User manual

2400 Series SourceMeter
®
User’s Manual SCPI Command Reference 18-65
Select auto range
AUTO <b>
[:SENSe[1]]:CURRent[:DC]:RANGe:AUTO <b> Control auto ranging for amps
[:SENSe[1]]:VOLTage[:DC]:RANGe:AUTO <b> Control auto ranging for volts
[:SENSe[1]]:RESistance:RANGe:AUTO <b> Control auto ranging for ohms
Parameters <b> = 0 or OFF Disable auto range
1 or ON Enable auto range
Query :AUTO? Query state of auto range
Description This command is used to control auto ranging. With auto ranging
enabled, the instrument automatically goes to the most sensitive
range to perform the measurement.
When this command is used to disable auto range, the instrument
remains at the automatically selected range. When a range is manu
-
ally selected, auto range is disabled. (See previous command.)
NOTE For the Model 2430 Pulse Mode, auto range cannot be enabled (error +831).
LLIMit <n>
[:SENSe[1]]:CURRent[:DC]:RANGe:AUTO:LLIMit <n> Set auto ranging lower limit for amps
[:SENSe[1]]:VOLTage[:DC]:RANGe:AUTO:LLIMit <n> Set auto ranging lower limit for volts
[:SENSe[1]]:RESistance:RANGe:AUTO:LLIMit <n> Set auto ranging lower limit for ohms
Parameters <n> = -105e-6 to 105e-6 Amps lower limit
-21 to 21 Volts lower limit
-2.1e8 to 2.1e8 Ohms lower limit (2400 and 2410)
-2.1e7 to 2.1e7 Ohms lower limit (2420, 2425, 2430,
and 2440)
Query :LLIMit? Query auto range lower limit
Description Auto range lower limits are intended primarily for SYST:RCM MULT
support. (See
“SYSTem subsystem,” page 18-103.) The lower limit
for all three functions is programmable and must be less than or
equal to the upper limit. If the lower limit is equal to the upper limit,
auto ranging is effectively disabled. (See below.) When autoranging
is disabled, you can manually program the unit for any range below
the lower limit. Note also that the maximum volts lower limit depends
on the compliance setting (see below).