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Agilent Technologies 6813B User's Manual

1. 3 rd NS P a q Pa is E vA aR go 0 90 Figure 4 7 Trigger Delays and Phase Synchronization Example This example uses the default trigger parameters First access the Voltage menu and program the immediate and triggered voltage levels followed by the voltage transient mode Then press Trigger Control and Enter followed by Shift Trigger In this example you will set a trigger delay First access the Voltage menu and program the immediate and triggered voltage levels followed by the voltage transient mode Press Trigger Control Then press v until you access the delay parameter On the Entry keypad press 0 1 6 7 Enter Then press Trigger Control and Enter followed by Shift Trigger This example uses the phase sync mode with no delay but synchronized at 90 First access the Voltage menu and program the immediate and triggered voltage levels followed by the voltage transient mode Press Trigger Control Press w until you access the delay parameter If necessary set it to 0 Press V until you access the sync source command On the Entry keypad press to obtain PHASE Press Enter Access the Trigger Control menu again and press W to access the sync phase reference parameter On the Entry keypad program a 90 phase reference by entering 9 0 Enter Then press Trigger Control and Enter followed by Shift Trigger 54 Display VOLT 120 VOLT T 150 VOLT M STEP INIT IMMED VOLT 120
2. Programming Time Recommended Calibration Interval Regulatory Compliance Listed to Certified to Conforms to RFI Suppression Complies with Dimensions Height add 12 7 mm or 0 5 in for feet Width Depth Net Weight Shipping Weight 62 Agilent 6811B Agilent 6812B Agilent 6813B 100 us 200 us to 4 3 x 105 seconds 0 01 0 to 100 1 to Infinity Pulses 1 to 100 steps 200 us 1 to Infinity LIST repeats 200 us 1 kHz 1024 points 300 600 1200 2400 4800 9600 7 bits even or odd parity 8 bits without parity SCPI Standard Commands for Programmable Instruments Elgar 9012 PIP Vol 0 8 max 1 25 mA Voh 3 3 V max 1 25 mA Vi 0 8 V max Vip 2 V max 16 5 Vdc between INH terminals FLT terminals and from INH terminals to chassis ground I 1 25 mA max Vol 0 5 Vmax Vi 0 8 V max Vip 2 V min tw 100 us min td 4 ms typical 16 0 to 15 12 with 1024 data points in each 1 to 100 steps for each list function SCPI Elgar 9012 PIP AH1 C0 DC1 DT1 E2 LE1 PPO RL1 SH1 SR1 TE6 10 ms 1 year UL 3111 1 CSA 22 2 No 1010 1 IEC 1010 CISPR 11 Group 1 Class A 132 6 mm 5 25 in 425 5 mm 16 75 in 574 7 mm 22 6 in 28 2 kg 62 lb 32 7 kg 72 lb 31 8 kg 70 lb 36 4 kg 80 1b Operation Below 45 Hz Specifications A The following operating characteristics apply for output frequencies between 45Hz and 1Hz Below 1 Hz instantaneous
3. 45 100 Hz gt 100 500 Hz gt 500 Hz 1 kHz Power VA High Range 45 100 Hz gt 100 500 Hz gt 500 Hz 1 kHz Power Watts Low Range 45 100 Hz gt 100 500 Hz gt 500 Hz 1 kHz Power Watts High Range 45 100 Hz gt 100 500 Hz gt 500 Hz 1 kHz Power Factor Voltage Magnitude Current Magnitude Low Range Fundamental Harmonics 2 49 Current Magnitude High Range Fundamental Harmonics 2 49 Specifications subject to change without notice 2These specifications are subject to the restrictions of Table 1 3 Table A 1 Performance Specifications continued Agilent 6811B 6812B 6813B 0 05 10 mA 0 05 15 mA 0 05 30 mA 0 05 1 5 mA 0 05 8 mA 0 05 25 mA 0 05 150 mA 0 03 150 mA 0 1 1 5 VA 1 2 mVA V 0 1 2 VA 1 2 mVA V 0 1 6 VA 1 2 mVA V 0 1 1 5 VA 12 mVA V 0 1 2 VA 12 mVA V 0 1 6 VA 12 mVA V 0 1 0 3 W 1 2 mW V 0 1 1 2 W 1 2 mW V 0 1 2 5 W 1 2 mW V 0 1 0 3 W 12 mW V 0 1 1 2 W 12 mW V 0 1 2 5 W 12 mW V 0 01 0 03 100 mV 0 2 kHz 0 03 1 5 mA 0 03 1 mA 0 2 kHz 0 05 5 mA 0 03 3 mA 0 2 kHz 3Product may be operated between dc and 45 Hz subject to operating conditions described in Table A 3 60 Supplemental Characteristics Specifications A Table A 2 lists the supplemental characteristics which are not warranted but are descriptions of
4. Entry Keys 38 14 character vacuum fluorescent display for showing programmed commands and measured values Annunciators light to indicate operating modes and status conditions ol Phase 1 is being controlled or metered CV The ac source output is in constant voltage mode CC The ac source output is in constant current mode Unr The ac source output is in an unregulated state Dis The ac source output is disabled off Tran The ac source output is initialized to output a transient OCP The overcurrent protection state is enabled Prot One of the ac source s output protection features is activated Cal The ac source is in calibration mode Shift The Shift key is pressed to access an alternate key function Rmt The selected interface GPIB or RS 232 is in a remote state Addr The interface is addressed to talk or to listen Err There is a message in the SCPI error queue SRQ The interface is requesting service from the controller Meter Front panel measurement functions are ac only dc only or act dc AC DC Output The ac source output coupling is ac only or act dc AC DC The rotary pulse generators let you set the output voltage and frequency when the ac source is in local mode Their response is rate sensitive Turning a control rapidly provides coarse control of the value Turning a control slowly provides fine control of the value This turns the ac source on or off The system keys let you Return to Local mod
5. meter display keys Harmonic 41 Input 41 Meter 41 N non volatile memory clearing 58 storing 39 OCP 49 offset 48 operating features 13 options 12 OT 49 output ac dc 48 characteristic 15 clearing output protection 49 connections 24 connector 21 control keys Output 43 rating 15 setting output protection 49 setting the amplitude 47 setting the dc offset 48 setting the frequency 48 Output AC DC 38 output checkout 32 output control keys Current 42 Freq 42 88 Phase 43 Pulse 43 Shape 43 Voltage 42 output coupling ac 19 48 dc 19 48 output impedance lt 1 ohm 18 reactive 18 real 18 OV 49 OVLD 34 PpP parts operator replaceable 13 peak current capability 16 peak current limit 16 peak inrush capacitance 16 Peak Inrush current measuring 57 Phase synchronization 53 power cord 21 installation 23 power receptacle 12 preliminary checkout 31 print date 6 program listing calibration 76 protection OCP 49 OT 49 OV 49 Rail 49 RI 49 SOA 49 protection status keys Protect 44 Status 44 Pulse 51 rack mount kit 12 rack mounting 22 Rail 49 real time voltage regulation 18 recalling operating states 58 remote programming 15 remote sensing 25 OVP considerations 27 repacking 21 RI 49 rms current limit 18 rms voltage regulation 18 RS 232 58 connections interface commands 29 data format 29 handshake 30 interface ca
6. 0 00 CAL LEV P4 CAL DATA 0 00 Connect the negative terminal of the DVM to the COM output terminal Note that some calibration points are negative be sure to enter the CAL DATA as negative values when required 14 15 16 17 18 19 20 21 Action Connect the DVM dc volts mode directly to the ac source Do not connect the ratio transformer or load resistor shown in Figure B 1 Press Shift Calibration scroll to the CAL VOLT DC command and press Enter Press Shift Calibration scroll to the CAL LEV P1 command and press Enter to select the first calibration point Press Shift Calibration scroll to CAL DATA 0 00 and use the Entry keypad to enter the dc voltage value displayed on the DVM Press Shift Calibration scroll to the CAL LEV P1 command use to scroll to the P2 parameter and press Enter This selects the second calibration point Press Shift Calibration scroll to CAL DATA 0 00 and use the Entry keypad to enter the dc voltage value displayed on the DVM Press Shift Calibration scroll to the CAL LEV P1 command use to scroll to the P3 parameter and press Enter Press Shift Calibration scroll to CAL DATA 0 00 and use the Entry keypad to enter the dc voltage value displayed on the DVM Display CAL VOLT DC CAL LEV P1 CAL DATA 0 00 CAL LEV P2 CAL DATA 0 00 CAL LEV P3 CAL DATA 0 00 The ac source is now holding the new dc voltage gain calibration constants in R
7. AC L LEV P1 9 Point 1 entered L DATA Ai_pl L LEV P2 PUT Enter AC rms current DVM reading divided by shunt resistance 11 Point 2 entered L DATA Ai_p2 5 CALIBRATING CURRENT MEASUREMENT 7 There are 2 points to be calibrated L CURR MEAS L LEV P1 PUT Enter AC rms current DVM reading divided by shunt resistance 9 Point 1 entered L DATA Am_pl L LEV P2 PUT Enter AC rms current DVM reading divided by shunt resistance 11 Point 2 entered L DATA Am_p2 L SAVE L STATE OFF o 1l Turn off the AC Source 7 2 Disconnect all equipment from the AC Source 9 3 Connect the 1 ohm impedance resistor see fig B 11 4 Turn on the AC Source T to begin Output Impedance calibration 10 CALIBRATING OUTPUT IMPEDANCE L STATE ON L IMP 15 WAIT L SAVE L STATE OFF 10 CALIBRATION COMPLETE Ai_pl Ai_p2 Am p1 Am_p2 1 Figure B 2 Calibration Program Listing Sheet 3 of 3 79 Error Messages Error Number List This appendix gives the error numbers and descriptions that are returned by the ac source Error numbers are returned in two ways Error numbers are displayed on the front panel Error numbers and messages are read back with the SYSTem ERRor query SYSTem ERRor returns the error number into a variable and returns two parameters an NR1 and a string The following table lists the errors that are associa
8. VOLT T 150 VOLT M STEP DELAY 0 DELAY 0167 INIT IMMED VOLT 120 VOLT T 150 VOLT M STEP DELAY 0 SYNC SOUR PHASE SYNC PHAS 90 INIT IMMED Front Panel Operation 4 8 Using Slew Rates to Generate Waveforms As shown in the previous examples there are a number of ways that you can generate custom waveforms Programmable slew rates provide additional flexibility when customizing waveforms The following figure illustrates how programmable slew rates are applied in the transient operating modes In example an immediate slew rate of 50 volts second is used whenever a new output voltage is programmed In example a triggered slew rate of 50 volts second steps the voltage level to its new value 50 volts second becomes the new immediate slew rate in step mode In example a triggered slew rate of 50 volts second is used at the start of the pulse The immediate slew rate of infinity applies at the trailing edge of the pulse In example the slew rates are set by the values in the voltage slew list New VOLT level x 1 SLEW MODE FIXED VOLT T level 2 SLEW MODE STEP E SLEW rate lt SLEW rate eN X z x pe i lt E gt SLEW T ra width gt 2 lt SLEW 2 lt SLEW rate VOLT level 4 SLEW MODE LIST 1 gt sews SLEW 1 l TRIGGER LIST APPLIED COMPLETE Figure 4 8 Programming Slew Rates 55 NOTE 4 Front Panel Operation Example This exa
9. ac source Front Panel Operation 4 Examples of Front Panel Programming You will find these examples on the following pages Setting the output voltage amplitude Setting the output frequency Setting the dc offset Setting a protection feature Clearing a protection feature Generating step pulse and list transients Programming trigger delays and phase synchronization Programming slew rates Measuring peak inrush current 10 Setting the GPIB address or RS 232 parameters 11 Saving and recalling operating states OMANADANPWNKH The examples in the ac source Programming Guide are similar to the ones in this section except that they use SCPI commands 1 Setting the Output Voltage Amplitude NOTE The maximum voltage that the ac source can output is limited by the peak value of the waveform which is 425 Vpeak Since the output is programmed in units of rms volts the maximum value that can be programmed is dependent on the peak to rms ratio of the selected waveform For a sinewave the maximum ac voltage that can be programmed is 300 Vms For other waveforms the maximum may be different When you turn on the ac source the default output shape is a 60 Hz sinewave at 0 Vrms There is no output from the ac source because the default output state is OFF as indicated by the Dis annunciator Set the output to 120 V rms as follows Action Display You can set the voltage in any of three ways 1 On the Function keypad press Volt
10. changed to GPIB
11. cord is not included contact your nearest Agilent Sales and Support Office refer to the list at the back of this guide Digital connector 4 terminal digital plug that connects to the back of the unit Safety covers Ac input cover with strain relief Ac output cover Manuals User s Guide Programming Guide Quick Start Guide Quick Reference Card Change page If applicable change sheets may be included with this guide If there are change sheets make the indicated corrections in this guide Cleaning Use a dry cloth or one slightly dampened with water to clean the external case parts Do not attempt to clean internally WARNING To prevent electric shock unplug the unit before cleaning 21 2 Installation Location Refer to the Safety Summary page at the beginning of this manual for safety related information about environmental conditions CAUTION Agilent 6811B 6812B units weigh 28 2 kg 62 lbs Agilent 6813B units weigh 32 7 kg 72 Ibs Obtain adequate help when moving or mounting the unit in the rack Bench Operation The outline diagram in figure 2 1 gives the dimensions of your ac source The feet may be removed for rack mounting Your ac source must be installed in a location that allows sufficient space at the sides and back of the unit for adequate air circulation Minimum clearances are 1 inch 25 mm along the sides Do not block the fan exhaust at the rear of the unit Rack Mounting The ac source can b
12. follows 1 On the System keypad press Address ADDRESS 5 2 Enter the new address For example Press 7 Enter ADDRESS 7 To configure the RS 232 interface proceed as follows 1 On the System keypad press Address ADDRESS 5 2 Scroll through the Address menu by pressing Y The interface command INTF RS232 lets you select the RS 232 interface The baudrate command lets you BAUDRATE 600 select the baudrate The parity command lets you select the parity PARITY EVEN 3 The and keys let you select the command parameters 11 Saving and Recalling Operating States You can save up to 16 states from location 0 to location 15 in non volatile memory and recall them from the front panel All programmable settings are saved List data however cannot be saved in state storage Only one list is saved in non volatile memory Action Display To save an operating state in location 1 proceed as follows 1 Set the instrument to the operating state that you want to save 2 Save this state to location 1 Press Shift Save 1 Enter SAV 1 To recall a saved state in location 1 proceed as follows 1 Recall the state saved in location 1 by pressing Recall 1 Enter RCL 1 To select the power on state of the ac source proceed as follows 1 On the Function keypad press Shift Output and scroll through the Output PON STATE RST menu until you get to the PON state command 2 Use the and keys to select either RST or RCLO RST sets the power o
13. position of a bi stable push control Caution risk of electric shock Caution hot surface Caution refer to accompanying documents peban e o r rz Q 2 The WARNING sign denotes a hazard It calls attention to a procedure practice or the like WARNING which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met Caution The CAUTION sign denotes a hazard It calls attention to an operating procedure or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Do not proceed beyond a CAUTION sign until the indicated conditions _are fully understood and met Declaration Page DECLARATION OF CONFORMITY according to ISO IEC Guide 22 and EN 45014 Manufacturer s Name Agilent Technologies Inc Manufacturer s Address 140 Green Pond Road Rockaway New Jersey 07866 U S A declares that the Product Product Name a AC Power Source Analyzer b Harmonic Flicker Test System Model Number s a Agilent 6811B 6813B 6812B 6811A 6812A 6813A b Agilent 6841A 6842A conforms to the following Product Specifications Safety TEC 1010 1 1990 A1 1992 EN 61010 1 1993 EMC CISPR 11 1990 EN 55011 1991 Group 1 Class A TEC 801 2 1991 EN 50082 1 1992 4 kV CD 8kV AD TEC 801 3 1984 EN 50082 1 1992 3 V m TEC 801 4 1988
14. rms current value DVM ac rms voltage shunt resistance and use the Entry keypad to enter the rms current Display CAL VOLT PROT Display CAL CURR AC CAL LEV P1 CAL DATA 0 00 CAL LEV P2 CAL DATA 0 00 Verification and Calibration B Calibrating and Entering rms Current Measurement Values Action Display 40 Connect the DVM ac rms mode current shunt and load resistor as shown in figure B 1 with S1 closed 41 Press Shift Calibration scroll to the CAL CURR MEAS command and CAL CURR MEAS press Enter 42 Press Shift Calibration scroll to the CAL LEV P1 command and press CAL LEV P1 Enter 43 Press Shift Calibration scroll to the CAL DATA 0 00 command CAL DATA 0 00 Calculate the rms current value DVM ac rms voltage shunt resistance and use the Entry keypad to enter the rms current 44 Press Shift Calibration scroll to CAL LEV P1 command use to scroll CAL LEV P2 to the P2 parameter and press Enter 45 Press Shift Calibration scroll to the CAL DATA 0 00 command CAL DATA 0 00 Calculate the rms current value DVM ac rms voltage shunt resistance and use the Entry keypad to enter the rms current The ac source is now holding the new rms current measurement calibration constants in RAM Calibrating the Output Impedance Action Display 46 Connect only the output impedance resistor across the output of the ac source Do not connect any other equipment 47 Press Shift Calibration scrol
15. string Query UNTERMINATED after indefinite response Selftest Errors 0 through 99 sets Standard Event Status Register bit 3 No error Non volatile RAM RDO section checksum failed Non volatile RAM CONFIG section checksum failed Non volatile RAM CAL section checksum failed Non volatile RAM WAVEFORM section checksum failed Non volatile RAM STATE section checksum failed Non volatile RAM LIST section checksum failed Non volatile RAM RST section checksum failed RAM selftest DAC selftest error expected lt n gt read lt reading gt Errors 11 12 13 14 15 apply to DAC12 1A and 1B Errors 16 17 18 apply to DAC12 2A Errors 19 20 21 apply to DAC12 2B Errors 22 23 apply to DAC12 4A Errors 24 25 apply to DAC12 4B Errors 26 27 28 apply to DAC12 3A and 3B Errors 29 30 31 apply to DAC12 5A and 5B 211 212 213 214 215 216 217 218 219 220 221 222 223 224 401 402 404 405 406 600 601 602 603 604 605 606 607 608 609 610 Error Messages C Voltage selftest error output 1 Voltage selftest error output 2 Voltage selftest error output 3 Current selftest error output 1 Current selftest error output 2 Current selftest error output 3 Fan voltage failure Digital I O selftest error Device Dependent Errors 100 through 32767 sets Standard Event Status Register bit 3 Outgrd not responding Front panel not responding Ingrd receiver framing error Ingrd uart overrun s
16. the ac source In example A the INH input connects to a switch that shorts pin to pin L whenever it is necessary to disable output of the unit This activates the remote inhibit RI circuit which turns off the ac output The front panel Prot annunciator comes on and the RI bit is set in the Questionable Status Event register To re enable the unit first open the connection between pins and L and then clear the protection circuit This can be done either from the front panel or over the GPIB RS 2372 27 2 Installation In example B the FLT output of one unit is connected to the INH input of another unit A fault condition in one of the units will disable all of them without intervention either by the controller or external circuitry The controller can be made aware of the fault via a service request SRQ generated by the Questionable Status summary bit NOTE Connectors are removable FLT Output ING m7 INH Input INH Common Switch EZ gt INH Input Normally A Open i y is ee FLT Output A INH Example with One Unit B FLT Example with Multiple Units Figure 2 6 FLT INH Examples Controller Connections The ac source connects to a controller either through a GPIB or an RS 232 connector GPIB Connector Each ac source has its own GPIB bus address AC sources may be connected to the bus in series configuration star configuration or a combination of the two You may connect from 1 to 1
17. the range of 20 to 1000 microhenries Resistive load impedances can be programmed in the range of 0 to 1 ohms When programming output impedances the lower your load impedance the LESS programmed impedance you can use and still maintain output voltage stability This applies particularly for load impedances less than 1 ohm 18 General Information 1 CAUTION Programming the ac source output impedance into a load with a low impedance can cause output voltage instability which may damage the ac source Stability MUST be maintained when operating the ac source with programmable resistance or inductance To check for stability monitor the output voltage with an oscilloscope Instability exists if a 5kHz to 20kHz oscillation which is dependent upon the ac source s programmed inductance and the capacitance of the load is present at any time during the following procedure 1 When programming inductance it is recommended that you first add a series resistance either by programming the output resistance to 1 ohm or by adding an equivalent external resistor 2 Slowly program the inductance to the desired level while monitoring the output for any voltage instability Do not proceed any further if the output shows any signs of instability 3 If less output resistance is required slowly start lowering the resistance while monitoring the output for any voltage instability Do not proceed any further if the output shows any signs of in
18. the reference phase angle to 75 In the Trigger Control menu press Y to access the sync phase command Then press 7 5 Enter Initiate or enable the unit for one immediate trigger from the front panel Press Trigger Control and Enter Set the meter function to measure nonrepetitive peak inrush current In the Meter menu press W to access the peak inrush current display Enable the output by pressing Output On Off Send the trigger to step the output from 0 V to 120 V Press Shift Trigger The inrush current is displayed on the Meter Display VOLT 0 VOLT T 120 VOLT M STEP SLEW T 9 9000 E37 CURR LEV 6 5 CURR PEAK 40 SYNC SOUR PHASE SYNC PHAS 75 INIT IMMED 0A PK NR OV 60HZ 48 A PKNR With fast and or large voltage transitions the CC annunciator may turn on due to current in the output capacitor This is normal and will limit the rate of change of output voltage To prevent the CC operating mode from limiting the rate of change of output voltage program the peak current limit to a higher value 57 4 Front Panel Operation 10 Setting the GPIB Address and RS 232 Parameters Your ac source is shipped with the GPIB address set to 5 This address can only be changed from the front panel using the Address menu located under the Address key This menu is also used to select the RS 232 interface and specify RS 232 parameters such baud rate and parity Action Display To set the GPIB address proceed as
19. the way you do not need to disconnect any cables Locate the connector in front of the power transformer For 100 V 200 V or 208 V operation install the plug on the connector labeled 200 V input For 120 V or 230 V operation install the plug on the connector labeled 240 V input Replace the pc board and inner cover NOTE Be sure to replace all of the screws removed in steps 9 and 11 Close the Unit Replace the outer cover Change the label on the rear panel to reflect the changed input voltage rating Reconnect the power and turn on the unit NOTE Line voltage conversion does not require any fuse changes II WARNING If LEDs are on HAZARDOUS voltages are present RIGHT SDE a LEFT SIDE with cover removed with cover removed il mimi oe i 4 uh n fC m Wea Ma a A A SN L Pa X S O SX o o N P Jumper Settings N 5 TAE E tool To fo tite 9 Eppe eN P OE Co VRE wf e zp SE 8 J RG E NE N y 3 K Pa Figure D 1 Line Voltage Conversion Components 86 A A ac line conversion 85 accessories 12 airflow 22 annunciators o1 38 Addr 38 Cal 38 CC 38 CV 38 Dis 38 Err 38 OCP 38 Prot 38 Rmt 38 Shift 38 SRQ 38 Tr
20. this key to access the output menu list Display OUTP COUP lt char gt RST TTLT SOUR lt char gt TTLT STATE lt value gt IMP STATE lt value gt IMP REAL lt value gt IMP REAC lt value gt PON STATE lt char gt RI lt char gt DFI lt char gt DFI SOUR lt char gt Notes value a numeric value Command Function Select output coupling AC or DC Execute RST command to place the ac source in the factory default state Select Trigger Out source coupling BOT EOT or LIST BOT beginning of trensient EOT end of transient LIST TTLT trigger see Programming Guide Set Trigger Out state ON or OFF Set output impedance programming ON or OFF Set real part of output impedance Set reactive part of output impedance Select power on state command RST or RCLO Sets remote inhibit mode LATCHING LIVE or OFF Sets discrete fault indicator state ON or OFF Select the DFI source QUES OPER ESB RQS or OFF see Chapter 4 of Programming Guide char a character string parameter and scroll through the command list and scroll through the parameter list 43 4 Front Panel Operation Protection and Status Control Keys The Protect and Status keys control the protection functions and status registers of the ac source Refer to Chapter 4 of the Programming guide for more information on the status registers Press this key to access the protection menu list Display Command Function PROT CLEAR Clear the
21. to eliminate output current measurement error caused by voltage drops in the load leads and connections It has special current monitoring terminals inside the load connection terminals Connect the voltmeter directly to these current monitoring terminals A ratio transformer is required only when verifying output voltage readback to MIL STD 45662A 4 1 test equipment ratio requirements Test Setup Figure B 1 shows the setup for the tests Be certain to use load leads of sufficient wire gauge to carry the full output current see Chapter 2 Agilent 681 1B 6812B 6813B Agilent 3458A SENSE DMM K com COM l ISIS Agilent 3458A 1 30 DMM oa R Load resistor for CC test 20 ohms Rs Current Monitor resistor 0 01 ohms Rz Impedance resistor 1 ohm S1 Switch is for convenience not required Figure B 1 Verification amp Calibration Test Setup 66 Verification and Calibration B Performing the Verification Tests The following procedures assume you understand how to operate the ac source from the front panel as explained in Chapter 4 When performing the verification tests from a GPIB controller you may have to consider the relatively slow settling times and slew rates of the ac source as compared to computer and system voltmeters Suitable WAIT statements can be inserted into the test program to give the ac source tim
22. values meet the dc specifications The ac source output is set to sinewave dc coupled real time regulation and is connected to a linear load Table A 3 Operation Below 45 Hz Real Power watts 1750 10 Hz 750 375 675 287 142 5 Hz 1 2 4 6 8 10 Frequency linear scale 45 Hz 5 Hz 100 1 10 Frequency 0 1 error 40Hz 1 error 10Hz 30 error 2Hz 3dB point slope of 1 20dB decade 20 10 100 Frequency Reactive power VA 1750 10 Hz 750 375 0 1 2 4 6 8 10 Frequency linear scale RMS current programming accuracy error 10 2 error at 10 Hz 20 30 Frequency Meets Measurement Accuracy specifications under the following conditions Minimum Maximum allowable measured frequency component Sample rate frequency to avoid aliasing 25 us 45 Hz 20 kHz 50 us 22 5 Hz 10 kHz 100 us 11 25 Hz 50 kHz 200 us 5 625 Hz 2 5 kHz 250 us 4 5 Hz 2 kHz Anti aliasing filters have a corner frequency of 12 5 kHz 63 40 Verification and Calibration Introduction This appendix includes verification and calibration procedures for the Agilent 6811B 6812B 6813B AC Power Solutions Instructions are given for performing the procedures either from the front panel or from a controller over the GPIB The verification procedures do not check all the operating parameters but verify that the ac source is performing properly Performance
23. 0053 Screw 5 ac output barrier block 6 32 x 5 16 in N A User s Guide this manual 5962 0829 Programming Guide 5962 0889 Quick Start Guide 5962 0883 Quick Reference Card 5962 0885 Description The ac source combines three instruments in one unit as shown in the following figure The function generator produces waveforms with programmable amplitude frequency and shape The power amplifier amplifies the function generator signal to produce the ac power for your application The measurement functions range from a simple readback of rms voltage and current to sophisticated capabilities such as waveform analysis SOURCE WAVEFORM BIPOLAR MEASUREMENT GENERATOR AMPLIFIER BLOCK Nh N Ne POWERMETER FFT ANALYZER Figure 1 1 AC Source Functional Elements 13 1 General Information The following model ac power sources are described in this User s Guide Model Description Agilent 6811B 0 300 V rms 375 VA 425 V peak 40 A peak Agilent 6812B 0 300 V rms 750 VA 425 V peak 40 A peak Agilent 6813B 0 300 V rms 1750 VA 425 V peak 80 A peak Capabilities Programmable ac voltage dc voltage frequency phase and current limit eff eff o o Sine square clipped sine and user definable waveforms Programmable output impedance Voltage and frequency slew control Synthesized waveform generation for high resolution and accuracy in frequency low waveform distortion and glitch fr
24. 045 A A Tout 0 0045 A High Range Tout 0 0175 A A Tout 0 0175 A lout calculated output current 60Hz Table B 4 Agilent 6813B Verification Test Record Model Agilent Report No Date Test Description Minimum Recorded Results Maximum Specification Specification Voltage Programming and Measurement Accuracy 300 Vrms accuracy at 45 Hz 299 250 V V 300 750 V Front Panel Measurement Vrms 190 mV V Vrms 190 mV 300 Vrms accuracy at 400 Hz 298 200 V V 301 800 V Front Panel Measurement Vrms 190 mV V Vrms 190 mV 300 Vrms accuracy at 1 kHz 296 700 V V 303 300 V Front Panel Measurement Vrms 400 mV V Vrms 400 mV DC Programming and Measurement Accuracy 425 Vdc accuracy 422 575 V V 427 425 V Front Panel Measurement Vdc 0 277 V V Vrms 0 277 V 425 Vdc accuracy 422 575 V V 427 425 V Front Panel Measurement Vdc 0 277 V _V Vrms 0 277 V RMS Current Measurement Accuracy Low Range Tout 0 0045 A A Tout 0 0045 A High Range Tout 0 0175 A A Tout 0 0175 A out calculated output current 60Hz 70 Verification and Calibration B Performing the Calibration Procedure Table B 1 lists the equipment required for calibration Figure B 1 shows the test setup NOTE You do not have to do a complete calibration each time You may calibrate only the voltage or current and proceed to Saving the Calibration Constants However before you calibrate OVP you must first calibrate the
25. 30 NPUT Enter DC offset voltage reading from DVM Off_pl 340 RINT TABXY 25 9 Point 1 entered 350 UTPUT Ac CAL DATA Off_pl 360 UTPUT Ac CAL LEV P2 370 AIT 10 380 NPUT Enter DC offset voltage reading from DVM Off_p2 390 RINT TABXY 25 11 Point 2 entered 400 UTPUT Ac CAL DATA Off_p2 410 UTPUT Ac CAL LEV P3 420 AIT 10 430 NPUT Enter DC offset voltage reading from DVM Off_p3 440 RINT TABXY 25 13 Point 3 entered 450 UTPUT Ac CAL DATA Off_p3 460 UTPUT Ac CAL LEV P4 470 AIT 10 480 NPUT Enter DC offset voltage reading from DVM Off_p4 490 RINT TABXY 25 15 Point 4 entered 500 UTPUT Ac CAL DATA Off_p4 lee AIT 3 520 LEAR SCREEN ea RINT TABXY 25 5 CALIBRATING DC VOLTAGE GAIN 540 RINT TABXY 20 7 There are 3 points to be calibrated oO oO jo O g PUT Ac CAL VOLT DC Figure B 2 Calibration Program Listing Sheet 1 of 3 77 B Verification and Calibration 560 OUT NP R C P P AE Sae s E e E Ee p lt R R S AU 3 3 P 3 3 P GAAZPQGGHWAZPGGAAE 3 3 930 A 940 NP 950 R 960 UT 970 UT 980 A 990 NP 000 R QP PAaWE 3 c PUT Ac CA T 10 L LEV P1 UT Enter DC voltage reading from DVM Dc_p1 T TABXY 25 PUT Ac CA PUT Ac CA T TO 9 Point 1 entered L DATA Dc_pl L LEV P2 UT Enter DC voltage reading from DVM Dc_p2 T TABXY 25 PUT Ac CA PUT Ac CA T 10 11 Point 2 entered
26. 4 Status la a Protect Shape Phase Select XS et a Trigger List Fa pa a Trigger Pulse Output Control on off L 2 j A Figure 4 3 Function Keys Immediate Action Keys Immediate action keys immediately execute their corresponding function when pressed Other function keys have commands underneath them that are accessed when the key is pressed Output On Off Phase Select This key toggles the output of the ac source between the on and off states It immediately executes its function as soon as you press it When off the ac source output is disabled and the Dis annunciator is on This key only applies to three phase ac sources Sends an immediate trigger to the ac source Scrolling Keys Scrolling keys let you move through the commands in the presently selected function menu EIE EaR 40 These scroll keys let you move through the choices in a command list Press to bring up the next command in the list Press to go back to the previous command in the list Function menus are circular you can return to the starting position by continuously pressing either key The following example shows the commands in the Input function menu These shifted scroll keys apply only to the Harmonic and List functions Press these keys to step through integers 0 through 50 when specifying the desired harmonic number or 0 through 99 when specifying the desired list point Hold down these keys to rapidly acce
27. 47 Option 848 8120 8605 8120 8106 8120 8609 8120 8610 8120 8608 8120 8611 Agilent 6811A Agilent 6811A holene iA Agilent 6811A Agilent 6811A Agilent 6811A Agilent 6811A Figure 2 2 Power Cord Plug Configurations WARNING Installation of the power cord must be done by a qualified and licensed electrician and must be in accordance with local electrical codes See Figure 2 3 while performing the following procedure a If they are not already in place position the strain relief connector 9 safety cover 5 rubber boot 8 and connector nut 7 on the power cord 6 Secure the ground wire 2 to the chassis earth ground stud Connect the neutral wire 1 to the N power input terminal Connect the line 3 to the L1 power input terminal Position the safety cover over the power input terminals and tighten the cover and strain relief connector screws Papp 23 2 Installation 1 GROUND CONNECTION GRN YEL OR GRN 2 LINE CONNECTION BROWN OR BLACK 3 NEUTRAL CONNECTION BLUE OR WHITE 4 POWER CORD 5 CONNECTOR NUT 6 RUBBER BOOT 7 POWER SAFETY COVER 8 STRAIN RELIEF CONNECTOR Figure 2 3 Connecting the Power Cord Output Connections The power output terminal block has a floating output terminal connection and a floating neutral line for the return connection A separate earth ground terminal is located on the extreme right o
28. 5 ac sources to a controller GPIB interface NOTE The ac source is shipped from the factory with its GPIB address set to 5 This address can be changed as described in Chapter 4 of this guide 28 Installation 2 RS 232 Interface The ac source provides an RS 232 programming interface which is activated by commands located under the front panel Address key When the RS 232 interface is selected the GPIB interface is disabled NOTE Sending or receiving data over the RS 232 interface when not configured for REMOTE operation can cause unpredictable results Always make sure the ac source is configured for remote operation when using the RS 232 interface Interface Commands All SCPI commands are available through RS 232 programming The SYSTem LOCal SYSTem REMote and SYSTem RWLock commands are only available through the RS 232 interface SYSTem LOCal Places the ac source in local mode during RS 232 operation The front panel keys are functional SYSTem REMote Places the ac source in remote mode during RS 232 operation All front panel keys except the LOCAL key are disabled SYSTem RWLock Places the ac source in remote mode during RS 232 operation All front panel keys including the LOCAL key are disabled RS 232 Data Format constant 11 bit data format one start bit seven data bits plus a parity bit even or odd parity or eight data bits without parity parity bit is 0 two stop bits You can sp
29. AM Calibrating and Entering AC rms Voltage Gain Values 22 23 24 25 Action Connect the DVM ac volts mode to the ac source using the ratio transformer shown in Figure B 1 Press Shift Calibration scroll to the CAL VOLT AC command and press Enter Press Shift Calibration scroll to the CAL LEV P1 command and press Enter to select the first calibration point Press Shift Calibration scroll to CAL DATA 0 00 and use the Entry keypad to enter the product of the transformer ratio times the ac voltage value displayed on the DVM Display CAL VOLT AC CAL LEV P1 CAL DATA 0 00 73 B Verification and Calibration 26 27 28 29 30 31 Press Shift Calibration scroll to the CAL LEV P1 command use to scroll to the P2 parameter and press Enter This selects the second calibration point Press Shift Calibration scroll to CAL DATA 0 00 and use the Entry keypad to enter the product of the transformer ratio times the ac voltage value displayed on the DVM Press Shift Calibration scroll to the CAL LEV P1 command use to scroll to the P3 parameter and press Enter Press Shift Calibration scroll to CAL DATA 0 00 and use the Entry keypad to enter the product of the transformer ratio times the ac voltage value displayed on the DVM Press Shift Calibration scroll to the CAL LEV P1 command use to scroll to the P4 parameter and press Enter Press Shift Calibration scroll to
30. AY 250 4 When you want to restore normal operation after the cause of the overcurrent PROT CLEAR condition has been removed scroll to the protection clear command and press Enter The OCP annunciator then will go off 5 Clearing Protection Conditions When the output Prot annunciator is on the output of the ac source has turned off due to one or more of the following conditions Annunciator Description Bit Number Bit Weight OV overvoltage protection has tripped 0 1 OCP rms overcurrent protection has tripped 1 2 SOA safe operating area has tripped 2 4 OT overtemperature protection has tripped 4 16 RI an external remote inhibit signal has occurred 9 512 Rail rail protection has tripped 11 2048 Action Display 1 You must first identify the cause of the protection shutdown and then eliminate its cause before you can continue operating the unit 2 To identify the problem press Shift Status CLS 3 Press W to obtain the Questionable Event command QUES EVEN 4 Press Enter to find out which bits have been set in the Event Register QUES EVEN 20 Note The value returned is the sum of all of the binary weights of the bits that have been set For example a value of 20 indicates that bit 2 bit weight 4 and bit 4 bit weight 16 have been set Refer to the previous table for the bits and bit weights that are assigned to the protection conditions Refer to the following table for information on eliminatin
31. CAL DATA 0 00 and use the Entry keypad to enter the product of the transformer ratio times the ac voltage value displayed on the DVM CAL LEV P2 CAL DATA 0 00 CAL LEV P3 CAL DATA 0 00 CAL LEV P4 CAL DATA 0 00 The ac source is now holding the new ac rms voltage calibration constants in RAM Calibrating the OVP Trip Point 32 33 Action Press Shift Calibration scroll to CAL VOLT PROT and press Enter Wait for the ac source to compute the OVP calibration constant The display returns to Meter mode when the OVP calculation is complete The ac source is now holding the new OVP calibration constants in RAM Calibrating and Entering rms Current Values 34 35 36 37 38 39 The ac source is now holding the new rms current calibration constants in RAM 74 Action Connect the DVM ac rms mode current shunt and load resistor as shown in figure B 1 with S1 closed Press Shift Calibration scroll to the CAL CURR AC command and press Enter Press Shift Calibration scroll to the CAL LEV P1 command and press Enter Press Shift Calibration scroll to the CAL DATA 0 00 command Calculate the rms current value DVM ac rms voltage shunt resistance and use the Entry keypad to enter the rms current Press Shift Calibration scroll to the CAL LEV P1 command use to scroll to the P2 parameter and press Enter Press Shift Calibration scroll to the CAL DATA 0 00 command Calculate the
32. CV should be on Display accesses the protection menu list Display shows the overvoltage protection trip voltage for your unit The overvoltage protection voltage is programmed in peak not rms volts Programs the OVP to 160 Vpeak the rms value of which is less than the previously set rms voltage Because the peak OVP voltage entered was less than the rms output voltage the OVP circuit tripped The output dropped to zero CV turned off and Prot turned on Programs the OVP to a peak value that is greater than the rms output voltage value Note You cannot clear an OVP trip until you have first removed the cause of the condition Executes the PROT CLEAR command restoring the output Prot turns off and CV turns on 33 3 Turn On Checkout Procedure Display Explanation 10 Press Shift and CURR LEV 5 Indicates the default output current limit setting Current 11 Press 5 Enter CURR LEV 5 Sets the current limit to 5 amperes The CC annunciator is on indicating that the unit is in current limit mode and the light bulbs are dimmer because the output voltage has dropped in its attempt to limit output current 12 Press Protect scrollto CURR PROT ON You have enabled the overcurrent protection the CURR PROT item circuit The circuit then tripped because of the and press to select output short The CC annunciator turns off and ON Then press Enter the OCP and Prot annuciators come on The output current is near z
33. EN 50082 1 1992 0 5 kV Signal Lines 1 kV Power Lines Supplementary Information The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC and carries the CE marking accordingly New Jersey January 1997 Location Date Bruce Krueger Quality Manager European Contact Your local Agilent Technologies Sales and Service Office or Agilent Technologies GmbH Department TRE Herrenberger Strasse 130 D 71034 Boeblingen FAX 49 703 1 14 3143 Acoustic Noise Information Herstellerbescheinigung Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenlaminformationsverordnung vom 18 Januar 1991 Schalldruckpegel Lp lt 70 dB A Am Arbeitsplatz Normaler Betrieb Nach EN 27779 Typpriifung Manufacturer s 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 Printing History The edition and current revision of this manual are indicated below Reprints of this manual containing minor corrections and updates may have the same printing date Revised editions are identified by a new printing date A revised edition incorporates all new or corrected material since the previous printing date Changes to the manual occurring between re
34. G 200 to 240 Vac unterminated 832 Agilent 6813B 4 mm wire size unterminated 833 Agilent 6812B 1 5 mm wire size 200 to 240 Vac unterminated 834 Agilent 6812B 10 AWG 100 to 120 Vac unterminated 841 Agilent 6812B 6813B Line cord with NEMA 6 20P 20A 250 V plug 842 Agilent 6813B Line cord with IEC 309 32A 220 V plug 844 Agilent 6813B Line cord with NEMA 6 30P 30A 250 V locking plug 845 Agilent 6812B Line cord with IEC 309 16 A 220 V plug 846 Agilent 6812B Line cord with NEMA L5 30P 30 A 120 V plug 847 Agilent 6812B Line cord with CEE 7 7 16 A 220 V plug 848 Agilent 6812B Line cord with BS 546 15 A 240 V plug Support rails Agilent p n 1494 0059 are required when rack mounting units with options 1CM and 1CP Agilent 6811B units are shipped with the correct line cord for the destination country 12 General Information 1 The following table lists some common user replaceable parts Table 1 2 Operator Replaceable Parts Agilent Part Number Power cord assembly see Options Rack mount kit see Options 4 terminal digital connector plug 1252 1488 Ac input safety cover with strain relief and bushing 5040 1676 Screw 3 ac input barrier block 6 32 x 5 16in N A Ac output safety cover 5040 1704 Line fuse for Agilent 6812B 30 AM 2110 0910 Line fuse for Agilent 6813B 25 AM 2110 0849 Line fuse for Agilent 6811B 20 AM 2110 0098 Screw 2 ac output safety cover m4 x 0 7in 0515
35. L DATA Dc_p2 L LEV P3 UT Enter DC voltage reading from DVM Dc_p3 T TABXY 25 PUT Ac CA T 3 LEAR SCREEN T TABXY 5 10 l T TABXY 18 SE EAR SCREEN T TABXY 18 5 CALIBRATING AC POGRAMMING and MEASUREMENT T TABXY 20 7 There are 4 points to be calibrated PUT Ac CA PUT Ac CA T 10 13 Point 3 entered L DATA Dc_p3 12 2 Set the 3458A to AC VOLTS L VOLT AC L LEV P1 UT Enter AC rms transformer ratio T TABXY 25 PUT Ac CA PUT Ac CA T 10 9 Point 1 entered L DATA Ac_pl L LEV P2 UT Enter AC rms transformer ratio T TABXY 25 PUT Ac CA PUT Ac CA T 10 11 Point 2 entered L DATA Ac_p2 L LEV P3 UT Enter AC rms transformer ratio T TABXY 25 PUT Ac CA PUT Ac CA TS 13 Point 3 entered L DATA Ac_p3 L LEV P4 UT Enter AC rms transformer ratio T TABXY 25 PUT Ac CA T10 EAR SCREEN T TABXY 15 10 CALIBRATING OVERVOLTAGE PROTECTION PUT Ac CA T TABXY 30 T 30 PUT Ac CA PUT Ac CA 15 Point 4 entered L DATA Ac_p4 L VOLT PROT 15 WAIT L SAVE L STATE OFF DVM DVM DVM DVM P Press CONT to begin AC PROGRAMMING and MEASUREMENT calibration reading Ac_pl reading Ac_p2 reading Ac_p3 reading Ac_p4 78 foe fo oO VUADOZVOVAIZOVHSOOVHZOOCVHZSOOVHSZOOVVAVU VVUQABOVHSZOOVHBZOOUWH EAR SCREEN T TABXY 15 5 l T TABXY 15 7 2 AA Turn off
36. Measurement lt reading gt A I MAG lt index gt current harmonic magnitude lt reading gt J PHASE lt index gt current harmonic phase lt reading gt V V MAG lt index gt voltage harmonic magnitude lt reading gt V PHASE lt index gt voltage harmonic phase lt reading gt N MAG lt index gt neutral current harmonic magnitude lt reading gt N PHASE lt index gt neutral current harmonic phase lt reading gt CURR THD current total harmonic distortion lt reading gt VOLT THD voltage total harmonic distortion Notes Displays the highest peak current since it was last cleared The value is cleared when you scroll into this selection or press or reading the returned measurement index a numeric value that represents the harmonic number from 0 to 50 char a character string parameter and scroll through the command list and scroll through the parameter list and specify the desired harmonic 41 4 Front Panel Operation Output Control Keys Output control keys control the output functions of the ac source 42 Press this key to access the voltage menu list Display VOLT lt value gt VOLT T lt value gt VOLT M lt char gt OFFSET lt value gt OFFSET T lt value gt OFFSET M lt char gt SLEW lt value gt SLEW T lt value gt SLEW M lt char gt OFF SLW lt value gt OFF SLW T lt value gt OFF SLW M lt char gt ALC lt char gt ALC DET lt char gt Command Function Set immediate rm
37. RCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 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 The above statements apply only to 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 Safety Summary 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 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 WARNING LETHAL VOLTAGES Ac sources can supply 425 V peak at their output DEATH on contact may result if the output terminals or circuits connected to the output are touched when power is applied GENERAL This product is a Safety Class 1 instrument provided with a protective earth terminal The protective features of this product may be impaired if it is used in
38. Remote with Lockout Press to access the system address menu This menu lets you configure the ac source s interface Address Menu entries are stored in non volatile memory Display Command Function ADDRESS lt value gt Sets the GPIB Address INTF lt char gt Selects an interface GPIB or RS232 BAUDRATE lt value gt Selects baud rate 300 600 1200 2400 4800 9600 PARITY lt char gt Message parity NONE EVEN ODD MARK SPACE LANG lt char gt Selects language SCPI or E9012 value a numeric value char a character string parameter Use and to scroll through the command list Use and to scroll through the parameter list Press to place the ac source into a previously stored state You can recall up to 16 0 through 15 previously stored states Press to display the system error codes stored in the SCPI error queue This action also clears the queue If there is no error in the queue 0 is displayed Press to store an existing ac source state in non volatile memory The parameters saved are listed under SAV in the ac source Programming Guide You can save up to 16 states 0 through 15 39 4 Front Panel Operation Function Keys Refer to the examples later in this chapter for more details on the use of these keys FUNCTION rY y p I Harmonic Current A Index a 7 y va aa Meter Voltage A NS ms Me A Output Phase WV index Cima Fa Fi yo Input req v AL i e ei NS
39. Tests which check all the specifications of the ac source are given in the applicable ac source Service Manual Because the output of the ac source must be enabled during verification or calibration proceed with caution since voltages and currents will be active at the output terminals Important Perform the verification procedures before calibrating your ac source If the ac source passes the verification procedures the unit is operating within its calibration limits and does not need to be recalibrated WARNING LETHAL VOLTAGES Ac sources can supply 424 V peak at their output DEATH on contact may result if the output terminals or circuits connected to the output are touched when power is applied These procedures must be performed by a qualified electronics technician or engineer trained on this equipment Equipment Required The equipment listed in the following table or the equivalent to this equipment is required for verification and calibration 65 B Verification and Calibration Table B 1 Equipment Required Characteristics Recommended Model Digital Voltmeter Resolution 10 nV 1 V Agilent 3458A Readout 8 5 digits Accuracy gt 20 ppm Current Monitor 0 01 Q 200 ppm 10 Watts Guildline 7320 0 01 Load Resistor 20 Q 10 A 1800 Watts min Impedance Resistor 1 Q 100 Watts min GPIB Controller Full GPIB capabilities HP Series 200 300 or equivalent The 4 terminal current shunt is used
40. User s Guide AC Power Solutions Agilent Models 6811B 6812B and 6813B For instruments with Serial Numbers Agilent 6811B US38390101 up Agilent 6812B US38390101 up Agilent 6813B US38390101 up CA ata f sa Paii jn Agilent Technologies Agilent Part No 5962 0829 Printed in U S A Microfiche No 5962 0830 December 1998 Update April 2000 Warranty Information CERTIFICATION 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 Bureau of Standards to the extent allowed by the Bureau s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Agilent Technologies hardware product is warranted against defects in material and workmanship for a period of three years from date of delivery Agilent Technologies software and firmware products which are designated by Agilent Technologies for use with a hardware product and when properly installed on that hardware product are warranted not to fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date of delivery During the warranty period Agilent Technologies will at its option either repair or replace products which prove to be defective Agilent Technologies does n
41. a manner not specified in the operation instructions Any LEDs used in this product are Class 1 LEDs as per IEC 825 1 ENVIRONMENTAL CONDITONS This instrument is intended for indoor use in an installation category II pollution degree 2 environment It is designed to operate at a maximum relative humidity of 95 and at altitudes of up to 2000 meters Refer to the specifications tables for the ac mains voltage requirements and ambient operating temperature range BEFORE APPLYING POWER Verify that the product is set to match the available line voltage the correct fuse is installed and all safety precautions are taken Note the instrument s external markings described under Safety Symbols GROUND THE INSTRUMENT 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 ATTENTION Un circuit de terre continu est essentiel en vue du fonctionnement s curitaire de l appareil Ne jamais mettre l appareil en marche lorsque le conducteur de mise la terre est d branch FUSES Only fuses with the required rated current voltage and spec
42. age On the Entry keypad press 1 2 0 Enter VOLT 120 This is the easiest way to enter an accurate value 2 On the Function keypad press Voltage On the Entry keypad press or to VOLT 127 increment or decrement the existing value This technique is useful when you are making minor changes to an existing value 3 Rotate the front panel Voltage knob to obtain 120 V This method is best when you 120V 60Hz want to enter a value without using the voltage menu Note You will not see the new voltage on the front panel meter unless the output is enabled To enable the output 4 On the Function keypad press Output On Off The Dis annunciator will go off 120V 60Hz indicating that the voltage is now applied to the output terminals 47 4 Front Panel Operation 2 Setting the Output Frequency When you turn on the ac source the default output frequency is a 60 Hz Assuming the voltage output from example 1 is in effect 120 Vrms sinewave change the frequency to 50 Hz as follows Action You can set the frequency in the same way that you set the voltage 1 On the Function keypad press Freq On the Entry keypad press 5 0 Enter 2 On the Function keypad press Freq On the Entry keypad press or to increment or decrement the existing value 3 Rotate the front panel Frequency knob to obtain 50 Hz To verify the output use the meter menu 4 The Meter menu is presently displaying the measured voltage and frequency of t
43. ages Under unusual operating conditions the front panel display may show OVLD This indicates that the output voltage or current is beyond the range of the meter readback circuit If the front panel display indicates a GPIB measurement is in progress Appendix C lists other error messages that may appear at runtime Line Fuse If the ac source appears dead with a blank display and the fan not running first check your power source to be certain line voltage is being supplied to the ac source If the power source is normal the ac source line fuse may be defective If the ac source has a defective fuse replace it only once If it fails again investigate the reason for the failure Proceed as follows WARNING Hazardous voltages can remain active inside the ac source even after it has been turned off Fuse replacement should be done only by a qualified electronics technician The line fuse is located inside the ac source To change it refer to Figure 3 2 and proceed as follows 1 Turn off the front panel power switch and unplug the line cord from the ac source 2 Remove the ac cover as follows a Remove the four screws securing the carrying straps and dustcover use a T25 Torx drive b Spread the bottom rear of the cover and pull it back to remove it 3 Observe the two LEDs on each side of the unit If either LED is ON there is still hazardous voltages present inside the ac source Wait until the LEDs are out befo
44. als but with a 40 increase in output voltage over the programmed limit The meter circuit cannot read back this increase in output voltage when the sense lead is disconnected Set the ALC command to EXT external to enable remote sensing The ALC command is located under the Voltage key as explained in Chapter 4 Set the ALC command to INT internal to disable remote sensing NOTE If you are using external relays to connect and disconnect the load and sense connections do NOT permit the sense connections to open when remote sensing is enabled First disable remote sensing then open the sense and load connections 01 fi COM COM h LOAD Figure 2 5 Remote Sense Connections 26 Installation 2 Remote Sensing and OVP Considerations In remote sense applications the voltage drop in the load leads subtracts from the available load voltage see Remote Sensing Capability in appendix A As the ac source increases its output to overcome this voltage drop the sum of the programmed voltage and the load lead drop may exceed the ac source s maximum voltage rating This may trip the OV protection circuit which senses the voltage at the output terminals not at the load When using remote sensing you must program the OVP trip voltage high enough to compensate for the voltage drop between the output terminals and the load NOTE If the load causes the peak current limit circu
45. an 38 Unr 38 AWG ratings 25 C cables 12 calibration 71 ac rms voltage gain 73 dc voltage gain 73 enable 72 equipment 65 error messages 76 menu 71 output impedance 75 OVP 74 password 76 program listing 76 rms current 74 75 saving 75 setup 66 voltage offset 72 capabilities 14 cleaning 21 conversion ac line 85 damage 21 dc offset 48 digital connections 27 digital connector 21 dimensions 22 Index entry keys 46 46 0 9 46 Clear Entry 46 E 46 Enter 46 error messages 34 error numbers 81 features 13 Fixed 50 FLT connections 27 frequency control 14 front panel 37 annuncuiators 38 controls and indicators 14 37 keys 38 function keys 40 4 40 4 Index 40 immediate action 40 Output On Off 40 Phase Select 40 Trigger 40 fuses 23 G general information 11 ground earth 12 guide programming 11 guide user s 11 GPIB 58 address 58 connections 28 H hazardous voltages 65 history 6 INH connections 27 input connections 23 power 12 inrush current capability 17 inspection 21 87 Index lethal voltages 65 line fuse replacing 35 line voltage conversion 85 List 50 52 load regulation 18 load voltage drops 25 location 22 low frequency operation lt 45 Hz 15 63 M manuals 11 21 measure ac only 48 ac dc 48 dc only 48 meter ac 48 ac dc 48 dc 48 Meter AC DC 38
46. an operate the unit at frequencies less that 45 Hz The operating characteristics of the ac source at autput frequencies below 45 Hz are documented in Table A 3 of Appendix A Vdc A fe 285W 6811B 575W 6812B _ 1350W 68138 r Vrms 115V 6811B 6812B we 135V 6813B RS K S A 375VA 6811B ee Se S00 750VA 68128 SS Se __ 1750VA 68138 2 5A 6811B x Id 4 5A 6812B c 4 IdC 40A 6813B o Na 0 67A 6811B 2 5A 6811B 115V 6811B 6812B S 1 35A 6812B 5A 6812B 135V 6813B gt L 3 17A 6813B 10A 6813B Irms 2 0 x gt N 1 25A 6811B 3 25A 6811B 2 5A 6812B 6 5A 6812B 5 8A 6813B 13A 6813B 424 V Vdc AC CHARACTERISTIC DC CHARACTERISTIC 45Hz 1kHz sinewave Figure 1 2 Steady state Output Characteristic in real time mode 15 1 General Information Peak Current Dynamic Power Capability The ac source can generate peak currents that exceed the rms current capability of the unit This not only applies when operating in ac mode but also when programming output pulses in dc mode Although the unit will generate peak output currents up to 40A Agilent 6811B 6812B or 80A Agilent 6813B the unit can only maintain this output for a limited time If the output of the unit exceeds the limit of the safe operating area SOA the unit will activate its internal protection mode and turn its output off This SOA limit is based on output voltage output current output du
47. ansient Voltage Modes The ac source voltage can be programmed in the following transient operating modes STEP causes the output to permanently change to its triggered value PULSE causes the output to change to its triggered value for a specific time as determined by the Pulse menu parameters LIST causes the output to sequence through a number of values as determined by points entered in the List menu FIXED disables transient operation for the selected function 50 Front Panel Operation 4 Step Transient The Voltage Menu lets you specify an alternate or triggered voltage level that the ac source will apply to the output when it receives a trigger Because the default transient voltage level is zero volts you must first enter a triggered voltage before you can trigger the ac source to change the output amplitude Refer to Chapter 4 of the Programming Guide for more information about programming triggers In the following example the voltage output is set to 120 Vrms and then stepped down to 102 Vrms Action Display 1 On the Function keypad press Output On Off to enable the output The Dis OV 60Hz annunciator will go off 2 Press Voltage to access the Voltage Menu On the Entry keypad press 1 2 0 Enter VOLT 120 3 Access the Voltage Menu again and press W to access the triggered voltage VOLT T 0 command 4 On the Entry kepad press 1 0 2 Enter VOLT T 102 5 Access the Voltage Menu again and press W to access the voltage mod
48. ation and Calibration B 10 20 AC Source calibration program Rev B 00 00 30 40 ASSIGN Ac TO 705 50 60 RINT TABXY 5 5 This program will calibrate the 6811B 12B 13B AC Power Solutions 70 RINT TABXY 5 7 Equipment requirements are Agilent3458A or equivalent DVM RINT TABXY RINT TABXY RINT TABXY RINT TABXY RINT TABXY 37 8 0 01 ohm lt 200ppm Current Shunt 37 9 20 ohm gt 1800 watt power resistor for all models 37 10 1 ohm gt 100 watt impedance resistor 37 11 30 1 lt 50ppm Ratio Transformer 3 13 Ratio Transformer is required to when calibrating to MIL STD 45662A If the 130 RINT TABXY 2 14 ratio transformer is not used the measurement uncertainty must be recalculated 140 150 ISP Press CONT to continue 160 AUSE 170 LEAR SCREEN 180 RINT TABXY 15 5 1 Turn the AC Source off 190 RINT TABXY 15 7 2 Disconnect all loads RINT TABXY 15 9 3 Connect the 3458A to the rear terminal block 210 RINT TABXY 15 11 4 Set the 3458A to DC VOLTS 220 RINT TABXY 15 13 5 Turn on the AC Source 230 240 SP Press CONT to begin DC OFSET and DC GAIN calibration 250 AUSE 260 LEAR SCREEN 270 R 280 RINT TABXY 20 7 There are 4 points to be calibrated 290 UTPUT Ac CAL STATE ON 300 TPUT Ac CAL VOLT OFFS T TABXY 25 5 CALIBRATING VOLTAGE OFFSET w o VPUABOVHSOOVHSOOVHZSOOVHZOOOVVONOU VUVNVVAVOU VUVUVU Ue UTPUT Ac CAL LEV P1 320 AIT 10 3
49. ative resistance loads the rms current limit circuit causes the output voltage to go to zero Voltage Regulation Real Time Regulation The default method of output regulation used by the ac source is real time voltage regulation Real time voltage regulation tries to provide the actual programmed waveform at the output of the ac source It offers the best overall programming response and fastest settling times It does not have any limitations for waveforms and transients with frequency content below 45 Hz RMS Regulation Rms voltage regulation assists real time regulation to level out or stabilize the rms value of the ac component of the output voltage Use rms voltage regulation in the following situations If you experience load regulation effects with heavy loads If you experience frequency regulation problems with heavy loads and you require flatter programming accuracy at higher frequencies In conjunction with programmable output impedance if you wish to maintain the rms level of output voltage as the source impedance is increases Refer to Output Impedance for more information The command to specify voltage regulation is VOLT ALC DET RTIM RMS NOTE Do not use rms voltage regulation when operating at frequencies less than 45 Hz Output Impedance You can program the real and or reactive resistive and or inductive part of the output impedance of the ac source Inductive output impedances can be programmed in
50. ble 30 pinouts 29 safety class 12 safety summary 3 safety warning 12 saving operating states 58 self test 31 selftest errors 34 sense connections 25 service guide 12 shift annunciator 32 shift key 32 Slew rates programming 55 SOA 49 SOA limit 16 specifications 59 Step 50 supplemental characteristics 61 SYSTem LOCal 29 REMote 29 RWLock 29 system errors 81 system keys 39 Address 39 Error 39 Interface 39 Local 39 RCL 39 Save 39 Shift 39 transient voltage fixed 50 list 50 52 pulse 51 step 50 transient voltage mode 50 trigger connections 27 Trigger delays 53 trigger IN 27 trigger OUT 27 trigger list keys List 45 Trigger Control 45 turn on checkout 31 67 V verification 32 ac measurement accuracy 67 ac voltage programming 67 dc measurement accuracy 68 dc voltage programming 68 Index equipment 65 rms current accuracy 68 setup 66 test record 69 verification tests 31 voltage control 14 voltage regulation real time 18 rms 18 warranty 2 Waveform generation 55 wire current ratings 25 wiring considerations 25 89 Agilent Sales and Support Offices For more information about Agilent Technologies test and measurement products applications services and for a current sales office listing visit our web site http www agilent com find tmdir You can also contact one of the following centers and ask for a test and mea
51. e front panel control Set the ac source GPIB address Set the RS 232 interface communication baud rate and parity bit Display SCPI error codes and clear the error queue Save and recall up to 4 instrument operating configurations Function access command menus that let you Program output voltage current limit frequency and output waveforms Turn the ouput on and off Select metering functions Send immediate triggers from the front panel Program transient output functions Set and clear protection functions Select output phases Select the coupling for output and meter functions Monitor instrument status Entry keys let you Enter programming values Increment or decrement programming values Calibrate the ac source Front Panel Operation 4 System Keys Refer to the examples later in this chapter for more details on the use of these keys 1 SYSTEM Local 3 J Error fe Address Save y Recall Figure 4 2 System Keys This is the blue unlabeled key which is also shown as Brit Jin this guide Pressing this key accesses the alternate or shifted function of a key such as ERROR Release the key after you press it The Shift annunciator is lit indicating that the shifted keys are active Press to change the ac source s selected interface from remote operation to local front panel operation Pressing the key will have no effect if the interface state is already Local Local with Lockout or
52. e command It VOLT M STEP should be in the default FIXED mode An ac source function in the FIXED mode does not respond to triggers On the Entry keypad press or to scroll through the mode parameters When you have STEP press Enter 6 Press Trigger Control and Enter This initiates or enables one immediate trigger INIT IMMED action 7 Press Shift Trigger This sends the ac source an immediate trigger signal to change 102 V 60 HZ the output voltage The triggered voltage value now becomes the VOLT value Pulse Transient In the following example the output is four 83 3 millisecond 120 Vrms pulses at 60 Hz The figure shows the trigger pulse count pulse period and duty cycle NOTE From the Output Menu execute the RST command to reset the ac source This is necessary because any previously programmed functions remain in effect until cleared Trigger count 4 120Vrms 102Vrms Figure 4 5 Pulse Transients 51 4 Front Panel Operation Action Press Voltage to access the Voltage Menu On the Entry keypad press 10 2 Enter Press V to access the triggered voltage command On the Entry keypad press 1 2 0 Enter Access the Voltage Menu again and press W to access the voltage mode command On the Entry keypad press or to scroll through the mode parameters to obtain PULSE and press Enter Press Pulse to access the Pulse Menu From the Entry keypad press 0833 Enter to enter a pulse widt
53. e holdoff lines as necessary If your bus controller does not use hardware handshaking tie the DSR input to the ac source to a signal that is always true This implies that your bus controller must always be ready to accept data You may want to set the baud rate to either 2400 or 4800 baud to ensure that this is true bus controller ac source TxD 3 bee TxD 3 RxD 2 fe RxD 2 DTR 4 DTR 4 DSR 6 i DSR 6 Ground 5 Ground 5 Figure 2 7 Null Modem Interface Lines Response Data Terminator All RS 232 response data sent by the ac source is terminated by the ASCII character pair lt carriage return gt lt newline gt This differs from GPIB response data which is terminated by the single character lt newline gt 30 Turn On Checkout Introduction Successful tests in this chapter provide a high degree of confidence that the ac source is operating properly For verification tests see appendix B Complete performance tests are given in the Service Guide NOTE This chapter provides a preliminary introduction to the ac source front panel See Chapter 4 for more details Preliminary Checkout WARNING LETHAL VOLTAGES Ac sources can supply 425 V peak at their output DEATH on contact may result if the output terminals or circuits connected to the output are touched when power is applied 1 If you have not already done so connect the power cord to the ac source and plug it i
54. e immediate slew command On the Entry keypad enter a value that equals infinity Access the Voltage menu and press W until you access the triggered slew command On the Entry keypad enter a value such as 5 0 Enter which sets the triggered slew rate to 50 volts second Then press Trigger Control and Enter followed by Shift Trigger When the voltage slew mode is set to LIST the slew rates are set by the values in the voltage slew list Refer to the List Transient example for more information on how to program lists You must program the voltage values and dwell times as explaied in that example You must also program a slew rate for each point in the list even if it is 9 9 E37 Display VOLT M FIXED SLEW 50 VOLT 120 VOLT T 150 SLEW M_ STEP SLEW 9 9 E37 SLEW T 50 INIT IMMED VOLT 120 VOLT T 150 SLEW M PULSE COUNT 2 DCYCLE 33 PER 0166 SLEW 9 9 E37 SLEW T 50 INIT IMMED When specifying a dwell time you must take the slew time into consideration If the dwell time at any given list point is less than the slew time at the same point the voltage will never reach its programmed level before the next list point becomes active 9 Measuring Peak Inrush Current Front Panel Operation 4 Peak inrush current is a non repetitive measurement in the sense that peak inrush current occurs only when the unit under test is first turned on In order to repeat the measurement you must turn the unit off and wa
55. e mounted in a standard 19 inch rack panel or cabinet Rack mounting kits are available as Option 1CM or 1CP Installation instructions are included with each rack mounting kit Agilent ac sources also require instrument support rails in addition to the rack mount kit Support rails are normally ordered with the cabinet and are not included with the rack mounting kits REAR TOP f 425 5mm 16 75 A UJ 12 7mm 0 5 574 7mm lt 22 6 es t az C 132 6mm 5 25 50 8mm lt 2 0 Figure 2 1 Outline Diagram SIDE 22 Installation 2 Input Connections Input Source and Line Fuse You can operate your ac source from a single phase ac power source as indicated on the rear panel Line Rating label See ac Input Voltage Range in Table A 2 of Appendix A for details NOTE The power ac source must be on a dedicated line with no other devices consuming current from it The line fuse is located inside the ac source Refer to In case of Trouble in Chapter 3 for instructions on fuse replacement Installing the Power Cord The power cord supplied with the ac source may or may not include a power plug at one end of the cord Figure 2 2 shows the various power plugs Terminating connections are attached to the other end of the cord Option 831 832 833 834 8 Ring Terminals Option 841 Option 842 Option 844 Option 845 Option 846 Option 8
56. e quote 158 String data not allowed 113 Undefined header operation not allowed for this device 160 Block data error 81 C Error Messages 161 Invalid block data e g END received before length satisfied 350 l b NYA UN fF WN KY CO 11 31 168 Block data not allowed 170 Expression error 171 Invalid expression 178 Expression data not allowed Execution Errors 200 through 299 sets Standard Event Status Register bit 4 200 Execution error generic 221 Settings conflict check current device state 222 Data out of range e g too large for this device 223 Too much data out of memory block string or expression too long 224 Illegal parameter value device specific 225 Out of memory 270 Macro error 272 Macro execution error 273 Illegal macro label 276 Macro recursion error 277 Macro redefinition not allowed System Errors 300 through 399 sets Standard Event Status Register bit 3 310 System error generic Too many errors errors beyond 9 lost due to queue overflow Query Errors 400 through 499 sets Standard Event Status Register bit 2 Query error generic Query INTERRUPTED query followed by DAB or GET before response complete Query UNTERMINATED addressed to talk incomplete programming message received Query DEADLOCKED too many queries in command
57. e temperature Voltage Drops The load wires must also be large enough to avoid excessive voltage drops due to the impedance of the wires In general if the wires are heavy enough to carry the maximum short circuit current without overheating excessive voltage drops will not be a problem Refer to Table 2 1 to calculate the voltage drop for some commonly used AWG copper wire If load regulation becomes a problem refer to the section Remote Sense Connections Remote Sense Connections Under normal operation the ac source senses the output voltage at the output terminals on the back of the unit External sense terminals are available on the back of the unit that allow the output voltages to be sensed at the load compensating for impedance losses in the load wiring As shown in the following figure 25 2 Installation Connect the phase 1 1 sense terminals to the side of the load that connects to the corresponding output terminal Connect the Neutral COM sense terminal connector to the neutral side of the load Twist and shield all signal wires to and from the sense connectors The sense leads are part of the ac source s feedback path and must be kept at a low resistance in order to maintain optimal performance Connect the sense leads carefully so that they do not become open circuited CAUTION Ifthe sense leads are left unconnected or become open during operation the ac source will regulate at the output termin
58. e to respond to the test commands Perform the following tests for operation verification in the order indicated 1 Turn On Checkout 2 Voltage Programming and Measurement Accuracy 3 Current Measurement Accuracy Turn On Checkout Procedure Perform the Turn On Checkout as directed in Chapter 3 NOTE The ac source must pass turn on selftest before you can proceed with the verification tests AC Voltage Programming and Measurement Accuracy This test verifies the voltage programming GPIB measurement and front panel meter functions Values read back over the GPIB should be the same as those displayed on the front panel If more than one meter or if a meter and an oscilloscope are used connect each to the sense terminals by separate leads to avoid mutual coupling effects Action Normal Result 1 Make sure the ac source is turned off Connect the DVM and ratio transformer as shown in the test setup in Figure B 1 2 Turn on the ac source with no load In the Output menu execute CV annunciator on the RST command to reset the unit Enable the output by Output current near 0 pressing Output On Off Program the output voltage as follows VOLT 300 FREQ 45 SHAPE SIN CURR 1 3 Record voltage readings at the DVM and on the front panel Readings within specified High display range limits 300 V 45 Hz 4 Program FREQ 400 5 Record voltage readings at the DVM and on the front panel Readings within specified High display
59. ecify one of the following baud rates 300 600 1200 2400 4800 9600 NOTE The ac source always uses one start bit and two stop bits regardless of the baud rate The number of start and stop bits is not programmable RS 232 Connector The RS 232 connector is a DB 9 male connector You can connect the ac source to any computer or terminal with a properly configured DB 25 connector You can use a standard Agilent 24542G or 24542H interface cable Table 2 2 RS 232 Connector 12345 Pin Input Output Description a 1 Output Reserved for service use J L 2 Input Receive Data RxD sa C m N 3 Output Transmit Data TxD ed Oi OE A 4 Output Data Terminal Ready DTR Q J 5 Common Signal ground REFE i 6 Input Data Set Ready DSR 7 no connection 8 no connection 9 Output Reserved for service use 29 2 Installation Hardware Handshake The RS 232 interface uses the DTR data terminal ready line as a holdoff signal to the bus controller When DTR is true the bus controller may send data to the ac source When DTR goes false the bus controller must stop sending data within 10 characters and must not send any more data until DTR goes true again The ac source sets DTR false under two conditions 1 When the input buffer is full approximately 100 characters have been received it will set DTR false When enough characters have been removed to make space in the input buffer DTR will be set to true unless condi
60. ee phase transitions Step and pulse output transients for generating surge sag dropout and other line disturbance simulations Nonvolatile list programming for generating complex output transients or test sequences Nonvolatile state and waveform storage and recall Extensive measurement capability Ac rms dc ac dc voltage and current and peak current Real reactive and apparent power Harmonic analysis of voltage and current waveforms gives amplitude phase and total harmonic distortion results up to the 50th harmonic Triggered acquisition of digitized voltage and current with extensive post acquisition calculations All measurements made with 16 bit resolution Trigger In and Trigger Out for synchronizing transient events or measurements with external signals Front panel control with 14 character vacuum flourescent display keypad and rotary pulse generators for voltage and frequency settings Built in GPIB and RS 232 interface programming with SCPI command language Over voltage over power over current over temperature and RI DFI protection features Built in output and sense disconnect relays Output terminals floating with respect to chassis ground Extensive selftest status reporting and software calibration Front Panel Remote Operation The front panel has both rotary RPG and keypad controls for setting the output voltage and frequency The panel display provides digital readouts of a number of output measurements Annunc
61. el Calibration WARNING LETHAL VOLTAGES Ac sources can supply 424 V peak at their output DEATH on contact may result if the output terminals or circuits connected to the output are touched when power is applied These procedures must be performed by a qualified electronics technician or engineer trained on this equipment The following procedures assume you understand how to operate front panel keys see Chapter 4 Enable Calibration Mode Action Display 1 Reset the unit by selecting Output scrolling to the RST command and RST pressing Enter 2 To begin calibration press Shift Cal scroll to CAL ON and press Enter CAL ON 0 0 3 Enter the calibration password from Entry keypad and press Enter If the password is correct the Cal annunciator will come on If CAL DENIED appears then an internal switch has been set to prevent the CAL DENIED calibration from being changed see the Service Manual lf the password is incorrect an error occurs If the active password is lost the OUT OF RANGE calibration function can be recovered by setting an internal switch that defeats password protection see the Service Manual Calibrating and Entering Voltage Offset Values Connect the negative terminal of the DVM to the COM output terminal Note that some calibration points are negative be sure to enter the CAL DATA as negative values when required Action Display 4 Connect the DVM dc volts mode directly to the ac source Do n
62. ero 13 Press Output On Off 0 5 V 60 Hz The output is off and the Dis annunciator turns on 14 Press Protect scroll to CURR PROT OFF You have disabled the overcurrent protection the CURR PROT item circuit The Prot annunciator turns off press to select OFF then press Enter 15 Turn the unit off The next time the unit turns on it will be restored to the RST or factory default state In Case of Trouble Error Messages Ac source failure may occur during power on selftest or during operation In either case the display may show an error message that indicates the reason for the failure Selftest Errors Pressing the Shift and Error keys will show the error number Selftest error messages appear as ERROR lt n gt where n is a number listed in the following table If this occurs turn the power off and then back on to see if the error persists If the error message persists the ac source requires service Table 3 1 Power On Selftest Errors Error No Failed Test Error 0 No error Error 1 Non volatile RAM RDO section checksum failed Error 2 Non volatile RAM CONFIG section checksum failed Error 3 Non volatile RAM CAL section checksum failed Error 4 Non volatile RAM WAVEFORM section checksum failed Error 5 Non volatile RAM STATE section checksum failed Error 6 Non volatile RAM LIST section checksum failed Error 10 RAM selftest Error 11 to 18 DAC selftest 1 to 8 34 Turn On Checkout 3 Runtime Error Mess
63. f the terminal block a la XQ 300 VAC MAX TO L 01 PHASE 1 OUTPUT CONNECTION COM PHASE RETURN CONNECTION a GROUND CONNECTION Figure 2 4 Output Connections 24 Installation 2 Wire Considerations NOTE To minimize the possibility of instability on the output keep load leads as short as possible bundle or twist the leads tightly together to minimize inductance Current Ratings Fire Hazard To satisfy safety requirements load wires must be large enough not to overheat when carrying the maximum short circuit current of the ac source If there is more than one load then any pair of load wires must be capable of safely carrying the full rated current of the ac source Table 2 1 lists the characteristics of AWG American Wire Gage copper wire Table 2 1 Ampacity and Resistance of Stranded Copper Conductors AWG No Ampacity Resistance AWG No Ampacity Resistance Q m Q m 14 25 0 0103 6 80 0 0016 12 30 0 0065 4 105 0 0010 10 40 0 0041 2 140 0 00064 8 60 0 0025 1 0 195 0 00040 NOTES 1 Ampacity is based on 30 C ambient temperature with conductor rated at 60 C For ambient temperature other than 30 C multiply the above ampacities by the following constants Temp C Constant Temp C Temp C 21 25 1 08 41 45 0 71 26 30 1 00 46 50 0 58 31 35 0 91 51 55 0 41 36 40 0 82 2 Resistance is nominal at 75 C wir
64. g any password change the password to 0 zero NOTE If you want the calibration function to operate without requiring any password change the password to 0 zero Calibration Error Messages Errors that can occur during calibration are shown in the following table Table B 5 GPIB Calibration Error Messages Meaning 401 CAL switch prevents calibration This is a hardware disable see the ac source Service Manual 402 CAL password is incorrect 403 CAL not enabled 404 Computed readback cal constants are incorrect 405 Computed programming cal constants are incorrect 406 Incorrect sequence of calibration commands Calibration Over the GPIB You can calibrate the ac source by using SCPI commands within your controller programming statements Be sure you are familiar with calibration from the front panel before you calibrate from a controller Each front panel calibration command has a corresponding SCPI command The SCPI calibration commands are explained in Chapter 3 of the ac source Programming Guide Calibration error messages that can occur during GPIB calibration are shown in table B 3 Agilent Calibration Program Listing Figure B 2 Sheets 1 through 3 lists the calibration program This program can be run on any controller operating under Agilent BASIC The assumed power supply address is 705 and calibration password is 0 If required change these parameters in the appropriate statements 76 Verific
65. g the couse of the protection condition Refer to Chapter 4 in the ac source Programming Guide for a complete discussion of the status system 49 4 Front Panel Operation Condition Action OV Condition Usually overvoltage conditions are caused by an external source forcing voltage into the output of the ac source Remove this external source to eliminate the overvoltage You can also program the overvoltage level to a higher value or turn the overvoltage protection off In other cases the output voltage may have exceeded the user programmed overvoltage level In this case the unit may have inadvertently been programmed to a voltage that exceeded the programmed overvoltage level The VOLTage PROTection command sets the overvoltage protection level Note The overvoltage protection level is programmed in peak not rms volts OCP Condition If the CURRent PROTection STATe command has been programmed to to disable the output when rms current limit is activated the unit will shut down The rms current limit threshold is set by the CURRent command In this case you must check to see why the load is drawing more current than the limit that has been programmed by the CURRent command SOA Condition Protection circuits in the ac source let the load draw peak currents for short periods of time that exceed the continuous capability of the unit This allows loads that require large inrush currents to turn on The ac source will shut down if a c
66. gered frequency slew rate in volts second Select the frequency slew mode FIXED STEP PULSE or LIST char a character string parameter and scroll through the command list and scroll through the parameter list Front Panel Operation 4 Press this key to access the phase menu list Display PHASE lt value gt PHASE T lt value gt PHASE M lt char gt Command Function Set immediate output phase Set triggered output phase Select the phase mode FIXED STEP PULSE or LIST Press this key to access the shape menu list Display SHAPE lt char gt SHAPE T lt char gt SHAPE M lt char gt CLIP lt value gt Command Function Select the immediate output wave shape SINE SQUARE or CSINE CSIN clipped sine wave Select the triggered output wave shape SINE SQUARE or CSINE CSIN clipped sine wave Select the shape mode FIXED STEP PULSE or LIST Set the clipping level of the CSIN wave shape This specifies the point where clipping starts as a percentage of the peak amplitude or percentage of THD Press this key to access the pulse menu list Display WIDTH lt value gt COUNT lt value gt DCYCLE lt value gt PER lt value gt HOLD lt char gt Command Function Set the pulse width Set the number of output pulses Set the pulse duty cycle as a percentage of the pulse period Set the pulse period Set the parameter that will be held constant as the other parameters change WIDTH or DCYCLE Press
67. ges De offset voltage slew rate list List of output voltage phase angles List of output waveform shapes SINE SQUARE or CSIN CSIN clipped sine wave Response of list to triggers ONCE or AUTO List of Trigger Out pulses O no pulse 1 pulse List of ac output voltages List of output voltage slew rates User defined waveshapes will also appear in this list when created value a numeric value char a character string parameter index a numeric value that represents a list point from 0 to 99 aj and Y_ scroll through the command list it and __ scroll through the parameter list and scroll through the desired list points EOL is displayed when the end of the list is reached When a value is edited pressing automatically advances to the next list point Pressing Clear Entry truncates or clears the list at the presently displayed list point 45 4 Front Panel Operation Entry Keys Refer to the examples later in this chapter for more details on the use of these keys ARAOe E gE 3 G O O 2 s 2 S m 5 lt A 6 A ENTRY 7 Sl Calibration x E 7 e 9 f i A 4 Na J po rad gt fo e la 4 5 6 4 _ XQ of Vea a is gt a 4 Enter 1 2 3 P Ss A A E a Clear Entry ra Sy 7 x fe N 0 X E Ke d z Figure 4 4 Entry Keys These keys let you scroll through choices in a parameter list that apply to a spec
68. h of 83 3 milliseconds Access the Pulse Menu and press W to access the duty cycle command From the Entry keypad press 3 3 Enter to change the duty cycle to 33 Access the Pulse Menu and press W to access the pulse count On the Entry keypad press 4 and Enter Press Trigger Control and Enter to initiate the transient trigger sequence Press Shift Trigger This sends the ac source an immediate trigger signal to generate the four output pulses Note The ac source output returns to 102 V at the completion of the output pulses List Transient Display VOLT 102 VOLT 120 VOLT M PULSE WIDTH 0833 DCYCLE 33 COUNT 4 INIT IMMED 102 V 60 HZ Lists are the most flexible means of generating multiple or synchronized transient outputs The following figure shows a voltage output generated from a list The output shown represents three different ac voltage pulses 160 volts for 33 milliseconds 120 volts for 83 milliseconds and 80 volts for 150 milliseconds separated by 67 millisecond 0 volt intervals The list specifies the pulses as three voltage points point 0 2 and 4 each with its corresponding dwell point The intervals are three zero voltage points point 1 3 and 5 of equal intervals The count parameter causes the list to execute twice when started by a single trigger NOTE From the Output Menu execute the RST command to reset the ac source This is necessary because any previously programmed fu
69. he selected output phase Press 4 and W to scroll through all of the measurement functions in the Meter Menu 3 Setting the DC Offset NOTE Display FREQ 50 FREQ 50 FREQ 50 120V 50Hz Because the maximum voltage that the ac source can output is limited to 425 V peak you cannot program a dc offset that will cause a previously programmed ac voltage to exceed the 425 V peak limit aCpeak Offset lt 425 V The dc output capability of the ac source lets you independently control the dc and ac components of the output voltage Program a dc offset of 100 V as follows Action 1 On the Function keypad press Voltage and then press until you access the OFFSET command 2 On the Entry keypad press 1 0 0 Enter 3 On the Function keypad press Shift Output to access the output coupling command Note When the output coupling is set to ac the ac source regulates the dc output voltage to 0 regardless of any programmed voltage offset 4 Press and Enter to change the output coupling to DC 5 The ac source output now combines the previously programmed ac rms voltage and the dc offset voltage This is indicated by the OUTPUT AC DC annunciator The front panel meter is measuring a 120 Vrms sinewave offset by 100 Vdc This is indicated by the METER AC DC annunciator To measure just the ac or just the dc portion of the output 6 On the Function keypad press Input to access the metering functions 7 Press u
70. iators display the operating status of the ac source System keys let you perform system functions such as setting the GPIB address and recalling operating states Front panel Function keys access the ac source function menus Front panel Entry keys let you select and enter parameter values Refer to Chapter 4 for a complete description of the front panel controls 14 General Information 1 Remotely programming is accomplished from either the GPIB bus or from an RS 232 serial port GPIB and RS 232 programming uses SCPI commands Standard Commands for Programmable Instruments that make the ac source programs compatible with those of other instruments AC source status registers permit remote monitoring of a wide variety of ac source operating conditions NOTE Refer to the ac source Programming Guide for further information about remotely programming the ac source Steady state Output Characteristic The ac source s steady state output characteristic is shown in the following figure Steady state characteristics are defined as those output ratings that will be maintained by the ac source for an indefinite time The section Peak Current Capability describes the dynamic output capability of the unit The figure shows both the ac and the dc characteristics With programmable output coupling the ac source can supply dc as well as ac output voltages Ac source operation is specified from 45 to 1000 Hz see Appendix A However you c
71. ific command Parameter lists are circular you can return to the starting position by continuously pressing either key If the command has a numeric range these keys increment or decrement the existing value o through 2 are used for entering numeric values is the decimal point For example to enter 33 6 press 33 6 Enter The backspace key deletes the last digit entered from the keypad This key lets you correct one or more wrong digits before they are entered This key executes the entered value or parameter of the presently accessed command Until you press this key the parameters you enter with the other Entry keys are displayed but not entered into the ac source Before pressing you can change or abort anything previously entered into the display After Enter is pressed the ac source returns to Meter mode in most cases In Harmonic or List mode the ac sourse displays the next point in the list This key specifies an exponential power of 10 For example the the value for 100s can be entered as either 0001 oras1E 4 This key is the minus sign This key aborts a keypad entry by clearing the value This key is convenient for correcting a wrong value or aborting a value entry The display then returns to the previously set function When editing a list pressing clear Entry truncates or clears the list at the presently displayed list point This key accesses the calibration menu Refer to Appendix B to calibrate your
72. ified type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard 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 Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made only by qualified service personnel Instruments that appear damaged or defective should be made inoperative and secured against unintended operation until they can be repaired by qualified service personnel 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 Used for measurement and control circuits designed to be operated with one terminal at earth potential Terminal for Neutral conductor on permanently installed equipment Terminal for Line conductor on permanently installed equipment On supply Off supply Standby supply Units with this symbol are not completely disconnected from ac mains when this switch is off To completely disconnect the unit from ac mains either disconnect the power cord or have a qualified electrician install an external switch In position of a bi stable push control Out
73. it for any input filter capacitors to discharge completely This example shows you how you can measure the peak inrush current using the front panel meter The voltage is set to 120 V rms and the output is triggered at an output phase of 75 which optimizes the conditions under which inrush current is applied to the unit under test 10 11 NOTE Action Set the immediate voltage to 0 Press Voltage then press 0 and Enter Set the triggered voltage to 120 Vrms In the Voltage menu press Y to access the triggered voltage command Then press 1 2 0 Enter Set the voltage mode to step In the Voltage menu press Y to access the mode command Press to scroll to STEP and press Enter Make sure the triggered voltage slew rate is set to the fastest possible speed In the Voltage menu access the triggered slew command If necessary reset the slew rate to a faster speed Make sure the peak current and rms current limits are set to high values In the Current menu access the rms current limit and then the peak current limit commands If necessary reset the rms current and the peak current limits to higher values Agilent 6811B units have an rms current limit of 3 25 A Agilent 6813B units have an rms current limit of 13 A and a peak current limit of 80 A Synchronize the trigger source with a reference phase angle In the Trigger Control menu press W to access the sync source command Press to obtain PHASE and press Enter Set
74. it to become active voltage transitions on the output may cause nuisance tripping of the OVP circuit Trigger Connections The BNC trigger connectors on the rear panel let you apply trigger signals to the ac source as well as generate trigger signals from the ac source The electrical characteristics of the trigger connectors are described in appendix A More information on programming external triggers is found in Chapter 4 of the ac source Programming Guide Trigger IN Allows negative going external trigger signals to trigger the ac source Trigger OUT Generates a negative going pulse when the selected transient output has occurred Digital Connections This connector which is on the rear panel is for connecting the fault and the inhibit signals The fault FLT signal is also referred to as the DFI signal in the front panel and SCPI commands The inhibit INH signal is also referred to as the RI signal in the front panel and SCPI commands The connector accepts wires sizes from AWG 22 to AWG 12 Disconnect the mating plug to make your wire connections The electrical characteristics of the digital connectors are described in appendix A More information on programming the digital connectors is found in Chapter 4 of the ac source Programming Guide NOTE It is good engineering practice to twist and shield all signal wires to and from the digital connectors The following examples show how you can connect the FLT INH circuits of
75. l to the CAL IMP command and press CAL IMP Enter 48 Wait for the ac source to compute the output impedance calibration constant The display returns to Meter mode when the calculation is complete The ac source is now holding the new output impedance calibration constants in RAM Saving the Calibration Constants CAUTION Storing calibration constants overwrites the existing ones in non volatile memory If you are not sure you want to permanently store the new constants omit this step The ac source calibration will then remain unchanged Action Display 49 Press Shift Calibration scroll to CAL SAVE and press Enter CAL SAVE 50 Press Shift Calibration select CAL OFF and press Enter to exit CAL OFF Calibration mode RST and RCL will also set the calibration state to OFF 75 B Verification and Calibration Changing the Calibration Password The factory default password is 0 You can change the password when the ac source is in calibration mode which requires you to enter the existing password Proceed as follows Action Display 1 Begin by pressing Shift Cal and scrolling to the CAL ON command CAL ON 0 0 Enter the existing password from Entry keypad and press Enter Press Shift Cal and scroll to the CAL PASS command CAL PASS 0 ey oh Enter the new password from the keypad You can use any number with up to six digits and an optional decimal point If you want the calibration function to operate without requirin
76. lent 6811B equivalent dc voltage when current is flowing 6813B Agilent 6812B 20 A 10A gt 100 ms gt 100 ms gt 100 ms gt 100 ms gt 100ms gt 100 ms 30 A 15A gt 100 ms 100 ms 30 ms 24 ms 19 ms 15 ms 40 A 20 A 12 ms 9 2 ms 8 4 ms 7 6 ms 6 8 ms 5 9 ms SOA 25A 5 6 ms 5 1 ms 4 7 ms 4 4 ms 4 ms 3 5 ms 60 A 30 A 3 7 ms 3 4 ms 3 1 ms 2 9 ms 2 6 ms 2 3 ms TOA 35 A 2 6 ms 2 4 ms 2 2 ms 2 1 ms 1 9 ms 1 7 ms 80 A 2 ms Based on 25C ambient temperature with heatsink temperature less than 50C Peak Inrush Example The following table gives the recommended initial Ipeak settings when the ac source output is a 127 Vac or 254 Vac 60 Hz sine wave as a function of load capacitance The load on the output is a full wave bridge along with the indicated capacitor The load resistance across the capacitor is infinite The recommended Ipeak Will change as a function of changes in input as follows 16 General Information 1 as voltage increases the Ipeak setting needs to be decreased as frequency increases the Ipeak setting can be increased as load resistance decreases the Ipeak setting needs to be decreased Note that the purpose of programming the Ipeak current is to prevent the unit from activating its internal protection mode as a result of exceeding the SOA limits and turning the output off These initial settings may have to be reduced if the SOA circuit trips when the output is turned on Sometimes trial a
77. mation a Quick Reference Card designed as a memory jogger for the experienced user You will find information on the following tasks in these guides Refer to the table of contents of each guide for a complete list of the topics Location Chapter 1 this guide Appendix B this guide Chapter 4 this guide Chapter 4 this guide Chapter 2 this guide Appendix A this guide Appendix D this guide Chapter 1 this guide Topic Accessories and Options Calibrating the ac source Front panel keys Front panel programming examples Line voltage connections Line voltage ratings Line voltage conversion Operator replaceable parts Operator troubleshooting Chapter 3 this guide Operating characteristics Appendix A this guide Performance specifications Appendix A this guide Quick operating checkout Chapter 3 this guide Rack mounting Chapter 2 this guide RS 232 operation Chapter 2 this guide SCPI programming examples Chapter 3 Programming Guide SCPI programming commands Chapter 4 Programming Guide Turn on checkout Chapter 3 this guide Wiring discrete fault indicator DFD Chapter 2 this guide GPIB controller Chapter 2 this guide load or loads Chapter 2 this guide voltage sensing local and remote Chapter 2 this guide remote inhibit RD Chapter 2 this guide 11 1 General Information Earlier AC Source Models With the excepti
78. mple uses the immediate slew rate First access the Voltage menu and press W until you access the mode command On the Entry keypad press to obtain FIXED Press Enter Access the voltage menu and press w until you access the slew command On the Entry keypad press 5 0 Enter to program a slew rate of 50 volts second Whenever a new immediate voltage value is entered the output will slew to the new level at 50 volts second Step mode uses the triggered slew rate First access the Voltage menu program the immediate and triggered voltage levels and set the slew mode to STEP Access the Voltage menu and press W to access the immediate slew command On the Entry keypad enter a value that equals infinity Access the Voltage menu and press V until you access the triggered slew command On the Entry keypad enter a value such as 5 0 Enter which sets the triggered slew rate to 50 volts second Then press Trigger Control and Enter followed by Shift Trigger After the trigger has been sent in step mode the triggered value becomes the new immediate value Pulse mode uses the triggered slew rate at the leading edge of the pulse and the immediate slew rate at the trailing edge of the pulse First access the Voltage menu program the immediate and triggered voltage levels and set the slew mode to PULSE Access the Pulse menu and program the pulse count duty cycle and pulse period Access the Voltage menu and press W to access th
79. n 2 Turn the front panel power switch to ON 1 The ac source undergoes a self test when you turn it on The following items appear on the display a A brief pattern that lights all display segments followed by the model number and the software revision number b The display then goes into the meter mode with the Dis annunciator on and all others off Meter mode means that the VOLTS digits indicate the output voltage and the FREQ digits indicate the output frequency The voltage will be at or near zero and the frequency will be at 60 Hertz Note If the ac source detects an error during self test the Err anunciator on the display will be lit Pressing the Shift and Error keys will show the error number Go to In Case of Trouble at the end of this chapter 4 Check that the ac source fan is on You should be able to hear the fan and feel the air coming from the unit Press Output on off once The Dis annunciator will go off and the CV annunciator will go on 6 Turn the unit off 31 3 Turn On Checkout Using the Keypad shift Some of the front panel keys perform two functions one labeled in black and the other in blue You access the blue function by first pressing the blue shift key Release the key after you press it The Shift annunciator will be on indicating that you have access to any key s shifted function a and F These keys let you scroll up and down through the choices in the presently selected f
80. n state of the unit as defined by the RST command RCLO sets the power on state of the unit to the state saved in RCL location 0 To clear the non volatile memory of the ac source proceed as follows 1 On the Function keypad press Shift Output and scroll to the RST com RST mand Then press Enter This returns the unit to the factory default settings 2 Save these settings to location 1 Press Shift Save 1 Enter SAV 1 3 Repeat step 2 for memory locations 2 through 16 SAV 2 SAV 3 SAV 4 SAV 16 58 Specifications Specifications Table A 1 lists the specifications of the ac source Performance specifications are warranted over the ambient temperature range of 0 to 40 C Unless otherwise noted specifications are for a sinewave with a resistive load at an output frequency range of 45 Hz to 1 kHz in ac coupled mode after a 30 minute warmup Refer to table A 3 for ac source operation with output frequencies from dc to 45 Hz Table A 1 Performance Specifications Parameter Agilent 6811B Agilent 6812B_ Agilent 6813B Phases 1 1 1 Maximum Output Ratings Power VA 375 VA 750 VA 1750 VA de Power Watts 285 W 575 W 1350 W rms Voltage 300 V 300 V 300 V de Voltage 425V 425 V 425 V rms Current in real time mode 3 25 A 6 5 A 13A de Current 2 5 A 5A 10A Repetitive peak Current 40 A 40A 80 A Non repetitive
81. nctions remain in effect until cleared Trigger 160 Vrms fi j yt I hh A RA hah Al in IRERE igi AAN i IN TT AULA 1 LADT ii iN HWE 1 TAY YP Up ay yy TEIS api porge p ESET AI Pil Vi ly 4 WV LE l UUN RRRS VV I o 1 2 3 m List Count 1 lt List Count 2 Figure 4 6 List Transients 52 Front Panel Operation 4 Action Display 1 Press Voltage to access the Voltage Menu Then press V to access the voltage mode VOLT M FIXED command 2 On the Entry keypad press or to scroll through the mode parameters to obtain LIST VOLT M_ LIST and press Enter 3 Access the List Menu by pressing Shift List The first menu command is the count From COUNT 2 the Entry keypad change the list count from the default 1 to 2 Press Enter 4 Access the List menu again and press until you access the dwell time This specifies DWEL 0 033 the on time for each voltage point which is effectively the output pulse width The first dwell point 0 appears in the display On the Entry keypad press 0 3 3 and Enter 5 Pressing the Enter key automatically advances to the step in the list Enter the following DWEL 1 067 values for dwell list points 1 through 5 067 083 067 150 067 Press Enter to DWEL 2 083 enter each value When you finish you will be at point 6 which is the end of the list DWEL 3 067 F DWEL 4 150 A Note Press Shift 4Index or Shift vindex
82. nd error must be used to arrive at the proper values of Ipeak Table 1 4 Recommended lpeak Settings as a Function of Loop Capacitance Capacitance in UF 127 V 254 V lt 1100 500 1200 1700 700 5000 1000 gt 5000 gt 1000 Ipeak Setting 80 A 60 A 50 A 45A lt 45A The following waveform illustrates the inrush current capability of the ac source The peak current is limited during inrush in accord with table 1 3 to keep the ac source from turning its output off Note that the output current waveform returns to its normal shape when the current drops below the peak current limit setting PEAK 45A CURRENT WAVEFORM VOLTAGE WAVEFORM VOLTAGE IS UNDISTORTED 115 Vrms PEAK CURRENT lt 45A Figure 1 3 Peak Inrush Current Example 17 1 General Information RMS Current Limit Circuit The output rms current limit is adjustable to any value within the range of the unit If the load attempts to draw more current than the programmed limit the output voltage is reduced to keep the rms current within the limit When the output voltage is reduced the waveform shape is preserved In other words all parts of the voltage cycle are reduced not just the peaks NOTE The speed at which the rms current circuit operates depends on the output voltage setting and the load impedance The circuit responds more slowly at low output voltages and at high output impedances With constant power or neg
83. ntil you access the DC parameter and press Enter This changes the metering function to dc which measures just the dc portion of the output in volts The meter annunciator indicates METER AC 8 Press Input again Press until you access AC and press Enter This changes the metering function to ac which measures just the ac portion of the output in rms volts The meter annunciator indicates METER DC 48 Display OFFSET 0 OFFSET 100 OUTP COUP AC OUTP COUP DC 156 V 50Hz INP COUP ACDC INP COUP DC 100V 50Hz INP COUP AC 120V 50Hz Front Panel Operation 4 4 Setting a Protection Feature You can set the ac source to disable its output if it detects an overvoltage or overcurrent fault condition Other automatic fault conditions such as overtemperature also will disable the output Set the overcurrent protection feature as follows Action Display 1 On the Function keypad press Protect Press to obtain the overcurrent command On the Entry keypad press once to scroll to the ON parameter and press Enter The PROT CLEAR CURR PROT OFF CURR PROT ON OCP annunciator will light indicating that the overcurrent protection circuit is on CURR PROT ON If you wish to set a time delay between the detection of the fault and the disabling of DELAY 1 the output scroll to the delay command on the protection menu The default delay is 100 milliseconds Enter the delay from the Entry keypad such as 2 5 0 Enter DEL
84. ombination of peak current duration and internal component temperature exceeds a predetermined limit When this occurs it means that the load has been drawing peak output currents that are beyond the capability of the ac source to supply for extended periods Slower output slew rates and reduced peak current limit settings can be used to control the conditions that cause SOA shutdowns OT Condition When the internal operating temperatures of the ac source exceed predetermined thresholds the output turns off If this happens you must let the unit cool down before continuing operation RI Condition If the Remote Inhibit input has been programmed to to disable the output when it receives an external signal the unit will shut down The Remote Inhibit input is set by the OUTPut RI MODE command In this case you must check to what external event produced a signal on the RI input Rail Condition The internal high voltage rail that provides power for the ac source s output is continuously monitored for proper voltage level If this voltage is not maintained within predetermined levels the output will shut down This can happen if an extenal source forces too much power into the ac source or if too much power is drawn from the ac source Remove the external source to eliminate the rail condition Slower output slew rates and reduced peak current limit settings can also be used to control the conditions that cause rail shutdowns 6 Using Tr
85. on of some minor readback specification differences information in this manual also applies to the following earlier ac source models Information about this current model Agilent 6811B Agilent 6812B Agilent 6813B Safety Considerations Agilent 6811A AC Power Source Analyzer Agilent 6812A AC Power Source Analyzer Agilent 6841A Harmonic Flicker Test System in normal mode Agilent 6813A AC Power Source Analyzer Agilent 6842A Harmonic Flicker Test System in normal mode also applies to the following earlier models This ac source 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 ac source and review this guide for safety warnings and instructions Safety warnings for specific procedures are located at appropriate places in the guide Options and Parts Table 1 1 Options Option Model Description OBN All Extra documentation 1CM All Rack mount kit Agilent p n 5062 3977 1CP All Rack mount kit with handles Agilent p n 5062 3983 100 Agilent 6811B 6812B 87 106 Vac 48 63 Hz Japan only 200 Agilent 6813B 174 106 Vac 48 63 Hz Japan only 230 Agilent 6811B 6812B 191 254 Vac 48 63 Hz 831 Agilent 6812B 6813B 12 AW
86. ot connect the ratio transformer or load resistor shown in Figure B 1 5 Press Shift Calibration scroll to the CAL VOLT OFFSET command and CAL VOLT OFFSET press Enter 6 Press Shift Calibration scroll to the CAL LEV P1 command and press CAL LEV P1 Enter to select the first calibration point 7 Press Shift Calibration scroll to CAL DATA 0 00 and use the Entry CAL DATA 0 00 keypad to enter the dc voltage value displayed on the DVM 8 Press Shift Calibration scroll to the CAL LEV P1 command use to CAL LEV P2 scroll to the P2 parameter and press Enter This selects the second calibration point 9 Press Shift Calibration scroll to CAL DATA 0 00 and use the Entry CAL DATA 0 00 keypad to enter the dc voltage value displayed on the DVM 10 Press Shift Calibration scroll to the CAL LEV P1 command use to CAL LEV P3 scroll to the P3 parameter and press Enter 72 11 12 13 The ac source is now holding the new voltage offset calibration constants in RAM Verification and Calibration B Press Shift Calibration scroll to CAL DATA 0 00 and use the Entry keypad to enter the dc voltage value displayed on the DVM Press Shift Calibration scroll to the CAL LEV P1 command use to scroll to the P4 parameter and press Enter Press Shift Calibration scroll to CAL DATA 0 00 and use the Entry keypad to enter the dc voltage value displayed on the DVM Calibrating and Entering DC Voltage Gain Values CAL DATA
87. ot warrant that the operation for the software firmware or hardware shall be uninterrupted or error free For warranty service with the exception of warranty options this product must be returned to a service facility designated by Agilent Technologies Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to Agilent Technologies for warranty service Except for products returned to Customer from another country Agilent Technologies shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in Agilent Technologies product price only if Customer pays Agilent Technologies international prices defined as destination local currency price or U S or Geneva Export price If Agilent Technologies is unable within a reasonable time to repair or replace any product to condition as warranted the Customer shall be entitled to a refund of the purchase price upon return of the product to Agilent Technologies LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer Customer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation and maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF ME
88. output voltage The following parameters may be calibrated ac output voltage output voltage measurement overvoltage protection OVP ac output current output current measurement output impedance eff Oe Oo o Before calibrating the output impedance you must first calibrate the output voltage and the output curent Front Panel Calibration Menu The Entry keypad is used for calibration functions Press this key to access the calibration menu Display Command Function CAL ON lt value gt Turns calibration mode on when the correct password value is entered CAL OFF Turns calibration mode off CAL LEV lt char gt Advance to next step in sequence P1 P2 P3 or P4 CAL DATA lt value gt Input a calibration measurement CAL VOLT OFFSET Begin voltage offset calibration CAL VOLT DC Begin dc voltage calibration sequence CAL VOLT AC Begin ac voltage calibration sequence CAL VOLT PROT Begin voltage protection calibration CAL CURR AC Begin ac current calibration sequence CAL CURR MEAS Begin current measurement calibration sequence CAL IMP Begin output impedance calibration sequence CAL SAVE Saves the calibration constants in non volatile memory CAL PASS lt value gt Notes value a numeric value Set new calibration password char a character string parameter Use and to scroll through the command list Use and to scroll through the parameter list 71 B Verification and Calibration Front Pan
89. peak Current 40 A 40 A 80 A inrush Crest Factor current 12 6 6 Output Frequency Range de 45 Hz 1 kHz Constant Voltage Ripple rms relative to full scale 60 dB and Noise rms 300 mV 20 kHz 10 MHz Regulation Load rms detection mode 0 5 of full scale Line 0 1 of full scale Maximum Total Harmonic 0 25 at 50 Hz 60 Hz Distortion 1 worst case 45 Hz 1 kHz Load Power Factor 0 1 Capability Maximum Fixed dc Offset 100 mV Voltage ac coupled Programming Accuracy rms Voltage 45 100 Hz 0 15 0 3 V rms detection mode 25 C gt 100 500 Hz 0 5 0 3 V 5 C of output offset gt 500 Hz 1 kHz 1 0 3 V Frequency 0 01 10 uHz de Voltage 0 1 0 5V_ 0 1 05V 0 5 0 3V Measurement Accuracy rms Voltage 45 100 Hz 0 03 100 mV 25 C 5 C of output offset gt 100 500 Hz gt 500 Hz 1 kHz Frequency dc Voltage 0 1 100 mV 0 2 100 mV 0 01 0 01 Hz 0 03 150 mV 59 A Specifications Parameter Measurement Accuracy continued Harmonic Measurement Accuracy 50 60 Hz 25 C 5 C of output offset rms Current High Range 45 100 Hz gt 100 500 Hz gt 500 Hz 1 kHz rms Current Low Range 45 100 Hz gt 100 500 Hz gt 500 Hz 1 kHz repetitive pk current High Range 45 Hz 1 kHz repetitive pk current Low Range 45 Hz 1 kHz Power VA Low Range
90. range limits 300 V 400 Hz 4 Program FREQ 1000 CURR PEAK 40 7 Record voltage readings at the DVM and on the front panel Readings within specified High display range limits 300 V 1 kHz Multiply the DVM reading by the transformer ratio if a ratio transformer is used 67 B Verification and Calibration DC Voltage Programming and Measurement Accuracy CAUTION Disconnect the ratio transformer for this test This test verifies the dc voltage programming GPIB readback and front panel meter functions Values read back over the GPIB should be the same as those displayed on the front panel Connect the negative terminal of the DVM to the COM output terminal to determine the dc offset voltages Action 1 Make sure the ac source is turned off Connect the DVM directly to the sense terminals 2 Turn on the ac source with no load In the Output menu execute the RST command to reset the unit Enable the output by pressing Output On Off Program the output voltage as follows VOLT 0 OUTP COUP DC OFFSET 425 3 Record DC voltage readings at the DVM and on the front panel display 4 Program OFFSET 425 5 Record DC voltage readings at the DVM and on the front panel display RMS Current Accuracy Test Normal Result Output voltage at 425 Vdc Output current near 0 Readings within specified dc voltage programming and readback limits Output voltage at 425 Vdc Readings within specified dc voltage p
91. ration and heatsink temperature NOTE Refer to Chapter 4 on how to clear the unit when the internal protection mode has been activated Peak Current Limit By programming the peak current limit you can prevent the unit from exceeding the safe operating area activating its internal protection mode and turning the output off The peak current limit circuit limits the instantaneous output current It functions by reducing the instantaneous output voltage to keep the output peak current within the programmed limit Because the circuit acts instantly the effect is that it will clip the peaks of the output voltage waveform Additionally with fast and or large voltage transitions the unit may momentarily go into CC operating mode due to current in the output capacitor This serves to limit the rate of change of output voltage The following table gives approximate indications of how long the unit will tolerate peak output currents before the SOA limits are exceeded Because these values are voltage dependent the table includes various equivalent dc voltages along with the peak current values The voltages shown in the table are NOT the programmed voltages but the average voltage values that will appear at the output when the indicated high current condition exists The SOA circuit becomes active at higher voltage and current values as well as at longer duration times Table 1 3 Typical Peak Current Output Capacities Agilent Agi
92. re proceeding it may take several minutes for the LEDs to go out Replace the fuse with one of the same type Do not use a slow blow type fuse Replace the cover Connect the line cord to the ac source SSD Oe a Turn on power and verify operation SIDE VIEW WITH COVER REMOVED IL UU UL FUSE LED Figure 3 2 AC Source Fuse Location 35 Front panel Operation Introduction Here is what you will find in this chapter a complete description of the front panel controls front panel programming examples that describe how to program the output voltage and frequency how to measure the output how to program the output pulses and lists how to trigger output changes Front Panel Description A m movman D AC POWER SOURCE ANALYZER SYSTEM FUNCTION entry vaemonic Curent A incon caswration Tou weer vage a 2 115 0V 60 0HZ Z e Le t eee m Oe se Y wder OV OC CR CP Unc Dis Tran OCP Prot Cal Shit Rmt Addr Er SRO ao i m E 4 fs s s A VOLTAGE FREQUENCY Z L 2 e SHH LINE als Figure 4 1 Front Panel Overall View 37 4 Front Panel Operation Display Annunciators Voltage Frequency Line System Keys Function Keys
93. rement Accuracy 67 DC Voltage Programming and Measurement Accuracy 68 RMS Current Accuracy Test 68 Performing the Calibration Procedure 71 Front Panel Calibration 72 Enable Calibration Mode 72 Calibrating and Entering Voltage Offset Values 72 Calibrating and Entering DC Voltage Gain Values 73 Calibrating and Entering AC rms Voltage Gain Values 73 Calibrating the OVP Trip Point 74 Calibrating and Entering rms Current Values 74 Calibrating and Entering rms Current Measurement Values 15 Calibrating the Output Impedance 75 Saving the Calibration Constants 75 Changing the Calibration Password 76 Calibration Error Messages 76 Calibration Over the GPIB 76 Agilent Calibration Program Listing 76 C ERROR MESSAGES 81 Error Number List 81 D LINE VOLTAGE CONVERSION 85 Open the Unit 85 Check the Jumper Wire Model Agilent 6811B 6812B only 85 Check the Line Jumpers all Models 85 Check the Power Transformer Connector all Models 85 Close the Unit 86 INDEX 87 General Information Document Orientation This manual describes the operation of the Agilent 6811B 6812B 6813B AC Power Solutions These units will be referred to as ac sources throughout this manual The following documents are shipped with your ac source a Quick Start Guide to help you quickly get started using the ac source a User s Guide containing detailed installation checkout and front panel information a Programming Guide containing detailed GPIB programming infor
94. rent 2mA 4mA 4mA peak Current 12 5 mA 25 mA 25 mA Output Frequency 10 pHz Output Impedance Resistive Component 0 01 Q Inductive Component 10 pH Average Measurement Resolution rms Voltage 10 mV rms Current 2 mA THD for a fundamental amplitude gt 5 of full scale 5 of reading 0 1 Measurement System Measurement Buffer Length Measurement Generation Synchronization Measurement Acquisition Sampling Rate Range Voltage Current Digitization Accuracy Voltage Current Digitization Resolution Harmonic Measurement Time amplitude Meas Curr Harm lt n gt Meas Array Curr Harm 4096 points lt 50 us 25 250 us 12 bits 16 bts 400 ms 10s 61 A Specifications Table A 2 Supplemental Characteristics continued Parameter Transient System Phase Synchronization Pulse Width Range Pulse Dwell Timing Accuracy Pulse Duty Cycle Range Pulse Count Range LIST Length Minimum LIST Dwell Time LIST Count Range External Trigger Response Time Maximum External Trigger Rate Waveform Table Voltage Resolution RS 232 Interface Capabilities Baud Rates Data Format Language Trig In Trig Out Characteristics Trig Out HC TTL output Trig In 10k pullup INH FLT Characteristics Maximum Ratings INH Terminals FLT Terminals Saveable Data nonvolatile Instrument States User defined waveforms List data GPIB Interface Capabilities Language Interface
95. rogramming and readback limits This test verifies the accuracy of the current measurement in rms detection mode Action 1 Turn off the ac source and connect the DVM the 20 ohm load resistor and current shunt as shown in Figure B 1 with S1 closed Connect the DVM across the current shunt 2 Turn on the ac source In the Output menu execute the RST command to reset the unit Enable the output by pressing Output On Off Program the output as follows For Agilent 6811B VOLT 50 CURR RANGE LOW CURR LEV 3 00 For all other models VOLT 50 CURR RANGE LOW CURR LEV 5 00 3 Record the DVM voltage reading and calculate the rms current 4 Program CURR RANGE HIGH 5 Record the DVM voltage reading and calculate the rms current 68 Normal Result CC annunciator on Output current at 3 0 Agilent 6811B or 5 0 A all other models Readings within specified limits CC annunciator on Output current at 3 0 Agilent 6811B or 5 0 A all other models Readings within specified limits Verification and Calibration B Table B 2 Agilent 6811B Verification Test Record Model Agilent 6811B Report No Date Test Description Minimum Recorded Results Maximum Specification Specification Voltage Programming and Measurement Accuracy 300 Vrms accuracy at 45 Hz 299 250 V V 300 750 V Front Panel Measurement Vrms 190 mV V Vrms 190 mV 300 Vrms accuracy at 400 Hz 298 200 V V 301 800 V Front Panel Measurement Vrm
96. s 190 mV V Vrms 190 mV 300 Vrms accuracy at 1 kHz 296 700 V V 303 300 V Front Panel Measurement Vrms 400 mV V Vrms 400 mV DC Programming and Measurement Accuracy 425 Vdc accuracy 424 075 V V 425 925 V Front Panel Measurement Vdc 0 277 V V Vrms 0 277 V 425 Vdc accuracy 424 075 V V 425 925 V Front Panel Measurement Vdc 0 277 V f Vrms 0 277 V RMS Current Measurement Accuracy Low Range Tout 0 0039 A A Tout 0 0039 A High Range Iout 0 0095 A A Tout 0 0095 A lout calculated output current 60Hz Table B 3 Agilent 6812B Verification Test Record Model Agilent Report No Date Test Description Minimum Recorded Results Maximum Specification Specification Voltage Programming and Measurement Accuracy 300 Vrms accuracy at 45 Hz 299 250 V V 300 750 V Front Panel Measurement Vrms 190 mV V Vrms 190 mV 300 Vrms accuracy at 400 Hz 298 200 V V 301 800 V Front Panel Measurement Vrms 190 mV V Vrms 190 mV 300 Vrms accuracy at 1 kHz 296 700 V V 303 300 V Front Panel Measurement Vrms 400 mV V Vrms 400 mV 69 B Verification and Calibration Table B 3 continued DC Programming and Measurement Accuracy 425 Vdc accuracy 424 075 V V 425 925 V Front Panel Measurement Vdc 0 277 V V Vrms 0 277 V 425 Vdc accuracy 424 075 V V 425 925 V Front Panel Measurement Vdc 0 277 V V Vrms 0 277 V RMS Current Measurement Accuracy Low Range Tout 0 0
97. s output voltage Set triggered rms output voltage Select the voltage mode FIXED STEP PULSE or LIST Set immediate dc offset voltage Set triggered dc offset voltage Select the dc offset voltage mode FIXED STEP PULSE or LIST Set immediate voltage slew rate in volts second Set triggered voltage slew rate in volts second Select the voltage slew mode FIXED STEP PULSE or LIST Set immediate dc offset voltage slew in volts second Set triggered dc offset voltage slew in volts second Select the dc offset voltage slew mode FIXED STEP PULSE or LIST Select the voltage sense source INT or EXT Select the voltage sense detector RTIME or RMS Press this key to access the current menu list Display CURR LEV lt value gt CURR PEAK lt value gt CURR PEAK T lt value gt CURR PEAK M lt value gt Command Function Set immediate rms output current limit Set immediate peak output current limit Set triggered peak output current limit Select the peak output current limit mode FIXED STEP PULSE or LIST Press this key to access the frequency menu list Display FREQ lt value gt FREQ T lt value gt FREQ M lt char gt SLEW lt value gt SLEW T lt value gt SLEW M lt char gt Notes value a numeric value Command Function Set immediate output frequency Set triggered output frequency Select the frequency mode FIXED STEP PULSE or LIST Set immediate frequency slew rate in volts second Set trig
98. ss any harmonic or list point These Entry keys let you scroll through choices in a parameter list that apply to a specific command Parameter lists are circular you can return to the starting position by continuously pressing either key If the command has a numeric range these keys increment or decrement the existing value Front Panel Operation 4 Meter Display Keys Metering keys control the metering functions of the ac source Press this key to access the meter menu list Display Measurement lt reading gt V lt reading gt Hz rms voltage and frequency the default lt reading gt V lt reading gt A rms voltage and rms current lt reading gt A lt reading gt Hz rms current and frequency the default lt reading gt V lt reading gt W rms voltage and power lt reading gt CREST F current crest factor lt reading gt A PK REP peak current repetitive lt reading gt A PK NR peak current nonrepetitive lt reading gt VA apparent power lt reading gt VAR reactive power lt reading gt PFACTOR power factor Press this key to specify the following metering functions Display Command Function INP COUP lt char gt Choose meter coupling AC DC or ACDC CURR RANGE lt char gt Current measurement range HIGH or LOW HIGH for measuring rms currents gt 5 7 A LOW for measuring rms currents lt 5 7 A WINDOW lt char gt Select harmonic measurement window meter KBESSEL RECT Press this key to access the harmonic menu list Display
99. stability If you cannot achieve satisfactory results with this procedure disable the output impedance control and use an external impedance network Rms voltage regulation can be used in conjunction with programmable output impedance to regulate the rms value of the ac component of the output voltage when programmed impedances cause distortion with nonlinear loads or reduced output voltage due to regulation effects Note that real time voltage regulation will permit the load current to cause output voltage degradation based on the programmed impedance and current drawn from the source whereas rms regulation will reestablish the rms value at the programmed level Output Coupling Ac output coupling mode mimics a transformer coupled output working to maintain zero average output voltage This means that the output tries to remove any dc content on the output whether the dc content is generated from a programmed offset or results from transients with dc content The ac output coupling has a corner frequency of about 2 Hz which will not prevent transient waveforms that may have short term dc content but will regulate the waveform back to an average value of zero volts in the steady state Dc output coupling mode is used to generate dc offset voltages or output transients that have net dc components In either mode of operation the maximum voltage that the ac source can output is limited to 425 V peak The ac capability of the output is limi
100. status registers of all activated protection signals The fault causing a signal must be corrected or removed before the register can be cleared CURR PROT lt char gt Set overcurrent protection function ON or OFF VOLT PROT lt value gt Set the overvoltage protection level DELAY lt value gt Set the time delay for activating a protection fault after programming the output Press this key to access the status menu list Note that in the following list commands ending in clear the registers when they are read For this reason the registers are read only after you press not when you scroll to the command Display Command Function CLS Executes the clear status CLS command STATUS PRESET Execute the STATus PRESet command ESR lt value gt Return Event Status register value STB lt value gt Return Status Byte register value OPER EVEN lt value gt Return STAT OPER EVENT value OPER COND lt value gt Return STAT OPER COND value QUES EVEN lt value gt Return STAT QUES EVENT value QUES COND lt value gt Return STAT QUES COND value Notes Programmed in peak volts Other voltage parameters are programmed in rms volts value a numeric value char a character string parameter and scroll through the command list and scroll through the parameter list 44 Trigger and List Control Keys Front Panel Operation 4 The Trigger Control key controls output transient triggers The List key controls the generation of o
101. surement sales representative United States Agilent Technologies Test and Measurement Call Center P O Box 4026 Englewood CO 80155 4026 tel 1 800 452 4844 Canada Agilent Technologies Canada Inc 5150 Spectrum Way Mississauga Ontario L4W 5G1 tel 1 877 894 4414 Europe Agilent Technologies Test amp Measurement European Marketing Organisation P O Box 999 1180 AZ Amstelveen The Netherlands tel 31 20 547 9999 Japan Agilent Technologies Japan Ltd Measurement Assistance Center 9 1 Takakura Cho Hachioji Shi Tokyo 192 8510 Japan tel 81 426 56 7832 fax 81 426 56 7840 Technical data is subject to change 90 Latin America Agilent Technologies Latin American Region Headquarters 5200 Blue Lagoon Drive Suite 950 Miami Florida 33126 U S A tel 305 267 4245 fax 305 267 4286 Australia New Zealand Agilent Technologies Australia Pty Ltd 347 Burwood Highway Forest Hill Victoria 3131 tel 1 800 629 485 Australia fax 61 3 9272 0749 tel 0 800 738 378 New Zealand fax 64 4 802 6881 Asia Pacific Agilent Technologies 24 F Cityplaza One 1111 King s Road Taikoo Shing Hong Kong tel 852 3197 7777 fax 852 2506 9284 Manual Updates The following updates have been made to this manual since the print revision indicated on the title page 4 15 00 All references to HP have been changed to Agilent All references to HP IB have been
102. t checkout procedure 1 100 W light bulb 1 light bulb socket wires for connecting socket to the unit NOTE When the ac source is turned on as shipped from the factory it asserts the RST state You can subsequently program the unit to turn on according to the state stored in RCL location 0 as explained in Chapter 4 The following procedures assume that the unit turns on in the RST state Make sure that the unit is turned off and make the following connections to the output 32 Turn On Checkout 3 100 W Procedure Turn the unit on Press the Voltage key Press 1 2 0 Enter Press Output On Off Press Protect Press 4 or V and scroll to the VOLT PROT item Press 1 6 0 Enter Press Protect scroll to the VOLT PROT item and press 3 2 0 Enter Press Protect and Enter Figure 3 1 Verification Connections Display Meter mode VOLT 0 00 VOLT 120 120 V 60 Hz PROT CLEAR VOLT PROT 500 VOLT PROT 160 OV 60Hz VOLT PROT 320 120 V 60 Hz Explanation Meter mode is active and the Dis annunciator should be on Display indicates the default settings Programs the output voltage to 120 Vrms After the value is entered the display returns to Meter mode which indicates that no voltage is applied to the output Turns the output on and applies 120 volts to the light bulb The Dis annunciator should be off and
103. t secure the two carrying straps and outer cover use a T25 Torx drive Slightly spread the bottom rear of the cover and pull it back to remove it from the front panel Observe the two LEDs that are visible in the cutouts on each side of the unit If either LED is on there is hazardous voltage inside the unit Wait until the LED goes out before proceeding this may take several minutes Check the Jumper Wire Model Agilent 6811B 6812B only Locate the line voltage jumper wire in the cutout at the side of the unit by the line cord see Figure D 1 For 100 V or 120 V operation install the jumper on the lug labeled 100 120 For 200 V 208 V or 230 V operation install the jumper on the lug labeled 200 220 Check the Line Jumpers all Models Locate the line jumpers in the cutout at the side of the unit by the on off switch Configure the jumpers according to the line voltage shown in the accompanying label When configuring a unit for 208 V use the jumper settings shown for 200 V Check the Power Transformer Connector all Models NOTE This procedure is only required if you are changing the input voltage between 100 V and 120 V or between 200 208 V and 230 V Remove the screws securing the inner cover use a T15 Torx drive Remove the inner cover Remove the screws securing the pc board behind the front panel use a T15 Torx drive 85 D Line Voltage Conversion You need only to lift the board out of
104. tatus Ingrd received bad token Ingrd receiver buffer overrun Ingrd input buffer overrun Outgrd output buffer overrun RS 232 receiver framing error RS 232 receiver parity error RS 232 receiver overrun error Ingrd inbuf count sync error Front panel uart overrun Front panel uart framing Front panel uart parity Front panel buffer overrun Front panel timeout CAL switch prevents calibration CAL password is incorrect CAL not enabled Computed readback cal constants are incorrect Computed programming cal constants are incorrect Incorrect sequence of calibration commands Systems in mode list have different list lengths Requested voltage and waveform exceeds peak voltage capability Requested voltage and waveform exceeds transformer volt second rating Command only applies to RS 232 interface Trigger received before requested number of pre trigger readings Requested RMS current too high for voltage range Waveform data not defined VOLT VOLT SLEW and FUNC SHAP modes incompatible Measurement overrange Output buffer overrun Command cannot be given with present SYST CONF setting 83 Line Voltage Conversion WARNING Shock Hazard Hazardous voltage can remain inside the unit even after it has been turned off This procedure should only be done by qualified electronics service personnel Open the Unit Turn off the ac power to the unit and disconnect the power cord from the power outlet Remove the four screws tha
105. ted by VA volt amperes rather than power watts The amount of VA available to a load can be determined by examining figure 1 2 Full output VA is available with no limitations except for the boundaries imposed by the maximum rms voltage of 300V and the maximum rms current which is model dependent Note that large peak power transients can be delivered by the ac source as earlier described under Peak Current Capability Appendix A documents the ac source s specifications and supplemental characteristics 19 Installation Inspection Damage When you receive your ac source inspect it for any obvious damage that may have occurred during shipment If there is damage notify the shipping carrier and the nearest Agilent Sales and Support Office immediately The list of Agilent Sales and Support Offices is at the back of this guide Warranty information is printed in the front of this guide Packaging Material Until you have checked out the ac source save the shipping carton and packing materials in case the unit has to be returned If you return the ac source for service attach a tag identifying the model number and the owner Also include a brief description of the problem Items Supplied Check that the following items are included with your ac source Some items are installed in the unit Power Cord A power cord appropriate for your location The cord may or may not be terminated in a power plug see Options in Chapter 1 If the
106. ted with SCPI syntax errors and interface problems It also lists the device dependent errors Information inside the brackets is not part of the standard error message but is included for clarification When errors occur the Standard Event Status register records them in bit 2 3 4 or 5 Table C 1 Error Numbers Error Number Error String Description Explanation Examples Command Errors 100 through 199 sets Standard Event Status Register bit 5 100 Command error generic 101 Invalid character 102 Syntax error unrecognized command or data type 103 Invalid separator 104 Data type error e g numeric or string expected got block data 105 GET not allowed 108 Parameter not allowed too many parameters 109 Missing parameter too few parameters 112 Program mnemonic too long maximum 12 characters 121 Invalid character in number includes 9 in octal data etc 123 Numeric overflow exponent too large exponent magnitude gt 32 k 124 Too many digits number too long more than 255 digits received 128 Numeric data not allowed 131 Invalid suffix unrecognized units or units not appropriate 138 Suffix not allowed 141 Invalid character data bad character or unrecognized 144 Character data too long 148 Character data not allowed 150 String data error 151 Invalid string data e g END received before clos
107. the AC Source Connect the current shunt and 20 ohm load resistor Connect the 3458A to the rear terminals via the ratio transformer see fig B 1 Figure B 2 Calibration Program Listing Sheet 2 of 3 PaQaqCnaZa QP PAGDAZPAGGMAAZPGGAME AVACOSBVOOVVNO VYVVUVH QOOBOVHRZOOVHSZOOCVVABZOCVHBZOOMWH Z2y7NrQqPWDAGWPH RINT TABXY 15 RINT TABXY 15 I AUSE LEAR SCREEN RINT TABXY 22 RINT TABXY 20 OUTPUT Ac CA OUTPUT Ac CA OUTPUT Ac CA WAIT 10 PUT Enter AC rms current DVM reading divided by shunt resistance T TABXY 25 TPUT Ac CA TPUT Ac CA T 10 T TABXY 25 TPUT Ac CA T 10 EAR SCREEN T TABXY 22 T TABXY 20 PUT Ac CA TPUT Ac CA T 10 5 3 T TABXY 25 TPUT Ac CA PUT Ac CA T 10 3 T TABXY 25 TPUT Ac CA liens PUT Ac CA TPUT Ac CA LEAR SCREEN 3 3 ac TABXY TABXY TABXY TABXY LS LS AS 15 Dam HHHH SP Press CO USE T TABXY 15 PUT Ac CA PUT Ac CA T TABXY 30 T 30 TPUT Ac CA TPUT Ac CA EAR SCREEN T TABXY 25 3 J 3 J D Verification and Calibration B 1110 RINT TABXY 15 9 3 Connect the 3458A across the current shunt 11 4 Set the 3458A to AC rms VOLTS 13 5 Turn on the AC Source SP Press CONT to begin Current Program and Measurement calibration 5 CALIBRATING CURRENT POGRAMMING 7 There are 2 points to be calibrated L STATE ON L CURR
108. the Power Cord Output Connections Wire Considerations Voltage Drops Remote Sense Connections Remote Sensing and OVP Considerations Trigger Connections Digital Connections Controller Connections GPIB Connector RS 232 Interface NADA MN wv 3 TURN ON CHECKOUT 31 Introduction 31 Preliminary Checkout 31 Using the Keypad 32 Checkout Procedure 32 In Case of Trouble 34 Error Messages 34 Line Fuse 35 4 FRONT PANEL OPERATION 37 Introduction 37 Front Panel Description 37 System Keys 39 Function Keys 40 Immediate Action Keys 40 Scrolling Keys 40 Vieter Display Keys 4 Output Control Keys 42 Protection and Status Control Keys 44 Trigger and List Control Keys 45 Entry Keys 46 Examples of Front Panel Programming 47 1 Setting the Output Voltage Amplitude 47 2 Setting the Output Frequency 47 3 Setting the DC Offset 48 4 Setting a Protection Feature 48 5 Clearing Protection Conditions 49 6 Using Transient Voltage Modes 50 7 Trigger Delays and Phase Synchronization 53 8 Using Slew Rates to Generate Waveforms 55 9 Measuring Peak Inrush Current 57 10 Setting the GPIB Address and RS 232 Parameters 58 11 Saving and Recalling Operating States 58 A SPECIFICATIONS 59 Specifications 59 Supplemental Characteristics 61 Operation Below 45 Hz 53 B VERIFICATION AND CALIBRATION 65 Introduction 65 Equipment Required 65 Test Setup 66 Performing the Verification Tests 67 Turn On Checkout Procedure 67 AC Voltage Programming and Measu
109. tion 2 see below prevents this 2 When the ac source wants to talk which means that it has processed a query and has seen a lt newline gt message terminator it will set DTR false This implies that once a query has been sent to the power source the bus controller should read the response before attempting to send more data It also means that a lt newline gt must terminate the command string After the response has been output the ac source will set DTR true again unless condition 1 prevents this The ac source monitors the DSR data set ready line to determine when the bus controller is ready to accept data It checks this line before each character is sent and the output is suspended if DSR is false When DSR goes true transmission will resume The ac source will leave DTR false while output is suspended A form of deadlock exists until the bus controller asserts DSR true to allow the ac source to complete the transmission Control C is the equivalent to the GPIB device clear command It clears the operation in progress and discards any pending output For the control C character to be recognized by the power source while it holds DTR false the bus controller must first set DSR false Null modem RS 232 interface cables swap the DTR and DSR lines as shown in the following figure For other bus controllers or languages you must determine what form of hardware handshake is used You may have to build a customized cable to connect th
110. to access and edit any list point DWEL 5 067 DWEL 6 EOL 6 Press w until you access the voltage list This specifies the amplitude of each output point during its corresponding dwell period The first voltage list point 0 appears in the VOLT O 160 display On the Entry keypad press 1 6 0 and Enter 7 Pressing the Enter key automatically advances to the step in the list Enter the following VOLT 1 0 values for voltage list points 1 through 5 0 120 0 80 0 Press Enter to enter each VOLT 2 120 value When you finish you will be at point 6 which is the end of the list VOLT 3 0 f VOLT 4 80 A Note Press Shift 4Index or Shift vindex to access and edit any list point VOLT 5 0 VOLT 6 EOL 8 Press V until you access the step command Check that it is at the default mode AUTO STEP AUTO This lets a single trigger run your list for the specified count 9 Press Output On Off to enable the output The Dis annunciator will go off OV 60Hz 10 Press Trigger Control and Enter to initiate the transient trigger sequence INIT IMMED 11 Press Shift Trigger This sends the ac source an immediate trigger to generate the four 0 V 60 Hz output pulses The output returns to the immediate value at the end of the list Note To clear a list press Clear Entry This truncates or clears the list at the presently displayed list point Each list must be accessed and cleared separately 7 Trigger Delays and Phase Synchronization The ac so
111. typical performance determined either by design or type testing Table A 2 Supplemental Characteristics Parameter Agilent 6811B Agilent 6812B Agilent 6813B ac Input Voltage Range Vac 87 106 Vac 100 Vac nom 174 220 Vac 104 127 Vac 120 Vac nom 200 208 Vac nom 174 220 Vac 200 208 Vac nom 191 254 Vac 191 254 Vac 230 Vac nom 230 Vac nom Maximum Input Current rms 12 A 100 Vac 28 A 100 Vac 20 A 230 Vac 10 A 120 Vac 24 A 120 Vac 22 A 200 208 Vac 7 5 A 200 208 Vac 15 A 200 208 Vac 6 5 A 230 Vac 13A 230 Vac Maximum Input Power 1000 VA 700 W 2500 VA 1400W 3800 VA 2600 W ac Input Frequency 47 63 Hz Isolation to Ground 300 Vrms 425 Vdc Output Voltage Risetime 50 us output change from 10 to 90 or 90 to 10 of its total excursion with full resistive load Remote Inhibit Response Time 15 ms Remote Sense Capability Up to 1 Vrms can be dropped across each load lead Programmable Output Impedance Ranges Resistance Inductance 0 1 20 wH 1 mH Average Programming Accuracy rms Current OVP 1 2 of output 50 mA 2 of output 5 Vpeak ac Voltage Slew Rate rms 0 1 V s Frequency Slew Rate 0 01 Average Programming Resolution rms Voltage 125 mV dc Voltage 250 mV ac Voltage Slew Rate rms 6 mV s dc Voltage Slew Rate 20 mV s Frequency Slew Rate 0 05 Hz s Overvoltage Programming OVP 2 Vpeak rms Cur
112. unction menu All menu lists are circular you can return to the starting position by continuously pressing either key a and eal These keys let you select the previous or the next parameter for a specific command If the command has a numeric range these keys increment or decrement the existing value fe The backspace key is an erase key If you make a mistake entering a digit and have not yet pressed Enter you can delete the digit by pressing Delete more digits by repeatedly pressing this key Executes the entered value or parameter of the presently accessed command Until you press this key the parameters you enter with the other keys are displayed but not entered into the ac source After pressing Enter the ac source returns to Meter mode in most cases In Harmonic or List mode the ac source displays the next point in the list Checkout Procedure WARNING LETHAL VOLTAGES Ac sources can supply 425 V peak at their output DEATH on contact may result if the output terminals or circuits connected to the output are touched when power is applied The output test requires that you connect light bulbs to the output of the unit and apply a potentially hazardous voltage of 120 Vac Properly shield all connections and wires The test in this section checks for output voltage and current on the ac source by having you connect light bulbs to the output of the unit The following equipment is recommended for performing this outpu
113. urce trigger system also lets you program trigger delays as well as synchronize output changes to a specific phase angle of the output waveform In example the output transient is triggered immediately at the receipt of the trigger signal In example a delay time of approximately 16 7 milliseconds elapses between the occurence of the trigger and the start of the output transient In example the trigger source is programmed for phase synchronization which means that the transient occurs at the first occurrence of the specified phase angle after the trigger signal is received 53 4 Front Panel Operation Note that phase synchronization is referenced to an internal phase signal The output of the unit is normally offset by 0 with respect to this internal reference Because synchronized transient events always occur with respect to the internal reference the output will normally be in phase with the value programmed for phase synchronization The Phase command can be used to change the offset of the output with respect to the internal phase reference Trigger 1 VOLT T level G N fos y o N y oy VOLT level 25 gt 5S Ss F Ne i PA 3 re MS 7 F J S VOLT T level 4 lt P l n gt VOLT level 7 gt a a aA 2 RN we ES Ye ae ue X sa F ka t l i 0 000 l 0 0167 VOLT Teves 555355555 FESSA s PN J P iS J as 3 VOLTleve 5 lt es A f
114. utput lists A list can contain up to 100 points each of which can specify an output change or transient Refer to Chapter 4 of the Programming Guide for more information about programming triggers and lists Trigger Control Press this key to access the trigger control menu list Display INIT IMMED INIT CONT lt char gt TRIG SOUR lt char gt DELAY lt value gt ABORT SYNC SOUR lt char gt SYNC PHASE lt value gt Command Function Initiate the transient trigger sequence immediately Set continuous trigger initiation ON or OFF Select transient trigger source BUS EXT TTLT or IMM Set trigger delay in seconds Abort all trigger sequences Select trigger sync source PHASE or IMM Set synchronous phase reference angle in degrees Press this key to access the list commands Display COUNT lt value gt DWEL lt index gt lt value gt FREQ lt index gt lt value gt FSLW lt index gt lt value gt IPK lt index gt lt value gt OFFS lt index gt lt value gt OSLW lt index gt lt value gt PHASE lt index gt lt value gt SHAP lt index gt lt char gt STEP lt char gt TTLT lt index gt lt value gt VOLT lt index gt lt value gt VSLW lt index gt lt value gt Notes Command Function Specifies the number of times a list repeats List of output dwell times List of output frequencies List of output frequency slew rates List of output peak current limits List of dc output volta
115. visions are covered by change sheets shipped with the manual In some cases the manual change applies only to specific instruments Instructions provided on the change sheet will indicate if a particular change applies only to certain instruments This document contains proprietary information protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated into another language without the prior consent of Agilent Technologies The information contained in this document is subject to change without notice Copyright 1995 1997 1998 Agilent Technologies Inc Edition 1 August 1995 Edition 2 February 1997 Edition 3 March 1998 Edition 4 December 1998 Update April 2000 Table of Contents Warranty Information Safety Summary Declaration of Conformity Acoustic Noise Information Printing History Table of Contents GENERAL INFORMATION Document Orientation Earlier AC Source Models Safety Considerations Options and Parts Description Capabilities Front Panel Remote Operation Steady state Output Characteristic Peak Current Dynamic Power Capability Peak Current Limit Peak Inrush Example RMS Current Limit Circuit Voltage Regulation Real Time Regulation RMS Regulation Output Impedance Output Coupling 2 INSTALLATION Inspection Damage Packaging Material Items Supplied Cleaning Location Bench Operation Rack Mounting Input Connections Input Source and Line Fuse Installing

Agilent Technologies 6813B User's Manual

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