Agilent Technologies 6814B, 6834B, 6843A Measuring Peak Inrush Current, Range, Currpeak, Pk Nr

Page 52

4 - Front Panel Operation

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 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.

 

Action

Display

1.

Set the immediate voltage to 0. Press Voltage, then press 0 and Enter.

VOLT

0

2.

Set the triggered voltage to 120 V rms. In the Voltage menu, press to

VOLT:T

120

 

access the triggered voltage command. Then press 1 2 0 Enter.

 

 

3.

Set the voltage mode to step. In the Voltage menu, press to access the

VOLT:M

STEP

 

mode command. Press ° to scroll to STEP and press Enter.

 

 

4.

Make sure the unit is operating in the low voltage range. (The low voltage

RANGE

150

 

range has twice the output current rating of the high voltage range.) In the

 

 

 

Voltage menu, press to access the range command. If necessary, press ° to

 

 

 

set the range to 150 and press Enter.

 

 

5.

Make sure the triggered voltage slew rate is set to the fastest possible speed.

SLEW:T 9.9000+E37

 

In the Voltage menu, access the triggered slew command. If necessary, reset

 

 

 

the slew rate to a faster speed.

 

 

6.

Make sure the peak current and rms current limits are set to high values. In the

CURR:LEV 6.5

 

Current menu, access the rms current limit and then the peak current limit

CURR:PEAK 40

 

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)

 

 

7.Synchronize the trigger source with a reference phase angle. In the Trigger Control menu, press to access the sync source command. Press ° to obtain PHASE and press Enter.

8.Set the reference phase angle to 75°. In the Trigger Control menu, press to access the sync phase command. Then press 7 5 Enter.

SYNC:SOUR PHASE

SYNC:PHAS 75

9.

Initiate (or enable) the unit for one immediate trigger from the front panel.

INIT:IMMED

 

Press Trigger Control and Enter.

 

 

10.

Set the meter function to measure nonrepetitive peak inrush current. In the

0 A

PK NR

 

Meter menu, press to access the peak inrush current display.

 

 

11.

Enable the output by pressing Output On/Off.

0 V

60 HZ

12.

Send the trigger to step the output from 0 V to 120 V. Press Shift Trigger.

48 A

PK NR

 

The inrush current is displayed on the Meter.

 

 

On three-phase ac sources you can only return the peak inrush current from the selected phase because the front panel can only display one phase at a time. Refer to the ac source Programming Guide on how to return simultaneous measurements from all three phases.

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Contents AC Power Solutions Agilent Models 6814B, 6834B, and 6843A User’s GuideWarranty Information CertificationSafety Summary GeneralSafety Symbols Declaration EMCAcoustic Noise Information Printing HistoryTable of Contents Specifications Supplemental Characteristics Performing the Calibration ProcedureError Number List Entry Keys Examples of Front Panel ProgrammingTopic Document OrientationLocation Safety Considerations Options, Accessories, and User Replaceable PartsOption Description Agilent Part NumberCapabilities DescriptionModel Description Front Panel/Remote Operation Output CharacteristicRanges AC Source Output Characteristic in real-time mode Output VA CapabilityPage Cleaning InspectionDamage Packaging Material Items SuppliedLocation Bench OperationRack Mounting Not block the fan exhaust at the rear of the unitInput Connections Installing the Power CordInput Source and Line Fuse Output Connections Output ConnectionsWire Considerations Voltage DropsCurrent Ratings Ampacity and Resistance of Stranded Copper ConductorsRemote Sense Connections Remote Sense ConnectionsTrigger Connections Digital ConnectionsOVP Considerations Output RatingGpib Connector Controller ConnectionsInterface Commands RS-232 ConnectorRS-232 Interface RS-232 Data FormatHardware Handshake Null Modem Interface Lines Response Data TerminatorIntroduction Preliminary CheckoutUsing the Keypad Checkout ProcedureVolt Procedure Display ExplanationProtclear Voltprot CurrlevCurrprot Currprot OFFCase of Trouble Error MessagesLine Fuse Page Front Panel Description Front Panel, Overall ViewAC+DC Display Command Function System KeysFunction Keys Annunciator On Phase SelectedImmediate Action Keys Scrolling Keys Meter Display KeysDisplay Measurement KBESSEL, RectOutput Control Keys DisplayRST Protection and Status Control Keys CLSTrigger and List Control Keys InitimmedIMM AbortEntry Keys Through Are used for entering numeric values Is the decimalSetting the Output Voltage Amplitude Procedure for Single-Phase AC SourcesExamples of Front Panel Programming Set the output to 120 V rms as followsProcedure for Three-Phase AC Sources Phase 3 to 235 VrmsAction Display To verify the output, you can measure it as followsSetting a Protection Feature Setting the Output FrequencyOvercurrent protection feature as follows Using Transient Voltage Modes Step TransientVoltt Voltm StepPulse Transient Voltm PulseWidth DcycleAction List TransientVoltm Fixed Voltm List Count Trigger Delays and Phase Synchronization Volt EOL Step AutoExample Display Syncsour PhaseSyncphas Initimmed Voltm Step Syncsour Phase Syncphas Initimmed ExampleUsing Slew Rates to Generate Waveforms Programming Slew RatesVoltm Fixed SlewStep Slewm SlewtSyncsour Phase Syncphas Measuring Peak Inrush CurrentRange CurrpeakSetting the Gpib Address and RS-232 Parameters To configure the RS-232 interface, proceed as followsSaving and Recalling Operating States Action Display To set the Gpib address, proceed as followsAddress Noutputs Table A-1. Performance Specifications1 SpecificationsAgilent 6814B Agilent 6834B Agilent 6843A Supplemental Characteristics Table A-2. Supplemental CharacteristicsSpecifications a Page Equipment Required CharacteristicsRecommended Model Turn-On Checkout Procedure Test SetupPerforming the Verification Tests RMS Current Readback Accuracy Voltage Programming and Measurement AccuracyAction Normal Result Performing the Calibration Procedure Agilent 6814B Current Measurement AccuracyAgilent 6834B Current Measurement Accuracy Agilent 6843A Current Measurement AccuracyFront Panel Calibration Enable Calibration ModeFront Panel Calibration Menu Calibrating and Entering Voltage Calibration Values Calibrating the OVP trip pointCalibrating and Entering Current Calibration Values Changing the Calibration Password Calibrating the Output Impedance Agilent 6843A onlySaving the Calibration Constants CalpassCalibration Error Messages Table B-3. Gpib Calibration Error MessagesCalibration Over the Gpib Agilent Calibration Program ListingFigure B-2. Calibration Program Listing Sheet 1 Figure B-2. Calibration Program Listing Sheet 2 Page Error Number List Table C-1. Error NumbersError Messages Error Messages C Page Index Index Index United States Latin America Canada Australia/New ZealandEurope Asia Pacific JapanManual Updates
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6834B, 6843A, 6814B specifications

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