Fluke 45 user manual Min

Page 80

45

Users Manual

Command

MAXSET <numeric value>

MIN

MINSET <numeric value>

MMCLR

MOD?

REL

RELCLR

RELSET <relative base>

RELSET?

Table 5-12. Function Modifier Commands and Queries (cont.)

Description

Meter enters MN MX modifier with <numeric value> as the maximum value.<numeric value> can be a signed integer, signed real number without exponent, or signed real number with exponent. Autoranging is disabled. See "MN MX Modifier" in Chapter 3.

If <numeric value> exceeds the measurement range, an Execution Error is generated.

Meter enters MN MX modifier with present reading as minimum value. If already in MN MX modifier, meter displays minimum value. In MN MX modifier, autoranging is disabled. See "MN MX Modifier" in Chapter 3.

Meter enters MN MX modifier with <numeric value> as the minimum value. <numeric value> can be a signed integer, signed real number without exponent, or signed real number with exponent. Autoranging is disabled. See "MN MX Modifier" in Chapter 3.

If <numeric value> exceeds the measurement range, an Execution Error is generated.

Meter exits the MN MX modifier. The stored minimum and maximum values are lost, and the meter returns to the ranging mode and range selected prior to selecting MN MX modifier.

Note

When the MN MX modifier is selected, you can toggle between displaying the minimum and maximum reading without losing the minimum and maximum values stored.

Meter returns a numeric value indicating modifiers in use. 1 = MN, 2 = MX, 4=HOLD, 8=dB, 16=dB Power, 32=REL, 64=COMP.

If multiple modifiers are selected, the value returned is equal to the sum of the values of the selected modifiers. For example, if dB and REL are selected, "40" is returned.

Meter enters the relative (REL) modifier, using the value shown on the primary display as the relative base. Autoranging is disabled. See "REL Modifier" in Chapter 3 for more on the relative modifier.

Meter exits the relative modifier and returns to the ranging mode and range selected prior to selecting the relative modifier.

Meter enters the relative (REL) modifier, using <relative base> as the offset <relative base> value.

<relative base> can be a signed integer, signed real number without exponent, or signed real number with exponent. Autoranging is disabled.

If <relative base> exceeds the measurement range, an Execution Error is generated. See "REL Modifier" in Chapter 3 for more on the relative modifier.

Meter returns <relative base>. If the relative modifier has not been selected, an Execution Error is generated.

5-24

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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 MultimeterModel Accessories Description Options and AccessoriesWhere to go from Here Maintenance Appendices Page Multimeter Safety Introduction Getting StartedFront Panel Using the Pushbuttons Turning the Meter onSummary of Basic Pushbutton Operations Taking Some Basic Measurements Selecting a Measurement RangeAutomatic Input Terminal Selection Measuring Current Diode/Continuity TestingMeasuring Voltage, Resistance, or Frequency Freq Continuity Testing Operating the Meter Under Battery Power Optional Rack MountingPage Operating the Meter From the Front Panel Front Panel OperationsSecondary Display DisplayPrimary Display Remote SMF Input Terminals Input TerminalsSelecting a Measurement Function RangingAutoranging Input LimitsFunction Buttons Slow Reading Rate Range Full Scale Ohms Ranges and Full Scale Values Fast Reading RateMedium Reading Rate Range Full Scale Frequency Ranges and Full Scale Values Slow and MediumFrequency Ranging Measuring FrequencyManual Ranging Frequency Measurement Rates Measuring Frequency of Current 100 mA and 10A InputsFrequency Sensitivity Selection Frequency Measurement RatesMaximim Input Voltage Selecting a Function ModifierMaximum Sinewave Inputs for Frequency Measurements Range REL Relative Readings Modifier Function Modifier Selection ButtonsDB Decibels and Audio Power Modifier Reference Impedances in OhmsMN MX Minimum Maximum Modifier Using Function Modifiers in CombinationHold Touch Hold 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 Changing the Power-Up Configuration Power-Up ConfigurationFactory Settings of Power-Up Configuration Calibration 13. Power-Up Configuration Set at Factory ParameterConfigurations 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 AllWhen Measuring Resistance Two-Wire ConfigurationTrue RMS Measurements Correcting for Test Lead ResistanceWaveform Comparison True RMS vs. Average-Responding Meters Effects of Internal Noise in AC MeasurementsCalculated AC + DC RMS Measurements True RMS Measurements Page Local and Remote Operations Computer InterfacesSetting Communication Parameters RS-232 Factory Settings of RS-232 Communication ParametersFactory Setting Preparing the Meter for Operations via the RS-232 InterfaceRS-232 Print-Only Mode Device Clear Using C Cntrl C Cabling the Meter to a Host or Printer RS-232Character Echoing and Deletion RS-232 PromptsInstalling the IEEE-488 Interface Preparing the Meter to be Operated via IEEE-488 InterfaceIEEE-488 Operating Limitations Enabling the IEEE-488 InterfaceGetting Started With An Installation Test Installation Test for RS-232 OperationsInstallation Test for IEEE-488 Operations Cabling the Meter to a HostHow the Meter Processes Input If Test FailsInput Strings Input TerminatorsSending Numeric Values to the Meter Sending Command Strings to the MeterTypical IEEE-488 Input Strings Page Typical IEEE-488 Input Strings External Triggering from the Front Panel How the Meter Processes OutputTriggering Output Setting the Trigger Type Configuration External Triggering via the Computer InterfaceService Requests IEEE-488 Only and Status Registers Settling DelayTrigger Type Rear TriggerRead Command Write CommandEnable Register Status Register SummaryESB MAV 3 2 1 Event Status and Event Status Enable Registers Event Status and Event Status Enable RegistersStatus Byte Register Reading the Status Byte RegisterDescription of Bits in ESR and ESE Bit No Name True Set to 1 ConditionsTrue Set to 1 Condition Service Request Enable RegisterDescription of Bits in the Status Byte Register Bit No Name Computer Interface Command Set IEEE-488 Capabilities and Common CommandsIEEE-488 Common Commands IEEE-488 Interface Function Subsets10. IEEE-488 Common Commands Number State11. Function Commands and Queries Primary Secondary Display Function Commands and QueriesFunction Modifier Commands and Queries Command 12. Function Modifier Commands and Queries Description12A. Reference Impedance Values Ref Impedance Value Ref ImpedanceMIN Range and Measurement Rate Commands and Queries Ohms RangeCurrent Range Frequency Range14. Measurement Queries Description 13. Range and Measurement Rate Commands and QueriesMeasurement Queries Compare Commands and Queries Trigger Configuration Commands15. Compare Commands and Queries Description 16. Trigger Configuration Commands DescriptionMiscellaneous Commands and Queries 17. Miscellaneous Commands and Queries Description16A. Measurement Units Output with Format 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 FusesFront Panel Input Terminal Replacing the 100 mA Input FuseReplacing the 10 a Input Fuse Performance Tests Self-Test Diagnostics and Error CodesError No Self-Test Error Codes Meaning Service Input LevelFrequency Min MaxUsing decades 300 Ω Short 30 kΩ Replacement Parts Replacement PartsPerformance Tests for mA Current Functions Min Max 29.982 30.018TM1 TM2 TM3 TM4 TM5 Appendices Page Response Times Display Counts and Reading RatesRS-232 and IEEE-488 Reading Transfer Rates Normal Mode Rejection Ratio Common Mode Rejection RatioDC Voltage Input ImpedanceDecibel Resolution True RMS AC Voltage, AC-CoupledMaximum Input AccuracyAC + DC Voltage Accuracy Maximum Crest Factor Common Mode Rejection RatioDecibel Reference Resistance DC Current AC CurrentRange Slow AccuracyMaximum Crest Factor Maximum Input RangeFrequency Slow Accuracy Medium FastOhms Diode Test/ContinuitySensitivity Level of AC Current FrequencySensitivity of AC Voltage 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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