Ms Peak Hold; Figure 3-10 1 Ms Peak Hold Mode; M Peak Hold Mode - Keysight U1401B User's And Service Manual

1 ms peak hold

This function allows the measurement of peak voltage for analysis of components
such as power distribution transformers and power factor correction capacitors.
The peak voltage obtained can be used to determine the crest factor.
Crest factor = Peak value/True-rms value
To measure the half-cycle peak voltage:
1 Press
2 Press
3 If the reading is OL, press
4 While the peak hold mode is on, you can press
Figure 3-10
Keysight U1401B User's and Service Guide
for more than one second to toggle 1 ms peak hold mode on or off.
to show the peak+ or peak– value after activating the peak mode.
The DH MAX annunciator indicates the peak+ value while the DH MIN
annunciator indicates the peak– value. See
the peak value measurement.
peak value measurement.
Press
1 ms peak hold mode
Figure 3-10
to change the measurement range and restart
Press
1 s
Press
Press
to restart
1 s
Making Measurements
on page 75.
at any time to restart the
Press
to change
range
3
75