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Fluke 45 user manual Compare Commands and Queries, Trigger Configuration Commands

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Compare Commands and Queries

Operating the Meter Using the Computer Interface	5
Computer Interface Command Set

Compare Commands and Queries

The commands in Table 5-15 cause the meter to determine whether a measurement is higher than, lower than, or within a specified range. These commands correspond to the COMP, HI, and LO buttons on the front panel.

Command

COMP

COMP?

COMPCLR

COMPHI <high value>

COMPLO <low value>

HOLDCLR

Table 5-15. Compare Commands and Queries

Description

Meter enters compare (COMP) function. Touch Hold is automatically turned on. (Touch Hold can be turned off with "HOLDCLR" command.)

Meter returns "Hl" if the last COMP measurement reading was above the compare range, "LO" if it was below it, "PASS" if within compare range, or "— " if a measurement has not completed.

Meter exits compare function (and Touch Hold if it is selected), and restores display to normal operation.

Sets "HI" compare (COMP) value to <high value>. <high value> can be a signed integer, signed real number without exponent, or signed real number with exponent.

Sets "LO" compare (COMP) value to <low value>. <low value> can be a signed integer, signed real number without exponent, or signed real number with exponent.

Meter exits Touch Hold and restores display to normal operation, but does not exit the compare function.

Trigger Configuration Commands

The commands in Table 5-16 set and return the trigger configuration.

Command

TRIGGER <type>

Table 5-16. Trigger Configuration Commands

Description

Sets the trigger configuration to <type>.

<type> corresponds to a number between 1 and 5 selected from Table 5-15A. If the <type> entered is not one of these numbers, an Execution Error is generated.

Type

1

2

3

4

5

Table 5-15A. Trigger Type

Trigger	Rear Trigger

Internal	Disabled
External	Disabled
External	Disabled
External	Enabled
External	Enabled

Settling Delay



Off

On

Off

On

TRIGGER?

Select a trigger type with the settling delay (type 3 or 5) enabled when the input signal is not stable before a measurement is triggered. Typical settling delays are provided in Table 4-4.

Returns the trigger <type> set by the TRIGGER command.

5-27

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Fluke 45 user manual Compare Commands and Queries, Trigger Configuration Commands

Contents

Dual Display Multimeter LIMITED WARRANTY & LIMITATION OF LIABILITY Declaration of the Manufacturer or Importer Safety ClassInterference Information Getting Started Table of ContentsTitle IntroductionApplications Operating the Meter Using the Computer InterfaceAppendices MaintenanceTitle List of TablesPerformance Tests for A Current Functions Replacement PartsPerformance Tests for mA Current Functions Title List of FiguresWWarning IntroductionChapter Introducing the Fluke 45 Dual Display MultimeterChapter 1 Introduction Options and AccessoriesWhere to go from Here Appendices Chapter 6 MaintenanceChapter 2 Getting started Chapter 4 ApplicationsPage MULTIMETER SAFETY WWARNINGTO AVOID ELECTRICAL SHOCK OR OTHER INJURY Introduction Adjusting the HandleLine Power Getting StartedFigure 2-2.Rear Panel Figure 2-1.Front PanelTurning the Meter on Using the PushbuttonsFigure 2-4.Summary of Basic Pushbutton Operations WWarning Selecting a Measurement RangeAutomatic Input Terminal Selection Taking Some Basic MeasurementsMeasuring Current Diode/Continuity TestingMeasuring Voltage, Resistance, or Frequency Taking Some Basic Measurements FREQFREQ Getting StartedNote This is a Diode Test Function Figure 2-7.Continuity TestingFigure 2-8.Diode Testing CIRCUITOperating the Meter Under Battery Power Optional Operating the Meter Under Battery Power OptionalRack Mounting 2-10 Introduction Operating the Meter From the Front PanelFront Panel Operations ChapterSecondary Display DisplayPrimary Display MIN HOLD REMOTE SMFMAX dB REL AUTO EXT TRGFigure 3-4.Input Terminals Input TerminalsAutoranging Selecting a Measurement FunctionRanging E, U, TFigure 3-5.Function Selection Buttons Ranging Operating the Meter From the Front PanelFrequency Ranging Measuring FrequencyManual Ranging Measuring Frequency Frequency Measurement RatesFrequency Sensitivity Selection Operating the Meter From the Front PanelK, I, H, J Selecting A Function ModifierSelecting A Function Modifier REL Relative Readings ModifierWWarning Operating the Meter From the Front PaneldB Decibels and Audio Power Modifier MN MX Minimum Maximum Modifier Using Function Modifiers in CombinationHOLD Touch Hold Modifier Selecting A Measurement Rate Rate Using the SButtonPushbuttons Operating the Meter From the Front PanelSelecting A Function Modifier 3-15The List and Number Editors Using The Compare Comp FunctionUsing the List Editor Using the Number Editor Changing the Power-UpConfiguration Power-UpConfigurationFactory Settings of Power-UpConfiguration Calibration Introduction Using the Dual DisplayApplications ChapterUsing Measurement Functions in Combination Applications Using the Dual DisplayResponse Times How the Meter Makes Dual Display Measurements How the Meter Makes Dual Display MeasurementsMeas Function External Trigger Update Rate in the Dual Display ModeThermal Voltages Correcting for Test Lead Resistance When Measuring ResistanceTwo-WireConfiguration True RMS MeasurementsCalculated AC + DC RMS Measurements Effects of Internal Noise in AC Measurements4-11 Figure 4-3.Waveform Comparison ChartApplications True RMS Measurements4-12 Chapter Operating the Meter Using the Computer InterfaceLocal and Remote Operations Computer InterfacesSetting Communication Parameters RS-232 RS-232 Print-OnlyMode RS-232Prompts Device Clear Using C CNTRL CCabling the Meter to a Host or Printer RS-232 Character Echoing and DeletionAddressing the Meter Installing the IEEE-488InterfaceIEEE-488Operating Limitations Enabling the IEEE-488InterfaceCabling the Meter to a Host Getting Started With An Installation TestInstallation Test for RS-232Operations Installation Test for IEEE-488OperationsInput Terminators How the Meter Processes InputIf Test Fails Input StringsSending Numeric Values to the Meter Sending Command Strings to the MeterTypical IEEE-488Input Strings 1.Commands to configure the meter if any Figure 5-1.Typical IEEE-488Input Strings 5-10External Triggering from the Front Panel How the Meter Processes OutputTriggering Output External Triggering via the Computer Interface Setting the Trigger Type ConfigurationTable 5-3.Trigger Type Enable Register Event Status Enable RegisterRead Command Write CommandPage 7 6 5 4 Event Status and Event Status Enable RegistersReading the Status Byte Register Status Byte RegisterService Request Enable Register IEEE-488Capabilities and Common Commands Computer Interface Command SetTable 5-8. IEEE-488Interface Function Subsets Table 5-9. IEEE-488Common CommandsCommand 5-20Command Operating the Meter Using the Computer InterfaceComputer Interface Command Set Table 5-10. IEEE-488Common Commands contCommands Function Commands and QueriesFunction Modifier Commands and Queries Table 5-11.Function Commands and QueriesTable 5-12.Function Modifier Commands and Queries Operating the Meter Using the Computer InterfaceComputer Interface Command Set CommandDescription Command5-24 5-25 Range and Measurement Rate Commands and QueriesOperating the Meter Using the Computer Interface Computer Interface Command Set5-26 Measurement QueriesTRIGGER 5, unexpected results will be obtained Trigger Configuration Commands Compare Commands and Queries5-28 Miscellaneous Commands and QueriesCommand Table 5-17.Miscellaneous Commands and QueriesCommand RS-232Remote/Local ConfigurationsOperating the Meter Using the Computer Interface Computer Interface Command Setaam23f.eps Sample Program Using the RS-232Computer Interface5-30 aam24s.tif Operating the Meter Using the Computer Interface5-31 aam25s.tif 5-32aam26s.tif Operating the Meter Using the Computer Interface5-33 aam27s.tif 5-345-35 Operating the Meter Using the Computer InterfaceWWarning MaintenanceCleaning Line FuseCurrent Input Fuses Testing Current Input FusesWWarning Replacing the 100 mA Input FuseReplacing the 10 A Input Fuse WWarningPerformance Tests Self-TestDiagnostics and Error CodesService Frequency FunctionRange Rate Input LevelQuantity Fluke Part Number Part Description Replacement PartsMaintenance Replacement PartsFLUKE PART NO Table 6-5.Replacement Parts cont DESCRIPTIONSpecifications AppendicesAppendix PagePage RS-232and IEEE-488Reading Transfer Rates SpecificationsAppendix A Display Counts and Reading RatesCommon Mode Rejection Ratio DC VoltageInput Impedance Normal Mode Rejection RatioMaximum Input Decibel ResolutionTrue RMS AC Voltage, AC-Coupled AppendicesInput Impedance Decibel Reference ResistanceMaximum Crest Factor AC + DC Voltage AccuracyMaximum Input DC CurrentAC Current AppendicesRangeFrequency AccuracyMaximum Crest Factor Maximum InputInput Protection OhmsDiode Test/Continuity Open Circuit VoltageOpen Circuit Voltage FrequencySensitivity of AC Voltage Sensitivity Level of AC CurrentAppendices EnvironmentalSpecifications A Options GeneralAppendix B ASCII/IEEE-488Bus CodesPage ASCII/IEEE-488Bus Codes B AppendicesIntroduction IEEE-488.2Device Documentation RequirementsAppendix C Implementation of IEEE StandardNUMERIC RESPONSE DATA All queries generate a response when parsedNo commands are coupled Device-specificcommands usedVolts dc Format 1 NR3 NUMERIC RESPONSE DATAFormat 2 NR3 NUMERIC RESPONSE DATA UNIT MEASUREMENTThere are no additional data structures The *RDT and *RAT? commands are not implemented