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Fluke 45 Frequency, Sensitivity of AC Voltage, Sensitivity Level of AC Current, Input Protection

Models: 45

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Frequency

45

Users Manual

Open Circuit Voltage

3.2V maximum Continuity Capture Time

50 us maximum, 10 us typical

Input Protection

500 volts dc or rms ac

Note

When the meter is set to measure frequency and there is no input signal (i.e., input terminals are open), the meter may read approximately 25 kHz (rather than the expected zero). This is due to internal capacitive pickup of the inverter power supply into the high-impedance, input circuitry. With source impedance of <2 kΩ , this pickup will not affect the accuracy or stability of the frequency a reading.

Frequency

Frequency Range

5 Hz to >1 MHz

Applicable Functions

Volts ac and Current AC

Range

Resolution

Accuracy

1000 Hz

10kHz

100kHz

1000 kHz

1MHz*

Slow & Medium

.01 Hz

.1 Hz

1Hz

10Hz

100Hz

Fast

.1 Hz

1Hz

10Hz

100Hz

1kHz

05% + 2

.05% + 1

.05% + 1

.05% + 1 Not Specified

* Specified to 1 MHz, but will measure above 1 MHz.

Sensitivity of AC Voltage

Frequency

5Hz-100 kHz

100kHz - 300 kHz

300kHz - 1 MHz Above 1 MHz

Level (sine wave)

30 mV rms

100 mV rms

1 V V rms

Not specified

Sensitivity Level of AC Current

Frequency	Input

5 Hz-20 kHz	100 mA
45 Hz-2 kHz	10 A

Level

>3 mA rms

>3 A rms

Image 109

Fluke 45 Frequency, Sensitivity of AC Voltage, Sensitivity Level of AC Current, Open Circuit Voltage, Input Protection

Contents

Dual Display Multimeter LIMITED WARRANTY & LIMITATION OF LIABILITY Interference Information Safety ClassDeclaration of the Manufacturer or Importer Title Table of ContentsIntroduction Getting StartedApplications Operating the Meter Using the Computer InterfaceAppendices MaintenanceTitle List of TablesPerformance Tests for mA Current Functions Replacement PartsPerformance Tests for A Current Functions Title List of FiguresChapter IntroductionIntroducing the Fluke 45 Dual Display Multimeter WWarningWhere to go from Here Options and AccessoriesChapter 1 Introduction Chapter 2 Getting started Chapter 6 MaintenanceChapter 4 Applications AppendicesPage TO AVOID ELECTRICAL SHOCK OR OTHER INJURY WWARNINGMULTIMETER SAFETY Line Power Adjusting the HandleGetting Started IntroductionFigure 2-2.Rear Panel Figure 2-1.Front PanelTurning the Meter on Using the PushbuttonsFigure 2-4.Summary of Basic Pushbutton Operations Automatic Input Terminal Selection Selecting a Measurement RangeTaking Some Basic Measurements WWarningMeasuring Voltage, Resistance, or Frequency Diode/Continuity TestingMeasuring Current FREQ FREQGetting Started Taking Some Basic MeasurementsFigure 2-8.Diode Testing Figure 2-7.Continuity TestingCIRCUIT Note This is a Diode Test FunctionRack Mounting Operating the Meter Under Battery Power OptionalOperating the Meter Under Battery Power Optional 2-10 Front Panel Operations Operating the Meter From the Front PanelChapter IntroductionPrimary Display DisplaySecondary 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 Ranging Operating the Meter From the Front PanelManual Ranging Measuring FrequencyFrequency 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 HOLD Touch Hold Modifier Using Function Modifiers in CombinationMN MX Minimum Maximum 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 Factory Settings of Power-UpConfiguration Power-UpConfigurationChanging the 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 External 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 4-114-12 Local 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 TerminatorsTypical IEEE-488Input Strings Sending Command Strings to the MeterSending Numeric Values to the Meter 1.Commands to configure the meter if any Figure 5-1.Typical IEEE-488Input Strings 5-10Triggering Output How the Meter Processes OutputExternal Triggering from the Front Panel External Triggering via the Computer Interface Setting the Trigger Type ConfigurationTable 5-3.Trigger Type Read Command Event Status Enable RegisterWrite Command Enable RegisterPage 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 SetCommand Table 5-9. IEEE-488Common Commands5-20 Table 5-8. IEEE-488Interface Function SubsetsComputer 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 CommandDescription Operating 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 Trigger 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 Interfaceaam23f.eps 5-31 Operating the Meter Using the Computer Interfaceaam24s.tif aam25s.tif 5-325-33 Operating the Meter Using the Computer Interfaceaam26s.tif aam27s.tif 5-345-35 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 Range Rate FunctionInput Level FrequencyMaintenance Replacement PartsReplacement Parts Quantity Fluke Part Number Part DescriptionFLUKE PART NO Table 6-5.Replacement Parts cont DESCRIPTIONAppendix AppendicesPage SpecificationsPage 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 RangeFrequencyDiode Test/Continuity OhmsOpen Circuit Voltage Input ProtectionSensitivity of AC Voltage FrequencySensitivity Level of AC Current Open Circuit VoltageSpecifications A EnvironmentalAppendices Options GeneralAppendix B ASCII/IEEE-488Bus CodesPage ASCII/IEEE-488Bus Codes B AppendicesAppendix C IEEE-488.2Device Documentation RequirementsImplementation of IEEE Standard IntroductionNo commands are coupled All queries generate a response when parsedDevice-specificcommands used NUMERIC RESPONSE DATAFormat 2 NR3 NUMERIC RESPONSE DATA UNIT Format 1 NR3 NUMERIC RESPONSE DATAMEASUREMENT Volts dcThere are no additional data structures The *RDT and *RAT? commands are not implemented