User`s manual

RESistance:APERture
[SENSe:]RESistance:APERture <time> sets the aperture (integration time) in
seconds. Values are rounded up to the nearest aperture time shown in the following
table.
Parameters
Parameter Name Parameter Type Range of Values Default Units
<time>
numeric
10 µs | 100 µs | 2.5 ms |
16.7 ms | 20 ms | 267 ms |
320 ms | MIN | MAX
seconds
Comments •
MINimum
sets the aperture time to 10 ms. MAXimum sets the aperture time to
320 ms.
• The fastest aperture time available when autoranging is 100 µs. In order to specify an
aperture time of 10 µs, you must select a fixed range.
• Setting the aperture time also sets the integration time in power line cycles (PLCs)
and the resolution. For example, an aperture time of 16.7 ms (60 Hz line frequency)
sets an integration time of 1 PLC. The corresponding resolution depends on the
function and range you select.
• The RES:APER command overrides the results of previously executed
RESistance:NPLC and RESistance:RESolution commands (the last command
executed has priority).
• The greater the aperture time, the greater the normal mode rejection (and the
lower the reading rate).
• For a 50 Hz line frequency, only the 20 ms and 320 ms settings provide normal
mode rejection of power line related noise. For a 60 Hz line frequency, only the
16.7 ms and 267 ms settings provide normal mode rejection of power line related
noise.
• *RST Condition: 16.7 ms (60 Hz) or 20 ms (50 Hz)
Example Setting the Aperture Time
RES:APER 2.67E-01 !Aperture time is 267 ms.
163 Command Reference Chapter 5