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Fluke 45 Function Commands and Queries, Function Modifier Commands and Queries, Primary, Display

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Function Commands and Queries

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Users Manual

Function Commands and Queries

The commands in Table 5-11 relate to measurement functions. See Table 5-13 for ranges and measurement rates. Refer to Chapter 3 for a detailed description of each function.

Commands under Primary Display and Secondary Display cause functions to be performed on the primary display or secondary display, respectively.

Table 5-11. Function Commands and Queries

Commands

Primary	Secondary
Display	Display

AAC	AAC2
AACDC*	—
ADC	ADC2
—	CLR2
CONT	—
DIODE	DIODE2
FREQ	FREQ2
FUNC1 ?	—

FUNC2?

OHMS	OHMS2
VAC	VAC2
VACDC*	—
VDC	VDC2

Function

AC current

AC plus DC rms current. Available in the primary display only.

DC current

Clears measurement from secondary display if one shown

Continuity test. Available in the primary display only.

Diode test

Frequency

Meter returns the function selected for the primary display as command mnemonic.

EXAMPLE: If frequency is selected for the primary display, "FUNC1?" returns "FREQ".

Meter returns the function selected for the secondary display as command mnemonic. If the secondary display is not in use, an Execution Error is generated.

EXAMPLE: If frequency is selected for the secondary display, "FUNC2?" returns "FREQ".

Resistance

AC volts

AC plus DC rms volts. Available in the primary display only.

DC volts

*If AACDC or VACDC is selected in the primary display, no other function can be selected for the secondary display. An execution error is generated if this is attempted.

Function Modifier Commands and Queries

The commands in Table 5-12 relate to the function modifiers. A function modifier causes the meter to modify the normal operation of a measurement function (or perform an action on a measurement) before displaying a reading. For example, the relative modifier (REL) causes the meter to display the difference between a measured value and the rela- tive base. The results of function modifier commands can only be shown in the primary display. Refer to Chapter 3 for a more information about each function modifier.

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Fluke 45 Function Modifier Commands and Queries, 11.Function Commands and Queries, Primary, Secondary, Display

Contents

Dual Display Multimeter LIMITED WARRANTY & LIMITATION OF LIABILITY Safety Class Interference InformationDeclaration of the Manufacturer or Importer Introduction Table of ContentsTitle Getting StartedOperating the Meter Using the Computer Interface ApplicationsMaintenance AppendicesList of Tables TitleReplacement Parts Performance Tests for mA Current FunctionsPerformance Tests for A Current Functions List of Figures TitleIntroducing the Fluke 45 Dual Display Multimeter IntroductionChapter WWarningOptions and Accessories Where to go from HereChapter 1 Introduction Chapter 4 Applications Chapter 6 MaintenanceChapter 2 Getting started AppendicesPage WWARNING TO AVOID ELECTRICAL SHOCK OR OTHER INJURYMULTIMETER SAFETY Getting Started Adjusting the HandleLine Power IntroductionFigure 2-1.Front Panel Figure 2-2.Rear PanelUsing the Pushbuttons Turning the Meter onFigure 2-4.Summary of Basic Pushbutton Operations Taking Some Basic Measurements Selecting a Measurement RangeAutomatic Input Terminal Selection WWarningDiode/Continuity Testing Measuring Voltage, Resistance, or FrequencyMeasuring Current Getting Started FREQFREQ Taking Some Basic MeasurementsCIRCUIT Figure 2-7.Continuity TestingFigure 2-8.Diode Testing Note This is a Diode Test FunctionOperating the Meter Under Battery Power Optional Rack MountingOperating the Meter Under Battery Power Optional 2-10 Chapter Operating the Meter From the Front PanelFront Panel Operations IntroductionDisplay Primary DisplaySecondary Display EXT TRG REMOTE SMFMAX dB REL AUTO MIN HOLDInput Terminals Figure 3-4.Input TerminalsE, U, T Selecting a Measurement FunctionRanging AutorangingFigure 3-5.Function Selection Buttons Operating the Meter From the Front Panel RangingMeasuring Frequency Manual RangingFrequency Ranging Operating the Meter From the Front Panel Frequency Measurement RatesFrequency Sensitivity Selection Measuring FrequencySelecting A Function Modifier K, I, H, JOperating the Meter From the Front Panel REL Relative Readings ModifierWWarning Selecting A Function ModifierdB Decibels and Audio Power Modifier Using Function Modifiers in Combination HOLD Touch Hold ModifierMN MX Minimum Maximum Modifier Using the SButton Selecting A Measurement Rate Rate3-15 Operating the Meter From the Front PanelSelecting A Function Modifier PushbuttonsUsing The Compare Comp Function The List and Number EditorsUsing the List Editor Using the Number Editor Power-UpConfiguration Factory Settings of Power-UpConfigurationChanging the Power-UpConfiguration Calibration Chapter Using the Dual DisplayApplications IntroductionUsing Measurement Functions in Combination Using the Dual Display ApplicationsResponse Times How the Meter Makes Dual Display Measurements How the Meter Makes Dual Display MeasurementsMeas Function Update Rate in the Dual Display Mode External TriggerThermal Voltages True RMS Measurements When Measuring ResistanceTwo-WireConfiguration Correcting for Test Lead ResistanceEffects of Internal Noise in AC Measurements Calculated AC + DC RMS MeasurementsTrue RMS Measurements Figure 4-3.Waveform Comparison ChartApplications 4-114-12 Computer Interfaces Operating the Meter Using the Computer InterfaceLocal and Remote Operations ChapterSetting Communication Parameters RS-232 RS-232 Print-OnlyMode Character Echoing and Deletion Device Clear Using C CNTRL CCabling the Meter to a Host or Printer RS-232 RS-232PromptsEnabling the IEEE-488Interface Installing the IEEE-488InterfaceIEEE-488Operating Limitations Addressing the MeterInstallation Test for IEEE-488Operations Getting Started With An Installation TestInstallation Test for RS-232Operations Cabling the Meter to a HostInput Strings How the Meter Processes InputIf Test Fails Input TerminatorsSending Command Strings to the Meter Typical IEEE-488Input StringsSending Numeric Values to the Meter 1.Commands to configure the meter if any 5-10 Figure 5-1.Typical IEEE-488Input StringsHow the Meter Processes Output Triggering OutputExternal Triggering from the Front Panel Setting the Trigger Type Configuration External Triggering via the Computer InterfaceTable 5-3.Trigger Type Write Command Event Status Enable RegisterRead Command Enable RegisterPage Event Status and Event Status Enable Registers 7 6 5 4Status Byte Register Reading the Status Byte RegisterService Request Enable Register Computer Interface Command Set IEEE-488Capabilities and Common Commands5-20 Table 5-9. IEEE-488Common CommandsCommand Table 5-8. IEEE-488Interface Function SubsetsTable 5-10. IEEE-488Common Commands cont Operating the Meter Using the Computer InterfaceComputer Interface Command Set CommandTable 5-11.Function Commands and Queries Function Commands and QueriesFunction Modifier Commands and Queries CommandsCommand Operating the Meter Using the Computer InterfaceComputer Interface Command Set Table 5-12.Function Modifier Commands and QueriesCommand 5-24Description Computer Interface Command Set Range and Measurement Rate Commands and QueriesOperating the Meter Using the Computer Interface 5-25Measurement Queries TRIGGER 5, unexpected results will be obtained5-26 Compare Commands and Queries Trigger Configuration CommandsTable 5-17.Miscellaneous Commands and Queries Miscellaneous Commands and QueriesCommand 5-28Computer Interface Command Set RS-232Remote/Local ConfigurationsOperating the Meter Using the Computer Interface CommandSample Program Using the RS-232Computer Interface 5-30aam23f.eps Operating the Meter Using the Computer Interface 5-31aam24s.tif 5-32 aam25s.tifOperating the Meter Using the Computer Interface 5-33aam26s.tif 5-34 aam27s.tifOperating the Meter Using the Computer Interface 5-35Line Fuse MaintenanceCleaning WWarningTesting Current Input Fuses Current Input FusesWWarning Replacing the 100 mA Input FuseReplacing the 10 A Input Fuse WWarningSelf-TestDiagnostics and Error Codes Performance TestsService Input Level FunctionRange Rate FrequencyReplacement Parts Replacement PartsMaintenance Quantity Fluke Part Number Part DescriptionTable 6-5.Replacement Parts cont DESCRIPTION FLUKE PART NOPage AppendicesAppendix SpecificationsPage Display Counts and Reading Rates SpecificationsAppendix A RS-232and IEEE-488Reading Transfer RatesNormal Mode Rejection Ratio DC VoltageInput Impedance Common Mode Rejection RatioAppendices Decibel ResolutionTrue RMS AC Voltage, AC-Coupled Maximum InputAC + DC Voltage Accuracy Decibel Reference ResistanceMaximum Crest Factor Input ImpedanceAppendices DC CurrentAC Current Maximum InputMaximum Input AccuracyMaximum Crest Factor RangeFrequencyOpen Circuit Voltage OhmsDiode Test/Continuity Input ProtectionSensitivity Level of AC Current FrequencySensitivity of AC Voltage Open Circuit VoltageEnvironmental Specifications AAppendices General OptionsASCII/IEEE-488Bus Codes Appendix BPage Appendices ASCII/IEEE-488Bus Codes BImplementation of IEEE Standard IEEE-488.2Device Documentation RequirementsAppendix C IntroductionDevice-specificcommands used All queries generate a response when parsedNo commands are coupled NUMERIC RESPONSE DATAMEASUREMENT Format 1 NR3 NUMERIC RESPONSE DATAFormat 2 NR3 NUMERIC RESPONSE DATA UNIT Volts dcThe *RDT and *RAT? commands are not implemented There are no additional data structures