User`s guide

Remarks
Selecting an integration time with this command changes any aperture set
with the [SENSe:]VOLTage[:DC]:APERture command.
Only those integration times set to an integral number of power line cycles
(1, 2, 10, or 100 PLCs) provide normal mode (line frequency noise)
rejection.
Setting the integration time also sets the resolution for the measurement.
The following table shows the relationship between integration time and
resolution.
Integration Time
(power line cycles)
Resolution
0.001 PLC
(34411A/L4411A)
30 ppm x Range
0.002 PLC
(34411A/L4411A)
15 ppm x Range
0.006 PLC
6.0 ppm x Range
0.02 PLC
3.0 ppm x Range
0.06 PLC 1.5 ppm x Range
0.2 PLC 0.7 ppm x Range
1 PLC (default)
0.3 ppm x Range
2 PLC
0.2 ppm x Range
10 PLC
0.1 ppm x Range
100 PLC
0.03 ppm x Range
The instrument sets the integration time to 1 PLC after a Factory Reset