Fluke 41B, 39 user manual Typical VA Check Signatures

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39/41B

Users Manual

A linear load with no phase shift.

A linear load with phase shift. A narrow ellipsoid in this pattern usually does not mean there is a problem. For wider ellipsoids, check power factor (PF). If the ellipsoid is backwards (upper left to lower right), check that you have pointed the current probe in the right direction.

A nonlinear load, usually resulting from pulse-type power supplies.

A nonlinear load resulting from a 3-phase (six pulse) rectifier power supply.

A linear load that is 180 degrees out of phase. A Current Probe pointed in the wrong direction or reversed polarity voltage leads can cause this indication. This incorrect alignment will also cause negative power readings.

A combination of harmonic content and phase shift of the fundamental frequency.

A pattern indicative of a silicon-controlled rectifier (SCR) power supply.

a14c.eps

Figure 15. Typical VA Check Signatures

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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 About This Manual Uses for the TesterUnpacking Unpacking Additional Items Model 41B Terminology Used in This Manual Memory Retention Battery ConsiderationsAutomatic Power Down Gettingto Acquainted with Your Tester Getting Acquainted Using the Voltage Test Leads Input ConnectionsUsing the Current Probe Measurement Connections 1PThree-Phase Power Measurements Three-Phase Measurement Connections For Balanced CircuitsThree-Phase Measurement, Balanced or Unbalanced Wtotal = W1 + W2Wtotal = W1 + W2 + W3 Keypad KeypadNumber Key Descriptions Symbol Name & Description KeypadNumber Symbol Name & Description Key Descriptions Number Name & Description Key Descriptions Number Symbol Name & Description Print Model 41BDisplay Screen Display ScreenStatus Line Screen Abbreviations Screen Usage Name and Description DP ase Angle degrees. ±Screen Abbreviations Screen Usage Name and DescriptionVolts rms includes dc component Special Messages Waveform Screen Mode Functions and Screen ModesWaveform Screens Functions and Screen Modes Harmonics Screens Harmonics Overload Screen Harmonics Zoom Mode Harmonics Zoom ScreenText Screen Mode Text Screens VA Check Screen Typical VA Check Signatures Recording Measurements Record Screens Power-Up Configuration THD RMSConfiguration Screens Storing & Recalling Measurements Model 41B Memory Screen39/41B 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 Service Entrance Plant Switch GearDistribution Transformer Distribution Transformer 1PWatts Text ScreenElectronic Equipment Load Center Distribution Transformer 3P, 3C Watts Text ScreenReceptacle Load Center Neutral Current Measurement Generator Set Generator SetAdjustable Frequency Speed Motor Drive Adjustable Frequency Motor DriveUser Maintenance CleaningFuse Replacement Battery ReplacementUser Maintenance If Your Tester Does Not Work Accessories and Replacement Parts Accessories and Replacement PartsQty Replacement Parts DescriptionFluke PN Specifications MV/A Isolated InputHarmonic Level 5% Using Smooth ~20 Watts Measurements Volt-AmpsAccuracy Range/ResolutionMeasurement Function Watts AC VoltsAC Amps General Specifications Display Safety 39/41B