Agilent Technologies B1500A Guía de usuario Pagina 434

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7- 52 Agilent B1500 User’s Guide, Edition 7
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 5-48. Rate value defines the boundary of ranging.
Range Change Rule=B
Y 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 Ra
nge × 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 m
easurement.
Measurement value current1
Range Change Rul
e=UP AND DOWN AHEAD:
If
the following condition is satisfied, the range changes down immediately,
even during measurement.
Meas
urement value current2
If the following condition is satisfied, the range changes up after m
easurement.
Measurement value current1
where curr
ent1 and current2 are gi
ven by the following formula. Then rate must be
an integer, 11 to 100.
current1 = Range × rat
e/100
current2 = Range × rat
e/1000
For example, if the range value is 10 mA and rate is 90, they are:
cur
rent1 = 9 mA
current2 = 0.9 mA
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