Keithley Interactive SourceMeter 2450, Справочное руководство, Страница: 370 / 878

Model 2450 Interactive SourceMeter® Instrument Reference Manual Section 6: SCPI command reference
2450-901-01 Rev. B/September 2013 6-53
[:SENSe[1]]:<function>:RANGe[:UPPer]
This command sets the positive full-scale value of the measurement range for measurements of the selected
function.
Type Affected by Where saved Default value
Command and query Recall settings
Instrument reset
Power cycle
Measure configuration list
Save settings
Measure configuration list
Current: 1e-4
Resistance: 2e5
Voltage: 20
Usage
[:SENSe[1]]:<function>:RANGe[:UPPer] <n>
[:SENSe[1]]:<function>:RANGe[:UPPer]?
[:SENSe[1]]:<function>:RANGe[:UPPer]? DEFault
[:SENSe[1]]:<function>:RANGe[:UPPer]? MINimum
[:SENSe[1]]:<function>:RANGe[:UPPer]? MAXimum
<function>
The measurement function to which this setting applies:
•
Current:
CURRent[:DC]
•
Resistance: RESistance
•
Voltage: VOLTage[:DC]
<n>
Set this command to a specific value or a preset value:
Current: 1e-08 to 1 amps
Resistance: 20 to 2e8 ohms
Voltage: 0.02 to 200 volts
Details
When you assign a range value, the instrument is set on a fixed range that is large enough to measure the
assigned value. The instrument selects the best range for measuring the maximum expected value.
This command is primarily intended to eliminate the time that is required by the instrument to select an automatic
range.
Note that when you select a fixed range, an overrange condition can occur.
If the source function is the same as the measurement function (for example, sourcing voltage and measuring
voltage), the measurement range is the same as the source range, regardless of measurement range setting.
However, the setting for the measure range is retained, and when the source function is changed (for example,
from sourcing voltage to sourcing current), the retained measurement range is used.
When you set a value for the measurement range, the measurement autorange setting is automatically disabled
for the measurement function.
When you read this setting, you see the positive full-scale value of the measurement range that the instrument is
presently using. If you change the range while the output is off, the instrument does not update the hardware
settings, but if you read the range setting, the return is the setting that will be used when the output is turned on.
If you set a range while the output is on, the new setting takes effect immediately. When you assign a specific
value to this command, the instrument is set on a fixed range that is large enough to measure the assigned
value. The instrument selects the best range for measuring a value of <n> .