Fluke 39, 41B user manual Functions and Screen Modes, Waveform Screen Mode

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Functions and Screen Modes

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Functions and Screen Modes

The Tester uses a set of multipurpose screens to present each type of measurement (volts, amps, watts) as a waveform, a relational bar chart of harmonics, or a series of digital (text) readouts. With multiple values and computations on each screen, you only need to press a few keys to see everything there is to know about power (or just voltage or current) at the test point. Cycle through the choices by pressing either (or both) of these keys.

The Tester preserves selections that are active in one screen as you switch to another screen. For example, if you are measuring harmonic 7in the Volts Harmonic Screen and change function, the Tester continues measuring harmonic 7in the amps and watts harmonic screens.

Waveform Screen Mode

Volts, amps, and watts waveform screens (Figure 10) use a common format to present information about the measurement inputs. This format shows digital information on top and a waveform on the bottom. The waveform vertical scale limits usually change automatically (AUTO on) to accommodate the magnitude of the input. The horizontal scale represents 0 through 360 degrees (one cycle) of the fundamental frequency.

With a waveform screen displayed, press <or >to activate the vertical cursor bar. Continue to press these keys to position the cursor along the horizontal degree scale. A second line of digital information defines the magnitude and phase for the point where the cursor bar intersects the waveform.

Note

In the waveform screens, the frequency displayed is the frequency of the fundamental. This is normally true even when the signal being measured contains an individual harmonic with an amplitude greater than the fundamental (such as the third harmonic in the neutral current of a 3P, 4-wire system supplying non-linear loads). To obtain the frequency of a harmonic, select the harmonic screen and use <and >to position the cursor arrow under the harmonic of interest.

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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