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Fluke 45 user manual Primary Display, Secondary Display

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Display

45

Users Manual

Display

The meter has a 5-digit, vacuum-fluorescent, dual display. This display shows measure- ment readings, annunciators, and messages. The annunciators indicate measurement units and the meters operating configuration.

The dual display allows you to see two properties (e.g., volts ac and frequency) of the input signal you are measuring. Readings are taken and displayed in an alternating fashion. That is, a reading is taken of one property of the input and sent to a display; then a reading of the other property is taken and sent to the other display. (For more detail, see "How the Meter makes Dual Display Measurements" in Chapter 4.)

The display flashes when a measurement exceeds 1000 V dc or 750 V ac, the maximum rated input level. If an input exceeds the full scale value of the selected range, the overload annunciator (OL) is displayed.

Primary Display

The primary display (shown in Figure 3-1) consists of the larger digits and annunciators (see Figure 3-2) and is located on the left side of the front panel. Readings using the rela- tive (REL), minimum maximum (MN MX), Touch Hold (HOLD), or decibels (dB) modifiers can be shown on the primary display only.

Secondary Display

The secondary display consists of a set of smaller digits on the right side of the dual dis- play (see Figure 3-3).

Press Sto turn the secondary display on and off. A series of five dashes is shown in the secondary display when the secondary display has been turned on but a function has not yet been selected.

45 DUAL DISPLAY MULTIMETER

REMOTE	SMF	MAX dB REL AUTO
EXT TRG		MIN HOLD			mA
EXT TRG		MIN HOLD

					mVDCAC
					Mk Hz

aam09f.eps

Figure 3-1. Primary Display

3-2

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Fluke 45 user manual Primary Display, Secondary Display

Contents

Users Manual Dual Display MultimeterLIMITED WARRANTY & LIMITATION OF LIABILITY Declaration of the Manufacturer or Importer Safety ClassInterference Information Page Title Table of ContentsIntroduction Getting StartedApplications Operating the Meter Using the Computer InterfaceAppendices MaintenancePage Title List of TablesTable Performance Tests for mA Current Functions Replacement PartsPerformance Tests for A Current Functions Users ManualTitle List of FiguresFigure Chapter IntroductionIntroducing the Fluke 45 Dual Display Multimeter WWarningChapter 1: Introduction Options and AccessoriesWhere to go from Here Chapter 2: Getting started Chapter 6: MaintenanceChapter 4: Applications AppendicesUsers Manual MULTIMETER SAFETY WWARNINGTO AVOID ELECTRICAL SHOCK OR OTHER INJURY Page Line Power Adjusting the HandleGetting Started IntroductionFigure 2-2.Rear Panel Users ManualFigure 2-1.Front Panel Turning the Meter on Using the PushbuttonsFigure 2-4.Summary of Basic Pushbutton Operations Users ManualAutomatic Input Terminal Selection Selecting a Measurement RangeTaking Some Basic Measurements WWarningMeasuring Current Diode/Continuity TestingMeasuring Voltage, Resistance, or Frequency FREQ FREQGetting Started Taking Some Basic MeasurementsFigure 2-8.Diode Testing Figure 2-7.Continuity TestingUsers Manual CIRCUITOperating the Meter Under Battery Power Optional Operating the Meter Under Battery Power OptionalRack Mounting Users Manual 2-10Front Panel Operations Operating the Meter From the Front PanelChapter IntroductionSecondary Display DisplayPrimary Display MAX dB REL AUTO REMOTE SMFEXT TRG MIN HOLDFigure 3-4.Input Terminals Input TerminalsRanging Selecting a Measurement FunctionE, U, T AutorangingFigure 3-5.Function Selection Buttons Users ManualRanging Operating the Meter From the Front PanelFrequency Ranging Measuring FrequencyManual Ranging Frequency Sensitivity Selection Frequency Measurement RatesOperating the Meter From the Front Panel Measuring FrequencyK, I, H, J Selecting A Function ModifierWWarning REL Relative Readings ModifierOperating the Meter From the Front Panel Selecting A Function ModifierdB 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 SButtonSelecting A Function Modifier Operating the Meter From the Front Panel3-15 PushbuttonsThe 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 Applications Using the Dual DisplayChapter IntroductionUsing 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 Users ManualExternal Trigger Update Rate in the Dual Display ModeThermal Voltages Two-WireConfiguration When Measuring ResistanceTrue RMS Measurements Correcting for Test Lead ResistanceCalculated AC + DC RMS Measurements Effects of Internal Noise in AC MeasurementsApplications Figure 4-3.Waveform Comparison ChartTrue RMS Measurements 4-11Users Manual 4-12Local and Remote Operations Operating the Meter Using the Computer InterfaceComputer Interfaces ChapterSetting Communication Parameters RS-232 RS-232 Print-OnlyMode Cabling the Meter to a Host or Printer RS-232 Device Clear Using ^C CNTRL CCharacter Echoing and Deletion RS-232PromptsIEEE-488Operating Limitations Installing the IEEE-488InterfaceEnabling the IEEE-488Interface Addressing the MeterInstallation Test for RS-232Operations Getting Started With An Installation TestInstallation Test for IEEE-488Operations Cabling the Meter to a HostIf Test Fails How the Meter Processes InputInput Strings Input TerminatorsSending 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 5-10Users Manual External 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 Read Command Event Status Enable RegisterWrite Command Enable Register& & & & 7 6 5 4 3 2 1 & & & & & & & & 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 SetCommand Table 5-9. IEEE-488Common Commands5-20 Users ManualComputer Interface Command Set Operating the Meter Using the Computer InterfaceTable 5-10. IEEE-488Common Commands cont CommandFunction Modifier Commands and Queries Function Commands and QueriesTable 5-11.Function Commands and Queries CommandsComputer Interface Command Set Operating the Meter Using the Computer InterfaceCommand Table 5-12.Function Modifier Commands and Queries5-24 CommandUsers Manual DescriptionOperating the Meter Using the Computer Interface Range and Measurement Rate Commands and QueriesComputer Interface Command Set 5-25TRIGGER 5, unexpected results will be obtained Measurement Queries5-26 Users ManualTrigger Configuration Commands Compare Commands and QueriesCommand Miscellaneous Commands and QueriesTable 5-17.Miscellaneous Commands and Queries 5-28Operating the Meter Using the Computer Interface RS-232Remote/Local ConfigurationsComputer Interface Command Set Command5-30 Sample Program Using the RS-232Computer InterfaceUsers Manual aam23f.epsaam24s.tif Operating the Meter Using the Computer Interface5-31 aam25s.tif 5-32Users Manual aam26s.tif Operating the Meter Using the Computer Interface5-33 aam27s.tif 5-34Users Manual 5-35 Operating the Meter Using the Computer InterfaceCleaning MaintenanceLine Fuse WWarningCurrent Input Fuses Testing Current Input FusesReplacing the 10 A Input Fuse Replacing the 100 mA Input FuseWWarning WWarningPerformance Tests Self-TestDiagnostics and Error CodesService Function Users ManualRange Rate Input LevelMaintenance Replacement PartsReplacement Parts •Quantity •Fluke Part Number •Part DescriptionUsers Manual Table 6-5.Replacement Parts cont DESCRIPTIONITEM FLUKE PART NOAppendix AppendicesPage SpecificationsUsers Manual Appendix A SpecificationsDisplay Counts and Reading Rates RS-232and IEEE-488Reading Transfer RatesInput Impedance DC VoltageNormal Mode Rejection Ratio Common Mode Rejection RatioTrue RMS AC Voltage, AC-Coupled Decibel ResolutionAppendices Maximum InputMaximum Crest Factor Decibel Reference ResistanceAC + DC Voltage Accuracy Input ImpedanceAC Current DC CurrentAppendices Maximum InputMaximum Crest Factor AccuracyMaximum Input Users ManualDiode Test/Continuity OhmsOpen Circuit Voltage Input ProtectionSensitivity of AC Voltage FrequencySensitivity Level of AC Current Open Circuit VoltageAppendices EnvironmentalSpecifications A Users Manual GeneralOptions Appendix B ASCII/IEEE-488Bus CodesUsers Manual ASCII/IEEE-488Bus Codes B AppendicesPage Appendix C IEEE-488.2Device Documentation RequirementsImplementation of IEEE Standard IntroductionNo commands are coupled All queries generate a response when parsedDevice-specificcommands used NUMERIC RESPONSE DATA>•Format 2: <NR3 NUMERIC RESPONSE DATA> < UNIT> •Format 1: <NR3 NUMERIC RESPONSE DATA>MEASUREMENT Volts dcThere are no additional data structures The *RDT and *RAT? commands are not implemented