Power-Measurement Application Examples
THS710A, THS720A, THS730A & THS720P User Manual
2–49
Setup to Measure Transient Current
S
PE
CH 1 Probe Type Current
Probe
Set to
100 mV/A
ACQUIRE Stop After Single
Acquisition
Sequence
HOLD
(RUN/STOP)
— —
When you start the motor, the instrument captures the transient
current and freezes the waveform in the display.
Going Further
You can measure the true RMS current of the transient current using
the following technique:
1. Turn on automated measurements for channel 1 and select the
BrstW (burst width) and RMS measurements. Refer to page 3–31
for infomation about automatic measurements.
2. Record the BrstW and RMS measurements.
3. Record the SEC/DIV setting.
4. Calculate the true RMS value of the transient current using
recorded values in the one of the equations below:
True RMS RMS 10
SECDIV
BrstW
True RMS RMS 100
SECDIV
BrstW
(if MAG is off)
(if MAG is on)
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