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Fluke 45 user manual Maintenance, Cleaning, Line Fuse, WWarning, Chapter, Introduction

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Chapter 6

Maintenance

Note

When servicing the meter, use only the replacement parts specified.

Introduction

Chapter 6 provides the information necessary for the user to perform basic maintenance. Users should not attempt to perform maintenance not described in this chapter. Qualified service personnel should refer to the 45 Service Manual (P/N 856042) for complete main- tenance, service, and calibration procedures.

Cleaning

WWarning

To avoid electrical shock or damage to the meter, never get water inside the case.

Caution

To avoid damaging the meters housing, never apply solvents to the meter.

If the meter requires cleaning, wipe it down with a cloth that is lightly dampened with water or a mild detergent. Do not use aromatic hydrocarbons, chlorinated solvents, or methanol-based fluids when wiping down the meter.

Line Fuse

The meter has a T 125mA, 250V, (Slow blow) line fuse in series with the power supply. This fuse is located on the rear panel. To replace this fuse, unplug the line cord and remove the fuse holder with fuse as shown in Figure 6-1. The meter is shipped with a replacement fuse.

WWarning

To avoid electric shock or fire, do not use makeshift fuses or short-circuit the fuse holder.

6-1

Image 95

Fluke 45 user manual Maintenance, Cleaning, Line Fuse, WWarning, Chapter, Introduction

Contents

Users Manual Dual Display MultimeterLIMITED WARRANTY & LIMITATION OF LIABILITY Declaration of the Manufacturer or Importer Safety ClassInterference Information Page Getting Started Table of ContentsTitle IntroductionApplications Operating the Meter Using the Computer InterfaceAppendices MaintenancePage Title List of TablesTable Users Manual Replacement PartsPerformance Tests for mA Current Functions Performance Tests for A Current FunctionsTitle List of FiguresFigure WWarning 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 Page Introduction Adjusting the HandleLine Power Getting StartedFigure 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 ManualWWarning 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 StartedCIRCUIT Figure 2-7.Continuity TestingFigure 2-8.Diode Testing Users ManualOperating the Meter Under Battery Power Optional Operating the Meter Under Battery Power OptionalRack Mounting Users Manual 2-10Introduction 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 Users ManualRanging 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 Users ManualExternal 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 MeasurementsUsers Manual 4-12Chapter 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 5-10Users 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 Enable Register Event Status Enable RegisterRead Command Write Command& & & & 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 SetUsers Manual 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 Users Manual5-25 Range and Measurement Rate Commands and QueriesOperating the Meter Using the Computer Interface Computer Interface Command SetUsers Manual Measurement QueriesTRIGGER 5, unexpected results will be obtained 5-26Trigger 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 Users Manualaam24s.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 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 Input Level Users ManualFunction Range Rate•Quantity •Fluke Part Number •Part Description Replacement PartsMaintenance Replacement PartsFLUKE PART NO Table 6-5.Replacement Parts cont DESCRIPTIONUsers Manual ITEMSpecifications 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 AppendicesUsers Manual 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 Users Manual GeneralOptions Appendix B ASCII/IEEE-488Bus CodesPage ASCII/IEEE-488Bus Codes B AppendicesPage Introduction 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 DATA>•Format 2: <NR3 NUMERIC RESPONSE DATA> < UNIT> MEASUREMENTThere are no additional data structures The *RDT and *RAT? commands are not implemented