METREL EurotestXE, Instruction Manual

Page: 64 / 114

MI 3102(H) BT Eurotest XE Measurements
64
5.11
Harmonics
Harmonics are components of the voltage and currents signal with an integer multiple of the
fundamental frequency. The harmonic values are an important parameter of power quality.
See chapter 4.2 Function selection for instructions
on key functionality.
Figure 5.48: Harmonics menu
Settings and parameters in Harmonics function
Input Displayed parameters [ voltage U or current I]
h:0.-.h:11 Selected harmonic
Connection for the Harmonics measurement
See Figure 5.46 .
Harmonics measurement procedure

Select HARMONICS function from the OTHERS menu .

Select test parameters (optional).

Connect voltage test leads and current clamp to the instrument.

Connect the voltage test leads and current clamp to the item to be tested (see Figure
5.46 ).

Press the TEST key to start the continuous measurement.

Press the TEST key again to stop the measurement.

Store the result by pressing the MEM key (optional)
Figure 5.49: Examples of Harmonics measurement results
Displayed results for the Harmonics measurement:
Uh ............ TRMS voltage of selected harmonic
Ih .............. TRMS current of selected harmonic
THDU ....... voltage total harmonic distortion
THDI ......... current total harmonic distortion
Notes:

For setup of current clamps (see chapter 4.4.9 Clamp Settings ).

Parameters (input and number of harmonic) can be changed and results can also be
stored while the measurement is running.

Displayed graph is auto-ranged.