Fluke 39, 41B user manual Receptacle Load Center Neutral Current Measurement

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Applications

Measure for excessive current (tripping of circuit breakers) and other general measurements (such as level of current flow) in each circuit. Measure balance between phases, neutral current and frequency, and harmonic distortion.

Measure input current, crest factor, and harmonics for PC, copier, printer, and single phase UPS. Most electronic equipment loads are nonlinear due to their use of switching-type power supplies.

Black

Red

ON

OFF

41B

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Figure 24. Receptacle Load Center (Neutral Current Measurement)

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Contents Fluke 39/41B Limited Warranty & Limitation of Liability Service Centers Page Table of Contents Fluke 39/41B List of Tables List of Figures Using!Your Tester Safely AC Current Probe Safety Guidelines Uses for the Tester About This ManualUnpacking Unpacking Additional Items Model 41B Terminology Used in This Manual Memory Retention Battery ConsiderationsAutomatic Power Down Gettingto Acquainted with Your Tester Getting Acquainted Input Connections Using the Voltage Test LeadsMeasurement Connections 1P Using the Current ProbeThree-Phase Measurement Connections For Balanced Circuits Three-Phase Power MeasurementsWtotal = W1 + W2 Three-Phase Measurement, Balanced or UnbalancedWtotal = W1 + W2 + W3 Keypad KeypadKeypad Number Key Descriptions Symbol Name & DescriptionNumber Symbol Name & Description Key Descriptions Number Name & Description Print Model 41B Key Descriptions Number Symbol Name & DescriptionDisplay Screen Display ScreenStatus Line DP ase Angle degrees. ± Screen Abbreviations Screen Usage Name and DescriptionScreen Usage Name and Description Screen AbbreviationsVolts rms includes dc component Special Messages Functions and Screen Modes Waveform Screen ModeWaveform Screens Functions and Screen Modes Harmonics Screens Harmonics Overload Screen Harmonics Zoom Screen Harmonics Zoom ModeText Screen Mode Text Screens VA Check Screen Typical VA Check Signatures Recording Measurements Record Screens THD RMS Power-Up ConfigurationConfiguration Screens Memory Screen Storing & Recalling Measurements Model 41B39/41B Store Using the Serial Cable Model 41B Serial Communications Model 41B Sending to a Printer or PC Model 41B Using PC Software with the Tester Model 41BPrinting Model 41B Applications Applications Plant Switch Gear Plant Switch Gear Service EntranceDistribution Transformer 1PWatts Text Screen Distribution TransformerDistribution Transformer 3P, 3C Watts Text Screen Electronic Equipment Load CenterReceptacle Load Center Neutral Current Measurement Generator Set Generator SetAdjustable Frequency Motor Drive Adjustable Frequency Speed Motor DriveBattery Replacement User MaintenanceCleaning Fuse ReplacementUser Maintenance If Your Tester Does Not Work Accessories and Replacement Parts Accessories and Replacement PartsQty Replacement Parts DescriptionFluke PN MV/A Isolated Input SpecificationsWatts Measurements Volt-Amps Harmonic Level 5% Using Smooth ~20Accuracy Range/ResolutionMeasurement Function Watts AC VoltsAC Amps General Specifications Display Safety 39/41B