Applications 4
True RMS Measurements
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| PEAK VOLTAGES | METERED VOLTAGES | DC AND AC | |||||||
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| AC COMPONENT ONLY | DC | TOTAL RMS | |||||||
INPUT |
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| TRUE RMS = | ||||||
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| COMPONENT | |||||||||
WAVEFORM | RMS CAL* | FLUKE 45 | |||||||||
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| ONLY | ac | 2 | + dc | 2 | |||||
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SINE |
| 2.828 |
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| 1.414 |
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PK |
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| 1.000 |
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0 |
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| 1.000 |
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| 0.000 |
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| 1.000 |
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RECTIFIED SINE | 1.414 |
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(FULL WAVE) |
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| 1.414 |
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PK |
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| 0.421 | 0.436 |
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| 0.900 |
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0 |
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| 1.000 |
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RECTIFIED SINE | 2.000 |
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(HALF WAVE) |
| 2.000 |
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| 0.779 |
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PK |
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| 0.771 | 0.636 |
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0 |
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| 1.000 |
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SQUARE |
| 2.000 |
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PK |
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| 1.000 | 1.111 |
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| 1.000 |
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0 |
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| 0.000 |
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| 1.000 |
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RECTIFIED |
| 1.414 |
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SQUARE |
| 1.414 |
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| 0.785 |
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| 0.707 |
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PK |
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| 0.707 |
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| 1.000 |
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RECTANGULAR | 2.000 |
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PULSE |
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| 2.000 |
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PK |
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| 4.442 K2 |
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0 X |
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Y |
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| 2D |
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D = X/Y |
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| 2 | D |
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K = |
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TRIANGLE |
| 3.464 |
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SAWTOOTH |
| 1.732 |
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PK |
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| 0.962 |
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| 1.000 |
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0 |
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| 0.000 |
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| 1.000 |
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*RMS CAL IS THE DISPLAYED VALUE FOR AVERAGE RESPONDING METERS THAT ARE CALIBRATED TO DISPLAY RMS FOR SINE WAVES
aam18f.eps