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Multimeter Command Reference 131Chapter 3
FRESistance:APERture
[SENSe:]FRESistance:APERture <number> sets the integration time in seconds
for 4-wire resistance measurements. Values are rounded up to the nearest aperture
time shown in the following table.
Parameters
Comments • MIN sets the aperture time to 0.333ms. MAX sets the aperture time to
1.66667 seconds (60Hz) or 2 seconds (50Hz).
• Setting the aperture time also sets the integration time in power line cycles
(PLCs) and the resolution. For example, an aperture time of 16.7ms (60Hz line
frequency) sets an integration time of 1 PLC. The corresponding resolution
depends on the function and range you select.
• The FRES:APER command overrides the results of previously executed
FRES:NPLC and FRES:RES commands. The last command executed has
priority.
• The greater the aperture time, the greater the normal mode rejection (and the
lower the reading rate).
• Related Commands: CALibration:LFRrequency
• *RST Condition: FRES:APER 0.166667 seconds (60Hz) or
FRES:APER 0.20000 (50Hz)
Example Set an Aperture Time of 16.7ms
FRES:APER 16.7E-03
Aperture time is 16.7ms.
FRESistance:APERture?
[SENSe:]FRESistance:APERture? [MIN|MAX] returns one of the following
numbers to the output buffer.
• The present aperture time in seconds if MIN or MAX is not specified.
• The minimum aperture time available (.333ms) if MIN is specified.
• The maximum aperture time available (1.67s @ 60Hz; 2s @ 50Hz) if MAX is
specified.
Example Query the Aperture Time
FRES:APER 167E-03
Aperture time is 167ms.
FRES:APER?
Query multimeter to return aperture time.
enter statement
Enter value into computer.
Parameter Name Parameter Type Range of Values Default Units
<
number>
numeric 0.333ms|3.33ms|16.7ms|
167ms|1.67s|MIN|MAX
seconds