Features and Functions 3
Agilent U1251B/U1252B User’s and Service Guide 59
1 ms Peak Hold
The Peak Hold 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
1 Press for more than 1 second to toggle 1 ms Peak
Hold mode ON / OFF.
2 Press to scroll through maximum and minimum
peak readings. MAX indicates the maximum peak,
while MIN indicates the minimum peak.
3 Press and hold or for more than 1 second
to exit this mode.
4 According to the measurements shown in Table 3- 6 on
page 60, the crest Factor will be 2.5048/1.768 =1.416.
• If the reading is "OL", press to change the measuring range
and to re-start the peak-recording measurement.
• If you need to re-start the peak recording, press
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