Agilent Technologies 5964-8134 manual Programming Example, UPS Transfer Time Measurement

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Programming Example

UPS Transfer Time Measurement

The following programming example illustrates how to use the ac source with the Dual Power Analyzer Option 020/022 to measure transfer time on a UPS. Transfer time is defined as the time it takes a UPS to go from online-operation to battery-backup operation when the ac line fails.

This example starts with the ac source output voltage (UPS input voltage) at 120 Vac. The UPS output voltage is connected to a load and to the Power Analyzer input. The ac source output turns on at 120 Vac, then does a 50 ms dropout to 0 volts. Both the dropout and measurements are triggered at the same time. The FETC:TVOLT:ABS? command is then used to return the transfer time, here defined as the time between the start of the dropout and the time when the absolute value of the UPS output voltage exceeds 50 volts for at least 0.001 seconds.

100 ASSIGN @Ps TO 705 ! AC SOURCE IS AT ADDRESS 5, INTERFACE 700

110!

120!

130

OUTPUT

@Ps;"*RST"

! BEGIN FROM A KNOWN STARTING POINT

WITH RESET

140

OUTPUT

@Ps;"VOLT

120"

! SET INITIAL INPUT VOLTAGE

FOR

UPS

TO 120 VAC

150

OUTPUT

@Ps;"OUTP

ON"

!

TURNS AC SOURCE OUTPUT ON

AT 120

VAC

160

WAIT 2

 

 

!

MAKE SURE UPS OUTPUT HAS TIME

TO

SETTLE

170!

180!

190OUTPUT @Ps;"VOLT:MODE PULS" ! SET UP PULSE MODE FOR AC SOURCE OUTPUT

200OUTPUT @Ps;"PULS:WIDT 0.05" ! SET PULSE WIDTH TO 50 MILLISECONDS

210OUTPUT @Ps;"VOLT:TRIG 0" ! SET PULSED (TRIGGERED) VALUE TO 0 VOLTS

220!

230!

240OUTPUT @Ps;"TRIG:SYNC:SOUR PHAS" ! SETS DROPOUT SYNCHRONIZATION TO PHASE

250OUTPUT @Ps;"TRIG:SYNC:PHAS 90" ! SETS DROPOUT START PHASE TO 90 DEGREES

260

OUTPUT @Ps;"TRIG:SOUR BUS"

!

SETS DROPOUT TRIGGER AND MEASUREMENT

270

 

!

TRIGGER SOURCE TO BUS TRIGGER

280!

290!

300OUTPUT @Ps;"OUTP:TTLT:SOUR BOT" ! SETS SIGNAL TRIGGER SOURCE TO BEGINNING

310

 

 

! OF TRANSIENT (BOT)

320

OUTPUT

@Ps;"OUTP:TTLT:STAT ON"

! ENABLES

TRIGGER OUTPUT SIGNAL

330

OUTPUT

@Ps;"TRIG:ACQ:SOUR TTLT"

!

SETS MEASUREMENT TRIGGER SOURCE TO

340

 

 

!

TRIGGER

OUTPUT SIGNAL

350!

360!

370OUTPUT @Ps;"INIT:IMM:SEQ1" ! ARMS THE PULSED DROPOUT TO WAIT FOR TRIGGER

380OUTPUT @Ps;"INIT:IMM:SEQ3" ! ARMS MEASUREMENT PROCESS TO WAIT FOR TRIGGER

390

OUTPUT @Ps;"TRIG:IMM"

! TRIGGERS PULSED VOLTAGE DROPOUT TO 0

VOLTS

400

 

! AND STARTS THE MEASUREMENT PROCESS

 

410

OUTPUT @Ps;"SENS:NSEL 2"

! SELECTS POWER ANALYZER INPUT FOR MEASUREMENTS

420

OUTPUT @Ps;"FETC:TVOLT:ABS? 50, 0, .001"

! FETCHES TRANSFER TIME

430

ENTER @Ps;A

! RETURNS THE TRANSFER TIME MEASUREMENT

 

440

PRINT A

! PRINTS THE TRANSFER TIME MEASUREMENT

 

450

END

 

 

 

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Contents Addendum Contents Agilent Dual Power Analyzer Description Agilent Option 022 DescriptionScpi Programming Commands Additions Front Panel Menus AdditionsInstallation Power Analyzer input. Connector plug is removableTurn the unit off before connecting any wires Rear Panel ConnectionsMeasurement Cable Connections External Shunt Line and Load Connections Check the External Current Shunt Setting Setting the Output Frequency ModulationFront Panel Programming To set the output frequency modulationUsing the Front Panel Display with the Power Analyzer Input Making Power Analyzer Input MeasurementsTo select the measurement source Use the Input menu for selecting the frequency sourceAdditional Measurement Commands MEASureTVOLt? FETChTVOLt?MEASureTVOLtABSolute? FETChTVOLtABSolute? MEASureVOLTageRANKed? FETChVOLTageRANKed?Query Syntax Parameters Examples Parameters ExamplesSENSeNSELect Additional Sense CommandsSENSeFREQuencySOURce Additional Frequency Modulation Commands FMDEViationFMFREQuency RST Value UnitAdditional Calibration Commands Command Syntax Parameters ExamplesCALibrateVOLTageEXTernal CALibrateCURRentEXTernalBehavior Differences of Existing Scpi Commands Programming Example UPS Transfer Time MeasurementMaking a Measurement Using the Power Analyzer Input with the GUIPrograms Agilent AC Source AC Source GUI Making a Voltage Phase Difference Measurement Performing a Transfer Time Test Modulating the Output FrequencyPower Analyzer Input Specifications Table A-1. Performance SpecificationsTable A-2. Supplemental Characteristics Equipment Required Verification and Calibration for Option 020/022Table B-1. Equipment Required Verification Procedure Test Set upPower Analyzer Voltage Measurement Accuracy Power Analyzer Current Measurement AccuracyCalibration Procedure Enable Calibration ModeDisplay Command Function Summary of Front Panel Calibration MenuCAL Save

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