Agilent Technologies 5964-8134 User Manual

ADDENDUM

to the

Agilent 6811B, 6812B, and 6813B

User’s Guide and Programming Guide

for the

Dual Power Analyzer Option 020/022

Agilent P/N 5964-8134 Printed in U.S.A. Microfiche No 5964-8135 May, 2000

Contents

Agilent Dual Power Analyzer Description 3 Rear Panel Connections 5 Installation 5 Front Panel Programming 8 Additional Measurement Commands 10 Additional Sense Commands 12 Additional Frequency Modulation Commands 13 Additional Calibration Commands 14 Behavior Differences of Existing SCPI Commands 15 Programming Example 16 Using the Power Analyzer Input with the GUI 17 Power Analyzer Input Specifications 20 Verification and Calibration for Option 020/022 22 Verification Procedure 23 Calibration Procedure 25

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Agilent Dual Power Analyzer Description

The Agilent Technologies Dual Power Analyzer 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 Power Analyzer input on the back of the ac source, an external current shunt, and a cable to connect the current shunt to the ac source. Option 020 adds the following capabilities to the above listed ac source models:

• Voltage and current measurement inputs on the rear panel, with capabilities similar to the output

voltage and current measurements available in standard Agilent ac sources.

• The ability to use any shunt for the external current measurement, allowing current measurements

over a very wide range of magnitudes.

• Precisely synchronized measurements between the rear panel Power Analyzer input and the ac source

output. This is possible because the Power Analyzer input has its own dedicated measurement buffer.

• New measurement commands that may be used in evaluating uninterruptible power supplies (To

measure transfer time, peak voltage, and phase locked loop performance for example).

• Frequency modulation of the ac source output.

As shown in the following figure, the Agilent Dual Power Analyzer also includes an Agilent supplied current shunt, which must be connected to the output of the equipment under test to make accurate voltage and current measurements. The specifications and supplemental characteristics of the Agilent Dual Power Analyzer are documented toward the end of this document.

Power

Agilent AC SOURCE

(side view)

Analyzer Input (V & I sense)

Equipment

Under Test

AC Source output

Agilent supplied cable

ac line cables

(customer supplied)

outputac in

Agilent supplied shunt

Line Load

Shunt

Load

Option 020 Typical Connections

Agilent Option 022 Description

Option 022 is simply an Agilent 6813B Option 019 AC Power Source combined with an Agilent Dual Power Analyzer Option 020. All of the Option 020 information in this document also applies to units that are configured as Option 022 units.

Front Panel Menus - Additions

Select

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 modulation, and calibrate the Power Analyzer input. In most cases you will need to press the Function key multiple times to access the menu item. Press the Entry key to access the parameter.

Phase

Freq

Input Shift

ô ô ô

Cal

ô ô

φ1

115V 60 Hz

φ2

120V 60 Hz

Displays the Main Output measurement when φ1 is selected Displays the Power Analyzer measurement when φ2 is selected

FM OFF Enable or disable output frequency modulation (OFF or ON) FM:FREQ 50 Specifies the modulating frequency of the output FM:DEV 10 Specifies the peak deviation of the output frequency modulation FREQ:SRC VOLT Specifies the frequency input source (VOLT or CURR) CAL:CURR: EXT Begin external current calibration CAL:VOLT: EXT Begin external voltage calibration SHUNT Enter a value for the external shunt in ohms

NOTE: With no signal connected to the Power Analyzer input, the φ2 front panel display may

return a very high frequency value. This is normal, since there is no external frequency for the measurement circuit to detect.

SCPI Programming Commands - Additions

The Power Analyzer input uses the same measurement 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 SCPI commands have been added to let you access the Power Analyzer input, control the output frequency modulation, and calibrate the Power Analyzer input. Additional measurement functions let you measure transfer time, peak voltage, and phase locked loop performance when evaluating devices such as uninterruptible power supplies.

CALibrate MEASure | FETCh

:CURRent :VOLTage

:EXTernal :RANKed? <percentile>

:VOLTage :TVOLt? <level><occurrence>

:EXTernal :ABSolute? <level><start_time><min_pulse_width>

:SHUNt

FM SENSe

:STATe <bool> :NSELect 1 | 2 :DEViation <value> :FREQuency:SOURce VOLT | CURR :FREQuency <value>

Rear Panel Connections

Power Analyzer input. Connector plug is removable.

L 2( N )

HP-IB

. . . .

LO HI LO HI

SENSE

. . . . .

TRIGGER

SENSE

300 V

SENSE

Rear Panel, Overall View

Installation

Turn the unit off before connecting any wires.

The Power Analyzer input to the ac source has both voltage and current sense inputs. Each sense input has a HI and a LO connection. The center pin of the connector is not used. The maximum isolation voltage to ground is 300 Vac (±425 Vdc).

Use the 1-meter, Agilent supplied cable and connect the Power Analyzer input to the external shunt. Note that the cable connectors are keyed so that the cable will only fit one way. Disconnect the cable from the unit by pulling it straight back. Cable connections are shown in the following figure.

IMPORTANT: You should always connect the V SENSE inputs for the Power Analyzer input to operate

properly, even if you are not making voltage measurements. This is because frequency measurements are made by sensing the voltage signal, and many of the power analyzer measurements depend on an accurate frequency measurement. If a voltage signal is not available, use SENSe:FREQuency:SOURce (or its front panel equivalent) to select and measure the frequency from the current signal instead.

If the Agilent 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. Firmly tighten the screws when making wire connections.

WARNING: SAFETY HAZARD You must replace the cable hoods after completing all connections.

This is because the connector screw terminals will be at line potential during operation.

CONNECTOR

(AC SOURCE END)

LO HI LO HI

I V

SENSE SENSE

RELEASE TAB

CONNECTOR HALVES SNAP TOGETHER

HOODS PLACED

OVER WIRES AND

CONNECTORS

WARNING, SAFETY HAZARD:

Connector hoods must be installed on connectors. Connector screw terminals are at line potential during operation.

V SENSE I SENSE

HI LO HI LO

CONNECTOR (SHUNT END)

WIRES MUST BE INSTALLED IN

RELEASE TAB

STRAIN RELIEF INSIDE CONNECTOR

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 voltage sense at a point other than at the external current shunt. You must use your own sense cable to make the voltage sense connections. Please completely remove the voltage sense wires from the Agilent supplied measurement cable if you are using your own remote voltage sense cable. Disconnect the voltage sense wires from both cable connectors.

To use your own cable to voltage sense at a point other than the external current shunt, make the connections at the point where you will be remote sensing. Insert the other end of your cable into the HI and LO voltage sense terminals of the ac source connector. The cable connectors accepts wire sizes from AWG 22 to AWG 12. Firmly tighten the screws when making wire connections.

WARNING: SAFETY HAZARD You must replace the cable hoods after completing all connections.

This is because the connector screw terminals will be at line potential during operation.

External Shunt Line and Load Connections

The Agilent 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. Agilent 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. It is the customer’s responsibility to use these covers when making line cable connections. Note that a different cable cover is provided for the ac output of the ac source.

The following figure shows the Load and Line connectors on the external current shunt. Note the location of the line, neutral and ground connectors and connect your cables accordingly. Note that the connections on the output of the ac source are not in the same order on the barrier block as on the shunt barrier block.

WARNING: SAFETY HAZARD You must replace the cable hoods after completing all connections.

This is because the screw terminals will be at line potential during operation.

1. NEUTRAL CONNECTION (BLUE OR WHITE)

2. LINE CONNECTION (BROWN OR BLACK)

3. GROUND CONNECTION (GRN/YEL OR GRN)

4. POWER CORD

5. CONNECTOR NUT

6. RUBBER BOOT

7. POWER SAFETY COVER

8. STRAIN RELIEF CONNECTOR

Line Connections

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. To check the shunt value setting, proceed as follows:

Action Display

1. Turn on the ac source and wait for the unit to finish its internal selftest.

Press Shift Calibration and scroll to the SHUNT command.

3. Check to see if the resistance value on the display matches the value written on the outside of the external curre nt shunt.

If it matches, press Meter to return to meter mode. You are done. If it does not match, you must enter the correct value. Proceed as follows:

Press Shift Calibration, scroll to CAL ON and press Enter. If necessary, enter the calibration password from Entry keypad and press Enter. If the password is correct the Cal annunciator will come on.

Press Shift Calibration and scroll to the SHUNT command. Enter the shunt value written on the outside of the external cur rent shunt exactly as it is written on the label. Then press Enter.

Press Shift Calibration, scroll to CAL SAVE, and press Enter.

Press Shift Calibration, select CAL OFF, and press Enter to exit Calibration.

SHUNT 0.01

CAL ON 0.0

SHUNT 0.01

CAL:SAVE

CAL OFF

NOTE: The shunt value that you enter applies only to the Power Analyzer input and has no

effect on ac source output measurements. Therefore, ignore the φ1 and φ2 annunciators while entering the shunt value.

Front Panel Programming

Setting the Output Frequency Modulation

To set the output frequency modulation:

Action Display

On the Function keypad, pr ess Frequency. Then scroll to the FM:FREQ comma nd to enter a modulating frequency. Use the numeric keypad to enter a modulating value and press Enter.

2. To set the peak frequency deviation of the output frequency modulation, press

Frequency. Then scroll to the FM:DEV command to enter a frequency deviation. Use the numeric keypad to enter a value and press Enter.

The deviation frequency must be less than the programmed output frequency by at least 0.001 Hz

To enable frequency modulation, press Frequency, scroll to FM OFF, select the

ON parameter and press Enter.

. Otherwise, it will result in Error 613.

FM:FREQ 1

FM:DEV 10

FM ON

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