These trigger signals can be used to synchronize other events with the list When either a voltage or current list is programmed the associated dwell BOST and EOST lists must all be set to the same number of steps otherwise an error will occur when the list is run For convenience a list may be programmed with only one step or value In this case a single step list is treated as if it had the same number of steps as the other lists with all values being equal to the one value List data is not stored in non volatile memory This means that list data that is sent to the instrument either from the front panel or over the bus will be lost when the power system is turned off However list data can be saved as part of a saved instrument state Refer to Instrument State Storage later in this chapter 70 Series N6700 User s Guide Operating the Power System 4 Program an Output Pulse or Pulse Train Series N6700 User s Guide Step 1 Step 2 Step 3 Step 4 The following procedure shows how to generate an output pulse train using the List function 2 1 off Pulse width zue List Count 1 additional pulses gt 1 Trigger Il Set the voltage or current function for which you want to generate a pulse to List mode This example programs a voltage pulse SCPI Command To program output 1 use VOLT MODE LIST Front Panel Select Transient M
136. rts 0 1 2 A Relay Circuits B Digital Interface Circuits Series N6700 User s Guide For a complete description of the electrical characteristics of the digital I O port see Appendix A 103 Appendix B Using the Digital Port Digital Input Each of the seven pins can be configured as digital input only The polarity of the pins can also be configured Pin 8 is the signal common for the digital input pins The pin status reflects the true condition of the external signal that is applied to the pin The pin state is not affected by the value of the digital output word To configure the pins for digital input only Front Panel Select System 1I0 DigPort Pins Select a pin in the Pin field In the Function field select Dig In In the Polarity field select either Positive or Negative To read the data from the pins select System 10 DigPort Data The input data is displayed as a binary number in the Data In field External Trigger 104 SCPI Command To configure the pin function DIG PIN lt 1 7 gt FUNC DINP To configure pin polarity DIG PIN lt 1 7 gt POL lt pol gt To read the pin data DIG INP DATA Each of the seven pins can be configured as either trigger inputs or trigger outputs The polarity of the pins can also be configured When you program trigger polarity POSitive means a rising edge and NEGative means a falling edge Pin 8 is the signal common for the trigger pins When configured a
137. rument identification OPC Enable operation complete bit in ESR OPT Return option number BCL lt NRf gt Recalls a saved instrument state RDT Return output channel descriptions Command Description RST Reset SAV lt NRf gt Saves an instrument state SRE lt NRf gt Set service request enable register STB Return status byte TRG Trigger TST Performs self test then returns result WAI Pauses additional command processing until all device commands are done Series N6700 User s Guide 21 1 22 Quick Reference RST Settings These settings are set by the RST Reset command CAL STAT CURR CURR LIM CURR LIM COUP CURR LIM NEG CURR MODE CURR PROT DEL CURR PROT DEL STAR CURR PROT STAT CURR RANG CURR SLEW CURR SLEW MAX CURR TRIG DIG OUTP DATA DISP VIEW INIT CONT TRAN LIST COUN LIST CURR LIST DWEL LIST STEP LIST TERM LAST LIST TOUT BOST LIST TOUT EOST LIST VOLT OUTP OUTP COUP OUTP DEL FALL OUTP DEL RISE OUTP PMOD OUTP TMOD OUTP PROT COUP OUTP PROT DEL OUTP PROT 0SC OUTP PROT WDOG OUTP REL POL POW LIM OFF 0 08 or MIN MAX ON MIN FIX 0 02 SCH OFF MAX 9 9E 37 ON MIN 0 METER1 OFF 1 MIN 0 001 AUTO OFF OFF OFF MIN OFF OFF VOLT LOWZ OFF 0 02 ON OFF NORM MAX RES RES STAT SENS CURR CCOM SENS CURR RANG SENS CURR RANG AUTO SENS FUNC SENS FUNC CURR SENS FUNC VOLT SENS FUNC VOLT INP SENS SWE POIN SENS SWE OFFS POIN SENS SWE TINT
138. s Supplied and verify that you have received these items with your instrument If anything is missing please contact your nearest Agilent Sales and Support Office 23 2 Installation General Information Models Agilent Model Description N6700B N6701A N6702A N6781A N6782A N6784A N6761A N6762A N6751A N6752A N6753A N6754A N6731B N6741B N6732B N6742B N6733B N6743B N6773A N6734B N6744B N6774A N6735B N6745B N6775A N6736B N6746B N6776A 400 W 600 W 1200W MPS Mainframe without DC Power Modules 20 W Source Measure DC Power Module 50 W 100 W Precision DC Power Module 50 W 100 W High Performance Autoranging DC Power Module 300 W 20V 60V High Performance Autoranging DC Power Module 50 W 100 W 5 VDC Power Module 50 W 100 W 8 V DC Power Module 50 W 100 W 300 W 20 V DC Power Module 50 W 100 W 300 W 35 V DC Power Module 50 W 100 W 300 W 60 V DC Power Module 50 W 100 W 300 W 100 V DC Power Module Items Supplied Item Description Part Number Power Cord Ferrite Core Digital Connector plug Product Reference CD ROM Automation Ready CD ROM T 10 Torx tool 8A Output Connector plug 12 A Output Connector plug 20 A Output Connector plug 50 A Output Connector plug AUX Measurement connector plug Small Sense Jumpers Large Sense Jumpers Sense Connector Module Cal Certificate A power cord suitable for your location Shipped w ma
139. s a trigger input you can apply either a negative going or a positive going pulse to the designated trigger input pin The trigger latency is 5 microseconds The minimum pulse width is 4 microseconds for positive going signals and 10 microseconds for negative going signals The pin s polarity setting determines which edge generates a trigger in event When configured as a trigger output the designated trigger pin will generate a 10 microsecond wide trigger pulse in response to a trigger event Depending on the polarity setting it can be either positive going or negative going when referenced to common Front Panel Select System 10 DigPort Pins Select a pin in the Pin field In the Function field select either Trig In or Trig Out In the Polarity field select either Positive or Negative SCPI Command To select the trigger output function for pin 1 DIG PIN1 FUNC TOUT To select the trigger input function for pin 2 DIG PIN2 FUNC TINP To select the trigger polarity DIG PIN lt 1 7 gt POL lt pol gt Series N6700 User s Guide Fault Output Inhibit Series N6700 User s Guide Input LATChing LIVE OFF Using the Digital Port Appendix B Pins 1 and 2 can be configured as a fault output pair The polarity of pin 1 can also be configured Pin 1 is the Fault output pin 2 is the common for pin 1 Note that pin 2 must also be connected to pin 8 The Fault Output function enables a fault condition on any c
140. s lost the SYSTem PASSword FPANel RESet command can reset the front panel lockout password Refer to the Programmer s Reference Help file on your Agilent N6700 Product Reference CD for more information The SYSTem COMMunicate RLSTate RWLock command can also lock and unlock the front panel This command is completely independent of the front panel lockout function If you use this command to lock the front panel the front panel will be unlocked when AC power is cycled Keys You can enable or disable the front panel key clicks Front Panel SCPI Command Select System Preferences Keys Not Available Check Enable key clicks to enable key clicks Uncheck to disable key clicks You can configure the On Off key to enable or disable ALL outputs Front Panel SCPI Command Select System Preferences Keys Not Available Check On Off key affects all channels The ON Off key will now be active on ALL channels Series N6700 User s Guide Operating the Power System 4 Front Panel Display Series N6700 User s Guide Screen Saver The power system has a front panel screen saver that significantly increases the life of the LCD display by turning it off during periods of inactivity The delay can be set from 30 to 999 minutes in 1 minute increments As shipped from the factory the screen saver comes on one hour after activity on the front panel or interface has ceased When the screen saver is active the front panel display tu
141. s positive or negative programmed setting The output voltage will remain at its programmed setting as long as the load current remains within the positive or negative current limit In current priority mode the output is controlled by a bi polar constant current feedback loop which maintains the output sourcing or sinking current at its programmed setting The output current will remain at its programmed setting as long as the load voltage remains within the positive or negative voltage limit 61 4 Operating the Power System Front Panel SCPI Command Select Output Mode To set output 1 to current priority Select either Voltage priority or FUNC CURR 1 Current priority and press Select When switching between Voltage priority and Current priority the output is turned off and the output settings revert to their Power on or RST values Refer to Appendix E for information about voltage and current priority mode operation Set the Slew Rate Front Panel SCPI Command Select Output Advanced Slew To set the voltage slew rate to 5 V s Then select Voltage or Current VOLT SLEW 5 1 Enter the voltage or current slew To set the current slew rate to 1 A s rate in the Slew Rate field CURR SLEW 1 1 Check Max slew rate to program To set the fastest slew rate the fastest slew rate VOLT SLEW MAX 1 The voltage slew rate determines the rate at which the voltage changes to anew programmed setting When set to M
142. scssessesssesessessessessesscsuestsseeseeseeneeneans 103 COMMOCTIONS eeh 103 digital input CONMFIQUIING cin 104 CopnnecHgons e iinan 104 digitizer programming s sessesesseseesesesseecseesestesseeeseeseess 77 IMO EI E 100 dovwpnptrogramming 119 E environmental condittons 26 er 12 47 external trigger COMFIQUIING MOOO 104 CopnnecHgons 104 F fault output COMPQUMING ENEE 105 CONMECTIONS ee 105 ferrite Core scsi nea A 29 fetch COMMAMNAS c scssessesssessssessessessesssseseestesteseeseeneenees 75 frequency 400 HS 28 front panel CONTAS E 91 display ee 12 ewe e 13 DOCK OU teadeseesis secs oti dete ids A eR ete 90 UI 14 Shee SAVE nsaria 91 EM 91 front panel menu Gltng 47 E TU 46 G GPIB Inte rbace s cs ccccccsccseetiecetcesceccheossseacssscacisntuectncsdndens 48 Ch 48 123 Index ground Geer 26 OCU Dan ear 28 groups GMAMME M ATEST 89 VIC W eege geet 12 guard conpnectons 32 H Happ geseet 79 La eo a a a a 46 47 NISTON irinin 2 l IN eege EE 13 inhibit input COMPIQUNITIG eet 105 ele e E 105 INSPECTION E 25 installation ooo eesesessessesessesessesessseseseesssceseseeseseeseseeseaeeees 26 instrument Identftecation cccesecsesecseseesessesescseeseseeseseesesecseneseseeees 88 STOFING States 88 10 12 48 PACT ESS aici heise eene EE 52 ITEMS supplied s v isiiaiiiriiniiionanisionnainionnanininianeiniaant 24 L LAN interface oe cece eeseseeseetesesteseeesees 12 49 50 51 PAAMOLElS ee deet
143. self test fails the front panel Err indicator comes on Press the Error key to display the list of errors on the front panel Refer to the Service Guide for further information When the front panel display appears you can use the front panel controls to enter voltage and current values Selecting an Output Channel Channel Press the Channel key to select the output channel that you wish to program Entering an Output Voltage Setting Method 1 Use the Navigation and Arrow Keys Navigation Keys Use the left and right navigation keys to navigate to the setting that you wish to change In the display below channel 1 s voltage setting is selected Enter Gi a value using the numeric keypad Then press Enter ei 0 0000V 0 0000A Set o ooooa Arrow Keys You can also use the arrow keys to adjust the value up or down and switch ry between and limits on Model N6784A When the output is on and the unit is operating in CV mode the output voltage changes immediately Otherwise the value will become effective when the output is turned on Method 2 Use the Voltage key to enter a value Voltage Use the Voltage key to select the voltage entry field In the display below channel 1 s voltage setting is selected Enter the desired setting using the numeric keypad Then press Enter If you make a mistake either use the backspace key to delete the number press Back to back ou
144. sensing is independent of other power system functions remote sensing can be used regardless of how the power system is programmed Connect the unit for remote sensing by first disconnecting the straps between sense and load terminals Make your connections as shown in the following figure Connect the load to the output terminals using separate connecting wires Keep the wire pair as short as possible and twist or bundle it to reduce lead inductance and noise pickup Keep load leads under 14 7 meters 50 feet per lead because of inductance effects 50 A 12A amp 20 A CONNECTOR CONNECTOR dei 50A SENSE S ALS LS S TWIST _ d4 b Connect the sense leads as close to the load as possible Do NOT bundle the sense wire pair together with the load leads keep the load wires and sense wires separate Note that the sense leads carry only a few milliamperes of current and can be a lighter gauge than the load leads However note that any voltage drop in the sense leads can degrade the voltage regulation of the instrument Try to keep the sense lead resistance less than about 0 5Q per lead this requires 20 AWG or heavier for a 50 foot length 8A CONNECTOR G 8 G S
145. sessesesrteesrreesrreesrreesrreennreesnrnennreennrne 83 System Related Operations ccccccssessssssessesesssssssssesssssssessssesssscssesssesseaeees 88 This chapter contains examples on how to operate your power system from the front panel and over the remote interface using SCPI commands For complete details on the SCPI Standard Commands for Programmable Instruments commands refer to the Programmer s Reference Help file included on the Agilent N6700 Product Reference CD This CD ROM is shipped along with your instrument The simple examples discussed in this chapter show you how to program Output voltage and current functions Output triggers Measurement functions Measurement triggers Protection functions System functions Refer to Appendix B for information about using the Digital Port on the back of your instrument Refer to Appendix C for information about using the power allocation function 59 4 Operating the Power System Programming the Output Select a Channel View Front Panel Press the Meter key to toggle between single channel and multiple channel view Select an Output Channel Front Panel Press the Channel key to select an output channel Set the Output Voltage 60 Front Panel Press the Voltage key Enter a value and press Select SCPI Command To select single channel view DISP VIEW METER1 To set multiple channel view DISP VIEW METER4
146. sseesssesescsssseensseanseseeesstseeanseeeseeaes 111 Synchronizing Output Turn on Delavs 112 Synchronizing Multiple Mainframes c ccscssescssescsescsssscssescsssscesesceees 115 IN Cl EE 116 Appendix E Source Operating Modes sscscscssssscsssssssssssssecesesseesessesaeseseesansesensaneesnsanens 117 Single Quadrant Operation ccccsesessesesseseeeseesesseeseeseesestseessnssteaeeneeess 118 Agilent N678xA Multi Quadrant Operation cccsessesseseeeeseeeeeeees 120 This manual describes firmware revision D 00 00 and up Go to http www agilent com find N6700firmware if you need to download this or any later versions of the firmware Information on how to install the firmware is available on the web site Refer to Instrument Identification in chapter 4 to view the firmware version that is currently installed in your mainframe Updated versions of this manual are also posted on the web Go to http www agilent com find N6700 to get the latest version of the manual Series N6700 User s Guide 1 Quick Reference The Agilent N6700 Modular Power System At a DGlance 8 The Front Panel At a flenre ee EEN EES EE 11 The Bear Panel At a Glaf Ee EENS 11 Front Panel Display At a Glance EE 12 Front Panel Keys At a Glance EE 13 Front Panel Menu Reference c ccccsssssssssssessssssssssssesssssssssssssssessseesees 14 SCPI Command SUMMAN te ciccnda dhncacandiddana
147. system will continue to operate normally If the self test fails the front panel Err indicator comes on Press the Error key to display the list of errors on the front panel Refer to the Service Guide for further information Front Panel SCPI Command Cycle AC power TST Instrument Identification For Agilent N6700 mainframes you can return the model number serial number firmware revision backup and active firmware For power modules you can return the model number serial number installed options voltage current and power rating Front Panel SCPI Command Select System About Frame IDN or SYST CHAN MOD 1 SYST CHAN OPT 1 Select System About Module SYST CHAN SER 1 Instrument State Storage The power system has two storage locations in non volatile memory to store instrument states The locations are numbered 0 and 1 Any state previously stored in the same location will be overwritten Front Panel SCPI Command Select States SaveRecall To save a state In the SaveRecall field enter a ee ogee location from 0 to 1 and press Select Select Save to save the state or Recall to recall a state To recall a state RCL lt n gt When shipped from the factory the power system is configured to automatically recall the reset RST settings at power on However you can configure the power system to use the settings stored in memory location 0 at power on Front Panel SCPI Command Select S
148. t CURR PROT STAT 1 1 2 You can also specify an OCP delay to prevent momentary CV to CC status changes from tripping the over current protection The power system may momentarily transition into CC mode when it is turned on when an output value is programmed or when the output load is connected In most cases these temporary conditions would not be considered an over current protection fault and having an OCP condition disable the output when the CC status bit is set would be a nuisance Specifying an OCP delay lets the OCP circuit ignore the CC status bit during the specified delay period Once the OCP delay time has expired and if the CC mode persists the output will shut down The delay can be programmed from 0 to 0 255 seconds You can specify if the OCP delay timer is started by any transition of the output into CC mode or only at the end of a settings change in voltage current or output state Front Panel SCPI Command Select Protect OCP To specify a 10 millisecond delay Enter a delay value and press Select OUTP PROT DEL 0 01 1 Check Start delay on CC to start the To start the delay timer by ANY output delay timer by ANY output transition transition into CC mode into CC mode Otherwise the delay CURR PROT DEL STAR CCTR 1 timer will only be started by a settings To start the delay timer by a settings change in voltage current or output change in voltage current or output state CURR PROT DEL STAR
149. t Response Time in Voltage Priority mode Time to recover to within settling band for a load change from 0 1 A to 0 9 A in the 20 V range from 0 1 A to 1 5 A in the 6 V range Settling band for 20 V 1 A output range 10 mV 10 mV 10 mV Settling band for 6 V 3 A output range 20 mV 20 mV 20 mV Recovery time lt 35 us lt 35 us lt 35 us t600 mV range is only available in Voltage Priority mode 300 mA 100 mA 10 mA ranges are only available in Current Priority mode 2 Values in parentheses apply when power modules are installed in Agilent N6705A mainframes Series N6700 User s Guide 97 Appendix A Specifications Agilent N6700B N6701A N6702A MPS Mainframes Supplemental Characteristics N6700B N6701A N6702A Command Processing Time lt 1 ms from receipt of command to start of output change Protection Response Characteristics INH input Fault on coupled outputs 5 us from receipt of inhibit to start of shutdown lt 10 us from receipt of fault to start of shutdown Digital Control Characteristics Maximum voltage ratings Pins 1 and 2 as FLT output Pins 1 7 as digital trigger outputs pin 8 common Pins 1 7 as digital trigger inputs and pin 3 as INH input pin 8 common 16 5 VDC 5 VDC between pins pin 8 is internally connected to chassis ground Maximum low level output voltage 0 5 V 4 mA Maximum low level sink current 4 mA Typical high level leakage current
150. t are available at the present menu level In this case the top level menu commands are shown with the Output command highlighted The third line indicates which commands are available under the Output command Selecting the highlighted command accesses this lower level Chan 1 4 Measure Transient Protect States System Voltage Current Misie Sequence Advanced Press the right arrow gt navigation key to traverse the menu until the Protect command is highlighted Press the Sel key to select the Protect command Output Measure Transient IWGuMl States System OWP OCP Inhibit Coupling WOog sc Clear The menu path now shows that the commands shown on the second line are located under the Protect command The OVP command is highlighted The third line indicates which functions are located under the OVP command Press the Sel key to select the OVP command Chan 1 Protect is OCP Inhibit Coupling WOog fis Clear Overvoltage protection settings Series N6700 User s Guide 4 4 Enter Channel Getting Started 3 The command menu is now at the function control level This is the lowest level in this path Use the navigation keys to highlight the OVP Level control as shown below Enter the desired over voltage level using the numeric keypad Then press Enter Chan 1 Protect OwP Press the Channel key at any time to select a different output channel This can save time
151. t of the menu or press Meter to return to meter mode 44 Series N6700 User s Guide Getting Started 3 Entering a Current Limit Setting Method 1 Use the Navigation and Arrow Keys Navigation Keys Use the left and right navigation keys to navigate to the setting that you wish O to change In the display below channel 1 s current setting is selected Enter e a value using the numeric keypad Then press Enter 0 0000V 0 0000A m o ee s Tal Arrow Keys You can also use the arrow keys to adjust the value up or down and switch ay between and limits on Models N678xA When the output is on and the unit is operating in CC mode the output current changes immediately Otherwise the value will become effective when the output is turned on Method 2 Use the Current key to enter a value Current Use the Current key to select the current entry field In the display below channel 1 s current setting is selected Enter the desired setting using the numeric keypad Then press Enter Chan 1 OQutput Current If you make a mistake either use the backspace key to delete the number press Back to back out of the menu or press Meter to return to meter mode Enabling the Output Use the On Off key to enable the output On Off If a load is connected to the output the front panel display will indicate that it is drawing current Otherwise the current reading will be zero The status indicator next
152. t turn off sequence delay Sets the output turn on sequence delay Sets the mode for turn on off transitions only on N676xA Specifies the turn on turn off impedance only on N678xA Sets the remote inhibit input Programs the power on state Resets latched protection Enables disables channel coupling for protection faults Sets over current protection programming delay Enables disables output oscillation protection only on N678xA Enables disables the 1 0 watchdog timer Sets the watchdog timer delay Sets the output relay polarity Option 760 Enables disables the capacitive current compensation Selects the current measurement range Enables disables measurement autoranging N6781A N6782A Selects the measurement function for backward compatibility Enables disables current measurements replaces FUNCtion Enables disables voltage measurements replaces FUNCtion Selects the voltage measurement input only on N6781A Sweep commands only on N676xA N678xA and Option 054 Defines the trigger offset in the measurement sweep Defines the number of data points in the measurement Sets the measurement sample interval Selects the voltage measurement range Enables disables measurement autoranging N6781A N6782A Selects the measurement window N676xA N678xA Option 054 Sets the output current Sets the triggered output current Sets the positive current limit only on N678xA Sets the current limit tracking state only on N678xA
153. tates PowerOn OUTP PON STAT RCLO Select Recall State 0 then press Select Series N6700 User s Guide Operating the Power System 4 Output Groups Output grouping does not apply to Agilent N678xA power modules Output channels can be configured or grouped to create a single output with higher current and power capability Almost all instrument functionality is supported by grouped channels including voltage and current programming measurements status step and list transients The following conditions apply for grouped channels Up to four output channels can be grouped per mainframe Output channels that are grouped must also be connected in parallel as described in Chapter 2 Grouped channels do not have to be adjacent but they must have identical model numbers and options installed The maximum output current is the sum of the maximum of each channel in the group Low current measurement ranges should not be used with grouped channels otherwise a measurement overload error will occur Low current output ranges however can be used Over current protection delay has a slightly slower response time 10 ms and slightly less resolution than an ungrouped channel When output channels have been grouped they are addressed using the channel number of the lowest channel in the group s Power limiting should not be used when Agilent N673xB N674xB and N677xA power modules are grouped Refer to Appe
154. ted at nominal 100 120 VAC In this case internal circuits will limit the power available to modules to 600 W Output Terminal Isolation Maximum Rating No power module output terminal may be more than 240 VDC from any other terminal or chassis ground Agilent N6781A Note When using the AUX measurement input terminals on Model N6781A no front panel output terminal or rear panel input terminal may be more than 60 VDC from any other terminal and chassis ground Dimensions Height Width Depth including handles 44 45 mm 1 75 in 432 5 mm 17 03 in 585 6 mm 23 06 in N6700B N6701A mainframes 633 9 mm 24 96 in N6702A mainframes Net Weight N6700B with 4 power modules N6701A with 4 power modules N6702A with 4 power modules Single power module typical 12 73 kg 28 lbs 11 82 kg 26 lbs 14 09 kg 31 Ibs 1 23 kg 2 71 Ibs 99 Appendix A Specifications Outline Diagram 5555 3555 5556 5555 Co 549 7 mm 560 2 mm 21 64 22 06 N6700B N6700B N6701A N6701A 598 0 mm 608 5mm ooc00 23 54 23 96 2990 h N6702A N6702A 999 SE q erer 00000 0000 O0000 0000 O0000 O000 00000 o000 O0000 0000 CO 00000 o000 O0000 0000 oo0o000
155. ted state You can immediately trigger the measurement as follows Front Panel SCPI Command Not Available To generate a measurement trigger on output 1 TRIG ACQ 1 Alternatively if the trigger source is BUS you can also program a TRG or an IEEE 488 lt get gt command As previously discussed a trigger can also be generated by another output channel or an input pin on the digital port connector If any of these systems are configured as the trigger source the instrument will wait indefinitely for the trigger signal If the trigger does not occur you must manually return the trigger system to the idle state The following commands return the trigger system to the idle state Front Panel SCPI Command Select Measure Control ABOR ACQ 1 Then select the Abort control Fetch the Measurement After a trigger is received and the data acquisition completes the trigger system will return to the idle state When this occurs you can use FETCh queries to return the measurement data Front Panel SCPI Command Not Available To return the voltage measurement FETC VOLT 1 To return the current measurement FETC CURR 1 E E If a FETCh query is sent before the measurement is finished the response will be delayed until the measurement trigger occurs and the acquisition completes You can test the MEAS_active bit in the operation status register to know when the measurement trigger system has returned
156. tem 4 Sequence Multiple Outputs Turn on and turn off delays control the power up and power down sequencing of the output channels in relation to each other Front Panel SCPI Command Press the Channel key to select an To program a 50 millisecond turn on output Then select delay for output 1 and a 100 Output Sequence Delay millisecond turn on delay for output 2 Select either Turn on or Turn off OUTP DEL RISE 05 1 OUTP DEL RISE 1 2 Enter a delay in seconds then press Select To program a 200 millisecond turn off Select System Preferences Keys 4 ay for outputs 3 and 4 Check On Off affects all channels OUTP DEL FALL 2 3 4 Output turn on characteristics vary across the power module types DC Power Autoranging Precision and Source Measure When output channels of the same module type are programmed off to on output sequencing is determined by the programmed turn on delays When outputs of different module types are sequenced there may be additional offsets of a few milliseconds from one output to another that must be accounted for Specifying a common delay offset assures that the programmed turn on delays will be synchronized to start at the completion of the common delay offset Select the delay offset of the slowest power module in the mainframe and use that as the common delay offset See Appendix D for more information Front Panel SCPI Command In the front panel m
157. tep transient Sets the output voltage Sets the triggered output voltage 19 1 Quick Reference SCPI Command Description SOURce VOLTage continued BWIDth LOW HIGH1 HIGH2 HIGH3 chanlist LIMIit POSitive IMMediate AMPLitude lt NRf gt chanlist COUPle lt Bool gt chanlist NEGative IMMediate AMPLitude lt NRf gt chanlist MODE FlXed STEP LIST chanlist PROTection LEVel lt NRf gt chanlist REMote POSitive LEVel lt NRf gt chanlist NEGative LEVel lt NRf gt chanlist TRACking STATe lt Bool gt chanlist OFFSet lt NRf gt chanlist RANGe lt NRf gt chanlist SLEW IMMediate lt NRf gt INFinity chanlist MAXimum lt Bool gt chanlist STATus OPERation EVENt chanlist CONDition chanilist ENABle lt NRf gt chanlist NTRansition lt NRf gt chanlist PTRansition lt NRf gt chanlist PRESet QUEStionable EVENt chanlist CONDition chanlist ENABle lt NRf gt chanlist NTRansition lt NRf gt chanlist PTRansition lt NRf gt chanlist SYSTem CHANnel COUNt MODel chaniist OPTion chanlist SERial chanlist COMMunicate RLSTate LOCal REMote RWLock TCPip CONTrol ERRor GROup CATalog DEFine chanlist DELete lt channel gt ALL 20 Sets the voltage bandwidth only on N678xA Sets the positive voltage limit only
158. terface Operating the Power System Chapter 4 describes how to use the advanced features of the power system using the front panel menus and the corresponding SCPI commands Specifications Appendix A describes specifications and supplemental characteristics Using the Digital Port Appendix B describes how to configure and use the digital port on the back of the instrument Power Allocation Appendix C describes the power allocation function which applies to power system in which the combined ratings of the power modules exceed the power rating of the mainframe Output On Off Synchronization Appendix D discusses output on off synchronization which lets you accurately synchronize output turn on sequences across multiple mainframes Source Operating Modes Appendix E discusses operating mode information for all power modules For complete details on the SCPI Standard Commands for Programmable Instruments commands refer to the N6700 Programmer s Reference Help file included on the Agilent N6700 Product Reference CD This CD ROM is shipped along with your instrument You can contact Agilent Technologies at one of the following telephone numbers for warranty service or technical support information In the United States 800 829 4444 In Europe 31 20 547 2111 In Japan 0120 421 345 Or use our Web link for information on contacting Agilent in your country or specific location www agilent com find
159. tion as more current is forced into the unit Once the current is exceeds 12 of the rated current of the range 1 12 A on the 1 A range 3 36 A on the 3 A range the output will shut down the output relays will open and the OC and PROT status bits will be set Series N6700 User s Guide Index A Admin menu password ss ssssnssseriessrressriessrrererreenrrenene 57 AIM le UE 26 27 100 E 62 allocation power 108 AULOFANGING ia 119 auxiliary voltage measurement 42 auxiliary voltage measurements 76 B bandwidth E 64 bench location ceeseecesseeseessesseeeseeteeeeseeseeeeeesteseeeetees 27 C capacitor external seisis 40 RU IM 3 RE 13 channel VOUP Sienn 37 89 locatio ciii eee 28 UMBEMI oisi aaea aeai 28 E 44 60 Eleng 28 connections UE 32 multiple NOG ee 33 negative voltage A0 parallel ees 36 POSITIVE voltage uu cecssessessessessessesessesestesteseeseeseeseesees 40 FEMOLE senslng 34 S IER EE 38 Contrast front pang 91 control port Connector 102 Control Sockets 56 Eeer 13 GPF ee 13 108 current measurement range ssecesessesessesessesesscsesteseseeseeneees 75 priority mode 61 returning current data 80 SEIN Oe 45 61 Curtent PLOT ity esisin i 121 Curtent SINKING siisii 119 Mere ee 13 Series N6700 User s Guide D AMA GO eis eae a ene nes 25 data SOCKe task tecestiashec teat ladies 56 ME 56 Declaration of confomfty 2 default gateuwan 53 digital 1 0 CONMFIQUIING essesse
160. to the idle state Front Panel SCPI Command Not Available To query the MEAS_active bit bit 5 STAT OPER COND 1 If a bit value of 32 is returned in the query the MEAS_active bit is true and the measurement is NOT complete When the MEAS_ active bit is false you can retrieve the measurement Refer to the N6700 Programmer s Reference Help file for more information 83 4 Operating the Power System Using the Protection Functions 84 DN oc OT Osc PF CP cP PROT INH Each output has independent protection functions A front panel status indicator will turn on when a protection function has been set Protection functions are latching which means that they must be cleared once they have been set As explained under Couple Output Protection you can configure the instrument so that when a protection fault occurs on one output ALL outputs will be turned off Of the following protection functions only OV OV OC OSC PROT and INH are user programmable Over voltage protection is a hardware OVP whose trip level is a programmable value The OVP is always enabled Negative over voltage protection is a hardware OVP whose trip level is a programmable value Only applies to Agilent N678xA Over current protection is a programmable function that can be enabled or disabled When enabled the output will be disabled when the output current teaches the current limit setting Over temperature
161. tput operation All parallel specifications referring to voltage are the same as for a single output except for CV load effect CV load cross regulation CV source effect and CV short term drift These are all twice the voltage programming accuracy including the percentage portion at all operating points Load transient specifications are typically twice the single output 37 2 Installation Series Connections WARNING SHOCK HAZARD Floating voltages must not exceed 240 VDC No output terminal may be more than 240 VDC from chassis ground CAUTION Only connect outputs that have identical voltage and current ratings in series Agilent Models N678xA cannot be connected in series To prevent currents from damaging the power system when the load is connected always turn series connected outputs on and off together Do not leave one output on while the other is off Connecting outputs in series provides a greater voltage capability than can be obtained from a single output Because the current is the same through each element in a series circuit outputs connected in series must have equivalent current ratings The following figures show how to connect two outputs in series to a single load If voltage drop in the load leads is a concern connect the sense leads of output 1 and output 2 for remote sensing as shown in the figure on the right Note that the sense lead of output 2 must remain connected to the sense terminal of o
162. trigger is ignored To ensure that no triggers are lost in a trigger paced list set the dwell time to zero Specify if you want the list to generate trigger signals that can be used to trigger actions on other output channels or on external equipment connected to the digital port SCPI Command To program a trigger at the beginning of step 4 for output 1 use LIST TOUT BOST 0 0 0 0 1 0 1 To program a trigger at the end of step 0 2 and 4 for output 1 use LIST TOUT EOST 1 0 1 0 1 0 Front Panel Select Transient List Config Select the List Step number To generate a trigger enter a 1 in the Tout Begin Step or Tout End Step field If a zero is entered no trigger is generated for the step Repeat this for each step Use the Step 6 Step 7 Step 8 74 1 T keys to select the next step Xi d Vol 4 2 3 4 5 0 1 2 3 4 5 Trigger at BOST Trigger at EOST Specify how you want the list to terminate For example if you want the list to remain at the values of the last list step when finished use SCPI Command To program output 1 use LIST TERM LAST 1 Front Panel Select Transient List Terminate Select Stop Last Step Press Select 1 If applicable specify how many times you want the list to repeat Sending the INFinity parameter in the SCPI command makes the list repeat indefinitely At reset the list count is set to 1
163. ue A positive current limit value should also be set The current limit should always be set higher than the actual output current requirement of the external load With tracking enabled the negative current limit tracks the positive current limit setting With tracking disabled you can set different values for the positive and negative current limits The following figure shows the voltage priority operating locus of the power modules The area in the white quadrants shows the output as a source sourcing power The area in the shaded quadrants shows the output as a load sinking power Voltage 20 V OV 6V Br t Va V setting i 1A 3A l Current 1A 3 A I limit l limit lt r Voltage operation applies to N6784A only Z i 20 V OV Key 6V Sourcing power Sinking power ak Programmable The heavy solid line illustrates the locus of possible operating points as a function of the output load As shown by the horizontal portion of the line the output voltage remains regulated at its programmed setting as long as the load current remains within the positive or negative current limit setting A CV constant voltage status flag indicates that the output current is within the limit settings Series N6700 User s Guide Source Operating Modes Appendix E When the output current reaches either the positive or negative current limit the unit no longer op
164. ue and press channel 1 by 100 points use Select SENS SWE OFFS POIN 100 1 When the value is 0 all values are taken after the trigger Values greater than 0 can be used to program a delay time from the receipt of the trigger until the values entered into the buffer are valid Delay time offset x sample period Negative values let you acquire samples prior to the trigger If during a pre trigger data acquisition a trigger occurs before the pre trigger data count is completed the measurement system ignores this trigger This will prevent the completion of the measurement if another trigger is not generated Specify a Window Function Windowing is a signal conditioning process that reduces the error in average measurements made in the presence of periodic signals and noise Two window functions are available Rectangular and Hanning At power on the measurement window is Rectangular The Rectangular window calculates average measurements without any signal conditioning However in the presence of periodic signals such AC line ripple a Rectangular window can introduce errors Series N6700 User s Guide 79 4 Operating the Power System when calculating average measurements This can occur when a non integral number of cycles of data has been acquired due to the last partial cycle of acquired data One way of dealing with AC line ripple is to use a Hanning window The Hanning window applies a cos weighting function to th
165. unction described in this section is not available on all models Refer to Chapter 1 Model Differences The digitizer function lets you access the enhanced voltage and current measurement capabilities of the power system You can Specify a measurement function and range Adjust the measurement sample rate to a maximum of 200 kHz per channel for Agilent N678xA power modules Adjust measurement triggers to capture pre trigger transients Select a measurement window that can attenuate AC noise Retrieve arrays of the digitized current or voltage measurement Synchronize measurements using trigger signals Programming the Digitizer Series N6700 User s Guide Select the Measurement Function and Range The following commands select a measurement function To enable the measurement function use Front Panel SCPI Command Not Available To enable voltage measurements on channel 1 SENS FUNC VOLT ON 1 To enable current measurements on channel 2 SENS FUNC CURR ON 2 If a power module has simultaneous measurements see chapter 1 Power Module Features you can enable BOTH voltage and current measurements on the same output channel Some power modules also have multiple measurement ranges Selecting a lower measurement range provides greater measurement accuracy provided that the measurement does not exceed the range To select lower measurement ranges use Front Panel SCPI Comman
166. urement trigger occurs and the acquisition completes This may tie up the computer if the measurement trigger does not occur immediately You can test the MEAS_active bit in the operation status register to know when the measurement has completed as explained in the following section Series N6700 User s Guide Operating the Power System 4 Synchronizing Digitizer Measurements Use the measurement trigger system to synchronize the acquisition of measurements with a Bus Transient or an external trigger Then use FETCh commands to return voltage or current information from the acquired data Briefly to make a triggered measurement 1 Select the measurement function to trigger 2 Select the trigger source 3 Initiate the trigger system and generate a trigger 4 Fetch the triggered measurements Select the Measurement Function to Trigger The following commands select a measurement function Front Panel SCPI Command Not Available To select the voltage measurement function SENS FUNC VOLT ON 1 To select the current measurement function SENS FUNC CURR ON 1 Some power modules have two measurement converters which allow simultaneous voltage and current measurements Refer to Chapter 1 Model Differences In that case BOTH voltage and current measurements can be enabled If a power module has only one converter the parameter that it measures either voltage or current must be specified Select the Measurem
167. utput 1 OUTPUT 2 OUTPUT 1 SENSE SENSE JUMPERS JUMPERS INSTALLED INSTALLED TWIST LEADS WITH LOCAL SENSING OUTPUT 2 OUTPUT 1 S S S sS SENSE JUMPER INSTALLED TWIST LEADS LOAD WITH REMOTE SENSING The following figure shows the connections for 50A power modules 38 Series N6700 User s Guide Installation 2 OUTPUT 3 OUTPUT 1 OUTPUT 3 OUTPUT 1 kg kg S LS LS S S LS LS S S LS LS S 8 LS LS S SENSE JUMPER SENSE INSTALLED JUMPERS INSTALLED TWIST LEADS TWIST LEADS LOAD WITH LOCAL SENSING WITH REMOTE SENSING Setting the Outputs Outputs connected together in series cannot be grouped To program outputs connected in series first program the current limit of each output to the total desired current limit point Then program the voltage of each output so that the sum of both voltages equals the total desired operating voltage The simplest way to accomplish this is to program each output to one half of the t
168. utputs to turn off and remain off until a protection clear command is given This is explained in chapter 4 under Clear Output Protection Functions A status bit PF will indicate that a power fault protection event has occurred The power allocation function lets you programmatically limit the power that can be sourced from individual power modules thereby preventing the combined power from exceeding the mainframe s rated output power and causing all the outputs to turn off For N6702A mainframes operating at 100 120 VAC nominal the sum of the channel power limit settings cannot exceed 600W due to a restriction on the AC line current There is no restriction when operating at 200 240 VAC nominal Module Power Limit When the power limit has been set to a value less than the maximum rating on a power module and either the output voltage or the output current increases to a point where the module exceeds the power limit setting the module s power limit function will activate If the power limit is left at the maximum rating then the power module will not enable its power limit function On Agilent N675xA and N676xA power modules the power limit function will limit the output power at its programmed setting A status bit CP will indicate that the output is in power limit mode When the power drawn by the load is reduced below the power limit setting the output automatically returns to normal operation either constant vo
169. vided under Items Supplied at the beginning of this chapter On power modules with the 50A sense connector the LS and JS terminals are ONLY used for local sense connections as illustrated Do not connect these terminals in any other way TIGHTEN SCREWS 50A CONNECTOR 12A amp 20 A 8A CONNECTOR LOCKING CONNECTOR LOCKING SC l 50A G 48 6 8 SCREW SCREW SENSE i i le S S OR a S LS LS S HS j SI INSERT S 2 S WIRES SENSE JUMPERS INSTALLED FOR 30 LOCAL SENSING INSERT WIRES SENSE JUMPERS INSTALLED FOR LOCAL SENSING TWIST LEADS Series N6700 User s Guide Wire Size Installation 2 FIRE HAZARD Select a wire size large enough to carry short circuit current without overheating refer to the table below To satisfy safety requirements load wires must be heavy enough not to overheat while carrying the short circuit output current of the unit Agilent Model N678xA wiring requirements are described on the following page Along with conductor temperature you must also consider voltage drop when selecting wire sizes The following table lists the resistance for various wire sizes and the maximum lengths to limit the voltage drop to 1 0 V per lead for various cu
170. vironment Temperature range Relative humidity Altitude Storage temperature LED statement Indoor use installation category II for AC input pollution degree 2 0 C to 55 C output current is derated 1 per C above 40 C ambient temperature Up to 95 Up to 2000 meters 30 C to 70 C Any LEDs in this unit are Class 1 LEDs as per IEC 825 1 Acoustic Noise Declaration This statement is provided to comply with the requirements of the German Sound Emission Directive from 18 January 1991 Sound Pressure Lp lt 70 dB A At Operator Position Normal Operation According to EN 27779 Type Test Schalldruckpegel Lp lt 70 dB A Am Arbeitsplatz Normaler Betrieb Nach EN 27779 Typpriifung Power Available to Modules Values represent combined power rating of all modules installed per mainframe AC Input Nominal Input Ratings Input Range Power Consumption units have power factor correction Fuse 400 W for N6700B mainframes 600 W for N6701A mainframes 1200 W for N6702A mainframes 100 VAC 240 VAC 50 60 400Hz 86 VAC 264 VAC 1000 VA N6700B mainframes 1500 VA N6701A mainframes 3000 VA N6702A mainframes Internal fuse not customer accessible Agilent N6702A Note AC mains circuits rated at nominal 100 120 VAC cannot supply enough current to power the N6702A mainframe when operated at its full rated power Nevertheless the N6702A can be connected to an AC mains circuit ra
171. y a channel or channels Output Sequence Couple OUTP COUP CHAN 1 2 3 4 Check which channels will be coupled To remove a channel uncheck the box 3 Specify the Turn On Delays for each Output Channel Turn on delays can be specified for all coupled output channels Any delay sequence can be implemented There are no restrictions on what the sequence is or what channel comes up first Front Panel SCPI Command For channels 1 2 3 and 4 select Program a turn on delays for channels Output Sequence Delay 1 through 4 Specify the Turn on delay for each OUTP DEL RISE lt 01 channel in seconds then press OUTP DEL RISe 02 Select D OUTP DEL RISE 03 OUTP DEL RISE 04 4 Specify the Common Delay Offset Specifying a common delay offset assures that the user programmed turn on delays will be synchronized to start at the completion of the common delay offset Select the delay offset of the slowest power module in the mainframe and use that as the common delay offset Front Panel SCPI Command In the front panel menu select To query the delay offset of the Output Sequence Couple slowest power module in the The Max delay offset for this frame mainframe the maximum delay field displays the delay offset of the offset in seconds slowest power module in the frame OUTP COUP MAX DOF E Enter the delay offset value of the To specify the common delay offset slowest power module in the Delay f

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