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HP 6811B User Manual

Hp dual power analyzer.
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HP Model 6811B, 6812B, 6813B User's Guide and
HP Model 6811B, 6812B, 6813B Programming Guide
HP Dual Power Analyzer (Option 020 or 022)
HP Part No. 5964-8134
Microfiche No 5964-8135
to the
Printed in U.S.A.
June, 1999


Table of Contents

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   Summary of Contents for HP 6811B

  • Page 1 ADDENDUM to the HP Model 6811B, 6812B, 6813B User’s Guide and HP Model 6811B, 6812B, 6813B Programming Guide HP Dual Power Analyzer (Option 020 or 022) HP Part No. 5964-8134 Printed in U.S.A. Microfiche No 5964-8135 June, 1999...
  • Page 2: Table Of Contents

    Contents HP Dual Power Analyzer Description Rear Panel Connections Installation Front Panel Programming Additional Measurement Commands Additional Sense Commands Additional Frequency Modulation Commands Additional Calibration Commands Behavior Differences of Existing SCPI Commands Programming Example Using the Power Analyzer Input with the GUI...
  • Page 3: Hp Dual Power Analyzer Description

    HP Option 022 Description Option 022 is simply an HP 6813B Option 019 AC Power Source combined with an HP Dual Power Analyzer (Option 020). All of the Option 020 information in this document also applies to units that are...
  • Page 4 Front Panel Menus - Additions The Power Analyzer input uses the same front panel menu commands that are used to measure the Main Output of the ac source. These are documented in the ac source User’s Guide. The following menu commands have been added to let you access the Power Analyzer input, control the output frequency ô...
  • Page 5: Rear Panel Connections

    If the HP-supplied cable is too short, you may open the cable ends and replace the wiring in the cable with longer wires. Install the new cable in the same way as the original cable. The cable connectors accepts wire sizes from AWG 22 to AWG 12.
  • Page 6 You must use your own sense cable to make the voltage sense connections. Please completely remove the voltage sense wires from the HP-supplied measurement cable if you are using your own remote voltage sense cable. Disconnect the voltage sense wires from both cable connectors.
  • Page 7 The HP-supplied current shunt has both input (line) and output (load) connectors. The customer must supply the cables to connect the ac lines to and from the external current shunt. HP supplies one hooded cable cover for the input of the ac source and two hooded cable covers for the shunt. All three of these covers are assembled and installed in the same way.
  • Page 8: Front Panel Programming

    Check the External Current Shunt Setting After you have completed your cable connections, you can turn on and check out the ac source as described in the Turn-On Checkout 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 value has been entered in the unit.
  • Page 9 Using the Front Panel Display with the Power Analyzer Input To select the measurement source: Action Display φ Press Meter to return the display to Meter mode. Press Phase Select at any time to 115V 60Hz toggle between the Main Output and the Power Analyzer input. The left-most digit of the front panel display will indicate either "φ1"...
  • Page 10: Additional Measurement Commands

    Additional Measurement Commands The following additional measurement commands are provided with the HP Dual Power Analyzer (Option 020/022). These measurement commands are optimized for use in specific applications such as evaluating uninterruptible power supplies. In this application the new commands can be used to measure transfer time, peak voltage, and phase locked loop performance of the UPS.
  • Page 11 MEASure:TVOLt:ABSolute? FETCh:TVOLt:ABSolute? Returns the time at which the absolute value of the measured voltage first exceeds level, with the following qualifications: The behavior of the signal before start_ time is ignored, and the absolute value of the voltage must remain above level for at least the specified min_ pulse_ width. Both start_ time and the return value are with respect to the start of the measurement buffer.
  • Page 12: Additional Sense Commands

    Additional Sense Commands The following additional sense commands are provided with the HP Dual Power Analyzer (Option 020/022). These commands let you select a measurement source and the frequency measurement channel for the Power Analyzer input. SENSe:NSELect Selects the measurement source that will return data when a query is sent. A parameter value of 1 selects the Main Output, which measures the actual output voltage and current of the ac source.
  • Page 13: Additional Frequency Modulation Commands

    Main Output of the ac source and do not affect the measurement capability of the unit. These commands are only provided with the HP Dual Power Analyzer (Option 020/022). Turns off or on frequency modulation of the Main Output. Frequency modulation operates only if FREQuency:MODE is set to FIXed.
  • Page 14: Additional Calibration Commands

    Additional Calibration Commands The following SCPI commands are used to calibrate the Power Analyzer input and external current shunt: CALibrate:VOLTage:EXTernal Initiates calibration of the external voltage measurement. Command Syntax CALibrate:VOLTage:EXTernal Parameters None Examples CAL:VOLT:EXT CALibrate:CURRent:EXTernal Initiates calibration of the external current measurement. Command Syntax CALibrate:CURRent:EXTernal Parameters None Examples CAL:CURR:EXT...
  • Page 15: Behavior Differences Of Existing Scpi Commands

    Returns the same response as a standard ac source, except for the firmware revision number. *OPT? Returns 20, except that the HP 6813B 2000 VA model returns 22. SYSTem:CONFigure <NORMal | IEC > All Option 020 capabilities are only available in NORMal mode.
  • Page 16: Programming Example

    Programming Example UPS Transfer Time Measurement The following programming example illustrates how to use the ac source with the Dual Power Analyzer (Option 020 or 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.
  • Page 17: Using The Power Analyzer Input With The Gui

    Using the Power Analyzer Input with the GUI The HP AC Source Graphical User Interface (GUI) is an easy to use soft front panel for the HP 6800- series AC Power Source/Analyzers. It is supplied with your ac source. With it, you can also control the Power Analyzer input on the back of the unit.
  • Page 18 If you have both the Main Output and the Power Analyzer input displayed, the Main window should display both waveforms, as illustrated in the following screen shot. Making a Voltage Phase Difference Measurement The voltage phase difference measures the phase difference between the output of the ac source and the output of a UPS after ac power is restored following an ac line dropout.
  • Page 19 In the dialog box that appears on the screen, enter values for the indicated parameters. The test uses these parameters to make the measurement. 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 measurement, press Measure.
  • Page 20: Power Analyzer Input Specifications

    Power Analyzer Input Specifications Table A-1 lists the specifications of the HP Dual Power Analyzer Options 020 or 022. Performance specifications are warranted over the ambient temperature range of 0 to 40 o C. Unless otherwise noted, specifications are for a sinewave with a resistive load at a frequency range of 45 Hz to 1 kHz, with the HP-supplied current shunt, after a 30-minute warmup.
  • Page 21 Table A-2. Supplemental Characteristics Isolation to Ground: 300 Vrms/425 Vdc Measurement Ranges AC Voltage: 0−300 Vrms ± 425 V DC Voltage: Current: ± 80 A peak (high range) ± 8 A peak (low range) 13 A rms max. continuous Average Measurement Resolution rms Voltage: 10 mV rms Current:...
  • Page 22: Verification And Calibration For Option 020/022

    Verification and Calibration for Option 020/022 This section includes verification and calibration procedures for the HP Dual Power Analyzer Options 020 or 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 source is performing properly.
  • Page 23: Verification Procedure

    1. Turn-On Checkout 2. Voltage Measurement Accuracy 3. Current Measurement Accuracy NOTE: The ac source must pass turn-on selftest before you can proceed with the verification. Test Set up HP 6811B/6812B/6813B LO HI LO HI SENSE SENSE POWER ANALYZER MAIN OUTPUT...
  • Page 24 Power Analyzer input measurements. Figure B-1A shows the setup. Use the HP-supplied current shunt. It has the accuracy specified in table B- 1. Use wire of sufficient size to carry the maximum rated current of the ac source.
  • Page 25: Calibration Procedure

    Calibration Procedure Table B-1 lists the equipment required for calibration. Figure B-1 shows the test setup. The following procedures assume you 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 circuits connected to the output are touched when power is applied.
  • Page 26 (see figure 3-1B). Set the function generator output to 50 mV, 60 Hz. Connect the Power Analyzer current terminals to the HP 3458A input terminals. Note that the HP 3458A must be in synchronous ac volts mode and a 1.0 uF capacitor must be installed across the HP 3458A input terminals.

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