Manual Ranging - Keithley SourceMeter 2400 User Manual

®
2400 Series SourceMeter User's Manual
2425 and 2430 — Range limitations are source mode dependent:
2425 and 2430 DC Mode — With the 100V V-Source range selected, the highest
current measurement range is 1A. With the 20V V-Source range selected, the highest
current measurement range is 3A. With the 1A I-Source range selected, the highest
voltage measurement range is 100V. With the 3A I-Source range selected, the highest
voltage measurement range is 20V.
2430 Pulse Mode — With the 100V V-Source range selected, the highest current
measurement range is 10A. With the 10A I-Source range selected, the highest voltage
measurement range is 100V.
2440 — With the 40V V-Source range selected, the highest current measurement range is
1A. With the 1A I-Source range selected, the highest voltage measurement range is 40V.
With the 5A I-Source range selected, the highest voltage measurement range is 10V.
The present I-Compliance range determines the highest current measurement range that
can be selected. Similarly, the present V-Compliance range determines the highest voltage
measurement range that can be selected. For example, if I-Compliance is on the 100mA
range, the highest current measurement range that can be selected is 100mA. If
V-Compliance is on the 2V range, the highest voltage measurement range that can be
selected is 2V.

Manual ranging

For the Source V Measure I, Source I Measure V, and Ohms configurations, the RANGE
and keys are used to select a fixed range. Note that the highest available range is
dependent on the corresponding compliance setting. (See
page 7-2.)
Within range compliance or if the instrument displays the "OVERFLOW" message on a
particular range, select a higher range until an on-range reading is displayed. Use the low-
est range possible without causing an overflow to ensure best accuracy and resolution.
Auto ranging
NOTE For the Model 2430, auto ranging cannot be performed while in the Pulse Mode.
Therefore, all the following information on auto ranging is not applicable to the
Model 2430 Pulse Mode.
For the Source V Measure I, Source I Measure V, and Ohms configurations, press AUTO
RANGE to enable auto ranging. The AUTO annunciator turns on when auto ranging is
selected. With auto ranging selected, the instrument automatically chooses the best range
to measure the applied signal. Note that the highest available range is dependent on the
corresponding compliance setting. (See
Auto range considerations
Auto ranging can adversely affect overall measurement speed. The amount of speed
reduction will depend on the number of range changes required. See system speed specifi-
cations in Appendix A
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Range, Digits, Speed, and Filters
"Ranging limitations,"
"Ranging limitations," page
for more information.
7-3
7-2.)