Features and Functions 3
Agilent U1251A/U1252A User’s and Service Guide 67
1 ms Peak Hold
This function allows the measurement of half- cycle peak
voltage for analysis of components such as power distribu-
tion 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 Push for more than 1 second to toggle 1 ms Peak
Hold mode ON / OFF.
2 Push to scroll through maximum and minimum
peak readings. MAX indicates maximum peak,
while MIN indicates minimum peak.
3 Push or for more than 1 second to exit this
mode.
4 According measurements in Figure 22, the crest Factor
will be 2.5048/1.768 =1.416.
NOTE
• If the reading is "OL", push to change measuring range and to
re-start peak-recording measurement.
• If you need to re-start peak recording, push
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