## KNOWLEDGEBASE

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(42) Results were found. Showing 31-40.

### Unstable Measured Values of Efficiency When Measuring at I/O Efficiency From Input Power ΣA and Output Power ΣB to and From the Instrument

The measurement intervals of the measured I/O data must overlap exactly. Check the sync source setting. For example, route the input to a three-phase device under measurement to input elements 1-3 on the power meter, an...

### Why Doesn't the Voltage, Current, Power Values Measured on Power Meter A Match Those From Power Meter B?

Check for differences in the specifications or features of the instruments. For values that do not match when inputting a 50/60 sine wave Check whether the value is within the specifications (error) of each power meter...

### Why Won't the Measured Values of the Fundamental Wave Components and the Bar Graph of the Harmonics Display on the WT3000?

When the selected data update cycle of the fundamental wave is shorter than the width of the analysis window determined by the fundamental frequency (cycle of the fundamental wave), measurement is not performed and no da...

### Why Doesn't the Power, Power Factor, and Phase Angle of Each Input Element Match When Measuring Balanced a Three-Phase Load?

In the case of three-phase three-wire, or 3V3A wiring, the power, power factor, and phase angle of each input element do not match because it is the line to line voltage that is measured.   Please download and refer to...

### Why is the Theoretical Calulated Three-Phase Apparent Power Values (ΣVA and ΣS) Different From the Measured Values?

This is due to measurement and calculation error, or differences in calculation methods.   On the WT, the three-phase apparent power (ΣS) equation is calculated under the assumption of a balanced condition (the absolute...

### Why are the Measured Values Negative When Measuring a Balanced Three-Phase Load?

In the three-phase three-wire, or 3V3A wiring scheme, the phase angle of voltage and current input to each input differs from that of the actual load because it is the line to line voltage that is measured.  In three-pha...

### Why are the Measurement for Voltage, Current, and Power in Normal Mode Different Than Harmonic Mode?

The difference in measurement values can be attributed to the difference in calculation methods for normal mode and harmonic mode.   The voltage, current, and power in normal mode are displayed as the total of the measu...

### Why Doesn't the WT3000 Display the Phase Difference φU1-U2 of Voltage Between Phases?

Please verify the following settings on the WT3000: Wiring System set to 3P3W or 3V3A ITEM set to φUi-Uj Element set to ΣA ITEM set to φUi-UkWiring 3P4W or 3P3W(3V3A)Assign element 1,2, 3 to ΣA Update rate is not too f...

### Is it Possible to Display the RMS and DC Values of Voltage/Current at the Same Time?

Unfortunately the WT3000 cannot display the RMS and DC values of voltage/current at the same time, even if you use the user-defined function feature. You must select either RMS or DC mode in the Voltage/Current Range Mo...

### How Much Time is Required to Print Using the Internal Printer When Performing Harmonic Analysis?

Output function: HArWhen the default output item is set to 1, the printout time for up to the 50th order is about 116 seconds. The printout time for up to the 25th order is about 75 seconds. Output function: HArWhen the ...

How does the new WT300 provide reliable power measurements for your application?
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