Agilent Technologies EasyEXPERT Guide de l'utilisateur Page 302

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4- 58 Agilent EasyEXPERT Users Guide Vol. 1, Edition 1
Function Details
SMU Ranging Mode
Enhanced Auto Ranging for Current Measurement
Expanded functions are available for the auto ranging operation of the current
measurement channel. To use the functions, set Range Change Rule. See
“SMU
Range Setup Window” on page 2-48. Rate value defines the boundary of ranging.
Range Change Rule=BY FULL RANGE:
Performs normal auto ranging operation. If a condition shown below is satisfied,
the range changes immediately, even during measurement.
Measurement value > Range X/100
Measurement value Range 0.1
where X=115, or 100 at the maximum range.
Range Change Rule=GO UP AHEAD:
If the following condition is satisfied, the range changes up after measurement.
Measurement value current1
Range Change Rule=UP AND DOWN AHEAD:
If the following condition is satisfied, the range changes down immediately,
even during measurement.
Measurement value current2
If the following condition is satisfied, the range changes up after measurement.
Measurement value current1
where current1 and current2 are given by the following formula. Then rate must be
an integer, 11 to 100.
current1 = Range rate/100
current2 = Range rate/1000
For example, if the range value is 10 mA and rate is 90, they are:
current1 = 9 mA
current2 = 0.9 mA
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