Hioki 3290-10, Instruction Manual, Page: 88 / 152

82
4.6 Measuring Duty
Measurement
Process
For DC measurements, the meter splits the signal into positive and
negative components before low-pass filtering. The inherent
response time of the filter suppresses the detection of short pulses,
so errors can result in the operating time measurement. This error
can affect the duty measurement (although current values below
the threshold have no affect on the measurement).
In AC and AC+DC modes, measurement response time is affected
by RMS/DC conversion. If severe current fluctuations (at 45 Hz
and above) are present, we recommend measuring in FAST mode.
Timer Setting
If no timer settings are needed, confirm that the timer is disabled by
pressing the
button (twice), and skip ahead to "Starting
Measurement" (page 84).
7.
Press the button to display the timer.
8.
Press
SHIFT
→
(
INPUT/SET
) to display the numerical
entry display.
Threshold
Threshold
After LPF
Short time below threshold
(about 10 seconds or less)
Signals shorter than the minimum
threshold time are not detected
Blinking