Agilent Technologies n3300a DC Measurements, RMS Measurements, Minimum and Maximum Measurements

Page 34

General Information - 2

As shipped from the factory, front panel measurements for input voltage and current are calculated from a total of 1000 readings taken at a 10 microsecond sampling rate. There are no trigger controls for front panel measurements. However, you can program both the sampling rate and the number of data points in each front panel measurement using commands in the Sense menu. With this flexibility, measurement accuracy can be improved for waveforms with frequencies as low as several Hertz. The sample buffer size may be varied from 1 to 4096 data points. The sampling rate may be varied from 0.000001 seconds to 0.032 seconds. Values are rounded to the nearest 10-microsecond interval.

DC Measurements

DC voltage and current is measured by acquiring a number of readings at the selected time interval, applying a windowing function to the readings, and averaging the readings. Windowing is a signal conditioning process that reduces the error in dc measurements made in the presence of periodic signals such as line ripple. At power-on and after a *RST command, the interval and number of sample points used for the measurement acquisition is set. Ripple rejection is a function of the number of cycles of the ripple frequency contained in the acquisition window. More cycles in the acquisition window results in better ripple rejection. In addition, the speed of the measurement can be increased by reducing the number of sample points.

To measure the dc input voltage or current using the front panel, press the Meter key. The display indicates the present voltage and current reading. Scroll to the appropriate measurement. To measure the voltage or current over the GPIB, use the MEAS:VOLT? or MEAS:CURR? command.

RMS Measurements

To measure the rms of the input voltage or current, press the Meter key and scroll to the V RMS or A RMS menu commands. To measure the rms voltage or current over the GPIB, use MEAS:VOLT:ACDC? or

MEAS:CURR:ACDC?

This returns the total rms measurement, including the dc portion.

Minimum and Maximum Measurements

To measure the maximum or minimum voltage or current, press the Meter key and scroll to the

V MAX, V MIN, A MAX, or A MIN menu commands. Minimum returns the lowest value in the array; maximum returns the highest value in the array. To measure the maximum/minimum voltage or current over the GPIB, use MEAS:VOLT:MAX?/MEAS:VOLT:MIN? or MEAS:CURR:MAX?/MEAS:CURR:MIN?

Power Measurements

To measure the average, maximum, or minimum power, press the Meter key and scroll to the WATTS, W MAX, or W MIN menu commands. Power is calculated from the latest voltage and current measurements. Use MEASure:POWer? to measure power over the GPIB.

Measurement Ranges

The electronic load has two measurement ranges. The commands that control the measurement ranges are located in the front panel Sense menu. To change measurement ranges, scroll to the S:C:RNG or the S:V:RNG commands and enter a value that falls within the range that you wish to set. The electronic load will pick the range with the best resolution for that value. The corresponding SCPI range commands are: SENS:CURR:RANG and SENS:VOLT:RANG.

35

Page 33 Page 35
Image 34
Page 33 Page 35
Contents USER’S Guide Warranty Information CertificationSafety Summary GeneralSafety Symbols Declaration Declaration of ConformityAcoustic Noise Information Printing HistoryTable of Contents TURN-ON Checkout 101 Quick Reference Front Panel -At a GlanceRear Panel At a Glance Instrument ConfigurationQuick Reference Front Panel Number Entry Use the Function keys and Entry keys to enter a new valueFront Panel Annunciators Immediate Action KeysFront Panel Menus At a Glance Quick Reference Front Panel Menus VoltageScpi Programming Commands At a Glance Complete description of all programming commandsQuick Reference Scpi Commands Document Orientation Task Where to find informationGetting Started Map Options and Accessories Safety ConsiderationsDescription Front Panel Controls Features and CapabilitiesRemote Programming Operating Modes Constant Current CC ModeImmediate Current Level Transient Current Level Constant Resistance CR ModeGeneral Information Triggered Current Level Software Current LimitTriggered Resistance Level Constant Voltage CV ModeTransient Resistance Level Triggered Voltage Level Transient Voltage LevelPulsed Transient Operation Transient OperationContinuous Transient Operation Toggled Transient OperationTriggered Operation Triggering a preset levelList Operation Triggering a transient pulseSlew Rate and Minimum Transition Time Risetime Transition LimitationTransition Time Slew Rate Examples Input Control Protection FeaturesResetting Latched Protection Short On/OffGeneral Information Overvoltage OverpowerOvertemperature OvercurrentReverse Voltage Reading Remote Programming ErrorsStatus Reporting Remote Sensing Saving and Recalling SettingsExternal Control Signals Monitor OutputsInput Measurements FaultPort On/Off RMS Measurements Power MeasurementsDC Measurements Minimum and Maximum MeasurementsDamage Packaging Material CleaningInspection Items SuppliedProcedure Installing the ModulesInstallation Location Channel Number3A. N3300A Outline Diagram Rack Mounting Bench OperationDo not block the fan exhaust at the rear of the unit Manually-Tightened Connectors Power CordInput Connections 8mm Screw Terminal Connector option UJ1 6a. Manual ConnectorWire Considerations Wire Size Ampacity Stranded Copper Wire Ampere CapacityMaximum Wire Lengths to Limit Voltage Drops A11 and A10 Control ConnectorA1-A3 +S and -SSense Switch Trigger and Digital ConnectionsGpib Interface Computer ConnectionsRS-232 Interface Remote Sense Connections Application ConnectionsLocal Sense Connections Parallel Connections11. Remote Sensing Low Voltage Operation 13. Zero Volt LoadingIntroduction Checkout ProcedureCheckout Programming Values Selftest Error Codes Error MessagesSelftest Errors Case of TroubleFront Panel Description Front Panel, Overall ViewFront Panel Operation Display Command Function System KeysFunction keys Immediate Action KeysMetering Keys Scrolling KeysDisplay Measurement Input Control Keys InpshorTrigger Control Keys Transient Control KeysList Control Keys Entry Keys Entry KeysExamples of Front Panel Programming Using the Front Panel DisplaySet the constant current mode input Programming Constant Current, Voltage and Resistance ModesSet the constant resistance mode input Set the constant voltage mode inputSet transient operation for Continuous mode Programming Transient OperationSet transient operation for Pulse mode Set transient operation for Toggled modeProgramming Lists Tmode ToggList Sequence Making Basic Front Panel Measurements Querying and Clearing Output Protection and ErrorsQuery and Clear Errors as follows Use the Meter menu for making front panel measurementsSet the Gpib address as follows Setting the Gpib AddressStoring and Recalling Instrument States Save an instrument state in location 0 as followsSpecifications Specifications Specifications a Table A-2. Supplemental CharacteristicsSpecifications N3302A N3303A N3304A N3305A N3306APerformance Test and Calibration Procedures Equipment RequiredImon Zero Verification CC Mode TestsPerformance Tests Performance Test and CalibrationPerformance Test and Calibration B CV Mode TestsCC Mode Regulation Test Voltage Programming and Measurement Accuracy TestCV Mode Regulation Test Resistance Range 1 Programming Accuracy CR Mode TestsResistance Range 2 Programming Accuracy Resistance Range 3 Programming Accuracy Resistance Range 4 Programming AccuracyTransient Generator Mode Tests Frequency and Duty Cycle AccuracyPerformance Test and Calibration Pulse Width Accuracy Output 705TRAN on Output 705TRIGIMMAgilent N3302A Verification Test Record Agilent N3303A Verification Test Record Agilent N3304A Verification Test Record Agilent N3305A Verification Test Record Agilent N3306A Verification Test Record Calibration Figure B-3. Voltage Calibration Calibration Table B-2 Variables and Power Source SettingsParameters Calibrated IMON, Iprog and Current Calibration Program Performance Test and Calibration Wait Performance Test and Calibration Voltage Calibration Program Print TABXY9,15CALIBRATING High Voltage RangePerformance Test and Calibration Resistance Calibration Program Calibrating Range Performance Test and Calibration B 100 Index 101Index 102103 Europe Asia Pacific United States Latin AmericaCanada Australia/New Zealand JapanManual Updates
Top Page Image Contents