Keysight Technologies U1273A Guide De L'utilisateur page 54

2 Making Measurements
Crest Factor
The crest factor may be determined by using this formula:
You may refer to
the peak values.
The crest factor may be up to 3.0 at full-scale except for the 1000 V range where
it is 1.5 at full scale, as explained in the table below:
Exceeding the crest factor limit may result in an incorrect or a lower reading.
WARNING
Do not exceed the crest factor limit to avoid instrument damage and the risk
of electric shock.
54
Peak value
Crest factor = --------------------------------- -
True RMS value
"Capturing Peak Values (Peak)"
Vol tage range
30 mV
300 mV
3 V
30 V
300 V
1000 V
on page 112 on how to obtain
Crest factor
3
3
3
3
3
1.5
Keysight U1273A/U1273AX User's Guide
Maximum input (V )
peak
+/– 90 mV
+/– 900 mV
+/– 9 V
+/– 90 V
+/– 900 V
+/– 1500 V