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Section

6: SCPI command reference Model 2450 Interactive SourceMeter® Instrument

Reference Manual

6-54 2450-901-01 Rev. B/September 2013

For example, for current measurements, if you expect a reading of approximately 50 mA, set <n> to 0.05 (or

50e-3) to select the 100 mA range. For voltage measurements, if you expect a reading of approximately 50 mV,

let <n> = 0.05 (or 50e-3) to select the 200 mV range.

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.

This setting is ignored if the source function is the same as the measurement function. In that situation, the

measurement range is the same as the source range, regardless of the setting of

[:SENSe[1]]:<function>:RANGe[:UPPer]. However, the setting for the measurement range is retained,

and when the source function is changed, the retained measurement range is used.

When you send the [:SENSe[1]]:<function>:RANGe[:UPPer] command,

[:SENSe[1]]:<function>:RANGe:AUTO for the selected function is automatically set to disabled.

When you query this attribute, the instrument returns 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 query 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.

Example 1

:SENS:CURR:RANG 10E-6

Select the 10

A range.

Example 2

:SENS:RES:RANG 2E6

Select the 2 M

Ω

range.

Example 3

:SENS:VOLT:RANG 50e-3

Select the 200 mV range.

Also see

Ranges (on page 2-101)

[:SENSe[1]]:<function>:RANGe:AUTO (on page 6-50)

Keithley 2450 User Manual

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