Fluke 45 Selecting a Function Modifier, Maximum Sinewave Inputs for Frequency Measurements Range

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45

Users Manual

Table 3-7. Maximum Sinewave Inputs for Frequency Measurements

Range

300mV

3V

30V

300V

750V

Maximim Input Voltage

1 V rms

6 V rms

60 V rms

750 V rms

750 V rms

The input signal sensitivity is listed under the frequency specifications in Appendix A. These values are based on sine waveforms. The signal level must be increased for lower crest factor inputs (the crest factor is the ratio of the peak voltage to the ac rms voltage of the waveform). If the input signal is below the required level, the frequency will be displayed as zero. If the measurements are unstable, the input signal may be near the threshold level.

Selecting A Function Modifier

(K, I, H, J)

Selecting a function modifier (see Figure 3-7) causes the meter to perform an action on an input (e.g., convert to decibels or compare to another value) before a reading is displayed. Function modifiers can be used in combination. (See “Using Function Modifiers in Combination," later in Chapter 3.)

To use a function modifier, press a function button to select a primary function, then press a function modifier button (or buttons). Modified readings are shown only on the primary display.

After a function modifier has been selected, pressing any (white) function button turns off all modifiers, causes the secondary display to go blank, and returns unmodified readings to the primary display.

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Contents Dual Display Multimeter Limited Warranty & Limitation of Liability Declaration of the Manufacturer or Importer Table of Contents Applications Appendices List of Tables Page List of Figures Introduction Introducing the Fluke 45 Dual Display MultimeterWhere to go from Here Options and AccessoriesModel Accessories Description Maintenance Appendices Page Multimeter Safety Introduction Getting StartedFront Panel Using the Pushbuttons Turning the Meter onSummary of Basic Pushbutton Operations Automatic Input Terminal Selection Selecting a Measurement RangeTaking Some Basic Measurements Measuring Voltage, Resistance, or Frequency Diode/Continuity TestingMeasuring Current Freq Continuity Testing Operating the Meter Under Battery Power Optional Rack MountingPage Operating the Meter From the Front Panel Front Panel OperationsPrimary Display DisplaySecondary Display Remote SMF Input Terminals Input TerminalsAutoranging Selecting a Measurement FunctionRanging Input LimitsFunction Buttons Medium Reading Rate Range Full Scale Slow Reading Rate Range Full ScaleOhms Ranges and Full Scale Values Fast Reading Rate Frequency Ranges and Full Scale Values Slow and MediumManual Ranging Measuring FrequencyFrequency Ranging Frequency Sensitivity Selection Frequency Measurement RatesMeasuring Frequency of Current 100 mA and 10A Inputs Frequency Measurement RatesMaximum Sinewave Inputs for Frequency Measurements Range Selecting a Function ModifierMaximim Input Voltage REL Relative Readings Modifier Function Modifier Selection ButtonsDB Decibels and Audio Power Modifier Reference Impedances in OhmsHold Touch Hold Modifier Using Function Modifiers in CombinationMN MX Minimum Maximum Modifier Using the SButton Selecting a Measurement Rate RatePushbuttons 10. SButton OperationsUsing The Compare Comp Function List and Number EditorsUsing the List Editor Using the Number Editor Factory Settings of Power-Up Configuration Power-Up ConfigurationChanging the Power-Up Configuration Configurations 13. Power-Up Configuration Set at Factory ParameterCalibration Using the Dual Display ApplicationsUsing Measurement Functions in Combination Dual Display Showing Volts AC and FrequencySample Dual Display Applications Primary Display ApplicationsDC Voltage and DC Current Measurement on Input Signal Response TimesHow the Meter Makes Dual Display Measurements Slow Rate Auto Single Range1 Range2 Medium Rate Fast Rate Slow Med FastUpdate Rate in the Dual Display Mode External TriggerThermal Voltages AllTrue RMS Measurements When Measuring ResistanceTwo-Wire Configuration Correcting for Test Lead ResistanceCalculated AC + DC RMS Measurements Effects of Internal Noise in AC MeasurementsWaveform Comparison True RMS vs. Average-Responding Meters True RMS Measurements Page Local and Remote Operations Computer InterfacesFactory Setting Setting Communication Parameters RS-232Factory Settings of RS-232 Communication Parameters Preparing the Meter for Operations via the RS-232 InterfaceRS-232 Print-Only Mode Character Echoing and Deletion Device Clear Using C Cntrl CCabling the Meter to a Host or Printer RS-232 RS-232 PromptsIEEE-488 Operating Limitations Installing the IEEE-488 InterfacePreparing the Meter to be Operated via IEEE-488 Interface Enabling the IEEE-488 InterfaceInstallation Test for IEEE-488 Operations Getting Started With An Installation TestInstallation Test for RS-232 Operations Cabling the Meter to a HostInput Strings How the Meter Processes InputIf Test Fails Input TerminatorsTypical IEEE-488 Input Strings Sending Command Strings to the MeterSending Numeric Values to the Meter Page Typical IEEE-488 Input Strings Triggering Output How the Meter Processes OutputExternal Triggering from the Front Panel Setting the Trigger Type Configuration External Triggering via the Computer InterfaceTrigger Type Service Requests IEEE-488 Only and Status RegistersSettling Delay Rear TriggerEnable Register Read CommandWrite Command Status Register SummaryESB MAV 3 2 1 Event Status and Event Status Enable Registers Event Status and Event Status Enable RegistersDescription of Bits in ESR and ESE Bit No Name Status Byte RegisterReading the Status Byte Register True Set to 1 ConditionsDescription of Bits in the Status Byte Register Bit No Name Service Request Enable RegisterTrue Set to 1 Condition Computer Interface Command Set IEEE-488 Capabilities and Common CommandsIEEE-488 Common Commands IEEE-488 Interface Function Subsets10. IEEE-488 Common Commands Number StateFunction Modifier Commands and Queries Function Commands and Queries11. Function Commands and Queries Primary Secondary Display 12A. Reference Impedance Values Ref Impedance Command12. Function Modifier Commands and Queries Description Value Ref ImpedanceMIN Current Range Range and Measurement Rate Commands and QueriesOhms Range Frequency RangeMeasurement Queries 13. Range and Measurement Rate Commands and Queries14. Measurement Queries Description 15. Compare Commands and Queries Description Compare Commands and QueriesTrigger Configuration Commands 16. Trigger Configuration Commands Description16A. Measurement Units Output with Format Miscellaneous Commands and Queries17. Miscellaneous Commands and Queries Description Measurement FunctionRS-232 Remote/Local Configurations 18. Remote/Local Configuration Commands DescriptionSample Program Using the RS-232 Computer Interface Sample Program for RS-232 Computer InterfaceSample Programs Using the IEEE-488 Computer Interface Sample Programs for IEEE-488 Computer InterfaceAam25s.tif Aam26s.tif Aam27s.tif Operating the Meter Using the Computer Interface Introduction Cleaning Line FuseTesting Current Input Fuses Current Input FusesReplacing the 10 a Input Fuse Replacing the 100 mA Input FuseFront Panel Input Terminal Error No Self-Test Error Codes Meaning Self-Test Diagnostics and Error CodesPerformance Tests Frequency ServiceInput Level Min MaxUsing decades 300 Ω Short 30 kΩ Performance Tests for mA Current Functions Replacement PartsReplacement Parts Min Max 29.982 30.018TM1 TM2 TM3 TM4 TM5 Appendices Page RS-232 and IEEE-488 Reading Transfer Rates Display Counts and Reading RatesResponse Times DC Voltage Normal Mode Rejection RatioCommon Mode Rejection Ratio Input ImpedanceMaximum Input Decibel ResolutionTrue RMS AC Voltage, AC-Coupled AccuracyDecibel Reference Resistance Maximum Crest Factor Common Mode Rejection RatioAC + DC Voltage Accuracy Range Slow DC CurrentAC Current AccuracyMaximum Crest Factor Maximum Input RangeFrequency Slow Accuracy Medium FastOhms Diode Test/ContinuitySensitivity of AC Voltage FrequencySensitivity Level of AC Current Environmental General OptionsASCII/IEEE-488 Bus Codes Page ASCII/IEEE-488 Bus Codes B IEEE-488.2 Device Documentation Requirements Implementation of Ieee StandardNumeric Response Data Measurement *RDT and *RAT? commands are not implemented
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45 specifications

The Fluke 45 is a versatile and high-precision Digital Multimeter that is designed for a wide range of applications in electrical testing, troubleshooting, and maintenance. Known for its reliability and advanced features, the Fluke 45 is an essential tool for engineers, technicians, and professionals who require accurate measurement capabilities.

One of the standout features of the Fluke 45 is its ability to measure both AC and DC voltage and current. With a maximum input voltage of 1000 volts and current ranges up to 10 amps, users can conduct a variety of electrical tests with confidence. The device is equipped with an intuitive dual display, allowing for simultaneous viewing of multiple measurements. This feature enhances usability during complex diagnostics.

The Fluke 45 also boasts an impressive resolution of 0.1 mV and a basic accuracy of 0.25%, which translates to highly reliable readings. The auto-ranging capability simplifies the measurement process, automatically selecting the appropriate range based on the input signal, thus saving time and reducing user error.

In addition to voltage and current measurements, the Fluke 45 features resistance measurement capabilities, with a range of up to 40 MΩ. This makes it an effective tool for testing circuits, identifying faults, and ensuring the integrity of electrical systems. The continuity test function, complete with a built-in beeper, assists in quickly diagnosing wiring issues.

Another remarkable characteristic of the Fluke 45 is its frequency measurement capabilities, which can measure frequencies up to 1 MHz. This is particularly useful in applications involving signal analysis and troubleshooting oscillators.

Moreover, the Fluke 45 is designed with user convenience in mind. It is lightweight and portable, making it easy to carry around, whether on a job site or in a workshop. The rugged construction, reinforced with high-quality materials, ensures it can withstand harsh conditions often encountered in the field.

To enhance functionality, the Fluke 45 features a data hold function that freezes the displayed measurement for easier reporting. Additionally, it can store data for later retrieval, making it convenient for users who need to compile test results over time.

In summary, the Fluke 45 Digital Multimeter is an advanced instrument that combines precision, versatility, and user-friendly design. Its wide measurement capabilities, high accuracy, and durable build make it an invaluable tool for professionals in diverse electrical and electronic applications. Whether for routine maintenance or complex troubleshooting, the Fluke 45 stands out as a reliable partner in achieving accurate and efficient results.
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