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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
Agilent Part No. 5962-0829 Printed in U.S.A.
Microfiche No 5962-0830 December, 1998
Update April 2000
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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 war
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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 ma
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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
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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: IEC 1010-1:1990+A1(1992) / EN 61
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Acoustic Noise Information Herstellerbescheinigung Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenläminformationsverordnung vom 18 Januar 1991. * Schalldruckpegel Lp <70 dB(A) * Am Arbeitsplatz * Normaler Betrieb * Nach EN 27779 (Typprüfung). 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 <70 dB(A) * At Operator Position * Normal Operation * Accor
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Table of Contents Warranty Information 2 Safety Summary 3 Declaration of Conformity 5 Acoustic Noise Information 6 Printing History 6 Table of Contents 7 1 GENERAL INFORMATION 11 Document Orientation 11 Earlier AC Source Models 12 Safety Considerations 12 Options and Parts 12 Description 13 Capabilities 14 Front Panel/Remote Operation 14 Steady-state Output Characteristic 15 Peak Current/Dynamic Power Capability 16 Peak Current Limit 16 Peak Inrush Example 16 RMS Current Limit Circuit 17 Voltage
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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 Meter Display Keys 41 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 Voltag
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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 75 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 C
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1 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 information ♦
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1 - General Information Earlier AC Source Models With the exception of some minor readback specification differences, information in this manual also applies to the following earlier ac source models: Information about this also applies to the following earlier current model models: Agilent 6811B Agilent 6811A AC Power Source/Analyzer Agilent 6812B Agilent 6812A AC Power Source/Analyzer Agilent 6841A Harmonic/Flicker Test System in normal mode Agilent 6813B Agilent 6813A AC Power Source/Analyzer
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General Information - 1 The following table lists some common user-replaceable parts: Table 1-2. Operator Replaceable Parts Item 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
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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. ♦ Sine, square, clipped sine, and user-definable waveforms. ♦ Programmable output impedance. ♦ Voltage and frequency slew
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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 s
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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)
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General Information - 1 ♦ as voltage increases, the I setting needs to be decreased. peak ♦ as frequency increases, the I setting can be increased. peak ♦ as load resistance decreases, the I setting needs to be decreased. peak Note that the purpose of programming the I current is to prevent the unit from activating its internal peak 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
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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 th
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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,
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