Fluke 39, 41B user manual VA Check Screen

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G VA Check Screen

VA Check Screen

Press Gat any time to access the VA Check screen, which displays volts graphed against amps. P ess Ga second time to exit the VA Check screen and return to your sta ting point.

provide a meaningfulfordisplay. If the Tester is set for manual ranging (MAN), both scales (ranges) a e fixed; you may have to choose AUTO (press rfor 1 second) or select an app opriate manual range in either V or A, or both

With the VA Check sc een, the Tester displays one cycle of the fundamental frequency (current on the vertical scale, voltage on the horizontal scale). The resulting graph can appear as a straight line, a stepped line, an ellipsoid, or as some other pattern that you would normally expect to see on an oscilloscope with two input channels.

Use the VA Check sc een to show the phase shift of the fundamental frequency and detect the existence and severity of nonlinearity caused by harmonics. It could be that the VA Check screen may simply show that you

have clamped the Cu	ent Probe in the wrong direction. Figure 15 shows
some typical VA Check signatures.
When the Tester is set	autoranging (AUTO), ranges for the vertical and
horizontal scales on the VA Check screen are adjusted automatically to

functions (i.e., press briefly for each range change).

Note

V or A ranges cannot be changed while in the VA Check screen.

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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 Automatic Power Down Battery ConsiderationsMemory Retention 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 Printing Model 41B Using PC Software with the Tester Model 41BSending to a Printer or PC 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 PartsFluke PN Replacement Parts DescriptionQty MV/A Isolated Input SpecificationsWatts Measurements Volt-Amps Harmonic Level 5% Using Smooth ~20Measurement Function Range/ResolutionAccuracy AC Amps AC VoltsWatts General Specifications Display Safety 39/41B