Agilent Technologies 5964-8134 manuale d’uso

ADDENDUM to the A gilent 6811B, 6812B, and 6813B User’ s Guide and Programming Guide for the Dual Pow er A naly zer Option 020/022 Agilent P/N 5964-8134 Printed in U.S.A. Microf iche No 5964-8135 May , 2000[...]

2 Contents Agilent Dual Power Analyzer D escription 3 Rear Panel Connecti ons 5 Installation 5 Front Panel Programming 8 Additional Measurement Commands 10 Additional Sense Commands 12 Additional Frequency Modulation Comma nds 13 Additional Calibration Commands 14 Behavior Diff erences of Existing SCPI Commands 15 Programming Example 16 Using the P[...]

3 A gilent Dual Pow er A naly zer Description The Agilent Technologies D ual Power Analyz er Option 020 is available on the following ac sources: Agilent 6811B AC Power Source (375VA) Agilent 6812B AC Power Source (750VA) Agilent 6813B AC Power Source (1750VA) Agilent 6813B Option 019 AC Power Source (2000VA) Option 020 consists of an additional Po[...]

4 Front Panel Menus - Additions The Power Analy zer input uses the same front panel m enu comm ands that are used to measure the Main Output of the ac source. These are docum ented in the ac source User’ s Guide. The following m enu comm ands have been added to let you access the Pow er Analyzer input, control the output frequency modulation, and[...]

5 Rear Panel Connections Power Analyzer input. Connector plug is remo vable. L IN E R A T IN G HP-IB F L T I N H ++ - _ _ C O M _ _ C O M O 1 _ O 1 _ SENSE W A R N IN G 300 V A C M A X T O _ _ _ R S 2 3 2 L 2( N ) L 1 O P T I O N S C A U T IO N W A R N I N G TRIGGER O U T 1 I N 1 . . . . . . . . . LO HI LO HI V SENSE I SENSE Rear Panel, Overall Vie[...]

6 Measurement Cable Connections Voltage Sensing at a Location Other than the External Current Shunt You may also need to open up the cable connector if you need to voltag e sense at a point other than at the external current shunt. You m ust use your own sense cable to m ake the voltage sense connections. Please completely remov e the voltage sense[...]

7 External Shunt Line and Load Connections The Agilent supplied current shunt has both input (line) and output (load) connectors. The customer m ust supply the cables to connect the ac lines to and from the external current shunt. Agilent supplies one hooded cable cover for the input of the ac source and two hooded cable cov ers for the shunt. All [...]

8 Check the External Current Shunt Setting After you hav e completed your cable connections, you can turn on and check out the ac source as described in the Turn-On C heckout chapter in the ac source User’ s Guide. One additional step in checking out a unit with Option 020/022 installed, is to make sure that the correct shunt v alue has been ente[...]

9 Using the Front Panel Display w ith the Power Analy zer Input To select the measurement source: Action Display Press Me te r to return the display to Meter mode. Press Phase Select at any tim e to toggle between the Main Output and the Power Analy zer input. T he left-most digit of the front panel display will indicate either " φ 1" fo[...]

10 A dditional Measurement Commands The following additional m easurement com mands are provided with the A gilent Dual Power An alyzer Option 020/022. These m easurement comm ands are optimiz ed for use in specific applications such as evaluating uninterruptible power supplies. In this application the new com mands can be used to m easure transfer[...]

11 MEASure:TVOLt:A BSolute? FETCh:TVOLt: A BSolute? Returns the tim e at which the absolute value of the measured v oltage first exceeds level , with the following qualifications: The behavior of the sig nal before start_ time is ignored, and the absolute value of the voltag e must rem ain above level for at least the specified min_ pulse_ width . [...]

12 A dditional Sense Commands The following additional sense com mands are provided w ith the Agilent Dual Power A nalyzer Option 020/022. These comm ands let you select a measurem ent source and the frequency m easurement channel for the Power Analyz er input. SENSe:NSELect Selects the m easurement source that will return data when a query is sent[...]

13 A dditional Frequency Modulation Commands The following SCPI commands are used to prog ram the output frequency of the ac source. These comm ands apply only to the Main O utput of the ac source and do not affect the measurem ent capability of the unit. These comm ands are only provided with the A gilent Dual Power An alyzer Option 020/022. FM Tu[...]

14 A dditional Calibration Commands The following SCPI commands are used to calibrate the Power Analy zer input and external current shunt: CA Librate:VOLTage: EXTernal In itiates calibration of the external voltage m easurement. Command Syntax CALibrate:VOLTage:EXTernal Parameters None Examples CAL:VOLT:EXT CA Librate:CURRent: EXTernal Initiates c[...]

15 Behav ior Differences of Existing SCPI Commands This section documents the behav ior differences of existing SCPI com mands wh en the Power Analyzer input is selected or is active. MEA Sure | FETCh All standard ac source MEASure or FETCh functions are av ailable for the Main Output of the ac source as well as the Power Analyzer input. The SENSe:[...]

16 Programming Example UPS Transfer Time Measurement The following prog ramm ing example illustrates how to use the ac source w ith the Dual Power Analy zer Option 020/022 to m easure transfer time on a UPS. Transfer time is defined as the tim e it takes a UPS to go from online-operation to battery -backup operation when the ac line fails. This exa[...]

17 Using the Pow er A naly z er Input w ith the GUI The Agilent AC Source Graphical User Interface (G UI) is an easy to use soft front panel for the A gilent 6800-series AC Power Source/Analy zers. It is supplied with y our ac source. With it, you can also control the Power Analyz er input on the back of the unit. Instructions to install and run th[...]

18 If y ou have both the Main Output and the Power Analyzer input display ed, the Main window should display both wav eforms, as illustrated in the following screen shot. Making a Voltage Phase Difference M easurement The voltag e phase difference measures the phase difference between the output of the ac source and the output of a UPS after ac pow[...]

19 In the dialog box that appears on the screen, enter values for the indicated param eters. T he test uses these parameters to m ake the m easurement. For a detailed explanation of the Voltage Phase Difference parameters refer to the online help by pressing the F1 key . When you are ready to make the m easurement, press Measure . Performing a Tran[...]

20 Pow er A naly zer Input Specifications Table A-1 lists the specifications of the Agilent Dual Power Analy zer Option 020/022. Performance specifications are warranted over the am bient temperature rang e of 0 to 40 o C. Unless otherwise noted, specifications are for a sinewave w ith a resistive load at a frequency range of 45 H z to 1 kHz , with[...]

21 Table A -2. Suppl ement al Charact eristics Isolatio n t o Ground: 300 Vrms /425 Vdc Measurement Ranges AC Voltage: DC Voltage: Current: 0 − 300 Vrms ± 425 V ± 80 A p eak (high r ange) ± 8 A peak (l ow rang e) 13 A r ms m ax. continuous Average Measurement Resolution rm s Voltage: rm s Current: 10 mV 2 mA THD (for a fundamental amplitude ?[...]

22 Verification and Calibration for Option 020/022 This section includes verification and calibration procedures for the Agilent Dual Power Analy zer Option 020/022. Add these procedures to those described in Appendix B of the AC Source User’ s Guide. The verification procedures do not check all the operating parameters, but verify that the ac so[...]

23 Verification Procedure The following v erification procedures assume you understand how to operate the ac source from the front panel as explained in chapter 4. Perform the following tests for operation verification in the order indicated. 1. Turn-On Check out 2. Voltage Measurem ent Accuracy 3. Current Measurem ent Accuracy NOTE: The ac source [...]

24 Power Analy zer Voltage Measurement Accuracy This test verifies the accuracy of the Pow er Analyzer v oltage measurem ents. The Phase 2 annunciator on the left side of the display, m ust be on for the front panel to display Power Analy zer input measurem ents. Figure B- 1A shows the setup. Measure the ac output voltag e directly at the output te[...]

25 Calibration Procedure Table B-1 lists the equipm ent required for calibration. Figure B- 1 shows the test setup. T he following procedures assume y ou understand how to operate front panel keys (see chapter 4). WARNING LETHAL VOLTAGES . Ac sources can supply 425 V peak at their output. DEATH on contact may result if the output terminals or circu[...]

26 Calibrating and Entering Power Analy zer Voltage Calibration Values Action Display 4. Con nect an Ag ilent 3458A DVM (i n syn chronous ac v olts mode) t o the ac source output terminals. Short the Power Analy zer voltage terminals (V SENSE) to ensure n o dc offset error. 5. Press Shift Calibration , scroll to CAL VOLT EXT , and pres s Enter . CA[...]