Fluke 45 user manual Multimeter Safety

Page 14

MULTIMETER SAFETY

The Fluke 45 Dual Display Multimeter has been designed and tested according to IEC Publication 348, Safety Requirements for Electronic Measuring Apparatus. This manual contains information and warnings which must be followed to ensure safe operation and retain the meter in safe condition. Use of this equipment in a manner not specified herein may impair the protection provided by the equipment.

The meter is designed for IEC 664, Installation Category II use. It is designed for use in circuits with a VA rating of <4800 VA.

Some common international electrical symbols used in this manual are shown below.

B

F

D

I

AC - ALTERNATING CURRENT

DC - DIRECT

CURRENT

EITHER AC OR DC CURRENT

FUSE

Y

J

W

T

DANGEROUS

VOLTAGE

EARTH GROUND

SEE EXPLANATION IN MANUAL

DOUBLE INSULATION FOR PROTECTION AGAINST ELECTRIC SHOCK

Before using the meter, read the following safety information carefully. In this manual, "WARNING," is reserved for conditions and actions that pose hazard(s) to the user; "CAUTION," is reserved for conditions and actions that may damage your meter.

WWARNING

TO AVOID ELECTRICAL SHOCK OR OTHER INJURY:

•Avoid working alone

•Follow all safety procedures for equipment being tested.

•Inspect the test leads for damaged insulation or exposed metal. Check test lead continuity. Damaged leads should be replaced.

•Be sure the meter is in good operating condition.

•Select the proper function for your measurement.

•To avoid electrical shock, use caution when working above 60V dc or 30V ac RMS.

•Disconnect the live test lead before disconnecting the common test lead.

• Disconnect the power and discharge high-voltage capacitors before testing in Ω and LR.

•When making a current measurement, turn the circuit power off before connecting the meter in the circuit.

•Check meter fuses before measuring transformer secondary or motor winding current. (See Section 6, MAINTENANCE.") An open fuse may allow high voltage build-up, which is potentially hazardous.

•Use clamp-on probes when measuring circuits exceeding 10 amps.

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

•Do not allow meter to be used if it is damaged or if its safety is impaired.

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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 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 MediumFrequency Ranging Measuring FrequencyManual Ranging Frequency Sensitivity Selection Frequency Measurement RatesMeasuring Frequency of Current 100 mA and 10A Inputs 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 AllTrue RMS Measurements When Measuring ResistanceTwo-Wire Configuration 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 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 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 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 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 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 Range14. Measurement Queries Description 13. Range and Measurement Rate Commands and QueriesMeasurement Queries 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 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 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 Response Times Display Counts and Reading RatesRS-232 and IEEE-488 Reading Transfer Rates DC Voltage Normal Mode Rejection RatioCommon Mode Rejection Ratio Input ImpedanceMaximum Input Decibel ResolutionTrue RMS AC Voltage, AC-Coupled AccuracyAC + DC Voltage Accuracy Maximum Crest Factor Common Mode Rejection RatioDecibel Reference Resistance Range Slow DC CurrentAC Current 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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