PN 601648May 1996© 1996 Fluke Corporation, Inc.All rights reserved. Printed in U.S.A. ®

5700A/5720ASeries II Multi-Function Calibrator

Operator Guide

1

Contents

What is in this Guide? ................................ 2Safety Summary......................................... 2P Fuse and Line Voltage .......................... 4Basic Operation.......................................... 5A Short Calibration Exercise....................... 5

Warming up the Calibrator ..................... 5Exercise: Running dc Zero Calibration........ 6

Connecting a Meter................................ 6Applying a dc Voltage ............................ 7Checking the Calibrator Uncertainty ....... 7Exercise: Activating Error Mode ............. 8Checking the Meter’s Higher and Lower

Ranges ..................................... 8Exercise: Applying an ac Voltage ........... 9

Front Panel Features.................................. 10Output Display (Left Side) ...................... 10Control Display (Right Side) ................... 10Display Screen Saver............................. 11Front Panel Keys ................................... 12Front Panel Connectors ......................... 21

Rear Panel Features .................................. 23Rear Panel Connectors .......................... 23Switches and Fuse Holder...................... 26

Cable Recommendations............................ 27Connecting to a UUT (Unit Under Test) ...... 28Using Error Mode ....................................... 35Operating in Remote .................................. 37RS-232-C Interface Parameters.................. 38

2

What is in this Guide?The Operator Guide begins with safetyinformation, a short meter calibration exercise fornew users, then continues with a condensation ofinformation from the Operator Manual. Forcomplete information about the Calibrator’sfeatures, functions, and operating procedures,refer to the Operator Manual.

Safety SummaryWarning

[

Lethal voltage may be present on theterminals. Observe all safetyprecautions in this guide.

To avoid electrical shock hazard, the operatorshould not electrically contact the OUTPUT HI orSENSE HI binding posts. During operation, lethalvoltages of up to 1100V ac or dc may be presenton these terminals.

Whenever possible, keep one hand away from theequipment to reduce the hazard of current flowingthrough vital organs of the body.

Symbols Marked on Equipment

[ Warning - Risk of electric shock.

Q Ground Protective ground (earth) terminal.

P Attention Refer to the manual forinformation about this feature. This symbolappears on the rear panel ground terminaland by the fuse holder.

Use the Proper FuseTo avoid fire hazard, use only the fuse specifiedon the line voltage selection switch label.

3

Safety Summary (cont.)[Grounding the Calibrator

The Calibrator is a Safety Class I (groundedenclosure) instrument. The enclosure is groundedthrough the grounding conductor of the powercord. To avoid electrical shock, plug the powercord into a properly wired earth groundedreceptacle before making any connections to theCalibrator terminals. A protective groundconnection by way of the grounding conductor inthe power cord is essential for safe operation.

[Do Not Remove the CoverTo avoid personal injury, do not remove theCalibrator cover. Do not operate the Calibratorwithout the cover properly installed. There are nouser-serviceable parts inside the Calibrator, sothere is no need to ever remove the cover.

4

P Fuse and Line VoltageThe correct fuse type for each voltage selection isindicated on the rear panel as shown in thefollowing figure.

VOLTAGESELECTION

FUSE-F1

T 125A250V(SB)

100VS2 S3 S4

110V115V120V

VOLTAGESELECTION

FUSE-F1

T 125A250V(SB)

200VS2 S3 S4

220V230V240V

CAUTION FOR FIRE PROTECTION REPLACE ONLYWITH A 250V FUSE OF INDICATED RATING.

VOLTAGESELECTION

FUSE-F1

T 125A250V(SB)

100VS2 S3 S4

110V115V120V

VOLTAGESELECTION

FUSE-F1

T 125A250V(SB)

200VS2 S3 S4

220V230V240V

CAUTION FOR FIRE PROTECTION REPLACE ONLYWITH A 250V FUSE OF INDICATED RATING.

Line Power Label and Switch Locations

5

Basic OperationTo set the output, simply press the followingsequence of keys to select an output function andamplitude:

[numeric keys] [multiplier] [function] E O

For example, to set the output to 10 mV dc, press:

1 0 m V E O

To set an ac output, press the following additionalkeys:

[numeric keys] [multiplier] H E

For example, to change the present 10 mV dc to10 mV ac @ 1.8 kHz, press:

1 . 8 K H E

To change the output back to dc, press:

0 H E

or

+ E

A Short Calibration ExerciseIf you are not familiar with the Calibrator, you willfind that the following exercise quickly teaches yousome important front panel operations.

Warming up the CalibratorWhen you first turn the Calibrator on, you shouldlet it warm up for 30 minutes. This ensures that theCalibrator meets or exceeds its specifications.

6

Exercise: Running dc Zero CalibrationDC Zero is a brief internal process that removesoffset errors. The specifications require that yourun dc Zero at least every 30 days.

To run dc Zero, press the following sequence ofsoftkeys:

Setup Menus Cal Zero

Press any key, then press P twice to return tonormal operation.

Connecting a MeterTypical connections for handheld and benchtopmeters are shown on the next page. The diagramsshow the use of Fluke Model 5440-7002 LowThermal Cables. Other types of cable may be usedfor this exercise. To connect either type of meter,proceed as follows:

1. Verify that the Calibrator is on, and is instandby mode (STANDBY indicator lit). If theCalibrator is not in standby, press r.

2. Set the meter to the lowest range that reads10V dc.

3. Connect the shield lead (if your cables areshielded) to V GUARD on the Calibrator.

4. Verify that both X and x are off. Pressthem if they are lit.

5. Connect the meter input LO to the CalibratorOUTPUT LO.

6. Connect the meter input HI to the CalibratorOUTPUT HI.

7

Exercise: Connecting a Meter (cont.)

HI HI

LO LO

HI

AUXCURRENT GUARD GROUND

WIDEBAND

Calibrator

10A

300mA

V

COM

DMM

NC

EX SNS: OFF

EX GRD: OFF

OUTPUTV AΩ

SENSEV Ω

Ω

HI HI

LO LO

HI

OUTPUTV A

SENSEV

AUXCURRENT

GUARDGROUND

WIDEBAND

Calibrator

DMM

INPUT

NC

EX SNS: OFF

EX GRD: OFF

Ω Ω

Applying a dc VoltageApply 10V dc to the meter by pressing thefollowing sequence of keys:

1 0 V E O

Checking the Calibrator UncertaintyPress s. The total uncertainty for the 10V youare applying to the meter is displayed on theControl Display (the large dot-matrix display on theright side of the front panel). This number dependson the setting of the calibration cycle andspecification confidence level in a setup menu.

Press P to clear the uncertainty display.

8

Exercise: Activating Error ModeChances are the meter reads something other thanexactly 10V. To quickly check the error of themeter, turn the rotary knob to obtain a meterreading of exactly 10V, and read the error off theControl Display.

Turning the knob is all it takes to activate errormode. When you turn the knob, the leastsignificant digit is highlighted. This digit changesas you turn the knob. To change a higher orderdigit, thereby speeding up the adjustment rate,press <.

The error on the Control Display is a combinationof offset, scale, and linearity errors. You can viewcomponent parts of the error by pressing o andS.

Checking the Meter’s Higher and Lower RangesTo check the meter error at 100V dc, first set themeter range (if applicable) to the lowest range thatreads 100V. Press Y O. This sets a newreference equal to ten times the previousreference of 10V dc. (Pressing O was necessarybecause the Calibrator goes into standby when itcrosses the safety threshold from below 22V toover 22V.) Turn the rotary knob to re-activate errormode and determine the meter error at 100V.

Now press Z Z. Set the meter range switch (ifapplicable) to the lowest range that reads 1V.

To end the error mode session, press E.This recalls the reference value and exits errormode.

Press r to set the output to 0 mV dc in standby.

9

Exercise: Applying an ac VoltageThere is no “ac mode” switch on the Calibrator.You change a dc output to ac by entering afrequency through the keypad and pressingE.

To test the meter at 10V at 1 kHz, set the meter toread 10V ac, press 1 0 V, then 1 KHEO. Adjust the rotary knob for areading on the meter of exactly 10V.

To test the meter’s flatness, press a. The 0.1 Hzdigit is highlighted. Press < four times. Turn theknob to change the 1 kHz digit until the Calibratoris set to 10 kHz. Press a and turn the knobagain to check the meter’s accuracy at 10 kHz.Each time you change the frequency, you need towait for the Calibrator output to settle (the “u”annunciator will go out).

This ends the front panel exercise. To zero theoutput and go to standby, press r.

10

Front Panel FeaturesFollowing is a brief description of the Calibrator’sfront panel features.

Output Display (Left Side)Shows output amplitude and frequency. The topline shows the active output value in up to eightdigits, plus a polarity sign. The bottom line showsoutput frequency in five digits. Annunciators belowthe amplitude line on the output display indicatethe following active conditions:

OPERATE Lit when an output is active at thebinding posts or auxiliary amplifier.

STANDBY Lit when the Calibrator is in standby.

ADDR Lit when the Calibrator is addressedover the IEEE-488 interface.

ØLCK Lit when the Calibrator output isphase locked to a signal at the rearpanel PHASE LOCK connector.

ØSHF Lit when the Calibrator output has aprogrammed phase difference with asignal at the real panel VARIABLEPHASE OUT connector.

u (Unsettled) Lights when the output ischanged, and remains lit until theoutput settles to within specification.

Control Display (Right Side)Shows data entries, UUT error adjustments,softkey labels, and other prompts and messages.Each softkey label identifies the functions of thesoftkey that appears directly below it. All of thesoftkey labels that appear on the display at onceare referred to as a menu. When you access thefunction provided through the softkeys, you openup other menus, containing new softkey labels.

11

Display Screen SaverBoth the Output and Control displays blankautomatically after 30 minutes of inactivity, unlessthe Calibrator is in one of the operating states thatoverrides the screen saver.

If the screen saver has activated, you can restorethe display by pressing C. Pressing another keyor turning the knob restores the display andperforms the command sent by the key or knob.

The screen saver does not operate:

• if any part of the Setup menu is displayed.

• during remote operation.

• during calibration or diagnostics.

• when an error message is displayed.

12

Front Panel KeysOToggles the Calibrator between operate andstandby modes. In standby mode, the OUTPUTbinding posts are internally disconnected from theCalibrator. The Calibrator powers up in standbymode.

The Calibrator automatically switches to standbymode when:

• r is pressed.

• the Calibrator is sourcing an ac or dc voltagebelow 22V, and a voltage greater than 22V isselected.

• the output function is changed, e.g., from dccurrent to ac current.

• the output location is changed.

The Calibrator does not switch to standby whenthe voltage is switched from any ac or dc voltageto an ac or dc voltage less than 22V.

13

Front Panel Keys (cont.)

XOpens and closes an internal connection betweenthe SENSE and OUTPUT binding posts. TheCalibrator powers up with these two binding postsconnected internally (the SENSE binding posts areopen circuited), and the X indicator off. TogglingX on (so it lights) disconnects the sense linesfrom the OUTPUT binding posts.

External sensing should be used in the followingfunction under the stated conditions.

• In the dc voltage function when the UUTdraws enough current to produce a significantvoltage drop in the cables.

• In the resistance function when the UUT has afour-wire input and the Calibrator is set to 100kΩ or less.

• External sensing can also be used in the two-wire ohms function to activate two-wirecompensation circuitry to the UUT terminals.

14

Front Panel Keys (cont.)xOpens and closes an internal connection betweenthe V GUARD (voltage guard) and OUTPUT LO.The Calibrator powers up with the V GUARDinternally connected to OUTPUT LO and the xindicator off. Toggling x on (so it lights)disconnects OUTPUT LO from the V GUARD.

The V GUARD binding post provides an externalconnection point for the voltage internal guard. Fora UUT with ungrounded inputs, the V GUARDshould be connected to LO internally. (The EXGRD key is toggled off.) For a UUT with agrounded input, the GUARD may be externallyconnected to the grounded UUT input. (The EXGRD key is toggled on.)

wEnables and disables the -03 Wideband AC optionand sets the Calibrator to standby mode. Whenenabled, the ac voltage output over the range of10 Hz to 30 MHz is available at the front panelWIDEBAND connector. The wideband function isdisabled whenever w is toggled off, or whenanother function (such as current) is selected.

15

Front Panel Keys (cont.)BEnables or disables output from an amplifier, whenit would not otherwise be automatically selected.Sets the Calibrator to standby if this selectionmoves the output location.

When available, an amplifier is automaticallyselected for output settings that exceed Calibratorcapabilities, but fall within the limits of the selectedamplifier. The B key is only needed to activatean amplifier for an output setting that is availablefrom either the Calibrator or from the amplifier.This allows you to take advantage of amplifiercapabilities other than extended range (i.e. highercompliance voltage).

For both voltage and current, the amplifier isassumed to be a 5725A unless another model isdesignated in the Setup menus.

PAborts the current operation of the Calibrator andrecalls the previous menu. Some menus display amore specific label for this key, such as “DONEsetting up.”

Softkeys uThe functions of the five unlabeled softkeys areprovided through each menu in the ControlDisplay, with each function located directly abovethe softkey that activates that function. Many ofthese functions access new menus that contain anew set of functions for the softkeys, providingaccess to many capabilities and configurationoptions through the menu tree.

POWER switch

Turns the power on and off.

16

Front Panel Keys (cont.)<a>These keys are the output adjustment controls. Ifany of these keys are pressed, or if the knob isturned, a digit on the Output Display becomeshighlighted. Turning the knob adjusts the outputvalue. An error display appears on the ControlDisplay, showing the difference between theoriginal (reference) output and the new (adjusted)output.

The < and > keys move the highlight to thedigit you wish to change. In the ac functions, thea key allows you to move amongst voltage,current, and frequency. In practice, for voltage andcurrent outputs, the knob and arrow keys are usedto adjust output until the UUT reads correctly. Theerror display shows the UUT deviation from thereference.

rDuring local operation, pressing r aborts thecurrent operating state of the Calibrator andreturns the Calibrator to the power-up defaultstate. (This key is not effective during remoteoperation.)

SIdentifies a UUT full-scale endpoint for checkinglinearity, and does not change the output. If theoutput was adjusted with the rotary knob,subsequent keyed-in output values are multipliedby a scale factor. Scaling is deactivated bypressing S again, or by selecting anotherfunction. Scaling is not available for resistanceoutputs.

17

Front Panel Keys (cont.)LCalls up a menu that allows you to specify limitsbeyond which the Calibrator will not operate. Thiscan be used to set limits that protect bothoperators and equipment.

ZChanges the output to one tenth the referencevalue (which is not necessarily the same as thepresent output value). The value only changes ifthe new value is within performance limits.

YChanges the output to ten times the referencevalue (which is not necessarily the same as thepresent output value). The value only changes ifthe new value is within performance limits. Thiskey sets the Calibrator to standby if this change ismade from a value less than 22V to one that isgreater than or equal to 22V.

sCauses the Calibrator to compute and display itsuncertainty for the present output setting for thecalibration interval and specification confidencelevel selected in the setup menus.

oIdentifies a UUT zero-scale endpoint and does notchange the output. Subsequent keyed-in outputvalues have the offset value (the Calibrator outputvalue when o was pressed) added to them.Offset mode is deactivated by pressing o again,or by selecting another function. Offsets areavailable for dc outputs only.

18

Front Panel Keys (cont.)CClears a partially completed keypad entry from theControl Display, or clears an error message thatrequired acknowledgment, If there is a partiallycompleted entry when C is pressed, the output isunaffected.

NThis key is only active during error modeoperation. It establishes the present output valueas a new reference for meter error computation.

DWhen in the ac volts, or wideband function, and ifno entry is in progress, the D key shows theequivalent dBm output on the Control Display. Forthe ac voltage function, dBm is calculated for a600Ω load. (For ac outputs less than 220 mV, theCalibrator output impedance is always50Ω because the output is resistively divided.) Forthe wideband function, dBm is calculated for a50Ω resistive termination at the end of a three-foot50Ω coaxial cable.

NoteThe formula to compute dBm is:

dBm = 10 log (power in mW)

Examples:For 3.0V into a 600Ω load:dBm = 10 log (15.000) = 11.7609 dBm

for 3.0V into a 50Ω load:dBm = 10 log (180.000) = 22.5527 dBm

19

Front Panel Keys (cont.)ELoads a newly keyed-in output value showing onthe Control Display into the Calibrator. If you pressE without identifying the units for the entry,the Calibrator keeps the units (except Hz) thatwere last used. This allows you to alter values fora function without keying in the units every time.The multipliers are not retained, for example, youcan enter 1 mV, and then later simply enter 10 toobtain 10V.

In addition to these functions, the E keyrecalls the currently programmed reference valueduring error mode operation.

D V A Q H(Output Function Keys)

These keys select the output function as follows:

D Decibels relative to 1 mW

V Voltage

A Current

Q Resistance

H Frequency

When a value, then H are selected, theCalibrator automatically switches to ac. To changeback to dc, enter 0 H or enter a signed (+ or -amplitude).

U m K M(Multiplier Keys)

These keys select output value multipliers. Forexample, if you enter 33, then m, then V, thenENTER, the Calibrator output value is 33 mV.

U micro (10-6 or 0.000001)

m milli (10-3 or 0.001

K kilo (103 or 1000)

M Mega(106 or 1,000,000)

20

Front Panel Keys (cont.)

0 - 9 (Numeric Keypad)

Used to enter the digits of the output amplitudeand frequency, as well as other data such as thetime and date. The proper sequence for entering avalue is to enter the digits, then any necessarymultipliers, an output function key, then E.For example, to obtain an output of 20 mV, youwould press the following sequence of keys:2 0 m V E. The . key isavailable for decimal places.

+If the output function is dc voltage, current, acvoltage entered in dBm, or a wideband outputentered in dBm, pressing + E toggles thepolarity of the output. If the output function is acvoltage or current, pressing + E changesthe output to dc.

21

Front Panel ConnectorsWIDEBAND Connector

A type “N” connector that provides a connectionpoint for output from the -03 Wideband AC option.Wideband output specifications are stated foroutput levels present at the end of its three-foot50Ω coaxial cable terminated into a 50Ω purelyresistive load. The connector shell is connected tochassis ground.

GND Binding Post

If the Calibrator is the location of the groundreference point in a system, the GND binding postcan be used for connecting other instruments toearth ground. (The chassis is normally connectedto earth ground through the three-conductor linecord instead of through the earth ground bindingpost.)

V GUARD Binding Post

Provides an external connection point for theinternal voltage guard. For a UUT with floating(ungrounded) inputs, the C GUARD should beconnected to LO internally (x key toggled off).For a UUT with a grounded input, the V GUARDmust be externally connected to the grounded UUTinput (x key toggled on). The maximumallowable potential between the V GUARDconnector and chassis ground is 20V peak.

22

Front Panel Connectors (cont.)SENSE Binding Posts

Used in the resistance and voltage functions forsensing at the UUT after you have selectedexternal sense by toggling the X key on, or byremote command.

External sensing should be used in the dc voltagefunction when the UUT draws enough current toproduce a significant voltage drop in the cables,and in the resistance function when the UUT has afour-wire ohms input and the Calibrator is set to100 kΩ or less. External sensing can also be usedin the two-wire ohms function to allow the two-wirecompensation circuitry to the UUT terminals. Referto the connection diagrams for examples of usage.

OUTPUT Binding Posts

Provide connection points for ac and dc currentand voltage output, as well as for resistance. Thefunction of each OUTPUT binding post is definedbelow:

LO The common binding post for alloutput functions including Calibratoramplified voltage output, but not forOption -03 Wideband AC or auxiliaryamplifier output.

HI The active binding post for all outputfunctions, including 5725A amplifiedvoltage output; does not includeOption -03 Wideband AC or auxiliaryamplifier output.

AUXCURRENTOUTPUT

An optional active binding post forcurrent. This output is convenient forcalibrating UUTs that have aseparate current input terminal.

23

Rear Panel FeaturesThe following list provides descriptions of theconnectors and switches on the Calibrator’s rearpanel.

Rear Panel Connectors5725A AMPLIFIER Connector

Provides the analog and digital interface for theFluke 5725A Amplifier.

5205A AMPLIFIER Connector

Provides the analog and control interface for eitherthe Fluke 5205A or 5215A Precision PowerAmplifier.

5220A AMPLIFIER Connector

Provides the analog and control interface for theFluke 5220A Transconductance Amplifier.

VARIABLE PHASE OUT BNC Connector

Provides access to a variable-phase nominal 2.5Vrms sine wave signal. The phase of this signal canbe adjusted using the arrow keys and rotary knob(or by remote commands) to lead or lag the mainCalibrator output signal by up to 180°. Theconnector shell is not connected directly to chassisground; it is connected internally to the OUTPUTLO binding post. The maximum allowable potentialbetween the connector shell and chassis ground is20V peak.

24

Rear Panel Connectors (cont.)PHASE LOCK IN BNC Connector

Provides the input for an external signal ontowhich the Calibrator can be phase locked (1V to10V rms, 10 kΩ input impedance). The connectorshell is not connected directly to chassis ground; itis connected internally to the OUTPUT LO bindingpost. The maximum allowable potential betweenthe connector shell and chassis ground is 20Vpeak.

IEEE-488 CONNECTOR

This is a standard interface connector foroperating the Calibrator in remote control as eithera Talker or a Listener of the IEEE-488 Bus.

RS 232C Connector

A male (DTE) serial port connector for transmittinginternal calibration constant data to a printer,monitor, or host computer. This connector is alsoused for remote control of the Calibrator.

25

Rear Panel Connectors (cont.)The OUTPUT, SENSE, and V GUARD bindingposts on the rear panel are alternative connectionsto the UUT. An internal cable enables either thefront or rear binding posts. The procedure todisable the front panel binding posts and enablethe rear panel binding posts involves opening thecover of the Calibrator, which should only be doneby authorized service personnel.

The I GUARD binding post provides an externalconnection point for the internal current guard. Thecurrent guard is used when the Calibrator issupplying low-level ac current through a long cableto remove errors introduced by leakage throughthe cable capacitance.

Refer to the connection diagrams for examples ofusage.

AUX CURRENT OUTPUT

This output is not available on the rear panelbinding posts.

CHASSIS GROUND Binding Post

A binding post that is internally grounded to thechassis. If the Calibrator is the location of theground reference point in a system, this bindingpost can be used for connecting other instrumentsto earth ground. (The chassis is normallyconnected to earth ground through the three-conductor line cord instead of through the earthground binding post.)

26

Switches and Fuse HolderCALIBRATION SWITCH

A slide switch that enables and disables thecapability to write to nonvolatile memory. Thisswitch is used for recording and then storingcalibration constants, dates, and parametersettings. When this switch is in the ENABLEposition, you can write to memory; when in theNORMAL position, the data in the memory isprotected from being overwritten. The switch isrecessed in order to allow the metrologist to coverit with a calibration sticker to guarantee calibratorintegrity.

F1 Fuse Holder

This holds the line power fuse. See “Fuse and LineVoltage” at the beginning of this guide for thelocation of the correct ratings.

Line Voltage Selection Switches

Select the operating line voltage. See “Fuse andLine Voltage” at the beginning of this guide for thelocation of the label that shows the correct ratings.

27

Cable Recommendations

Output Function Cable Recommendations

DC Voltage

AC Voltage ≤10 kHz

AC Current ≤2A, ≤10kHz

DC Current ≤2A

Resistance

Low Thermal EMF Test Leads(5440A-7002) or twisted shielded pair

AC Voltage > 10 kHz SENSE/GUARD: Triaxial cable orTwinax (e.g., Alpha 2829/2).OUTPUT: Coaxial

Or: SENSE: Coaxial, OUTPUT:Coaxial GUARD Lead: Separate wire

AC Current with Guard Triaxial cable

Wideband AC 3 feet (1m) 50Ω coaxial cable withType “N” male connector suppliedwith the option. A 50Ω feedthroughterminator is also supplied forconnecting to meters with impedancehigher than 50Ω.

Voltage-BoostedOutput, 5205A or 5215A

Use the cable supplied with theamplifier.

Voltage-BoostedOutput, 5725A

Low Thermal EMF Test Leads(5440A-7002). (Output is at theCalibrator front panel.)

Current-Boosted Output,5725A, 5220A

16-gauge or heavier twisted-pairinsulated wire, as short as possible tominimize resistance and inductance.(Output is at the amplifier terminals.)

28

Connecting to a UUT (Unit Under Test)

UUT

HI

LO

A

HI

LO

GUARD

INPUT SENSE 4-WIRE

HI HI

LO LO

HI

OUTPUTV A

SENSEV

AUXCURRENT GUARD GROUND

WIDEBAND

Calibrator

UUT

HI HI

LO LO

HI

OUTPUTV A

SENSEV

AUXCURRENT

GUARDGROUND

WIDEBAND

UUT

HI HI

LO LO

HI

OUTPUTV A

SENSEV

AUXCURRENT

GUARD GROUND

WIDEBAND

CalibratorC.

B.

A.

EX SNS: ON

EX SNS: OFF

EX GRD: OFF

EX SNS: OFF

EX GRD: ON

Ω

Ω

Ω Ω

Ω

Ω

Ω

Calibrator

DC

INPUT

AC

LOHI

EX SNS: ON

SHIELDED TWISTED PAIR

SHIELDED TWISTED PAIR

DC Voltage, AC Voltage ≤10 kHz

29

Connecting to a UUT (cont.)

B.

A.

UUT

HI

LO

A

HI

LO

GUARD

INPUT SENSE 4-WIRE

HI HI

LOLO

HI

SENSEV

AUXCURRENT

V-GUARD GROUND

WIDEBAND

Calibrator

Keep the SENSE leads as short as possible.

Be careful not to exceed the capacitive load limit of 1000 pF up to 220V, 600 pF 220 to 1100V. (1000 pF with 5725A Amplifier.)

TRIAXIAL CABLE

UUT

HI

LO

A

HI

LO

GUARD

INPUT SENSE 4-WIRE

HI HI

LO LO

HI

SENSEV

AUXCURRENT

V-GUARD GROUND

WIDEBAND

Calibrator

TRIAXIAL CABLE

EX SNS: OFF

EX GRD: OFF

EX SNS: ON

EX GRD: OFF

OUTPUTV AΩ

OUTPUTV AΩ Ω

ΩΩ

Ω

TRIAXIAL CABLE

NOTE

AC Voltage >10 kHz

30

Connecting to a UUT (cont.)

B.

UUT

HI

LO

A

HI

LO

GUARD

INPUT SENSE 4-WIRE

HI HI

LO LO

HI

OUTPUTV A

SENSEV

AUXCURRENT

GUARDGROUND

WIDEBAND

Calibrator (FRONT)

A.

UUT

HI

LO

A

HI

LO

GUARD

INPUT SENSE 4-WIRE

HI HI

LO LO

OUTPUTV A

SENSEV

I-GUARDV-GUARD

Calibrator (REAR)

TRIAXIAL CABLE

EX SNS: OFF

EX GRD: OFF

EX SNS: OFF

EX GRD: OFF

NC

Ω

Ω Ω

ΩΩ

Ω

AC Current ≤2A

31

Connecting to a UUT (cont.)

HI HI

LO LO

HI

AUXCURRENT

GUARD GROUND

WIDEBAND

Calibrator

10A300mA

V

COM

UUT

NC

UUT

HI

LO

A

HI

LO

GUARD

INPUT

HI HI

LO LO

HI

SENSEV

AUXCURRENT

GUARD GROUND

WIDEBAND

Calibrator

CalibratorUUT

SENSE

SENSE

SOURCE

SOURCE

CalibratorUUT

B.

A.

EX SNS: OFF

EX SNS: ON

OUTPUTV AΩ

OUTPUTV AΩ

Ω

SENSEV Ω

Ω

SENSE 4-WIREΩ

EX GRD: OFF

2-WIRE

COMP

OFF

EX GRD: OFF

2-WIRECOMPOFF

Resistance

32

Connecting to a UUT (cont.)

CalibratorUUT

COMP

COMP

HI HI

LO LO

HI

SENSEV

AUXCURRENT

GUARD GROUND

WIDEBAND

CalibratorUUT

NC

C.

CalibratorUUT

COMP

COMP

10A

300mACOM

VΩ

EX SNS : OFF EX GRD : OFF2-WIRECOMP

ON

EX SNS : ON

NC

OUTPUTV AΩ Ω

HI HI

LO LO

HI

OUTPUTV A

SENSEV

AUXCURRENT

GUARD GROUND

WIDEBAND

Calibrator

10A

300mACOM

UUT

NC

D.

VΩ

Ω Ω

Use Connections With Exposed Plug Tips For The Ohms Function Only.

EX GRD : OFF2-WIRECOMP

ON

Caution

Resistance (cont.)

33

Connecting to a UUT (cont.)

HI HI

LO LO

HI

OUTPUTV A

SENSEV

AUXCURRENT

GUARD GROUND

WIDEBAND

Calibrator

Cable Supplied WithOption -03

Cable Supplied WithOption -03

For wideband meters with higher than 50Ω input impedance, use the 50Ω feedthrough terminator at the meter connection end. For all wideband applications, take care to achieve a good 50Ω impedance match (use cable and connectors with a characteristic input impedance of 50Ω).

NOTE

Ω Ω

50Ω Feedthrough TerminatorSupplied With Option -03

Wideband AC Voltage Output(Option -03)

34

Connecting to a UUT (cont.)

UUT

HI

LO

A

HI

LO

GUARD

INPUT SENSE 4-WIRE

HI

LO

5725A

Ω

5725A Amplified Current Output

35

Using Error ModeActivate error mode by turning the rotary knob,pressing an arrow key, or pressing a. When youenter error mode, the starting value is thereference from which errors are computed. A newreference is established when you exit and reentererror mode. The following table lists the actionsthat cause the Calibrator to exit error mode.

36

Using Error Mode (cont.)

Keys Action

E Returns to the previous referencevalue.

+, then E Establishes a new reference.

A keypad entry, then

E

Establishes a new reference.

N Establishes the present output as anew reference.

Y Sets the Calibrator to ten times thereference value and establishes a newreference.

Z Sets the Calibrator to one-tenth thereference value and establishes a newreference.

o Identifies the present output as a zero-scale endpoint for scaling, andestablishes 0.0 as the new reference.

S Identifies the present output as a full-scale endpoint for scaling and causesthe display to show scale error.

r Returns to the power-up state.

The “Setup Menus”softkey

Opens the setup menu.

37

Operating in RemoteTo operate the Calibrator remotely, proceed asfollows:

1. Turn off the Calibrator power.

2. Connect a remote interface to either the RS-232C or IEEE-488 connector on the Calibratorrear panel.

3. Turn on the Calibrator power.

4. Choose the correct remote parameters usingthe softkey menus:

a. Setup Menus Instmt Setup Remote PortSetup

b. Select Remote Port type (GPIB = IEEE-488), Remote lang (NORMAL or emulationmode)

c. Select either GPIB Port Setup or RS-232Port Setup.

d. If GPIB: select the address.

e. If RS-232: select the parameters in thenext table.

38

RS-232-C Interface Parameters

Parameter Choices Default Setting

Data Bits 7 or 8 8

Stop Bits 1 or 2 1

Flow Control Ctrl S/Ctrl Q(XON/XOFF), RTS,or none

Ctrl S/Ctrl Q

Parity Checking Odd, even, or none none

Baud Rate 110,300,600,1200,2400,4800,9600, or19200

9600

Time-out Period 0 to 30 seconds 0 (no time-out)

EOL (End of Line) CR, LF, or CR LF CR LF

EOF (End of File) Any two ASCIIcharacters

no characters