6-8 Keysight E5260/E5270 User’s Guide, Edition 6
Function Details
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, execute the RM command. The RM
command selects the following operation mode and the rate value. The rate value
defines the boundary of ranging.
•Mode 1:
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.
•Mode 2:
If the following condition is satisfied, the range changes up after measurement.
Measurement value ≥ current1
•Mode 3:
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 200 mA, they must be:
current1 = 200 mA × rate/100
current2 = 100 mA × rate/100
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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