Keithley 2001

IEEE-488 Reference
4-118
:FRESh
[:SENSe[1]]:DATA:FRESh Request new reading.
Description
This query command is used to return a new (fresh) reading. This command will not return the
same reading more than once. If sent again, this command will wait until a new reading is trig-
gered and available.
Programming example
10 OUTPUT 716; “:data:fresh?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Requests fresh reading.
Line 20 Addresses 2001 to talk.
Line 30 Displays the reading.
4.19.5
:APERture <n>
[:SENSe[1]]:CURRent:AC:APERture <n> Set aperture for ACI
[:SENSe[1]]:CURRent{:DC]:APERture <n> Set aperture for DCI
[:SENSe[1]]:VOLTage:AC:APERture <n> Set aperture for ACV
[:SENSe[1]]:VOLTage[:DC]:APERture <n> Set aperture for DCV
[:SENSe[1]]:RESistance:APERture <n> Set aperture for Ω 2
[:SENSe[1]]:FRESistance:APERture <n> Set aperture for Ω 4
[:SENSe[1]]:TEMPerature:APERture <n> Set aperture for TEMP
Parameters
<n> = 166.6666666667e-6 to 200e-3 Integration period in seconds
= DEFault Power line cycle integration:
16.67msec for 60Hz power line
20msec for 50Hz and 400Hz power line
= MINimum 166.6666666667e-6sec
= MAXimum 200e-3sec
where; 166.6666666667e-6 = 166.6666666667µsec.
200e-3 = 166.6666666667msec.
Formats :curr:ac:aper <n> :curr[:dc]:aper <n>
:volt:ac:aper <n> :volt[:dc]:aper <n>
:res:aper <n> :fres:aper <n>
:temp:aper <n>
Defaults
Power-up Saved power-on setup
*RST Power line cycle integration:
16.67msec for 60Hz power line
20msec for 50Hz and 400Hz power line
:SYSTem:PRESet Same as *RST
Query
:APERture? Query programmed aperture value.
:APERture? DEFault Query *RST default aperture value.
:APERture? MINimum Query minimum aperture value.
:APERture? MAXimum Query maximum aperture value.