Agilent Technologies 6813B, 6811B, 6812B manual Trigger Connections, Digital Connections

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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 circuit 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 the ac source.

In example A, the INH input connects to a switch that shorts pin + to pin ⊥ 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 ⊥ and then clear the protection circuit. This can be done either from the front panel or over the GPIB/RS-232.

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Contents User’s Guide AC Power Solutions Agilent Models 6811B, 6812B, and 6813BCertification Warranty InformationGeneral Safety SummarySafety Symbols EMC DeclarationPrinting History Acoustic Noise InformationTable of Contents Performing the Verification Tests Performing the Calibration ProcedureEntry Keys Examples of Front Panel Programming IntroductionLine Voltage Conversion Error Number ListPage Document Orientation TopicLocation Options Safety ConsiderationsOptions and Parts Earlier AC Source ModelsDescription Operator Replaceable PartsAgilent Part Number Front Panel/Remote Operation CapabilitiesModel Description Steady-state Output Characteristic in real-time mode Steady-state Output CharacteristicTypical Peak Current Output Capacities Peak Current/Dynamic Power CapabilityPeak Current Limit Peak Inrush ExampleCapacitance in μF 127 254 Ipeak settingReal Time Regulation RMS Current Limit CircuitVoltage Regulation Output ImpedanceOutput Coupling Page Items Supplied CleaningInspection Damage Packaging MaterialNot block the fan exhaust at the rear of the unit LocationBench Operation Rack MountingInstalling the Power Cord Input ConnectionsInput Source and Line Fuse Output Connections Connecting the Power CordCurrent Ratings Wire ConsiderationsRemote Sense Connections Voltage DropsRemote Sense Connections Trigger Connections Digital ConnectionsRemote Sensing and OVP Considerations Controller Connections Gpib ConnectorRS-232 Data Format Interface CommandsRS-232 Connector RS-232 InterfaceNull Modem Interface Lines Response Data Terminator Hardware HandshakePreliminary Checkout IntroductionCheckout Procedure Using the KeypadPress 1, 6, 0, Enter Press 1, 2, 0, EnterPress Output On/Off Press ProtectCase of Trouble Error MessagesSelftest Errors Power-On Selftest ErrorsMay appear at runtime Runtime Error MessagesLine Fuse IndicatesPage Front Panel, Overall View Front Panel DescriptionAC+DC System Keys Dis lay Command FunctionFunction Keys Immediate Action KeysScrolling Keys Display Display Command FunctionMeter Display Keys Display MeasurementList Output Control KeysRST Protection and Status Control Keys ProtclearCLS Abort Trigger and List Control KeysInitimmed IMMThrough Are used for entering numeric values Is the decimal Entry KeysSetting the Output Voltage Amplitude Examples of Front Panel ProgrammingSet the output to 120 V rms as follows Action Setting the Output FrequencySetting the DC Offset To verify the output, use the meter menuClearing Protection Conditions Setting a Protection FeatureOvercurrent protection feature as follows Bit Number Bit WeightPulse Using Transient Voltage ModesVoltm Step Step TransientPulse Transient VolttDcycle List TransientVoltm Pulse WidthVolt EOL Step Auto Trigger Delays and Phase SynchronizationVoltm Fixed List Count Dwel Dwel EOL VoltSyncsour Phase Example DisplaySyncphas Initimmed Programming Slew Rates Using Slew Rates to Generate WaveformsSlewt Voltm FixedSlew Step SlewmCurrpeak Syncsour Phase SyncphasMeasuring Peak Inrush Current CurrlevAction Display To set the Gpib address, proceed as follows Setting the Gpib Address and RS-232 ParametersTo configure the RS-232 interface, proceed as follows Saving and Recalling Operating StatesTable A-1. Performance Specifications1 SpecificationsTable A-1. Performance Specifications Table A-2. Supplemental Characteristics Supplemental CharacteristicsTrig Out HC TTL output Trig In 10k pullup Table A-3. Operation Below 45 Hz Operation Below 45 HzPage Equipment Required Verification and CalibrationTest Setup Table B-1. Equipment RequiredRecommended Model Action Normal Result Turn-On Checkout ProcedurePerforming the Verification Tests AC Voltage Programming and Measurement AccuracyVolt 50, Currrange LOW, Currlev DC Voltage Programming and Measurement AccuracyRMS Current Accuracy Test Volt 0, Outpcoup DC, OffsetRMS Current Measurement Accuracy Table B-2. Agilent 6811B Verification Test RecordTable B-3. Agilent 6812B Verification Test Record DC Programming and Measurement AccuracyTable B-4. Agilent 6813B Verification Test Record Table B-3Front Panel Calibration Menu Performing the Calibration ProcedureEnable Calibration Mode Front Panel CalibrationCalibrating and Entering Voltage Offset Values Calibrating and Entering DC Voltage Gain Values Calibrating and Entering AC rms Voltage Gain ValuesCallev P4 Calibrating and Entering rms Current Values Calibrating the OVP Trip PointOFF Calibrating and Entering rms Current Measurement ValuesCalibrating the Output Impedance Saving the Calibration ConstantsCalibration Over the Gpib Changing the Calibration PasswordCalibration Error Messages Table B-5. Gpib Calibration Error MessagesFigure B-2. Calibration Program Listing Sheet 1 Figure B-2. Calibration Program Listing Sheet 2 Figure B-2. Calibration Program Listing Sheet 3 Page Table C-1. Error Numbers Error Number ListError Messages Error Messages C Page Check the Line Jumpers all Models Check the Jumper Wire Model Agilent 6811B/6812B onlyCheck the Power Transformer Connector all Models Open the UnitFigure D-1. Line Voltage Conversion Components Close the UnitIndex Index Index Japan United States Latin AmericaCanada Australia/New Zealand Europe Asia PacificManual Updates
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