Agilent Technologies 6843A manual

User’s Guide AC Power Solutions Agilent Models 6814B, 6834B, and 6843A For instruments with Serial Numbers: Agilent 6814B: 3601A-00101 through 00270 US36010101-up Agilent 6834B: 3601A-00101 through 00140 US36010101-up Agilent 6843A: 3540A-00101 through 00140 US35400101-up Agilent Part No. 5962-0887 Printed in U.S.A. Microfiche No 5962-0888 Decemb[...]

2 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 fa[...]

3 Safety Summary The f ollowin g g eneral sa f et y p recautions must be observed duri n g all p hases o f o p eration o f this instrumen t. Failure to com p l y with th ese p recautions or with s p eci f ic warnin g s elsew here in this manual viol ates sa f et y standards o f desi g n, manu f acture, and int ended use o f the instrument. A g ilen[...]

4 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 [...]

5 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 6814[...]

6 Acoustic Noise Information Herstellerbescheinigung Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenl ä minformationsverordnung vom 18 Januar 1991. * Schalldruckpegel Lp <70 dB(A) * Am Arbeitsplatz * Normaler Betrieb * Nach EN 27779 (Typpr ü fung). Manufacturer’s Declaration This statement is provided to comply wi[...]

7 Table of Contents Warranty Information 2 Safety Summary 3 Declaration Page 5 Acoustic Noise Information 6 Printing History 6 Table of Contents 7 1. GENERAL INFORMATION 9 Document Orientation 9 Safety Considerations 10 Options, Accessories, and User Replaceable Parts 10 Description 10 Capabilities 11 Front Panel/Remote Operation 12 Output Characte[...]

8 4. FRONT PANEL OPERATION 31 Introduction 31 Front Panel Description 31 System Keys 33 Function Keys 34 Immediate Action Keys 34 Scrolling Keys 35 Meter Display Keys 35 Output Control Keys 36 Protection and Status Control Keys 38 Trigger and List Control Keys 39 Entry Keys 40 Examples of Front Panel Programming 41 1 - Setting the Output Voltage Am[...]

9 1 General Information Document Orientation This manual describes the operation of the Agilent Technologies 6814B/6834B/6843A AC Power Solutions. These units will be referred to as "ac sources" throughout this manual. Operation of the Agilent 6843A is described for normal mode operation only. The following documents are shipped with your[...]

1 - General Information 10 Safety Considerations 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. Befo[...]

General Information - 1 11 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[...]

1 - General Information 12 • Additional total power and neutral current measurements in the three-phase model. • 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 fluorescent display, keypad, and [...]

General Information - 1 13 Figure 1-2. AC Source Output Characteristic (in real-time mode) Output VA Capability The output capability of each output phase is limited by VA (volts-amps) rather than power (watts). The amount of VA available to a load can be determined by examining figure 1-3, the output power curve. This curve rates the available VA [...]

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15 2 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 [...]

2 - Installation 16 Location Refer to the Safety Summary page at the beginning of this manual for safety-related information about environmental conditions. WARNING: Agilent 6814B units weigh 79.5 kg (175 lbs.) Agilent 6834B/ 6843A units weigh 87.7 kg (193 lbs.) Obtain adequate help when moving the unit or mounting the unit in the rack. Bench Opera[...]

Installation - 2 17 Input Connections Input Source and Line Fuse The ac source requires a 3-phase power service that provides 7350 VA (6000 W) maximum. The power service should have a current rating greater than or equal to the ac source’s circuit breaker rating. The ac source has a delta input (no neutral connection) and will accept power from e[...]

2 - Installation 18 Figure 2-2. Connecting the Power Cord Output Connections The power output terminal block has a termination for each of the output phases ( φ 1, φ 2, φ 3 ) and a floating neutral line (COM) for the phase return connections. A separate earth ground terminal ( ⊥ ) is located near the output terminals. Figure 2-3. Output Connec[...]

Installation - 2 19 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 Wire Considerations Current Ratings Fire Hazard To satisfy safety requirements, load wires must be large enough not to overheat when carrying the maximum short-cir[...]

2 - Installation 20 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 fo[...]

Installation - 2 21 OVP Considerations The overvoltage protection circuit senses voltage near the output terminals, not at the load. Therefore the signal sensed by the OVP circuit can be significantly higher than the actual voltage at the load. When using remote sensing, you must program the OVP trip voltage high enough to compensate for the voltag[...]

2 - Installation 22 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[...]

Installation - 2 23 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 unp[...]

2 - Installation 24 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 a[...]

25 3 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 mo[...]

3 - Turn-On Checkout 26 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. And[...]

Turn-On Checkout - 3 27 Make sure that the unit is turned off , and make the following connections to the output. If you are verifying a single phase source, you only need to connect one bulb. Figure 3-1.Verification Connections Procedure Display Explanation 1. Turn the unit on. Meter mode Meter mode is active and the Dis annunciator should be on. [...]

3 - Turn-On Checkout 28 Procedure Display Explanation 11. Press  or ô and scroll to the VOLT:PROT item VOLT:PROT 500 Display shows the overvoltage protection trip voltage for your unit. The overvoltage protection voltage is programmed in peak , not rms volts. 12. Press 1, 6, 0, Enter VOLT:PROT 160 Programs the OVP to 160 Vpeak, the rms value of[...]

Turn-On Checkout - 3 29 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 &l[...]

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31 4 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 chan[...]

4 - Front Panel Operation 32 j Display 14-character vacuum fluorescent display for showing programmed commands and measured values. k Annunciators Annunciators light to indicate operating modes and status conditions: φ 1, φ 2, φ 3 Phase 1, 2, or 3 is being controlled or metered. CV The ac source output is in constant-voltage mode. CC The ac sour[...]

Front Panel Operation - 4 33 System Keys Refer to the examples later in this chapter for more details on the use of these keys. SY STE M Reca ll Sav e Error Addre ss Local Figure 4-2. System Keys This is the blue, unlabeled key, which is also shown as in this guide. Pressing this key accesses the alternate or shifted function of a key (such as ERRO[...]

4 - Front Panel Operation 34 Function Keys Refer to the examples later in this chapter for more details on the use of these keys. FUNCT I ON Meter Input Protect Trigger Output Status Harm onic Trigger Control Current Voltage Freq Phase Shape Puls e List Index Index Output on/off Phase Select Figure 4-3. Function Keys Immediate Action Keys Immediate[...]

Front Panel Operation - 4 35 Scrolling Keys Scrolling keys let you move through the commands in the presently selected function menu. 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 [...]

4 - Front Panel Operation 36 Press this key to access the harmonic menu list Display Measurement <reading>A I:MAG: <index> current harmonic magnitude <reading> ° I:PHASE: <index> current harmonic phase <reading>V V:MAG: <index> voltage harmonic magnitude <reading> ° V:PHASE: <index> voltage harmonic[...]

Front Panel Operation - 4 37 Press this key to access the phase menu list. Display Command Function PHASE <value> Set immediate output phase ( φ ) PHASE:T <value> Set triggered output phase ( φ ) PHASE:M <char> Select the phase mode ( φ ) (FIXED, STEP, PULSE or LIST) Press this key to access the shape menu list. Display Command[...]

4 - Front Panel Operation 38 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[...]

Front Panel Operation - 4 39 Trigger and List Control Keys The Trigger Control key controls output transient triggers. The List key controls the generation of output 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 programmin[...]

4 - Front Panel Operation 40 Entry Keys Refer to the examples later in this chapter for more details on the use of these keys. - 3 2 1 0 . 78 9 4 56 ENTRY E Calib ration Enter Clear Entry Figure 4-4. Entry Keys These keys let you scroll through choices in a parameter list that apply to a specific command. Parameter lists are circular; you can retur[...]

Front Panel Operation - 4 41 Examples of Front Panel Programming You will find these examples on the following pages: 1 Setting the output voltage amplitude 2 Setting the output frequency 3 Setting the overcurrent protection feature 4 Generating step, pulse, and list transients 5 Programming trigger delays and phase synchronization 6 Programming sl[...]

4 - Front Panel Operation 42 Procedure for Three-Phase AC Sources If you have a three-phase ac source, you can set the rms voltage of all three phases identically, or set each one differently. This is controlled via the Phase Select Menu on the Function keypad. The following example shows how you can set the phase 1 output to 120 Vrms, phase 2 to 1[...]

Front Panel Operation - 4 43 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 Display You can set the frequency in the same way that you set the voltage: 1. On the Fun[...]

4 - Front Panel Operation 44 4 - Using Transient 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 [...]

Front Panel Operation - 4 45 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 rema[...]

4 - Front Panel Operation 46 List Transient 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 m[...]

Front Panel Operation - 4 47 6. Press ô 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 display. On the Entry keypad, press 1 6 0 and Enter . VOLT 0 160 7. Pressing the Enter key automatically advances to the step in the list[...]

4 - Front Panel Operation 48 Figure 4-7. Trigger Delays and Phase Synchronization Example Display j 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 . VOLT 1[...]

Front Panel Operation - 4 49 On three-phase ac sources , phase 1 is normally offset by 0 ° from the internal phase reference while phase 2 and phase 3 are offset by 240 ° and 120 ° respectively. Therefore, synchronized transient events will occur at the phase angle programmed for the phase 1 output, but at different phase angles on the phase 2 a[...]

4 - Front Panel Operation 50 6 - 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 oper[...]

Front Panel Operation - 4 51 Example Display j This example uses the immediate slew rate. First, access the Voltage menu and press ô until you access the mode command. On the Entry keypad, press ° to obtain FIXED. Press Enter . Access the voltage menu and press ô until you access the slew command. On the Entry keypad, press 5 0 Enter to program [...]

4 - Front Panel Operation 52 7 - Measuring Peak Inrush Current 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 wait for any input filter capacitors to discharge completely. This exampl[...]

Front Panel Operation - 4 53 8 - 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 p[...]

4 - Front Panel Operation 54 10 - Switching Between Single- and Three-phase Operation (Agilent 6834B only) When shipped from the factory, the Agilent 6834B ac source is configured for three-phase operation. You can configure the Agilent 6834B for single-phase operation. This increases the available output power for phase 1 from 1.5 kVA to 4.5 kVA. [...]

55 A Specifications Specifications Performance specifications are warranted over the ambient temperature range of 0 to 40 o C. Unless otherwise noted, specifications are per phase for a sinewave with a resistive load at an output frequency range of 45 Hz to 5 kHz (45 Hz-1 kHz, Agilent 6843A) after a 30-minute warmup. Table A-1. Performance Specific[...]

A - Specifications 56 Supplemental Characteristics Table A-2 lists the supplemental characteristics, which are not warranted but are descriptions of typical performance determined either by design or type testing. Table A-2. Supplemental Characteristics Parameter Agilent 6814B Agilent 6834B Agilent 6843A AC Input Voltage Range: 180 − 235 Vac (3-p[...]

Specifications A 57 Table A-2. Supplemental Characteristics (continued) Parameter Agilent 6814B Agilent 6834B Agilent 6843A INH/FLT Characteristics Maximum Ratings: 16.5 Vdc between INH terminals; FLT terminals; and from INH terminals to chassis ground INH Terminals: I ol = 1.25 mA max. V ol = 0.5 Vmax. FLT Terminals: V il = 0.8 V max. V ih = 2 V m[...]

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59 B Verification and Calibration Introduction This appendix includes verification and calibration procedures for the Agilent 6814B/6834B/6843A 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[...]

B - Verification and Calibration 60 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). Figure B-1. Verification & Calibration Test Setup Performing the Verification Tests The following procedures assume you understand how to operate the ac [...]

Verification and Calibration - B 61 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. Figure B-1 shows the setup. Measure the ac output voltage directly at the output term[...]

B - Verification and Calibration 62 Table B-2. Agilent 6814B/6834B/6843A Verification Test Record Model ________________ Report No.____________ Date_____________ Test Description Minimum Specification Recorded Results Maximum Specification Voltage Programming and Measurement Accuracy Low voltage (150 Vrms) Front Panel Measurement High voltage (300 [...]

Verification and Calibration - B 63 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 <value> Turns calibration mode on when the correct password value is entered. CAL OFF Turns calibration mode off CAL:LEV <char> Advance to nex[...]

B - Verification and Calibration 64 Calibrating and Entering Voltage Calibration Values Action Display 4. Connect the DVM (ac volts mode) directly to the ac source via the ratio transformer shown in Figure B-1. Do not connect the load resistor or current shunt. 5. Press Shift Calibration , scroll to CAL VOLT AC, and press Enter . CAL:VOLT:AC 6. Pre[...]

Verification and Calibration - B 65 Calibrating and Entering Current Calibration Values Action Display 20. Connect the appropriate current shunt and load resistor as shown in figure B- 1. Connect the DVM (ac rms mode) across the current shunt. If you are calibrating a 3-phase source , make sure that the default phase 1 ( φ 1) annunciator is lit. P[...]

B - Verification and Calibration 66 Calibrating the Output Impedance (Agilent 6843A only) NOTE: The output voltage and output current must be calibrated before the output impedance can be calibrated. Action Display 32. Connect only the output impedance resistor across the output of the ac source. Do not connect any other equipment. 33. Press Shift [...]

Verification and Calibration - B 67 Calibration Error Messages Errors that can occur during calibration are shown in the following table. Table B-3. GPIB Calibration Error Messages Error 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 C[...]

B - Verification and Calibration 68 Figure B-2. Calibration Program Listing (Sheet 1 of 2) 10 ! 20 ! AC Source calibration program Rev B.00.00 30 ! 40 ASSIGN @Ac TO 705 50 ! 60 PRINT TABXY(3,3),"This program will calibrate the 6814B/34B/43A AC Power Solutions." 70 PRINT TABXY(3,5),"Equipment requirements are: Agilent 3458A or equival[...]

Verification and Calibration - B 69 Figure B-2. Calibration Program Listing (Sheet 2 of 2) 700 PRINT TABXY(15,10),"CALIBRATING OVERVOLTAGE PROTECTION" 710 OUTPUT @Ac;"CAL:VOLT:PROT" 720 PRINT TABXY(30,15),"WAIT" 730 WAIT 30 740 OUTPUT @Ac;"CAL:SAVE" 750 OUTPUT @Ac;"CAL:STATE OFF" 760 CLEAR SCREEN 77[...]

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71 C 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 [...]

C - Error Messages 72 –171 Invalid expression –178 Expression data not allowed Execution Errors –2 00 through –2 99 (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[...]

Error Messages - C 73 41 Voltage selftest error, output 2 42 Voltage selftest error, output 3 43 Current selftest error, output 1 44 Current selftest error, output 2 45 Current selftest error, output 3 70 Fan voltage failure 80 Digital I/O selftest error Device-Dependent Errors 100 through 32767 (sets Standard Event Status Register bit #3) 200 Outg[...]

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75 Index —A— accessories, 10 airflow, 16 annunciators φ 1, 32 Addr, 32 Cal, 32 CC, 32 CV, 32 Dis, 32 Err, 32 OCP, 32 Prot, 32 Rmt, 32 Shift, 32 SRQ, 32 Tran, 32 Unr, 32 AWG ratings, 19 —C— cables, 10 calibration, 62 enable, 63 equipment, 59 error messages, 67 menu, 63 output impedance, 66 password, 66 program listing, 67 rms current, 65 sa[...]

Index 76 —M— manuals, 9, 15 Meter AC+DC, 32 meter display keys Harmonic, 35 Input, 35 Meter, 35 —N— non-volatile memory clearing, 53 storing, 33 —O— operating features, 11 options, 10 output characteristic, 12 connections, 19 connector, 15 rating, 12 setting output protection, 43 setting the amplitude, 41, 54 setting the frequency, 43 O[...]

Index 77 rms current accuracy, 61 setup, 60 test record, 62 verification tests, 25 voltage control, 12 —W— warranty, 2 Waveform generation, 50 wire current ratings, 19 wiring considerations, 19[...]

78 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 measurement sales representative. United St[...]

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 changed to GPIB.[...]